Theodore R Gull

Theodore R Gull

  • EMERITUS
  • 301.286.6184
  • NASA/GSFC
  • Mail Code: 667
  • Greenbelt , MD 20771
  • Employer: EMERITUS
  • Brief Bio

    Assistant Astronomer, University of Chicago, Yerkes Observatory 1970-1972
    Assistant Astronomer, Kitt Peak National Observatory, Tucson, AZ 1972-1975
    Principal Engineer, Lockheed Electronics, Houston, TX 1975-1977
    Astronomer, GSFC 1977-Present
    Associate Chief, Laboratory for Astronomy and Solar Physics 1983-1993
    Mission Scientist, Astro-1, 1982-1992
    Deputy Principal Investigator, Space Telescope Imaging Spectrograph, 1984-2009

    Current Projects

    Observational studies of Eta Carinae and the Homunculus coupled with modeling the massive binary winds and modeling the massive ejecta.

    Ongoing observations with HST, CHANDRA, Herschel, ESO's VLT and other facilities. Several collaborations leading to modeling which includes 3D wind-wind interaction studies with smoothed particle hydrodynamics, radiation transfer; atomic, molecular and dust evolution of the expanding Homunculus and Little Homunculus.

    Education

    BS Physics, MIT 1966
    PhD Astrophysics, Cornell, 1971
    XMBA, Loyola College, 1985

    Professional Societies

    American Astronomical Society , 1967 - Present
    International Astronomical Union, 1975 - Present
    Astronomical Society of the Pacific, 1973 - Present
    Royal Astronomical Society of Canada, 2007 - Present

    Professional Service

    Member, multiple thesis examination committees.
    Member, multiple NASA and NSF review panels.
    Member, advisory committe for Native American Tribal Colleges

    Awards

    Goddard Award of Merit

    ScD, South Dakota School of Mines and Technology

    NASA Exceptional Achievement Medal 1992

    NASA Equal Opportunity Medal 1998

    HST National Resource Award, Group Achievement Award, 1999

    STIS Servicing Mission Group Achievement Award, 1998

    Honored Guest – Black Hills Powwow 2005

    Publications

    Refereed

    Weigelt, G., K.-H. Hofmann, D. Schertl, et al. N. Clementel, M. F. Corcoran, A. Damineli, W.-J. de Wit, R. Grellmann, J. Groh, S. Guieu, T. Gull, M. Heininger, D. J. Hillier, C. A. Hummel, S. Kraus, T. Madura, A. Mehner, A. Mérand, F. Millour, A. F. Moffat, K. Ohnaka, F. Patru, R. G. Petrov, S. Rengaswamy, N. D. Richardson, T. Rivinius, M. Schöller, M. Teodoro, and M. Wittkowski. 2016. "VLTI-AMBER velocity-resolved aperture-synthesis imaging of η Carinae with a spectral resolution of 12 000." Astronomy & Astrophysics, 594: A106 (In Press) [10.1051/0004-6361/201628832]

    Madura, T. I., T. R. Gull, S. P. Owocki, et al. J. H. Groh, A. T. Okazaki, and C. M. Russell. 2012. "Constraining the absolute orientation of η Carinae’s binary orbit: a 3D dynamical model for the broad [Fe iii] emission★." Monthly Notices of the Royal Astronomical Society, 420 (3): 2064-2086 [10.1111/j.1365-2966.2011.20165.x]

    Madura, T. I., T. R. Gull, S. P. Owocki, A. T. Okazaki, and C. M. Russell. 2011. "Constraining the Properties of the Eta Carinae System via 3-D SPH Models of Space-Based Observations: The Absolute Orientation of the Binary Orbit." SociŽtŽ Royale des Sciences de Li?ge, Bulletin, vol 80, p 694-698 (Proceedings of the 39th Li?ge Astrophysical Colloquium, held in Li?ge 12-16 July 2010, edited by G Rauw, M De Becker, Y NazŽ, J-M Vreux, P Williams), 80: 694 [Full Text (Link)]

    Bautista, M. A., M. MelŽndez, H. Hartman, T. R. Gull, and K. Lodders. 2011. "The abundance of iron-peak elements and the dust composition in _ Carinae: manganese." Monthly Notices of the Royal Astronomical Society, 410: 2643 [Full Text (Link)] [10.1111/j.1365-2966.2010.17642.x]

    Oegerle, W. R., L. Feinberg, L. Purves, et al. T. Hyde, H. Thronson, J. Townsend, M. Postman, M. Bolcar, J. Budinoff, B. Dean, M. Clampin, D. Ebbets, Q. Gong, T. Gull, J. Howard, A. Jones, R. Lyon, B. Pasquale, C. Perrygo, S. Smith, P. Thompson, and B. Woodgate. 2010. "ATLAST-9.2: A Deployable Large Aperture UVOIR Space Telescope." American Astronomical Society, AAS Meeting #215, #48002; Bulletin of the American Astronomical Society, Vol 42, p569, 215: 569 [Full Text (Link)]

    Oegerle, W. R., L. D. Feinberg, L. R. Purves, et al. T. T. Hyde, H. A. Thronson, J. A. Townsend, M. Postman, M. R. Bolcar, J. G. Budinoff, B. H. Dean, M. C. Clampin, D. C. Ebbets, Q. Gong, T. R. Gull, J. M. Howard, A. L. Jones, R. G. Lyon, B. A. Pasquale, C. Perrygo, J. S. Smith, P. L. Thompson, and B. E. Woodgate. 2010. "ATLAST-9.2m: a large-aperture deployable space telescope." Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave Edited by Oschmann, Jacobus M, Jr; Clampin, Mark C; MacEwen, Howard A Proceedings of the SPIE, 7731: 81 [Full Text (Link)] [10.1117/12.857622]

    Groh, J. H., K. E. Nielsen, A. Damineli, et al. T. R. Gull, T. I. Madura, D. J. Hillier, M. Teodoro, T. Driebe, G. Weigelt, H. Hartman, F. Kerber, A. T. Okazaki, S. P. Owocki, F. Millour, K. Murakawa, S. Kraus, K. Hofmann, and D. Schertl. 2010. "Detection of high-velocity material from the wind-wind collision zone of Eta Carinae across the 2009.0 periastron passage." Astronomy and Astrophysics, 517 (A9): 17pp [10.1051/0004-6361/200913937]

    Bruhweiler, F. C., R. Freire Ferrero, M. O. Bourdin, and T. R. Gull. 2010. "The Young Interstellar Bubble Within the Rosette Nebula." The Astrophysical Journal, 719: 1872 [Full Text (Link)] [10.1088/0004-637X/719/2/1872]

    Postman, M., V. Argabright, B. Arnold, et al. D. Aronstein, P. Atcheson, M. Blouke, T. Brown, D. Calzetti, W. Cash, M. Clampin, D. Content, D. Dailey, R. Danner, R. Doxsey, D. Ebbets, P. Eisenhardt, L. Feinberg, A. Fruchter, M. Giavalisco, T. Glassman, Q. Gong, J. Green, J. Grunsfeld, T. Gull, G. Hickey, R. Hopkins, J. Hraba, T. Hyde, I. Jordan, J. Kasdin, S. Kendrick, S. Kilston, A. Koekemoer, B. Korechoff, J. Krist, J. Mather, C. Lillie, A. Lo, R. Lyon, P. McCullough, G. Mosier, M. Mountain, B. Oegerle, B. Pasquale, L. Purves, C. Penera, R. Polidan, D. Redding, K. Sahu, B. Saif, K. Sembach, M. Shull, S. Smith, G. Sonneborn, D. Spergel, P. Stahl, K. Stapelfeldt, H. Thronson, G. Thronton, J. Townsend, W. Traub, S. Unwin, J. Valenti, R. Vanderbei, M. Werner, R. Wesenberg, J. Wiseman, and B. Woodgate. 2009. "Advanced Technology Large-Aperture Space Telescope (ATLAST): A Technology Roadmap for the Next Decade." eprint arXiv:09040941, 0904: 941 [Full Text (Link)]

    Nielsen, K. E., G. V. Kober, K. Weis, et al. T. R. Gull, O. Stahl, and D. J. Bomans. 2009. "Eta Carinae Across the 20035 Minimum: Analysis in the Visible and Near-Infrared Spectral Region." The Astrophysical Journal Supplement, 181: 473 [Full Text (Link)] [10.1088/0067-0049/181/2/473]

    Bautista, M. A., C. Ballance, T. R. Gull, et al. H. Hartman, K. Lodders, M. Martínez, and M. B. Melendez. 2009. "Scandium and chromium in the strontium filament in the Homunculus of η Carinae." Monthly Notices of the Royal Astronomical Society, 393: 1503 [Full Text (Link)] [10.1111/j.1365-2966.2008.14246.x]

    Nielsen, K. E., and T. R. Gull. 2009. "Eta Carinae: an Astrophysical Laboratory." Physica Scripta, 134: 4002 [Full Text (Link)] [10.1088/0031-8949/2009/T134/014002]

    Gull, T. R., K. E. Nielsen, M. F. Corcoran, et al. T. I. Madura, S. P. Owocki, C. M. Russell, D. J. Hillier, K. Hamaguchi, G. V. Kober, K. Weis, O. Stahl, and A. T. Okazaki. 2009. "The extended interacting wind structure of Eta Carinae." Monthly Notices of the Royal Astronomical Society, 396: 1308 [Full Text (Link)] [10.1111/j.1365-2966.2009.14854.x]

    Gull, T. R. 2009. "The Variable 6307 Å Emission Line in the Spectrum of Eta Carinae: Blueshifted [S III] λ6313 from the Interacting Winds." The Publications of the Astronomical Society of the Pacific, 121: 1213 [Full Text (Link)] [10.1086/648537]

    Henley, D. B., M. F. Corcoran, J. M. Pittard, et al. I. R. Stevens, K. Hamaguchi, and T. R. Gull. 2008. "Chandra X‐Ray Grating Spectrometry of η Carinae near X‐Ray Minimum. I. Variability of the Sulfur and Silicon Emission Lines." The Astrophysical Journal, 680 (1): 705-727 [Full Text (Link)] [10.1086/587472]

    Hagen Bauer, W., T. R. Gull, and P. D. Bennett. 2008. "Spatial Extension in the Ultraviolet Spectrum of VV Cephei." The Astronomical Journal, 136: 1312 [Full Text (Link)] [10.1088/0004-6256/136/3/1312]

    Nielsen, K. E., M. F. Corcoran, T. R. Gull, et al. D. J. Hillier, K. Hamaguchi, S. Ivarsson, and D. J. Lindler. 2007. "η Carinae across the 2003.5 Minimum: Spectroscopic Evidence for Massive Binary Interactions." The Astrophysical Journal, 660 (1): 669-686 [Full Text (Link)] [10.1086/513006]

    Walborn, N. R., N. Smith, I. D. Howarth, et al. G. Vieira Kober, T. R. Gull, and J. A. Morse. 2007. "Interstellar Absorption-Line Evidence for High-Velocity Expanding Structures in the Carina Nebula Foreground." The Publications of the Astronomical Society of the Pacific, 119: 156 [Full Text (Link)] [10.1086/511756]

    Nielsen, K. E., S. Ivarsson, and T. R. Gull. 2007. "Eta Carinae across the 20035 Minimum: Deciphering the Spectrum toward Weigelt D." The Astrophysical Journal Supplement Series, 168: 289 [Full Text (Link)] [10.1086/509785]

    Weigelt, G., S. Kraus, T. Driebe, et al. R. G. Petrov, K. Hofmann, F. Millour, O. Chesneau, D. Schertl, F. Malbet, J. D. Hillier, T. R. Gull, K. Davidson, A. Domiciano de Souza, P. Antonelli, U. Beckmann, Y. Bresson, A. Chelli, M. Dugué, G. Duvert, S. Gennari, L. Glück, P. Kern, S. Lagarde, E. Le Coarer, F. Lisi, K. Perraut, P. Puget, F. Rantakyrö, S. Robbe-Dubois, A. Roussel, E. Tatulli, G. Zins, M. Accardo, B. Acke, K. Agabi, E. Altariba, B. Arezki, E. Aristidi, C. Baffa, J. Behrend, T. Blöcker, S. Bonhomme, S. Busoni, F. Cassaing, J. Clausse, J. Colin, C. Connot, A. Delboulbé, P. Feautrier, D. Ferruzzi, T. Forveille, E. Fossat, R. Foy, D. Fraix-Burnet, A. Gallardo, E. Giani, C. Gil, A. Glentzlin, M. Heiden, M. Heininger, O. Hernandez Utrera, D. Kamm, M. Kiekebusch, D. Le Contel, J. Le Contel, T. Lesourd, B. Lopez, M. Lopez, Y. Magnard, A. Marconi, G. Mars, G. Martinot-Lagarde, P. Mathias, P. Mège, J. Monin, D. Mouillet, D. Mourard, E. Nussbaum, K. Ohnaka, J. Pacheco, C. Perrier, Y. Rabbia, S. Rebattu, F. Reynaud, A. Richichi, A. Robini, M. Sacchettini, M. Schöller, W. Solscheid, A. Spang, P. Stee, P. Stefanini, M. Tallon, I. Tallon-Bosc, D. Tasso, L. Testi, F. Vakili, O. von der Lühe, J. Valtier, M. Vannier, N. Ventura, K. Weis, and M. Wittkowski. 2007. "Near-infrared interferometry of η Carinae with spectral resolutions of 1 500 and 12 000 using AMBER/VLTI." Astronomy and Astrophysics, 464: 87 [Full Text (Link)] [10.1051/0004-6361:20065577]

    Hamaguchi, K., M. F. Corcoran, T. R. Gull, et al. K. Ishibashi, J. M. Pittard, D. J. Hillier, A. Damineli, K. Davidson, K. E. Nielsen, and G. V. Kober. 2007. "X-Ray Spectral Variation of η Carinae through the 2003 X-Ray Minimum." The Astrophysical Journal, 663: 522 [Full Text (Link)] [10.1086/518101]

    Gull, T. R., G. V. Kober, and K. E. Nielsen. 2006. "Eta Carinae across the 20035 Minimum: The Character and Variability of the Ejecta Absorption in the Near-Ultraviolet." The Astrophysical Journal Supplement Series, 163: 173 [Full Text (Link)] [10.1086/500113]

    Fruchter, A. S., A. J. Levan, L. Strolger, et al. P. M. Vreeswijk, S. E. Thorsett, D. Bersier, I. Burud, J. M. Castro Cerón, A. J. Castro-Tirado, C. Conselice, T. Dahlen, H. C. Ferguson, J. P. Fynbo, P. M. Garnavich, R. A. Gibbons, J. Gorosabel, T. R. Gull, J. Hjorth, S. T. Holland, C. Kouveliotou, Z. Levay, M. Livio, M. R. Metzger, P. E. Nugent, L. Petro, E. Pian, J. E. Rhoads, A. G. Riess, K. C. Sahu, A. Smette, N. R. Tanvir, R. A. Wijers, and S. E. Woosley. 2006. "Long γ-ray bursts and core-collapse supernovae have different environments." Nature, 441: 463 [Full Text (Link)] [10.1038/nature04787]

    Bautista, M. A., H. Hartman, T. R. Gull, N. Smith, and K. Lodders. 2006. "[TiII] and [NiII] emission from the strontium filament of η Carinae." Monthly Notices of the Royal Astronomical Society, 370: 1991 [Full Text (Link)] [10.1111/j.1365-2966.2006.10624.x]

    Kraemer, S. B., D. M. Crenshaw, J. R. Gabel, et al. G. A. Kriss, H. Netzer, B. M. Peterson, I. M. George, T. R. Gull, J. B. Hutchings, R. F. Mushotzky, and T. J. Turner. 2006. "Simultaneous Ultraviolet and X‐Ray Observations of the Seyfert Galaxy NGC 4151. II. Physical Conditions in the UV Absorbers." The Astrophysical Journal Supplement Series, 167 (2): 161-176 [Full Text (Link)] [10.1086/508629]

    Hillier, D. J., T. R. Gull, K. E. Nielsen, et al. G. Sonneborn, R. C. Iping, N. Smith, M. F. Corcoran, A. Damineli, F. W. Hamann, J. C. Martin, and K. Weis. 2006. "The UV Scattering Halo of the Central Source Associated with η Carinae." The Astrophysical Journal, 642: 1098 [Full Text (Link)] [10.1086/501225]

    Kober, G. V., T. R. Gull, K. Nielsen, et al. F. Bruhweiler, K. Verner, O. Stahl, K. Weis, and D. Bomans. 2005. "Elemental and Molecular Relative Abundances in the Ejecta of Eta Carinae." Bulletin of the American Astronomical Society, 37: #114.09-.

    Grady, C., B. Woodgate, C. Bowers, et al. T. Gull, L. Sitko, and L. Sitko. 2005. "Coronagraphic Imaging of Pre-Main-Sequence Stars with the Hubble Space Telescope Space Telescope Imaging Spectrograph. I. The Herbig Ae Stars." The Astrophysical Journal, 630: 958 [ 10.1086/430731]

    Davidson, K., J. Martin, R. M. Humphreys, et al. K. Ishibashi, T. R. Gull, O. Stahl, K. Weis, D. J. Hillier, A. Damineli, M. Corcoran, and F. Hamann. 2005. "A Change in the Physical State of ? Carinae?" The Astronomical Journal, 129: 900 [Full Text (Link)] [10.1086/427132]

    Ruiz, J. R., D. M. Crenshaw, S. B. Kraemer, et al. G. A. Bower, T. R. Gull, J. B. Hutchings, M. E. Kaiser, and D. Weistrop. 2005. "Probing the Kinematics of the Narrow-Line Region in Seyfert Galaxies with Slitless Spectroscopy: Observational Results." The Astronomical Journal, 129: 73 [Full Text (Link)] [10.1086/426372]

    Gull, T. R., G. Vieira, F. C. Bruhweiler, et al. K. E. Nielsen, E. M. Verner, and A. Danks. 2005. "The Absorption Spectrum of High-Density Stellar Ejecta in the Line of Sight to η Carinae." The Astrophysical Journal, 620: 442 [Full Text (Link)] [10.1086/426885]

    Weis, K., O. Stahl, D. J. Bomans, et al. K. Davidson, T. R. Gull, and R. M. Humphreys. 2005. "VLT UVES Observations of the Balmer Line Variations of η Carinae during the 2003 Spectroscopic Event." The Astronomical Journal, 129: 1694 [Full Text (Link)] [10.1086/428005]

    Nielsen, K. E., T. R. Gull, and G. Vieira Kober. 2005. "The Ultraviolet Spectrum of η Carinae: Investigation of the Ejecta Absorption." The Astrophysical Journal Supplement Series, 157: 138 [Full Text (Link)] [10.1086/427437]

    Stahl, O., K. Weis, D. J. Bomans, et al. K. Davidson, T. R. Gull, and R. M. Humphreys. 2005. "A spectroscopic event of η Car viewed from different directions: The data and first results." Astronomy and Astrophysics, 435: 303 [Full Text (Link)] [10.1051/0004-6361:20042547]

    Johansson, S., T. R. Gull, H. Hartman, and V. S. Letokhov. 2005. "Metastable hydrogen absorption in ejecta close to η Carinae." Astronomy and Astrophysics, 435: 183 [Full Text (Link)] [10.1051/0004-6361:20041193]

    Verner, E. M., F. C. Bruhweiler, and T. R. Gull. 2005. "The Binarity of η Carinae Revealed from Photoionization Modeling of the Spectral Variability of the Weigelt Blobs B and D." The Astrophysical Journal, 624: 973 [Full Text (Link)] [10.1086/429400]

    Verner, E. M., F. C. Bruhweiler, K. E. Nielsen, et al. T. R. Gull, G. Vieira Kober, and M. F. Corcoran. 2005. "Discovery of CH and OH in the -513 km s-1 Ejecta of η Carinae." The Astrophysical Journal, 629: 1034 [Full Text (Link)] [10.1086/431917]

    Shibanov, Y. A., J. Sollerman, P. Lundqvist, T. Gull, and D. Lindler. 2005. "The near-UV pulse profile and spectrum of the pulsar PSR B0656+14." Astronomy and Astrophysics, 440: 693 [Full Text (Link)] [10.1051/0004-6361:20052987]

    Das, V., D. M. Crenshaw, J. B. Hutchings, et al. R. P. Deo, S. B. Kraemer, T. R. Gull, M. E. Kaiser, C. H. Nelson, and D. Weistrop. 2005. "Mapping the Kinematics of the Narrow-Line Region in the Seyfert Galaxy NGC 4151." The Astronomical Journal, 130: 945 [Full Text (Link)] [10.1086/432255]

    Bender, R., J. Kormendy, G. Bower, et al. R. Green, J. Thomas, A. C. Danks, T. Gull, J. B. Hutchings, C. L. Joseph, M. E. Kaiser, T. R. Lauer, C. H. Nelson, D. Richstone, D. Weistrop, and B. Woodgate. 2005. "HST STIS Spectroscopy of the Triple Nucleus of M31: Two Nested Disks in Keplerian Rotation around a Supermassive Black Hole." The Astrophysical Journal, 631: 280 [Full Text (Link)] [10.1086/432434]

    Kraemer, S. B., I. M. George, D. M. Crenshaw, et al. J. R. Gabel, T. J. Turner, T. R. Gull, J. B. Hutchings, G. A. Kriss, R. F. Mushotzky, H. Netzer, B. M. Peterson, and E. Behar. 2005. "Simultaneous Ultraviolet and X‐Ray Observations of Seyfert Galaxy NGC 4151. I. Physical Conditions in the X‐Ray Absorbers." The Astrophysical Journal, 633 (2): 693-705 [Full Text (Link)] [10.1086/466522]

    Grady, C. A., B. E. Woodgate, C. W. Bowers, et al. T. R. Gull, M. L. Sitko, W. J. Carpenter, D. K. Lynch, R. W. Russell, R. B. Perry, G. M. Williger, A. Roberge, J. Bouret, and M. Sahu. 2005. "Coronagraphic Imaging of Pre–Main‐Sequence Stars with the Hubble Space Telescope Space Telescope Imaging Spectrograph. I. The Herbig Ae Stars." The Astrophysical Journal, 630 (2): 958-975 [Full Text (Link)] [10.1086/430731]

    Iping, R. C., G. Sonneborn, T. R. Gull, D. L. Massa, and D. J. Hillier. 2005. "Detection of a Hot Binary Companion of η Carinae." The Astrophysical Journal, 633: L37 [Full Text (Link)] [10.1086/498268]

    Smith, N., J. A. Morse, T. R. Gull, et al. D. J. Hillier, R. D. Gehrz, N. R. Walborn, M. Bautista, N. R. Collins, M. F. Corcoran, A. Damineli, F. Hamann, H. Hartman, S. Johansson, O. Stahl, and K. Weis. 2004. "Kinematics and Ultraviolet to Infrared Morphology of the Inner Homunculus of η Carinae." The Astrophysical Journal, 605: 405 [Full Text (Link)] [10.1086/382185]

    Cohen, M., H. Van Winckel, H. E. Bond, and T. R. Gull. 2004. "Hubble Space Telescope Imaging of HD 44179, The Red Rectangle." The Astronomical Journal, 127: 2362 [Full Text (Link)] [10.1086/382902]

    Hartman, H., T. Gull, S. Johansson, N. Smith, and H. E. . 2004. "Identification of emission lines in the low-ionization strontium filament near Eta Carinae." Astronomy and Astrophysics, v419, p215-224 (2004), 419: 215 [Full Text (Link)] [10.1051/0004-6361:20035647]

    Smith, N., J. A. Morse, N. R. Collins, and T. R. Gull. 2004. "The Purple Haze of ? Carinae: Binary-induced Variability?" The Astrophysical Journal, 610: L105 [Full Text (Link)] [10.1086/423341]

    Verner, E., F. Bruhweiler, D. Verner, et al. S. Johansson, T. Kallman, and T. Gull. 2004. "Fe II Diagnostic Tools for Quasars." The Astrophysical Journal, 611: 780 [Full Text (Link)] [10.1086/422303]

    Corcoran, M. F., K. Hamaguchi, T. Gull, et al. K. Davidson, R. Petre, D. J. Hillier, N. Smith, A. Damineli, J. A. Morse, N. R. Walborn, E. Verner, N. Collins, S. White, J. M. Pittard, K. Weis, D. Bomans, and Y. Butt. 2004. "Waiting in the Wings: Reflected X-Ray Emission from the Homunculus Nebula." The Astrophysical Journal, 613: 381 [Full Text (Link)] [10.1086/423024]

    Chu, Y., R. A. Gruendl, R. M. Williams, T. R. Gull, and K. Werner. 2004. "The Nebular Environment and Enigmatic Hard X-Ray Emission of the Hot DO White Dwarf KPD 0005+5106." The Astronomical Journal, 128: 2357 [Full Text (Link)] [10.1086/424942]

    Proffitt, C. R., K. Sahu, M. Livio, et al. J. Krist, D. Calzetti, R. Gilliland, C. A. Grady, D. Lindler, B. E. Woodgate, S. R. Heap, M. Clampin, T. R. Gull, and C. M. Lisse. 2004. "Limits on the Optical Brightness of the ε Eridani Dust Ring." The Astrophysical Journal, 612: 481 [Full Text (Link)] [10.1086/422549]

    Hartman, H., A. Derkatch, M. P. Donnelly, et al. T. Gull, A. Hibbert, S. Johansson, H. Lundberg, S. Mannervik, L. Norlin, D. Rostohar, P. Royen, and P. Schef. 2003. "The FERRUM Project: Experimental transition probabilities of [Fe II] and astrophysical applications." Astronomy and Astrophysics, v397, p1143-1149 (2003), 397: 1143 [Full Text (Link)] [10.1051/0004-6361:20021557]

    Smith, N., K. Davidson, T. R. Gull, K. Ishibashi, and D. J. Hillier. 2003. "Latitude-dependent Effects in the Stellar Wind of η Carinae." The Astrophysical Journal, 586: 432 [Full Text (Link)] [10.1086/367641]

    Verner, E., F. Bruhweiler, D. Verner, S. Johansson, and T. Gull. 2003. "Revisited Abundance Diagnostics in Quasars: Fe II/Mg II Ratios." The Astrophysical Journal, 592: L59 [Full Text (Link)] [10.1086/377571]

    Grady, C. A., C. R. Proffitt, E. Malumuth, et al. B. E. Woodgate, T. R. Gull, C. W. Bowers, S. R. Heap, R. A. Kimble, D. Lindler, P. Plait, and A. Weinberger. 2003. "Coronagraphic Imaging with the Hubble Space Telescope and the Space Telescope Imaging Spectrograph." The Publications of the Astronomical Society of the Pacific, 115: 1036 [Full Text (Link)] [10.1086/377083]

    Malumuth, E. M., R. S. Hill, T. Gull, et al. B. E. Woodgate, C. W. Bowers, R. A. Kimble, D. Lindler, P. Plait, and M. Blouke. 2003. "Removing the Fringes from Space Telescope Imaging Spectrograph Slitless Spectra." The Publications of the Astronomical Society of the Pacific, 115: 218 [Full Text (Link)] [10.1086/345913]

    Ishibashi, K., T. R. Gull, K. Davidson, et al. N. Smith, T. Lanz, D. J. Lindler, K. Feggans, E. M. Verner, B. E. Woodgate, R. A. Kimble, C. W. Bowers, S. B. Kraemer, S. R. Heap, A. C. Danks, S. P. Maran, C. L. Joseph, M. E. Kaiser, J. L. Linsky, F. Roesler, and D. Weistrop. 2003. "Discovery of a Little Homunculus within the Homunculus Nebula of η Carinae." The Astronomical Journal, 125: 3222 [Full Text (Link)] [10.1086/375306]

    Corcoran, M., J. H. Swank, K. Ishibashi, et al. T. Gull, R. Humphreys, A. Damineli, N. Walborn, D. J. Hillier, K. Davidson, S. M. White, R. Petre, J. Pittard, Y. Butt, and K. Verner. 2002. "Recent X-ray Variability of Eta Car Approaching The X-ray Eclipse." Bulletin of the American Astronomical Society, 34: 1184-.

    Bautista, M. A., T. R. Gull, K. Ishibashi, H. Hartman, and K. Davidson. 2002. "Excitation of Srii lines in Eta Carinae." Monthly Notices of the Royal Astronomical Society, 331: 875 [Full Text (Link)] [10.1046/j.1365-8711.2002.05250.x]

    Van Winckel, H., M. Cohen, and T. R. Gull. 2002. "The ERE of the ``Red Rectangle" revisited." Astronomy and Astrophysics, v390, p147-154 (2002), 390: 147 [Full Text (Link)] [10.1051/0004-6361:20020623]

    Hutchings, J. B., D. M. Crenshaw, S. B. Kraemer, et al. J. R. Gabel, M. E. Kaiser, D. Weistrop, and T. R. Gull. 2002. "Balmer and He I Absorption in the Nuclear Spectrum of NGC 4151." The Astronomical Journal, 124: 2543 [Full Text (Link)] [10.1086/344080]

    King, N. L., A. Nota, J. R. Walsh, et al. N. Panagia, T. R. Gull, A. Pasquali, M. Clampin, and L. E. Bergeron. 2002. "A Hubble Space Telescope Polarization Study of Dust in the η Carinae Homunculus." The Astrophysical Journal, 581: 285 [Full Text (Link)] [10.1086/344168]

    Verner, E. M., T. R. Gull, F. C. Bruhweiler, et al. S. Johansson, K. Ishibashi, and K. Davidson. 2002. "The Origin of Fe II and [Fe II] Emission Lines in the 4000-10000 Å Range in the BD Weigelt Blobs of η Carinae." The Astrophysical Journal, 581: 1154 [Full Text (Link)] [10.1086/344443]

    Tripp, T. M., E. B. Jenkins, G. M. Williger, et al. S. R. Heap, C. W. Bowers, A. C. Danks, R. Davé, R. F. Green, T. R. Gull, C. L. Joseph, M. E. Kaiser, D. J. Lindler, R. J. Weymann, and B. E. Woodgate. 2002. "The Heavy-Element Enrichment of Lyα Clouds in the Virgo Supercluster." The Astrophysical Journal, 575: 697 [Full Text (Link)] [10.1086/341338]

    Davidson, K., N. Smith, T. R. Gull, K. Ishibashi, and D. J. Hillier. 2001. "The Shape and Orientation of the Homunculus Nebula Based on Spectroscopic Velocities." The Astronomical Journal, 121: 1569 [Full Text (Link)] [10.1086/319419]

    Bower, G. A., R. F. Green, R. Bender, et al. K. Gebhardt, T. R. Lauer, J. Magorrian, D. O. Richstone, A. Danks, T. Gull, J. Hutchings, C. Joseph, M. E. Kaiser, D. Weistrop, B. Woodgate, C. Nelson, and E. M. Malumuth. 2001. "Evidence of a Supermassive Black Hole in the Galaxy NGC 1023 from the Nuclear Stellar Dynamics." The Astrophysical Journal, 550: 75 [Full Text (Link)] [10.1086/319730]

    Joseph, C. L., D. Merritt, R. Olling, et al. M. Valluri, R. Bender, G. Bower, A. Danks, T. Gull, J. Hutchings, M. E. Kaiser, S. Maran, D. Weistrop, B. Woodgate, E. Malumuth, C. Nelson, P. Plait, and D. Lindler. 2001. "The Nuclear Dynamics of M32. I. Data and Stellar Kinematics." The Astrophysical Journal, 550 (2): 668-690 [Full Text (Link)] [10.1086/319781]

    Kraemer, S. B., D. M. Crenshaw, J. B. Hutchings, et al. I. M. George, A. C. Danks, T. R. Gull, M. E. Kaiser, C. H. Nelson, D. Weistrop, and G. L. Vieira. 2001. "Space Telescope Imaging Spectrograph Echelle Observations of the Seyfert Galaxy NGC 4151: Physical Conditions in the Ultraviolet Absorbers." The Astrophysical Journal, 551: 671 [Full Text (Link)] [10.1086/320244]

    Gull, T. R. 2001. "η Carinae and Other Mysterious Stars: Hidden Opportunities for Emission Spectroscopy." The Publications of the Astronomical Society of the Pacific, 113: 512 [Full Text (Link)] [10.1086/319539]

    Hillier, D. J., K. Davidson, K. Ishibashi, and T. R. Gull. 2001. "On the Nature of the Central Source in η Carinae." The Astrophysical Journal, 553: 837 [Full Text (Link)] [10.1086/320948]

    Smette, A., A. S. Fruchter, T. R. Gull, et al. K. C. Sahu, L. Petro, H. Ferguson, J. Rhoads, D. J. Lindler, R. Gibbons, D. W. Hogg, C. Kouveliotou, M. Livio, D. Macchetto, M. R. Metzger, H. Pedersen, E. Pian, S. E. Thorsett, R. A. Wijers, J. P. Fynbo, J. Gorosabel, J. Hjorth, B. L. Jensen, A. Levine, D. A. Smith, T. Cline, K. Hurley, and J. Trombka. 2001. "Hubble Space Telescope STIS Observations of GRB 000301C: CCD Imaging and Near-Ultraviolet MAMA Spectroscopy." The Astrophysical Journal, 556: 70 [Full Text (Link)] [10.1086/321585]

    Zethson, T., T. R. Gull, H. Hartman, et al. S. Johansson, K. Davidson, and K. Ishibashi. 2001. "Sr II and [Sr II] Emission in the Ejecta of η Carinae." The Astronomical Journal, 122: 322 [Full Text (Link)] [10.1086/321119]

    Gebhardt, K., T. R. Lauer, J. Kormendy, et al. J. Pinkney, G. A. Bower, R. Green, T. Gull, J. B. Hutchings, M. E. Kaiser, C. H. Nelson, D. Richstone, and D. Weistrop. 2001. "M33: A Galaxy with No Supermassive Black Hole." The Astronomical Journal, 122: 2469 [Full Text (Link)] [10.1086/323481]

    Ruiz, J. R., D. M. Crenshaw, S. B. Kraemer, et al. G. A. Bower, T. R. Gull, J. B. Hutchings, M. E. Kaiser, and D. Weistrop. 2001. "Kinematics of the Narrow-Line Region in the Seyfert 2 Galaxy Markarian 3." The Astronomical Journal, 122: 2961 [Full Text (Link)] [10.1086/323917]

    Grady, C. A., E. F. Polomski, T. Henning, et al. B. Stecklum, B. E. Woodgate, C. M. Telesco, R. K. Piña, T. R. Gull, A. Boggess, C. W. Bowers, F. C. Bruhweiler, M. Clampin, A. C. Danks, R. F. Green, S. R. Heap, J. B. Hutchings, E. B. Jenkins, C. Joseph, M. E. Kaiser, R. A. Kimble, S. Kraemer, D. Lindler, J. L. Linsky, S. P. Maran, H. W. Moos, P. Plait, F. Roesler, J. G. Timothy, and D. Weistrop. 2001. "The Disk and Environment of the Herbig Be Star HD 100546." The Astronomical Journal, 122: 3396 [Full Text (Link)] [10.1086/324447]

    Kaiser, M. E., L. D. Bradley, J. B. Hutchings, et al. D. M. Crenshaw, T. R. Gull, S. B. Kraemer, C. H. Nelson, J. Ruiz, and D. Weistrop. 2000. "The Resolved Narrow-Line Region in NGC 4151." The Astrophysical Journal, 528: 260 [Full Text (Link)] [10.1086/308143]

    Nelson, C. H., D. Weistrop, J. B. Hutchings, et al. D. M. Crenshaw, T. R. Gull, M. E. Kaiser, S. B. Kraemer, and D. Lindler. 2000. "Space Telescope Imaging Spectrograph Long-Slit Spectroscopy of the Narrow-Line Region of NGC 4151 I Kinematics and Emission-Line Ratios." The Astrophysical Journal, 531: 257 [Full Text (Link)] [10.1086/308456]

    Davidson, K., K. Ishibashi, T. R. Gull, R. M. Humphreys, and N. Smith. 2000. "η Carinae: Testing a Binary Orbit Model with the Hubble Space Telescope/Space Telescope Imaging Spectrograph." The Astrophysical Journal, 530: L107 [Full Text (Link)] [10.1086/312502]

    Kraemer, S. B., D. M. Crenshaw, J. B. Hutchings, et al. T. R. Gull, M. E. Kaiser, C. H. Nelson, and D. Weistrop. 2000. "Space Telescope Imaging Spectrograph Long-Slit Spectroscopy of the Narrow-Line Region of NGC 4151 II Physical Conditions along Position Angle 221 deg." The Astrophysical Journal, 531: 278 [Full Text (Link)] [10.1086/308457]

    Bower, G. A., R. F. Green, A. C. Quillen, et al. A. Danks, T. Gull, J. Hutchings, C. Joseph, M. E. Kaiser, D. Weistrop, B. Woodgate, E. M. Malumuth, and C. Nelson. 2000. "The Ionization Source in the Nucleus of M84." The Astrophysical Journal, 534: 189 [Full Text (Link)] [10.1086/308741]

    Johansson, S., T. Zethson, H. Hartman, et al. J. O. Ekberg, K. Ishibashi, K. Davidson, and T. Gull. 2000. "New forbidden and fluorescent Fe III lines identified in HST spectra of eta Carinae." Astronomy and Astrophysics, v361, p977-981 (2000), 361: 977 [Full Text (Link)]

    Crenshaw, D. M., S. B. Kraemer, J. B. Hutchings, et al. L. D. Bradley, T. R. Gull, M. E. Kaiser, C. H. Nelson, J. R. Ruiz, and D. Weistrop. 2000. "A Kinematic Model for the Narrow-Line Region in NGC 4151." The Astronomical Journal, 120: 1731 [Full Text (Link)] [10.1086/301574]

    Crenshaw, D. M., S. B. Kraemer, J. B. Hutchings, et al. A. C. Danks, T. R. Gull, M. E. Kaiser, C. H. Nelson, and D. Weistrop. 2000. "Space Telescope Imaging Spectrograph Echelle Observations of NGC 4151: Variable Ionization of the Intrinsic UV Absorbers." The Astrophysical Journal, 545: L27 [Full Text (Link)] [10.1086/317333]

    Sollerman, J., P. Lundqvist, D. Lindler, et al. R. A. Chevalier, C. Fransson, T. R. Gull, C. S. Pun, and G. Sonneborn. 2000. "Observations of the Crab Nebula and Its Pulsar in the Far-Ultraviolet and in the Optical." The Astrophysical Journal, 537: 861 [Full Text (Link)] [10.1086/309062]

    Maran, S. P., G. Sonneborn, C. S. Pun, et al. P. Lundqvist, R. C. Iping, and T. R. Gull. 2000. "Physical Conditions in Circumstellar Gas Surrounding SN 1987A 12 Years after Outburst." The Astrophysical Journal, 545: 390 [Full Text (Link)] [10.1086/317809]

    Non-Refereed

    Grady, C. A., B. E. Woodgate, C. W. Bowers, et al. T. R. Gull, M. L. Sitko, and Et al.. 2005. "Coronagraphic Imaging of Pre-Main-Sequence Stars with the Hubble Space Telescope Space Telescope Imaging Spectrograph I The Herbig Ae Stars ." The Astrophysical Journal 630: 958 [10.1086/43073]

    Brief Bio

    Assistant Astronomer, University of Chicago, Yerkes Observatory 1970-1972
    Assistant Astronomer, Kitt Peak National Observatory, Tucson, AZ 1972-1975
    Principal Engineer, Lockheed Electronics, Houston, TX 1975-1977
    Astronomer, GSFC 1977-Present
    Associate Chief, Laboratory for Astronomy and Solar Physics 1983-1993
    Mission Scientist, Astro-1, 1982-1992
    Deputy Principal Investigator, Space Telescope Imaging Spectrograph, 1984-2009

    Publications

    Refereed

    Weigelt, G., K.-H. Hofmann, D. Schertl, et al. N. Clementel, M. F. Corcoran, A. Damineli, W.-J. de Wit, R. Grellmann, J. Groh, S. Guieu, T. Gull, M. Heininger, D. J. Hillier, C. A. Hummel, S. Kraus, T. Madura, A. Mehner, A. Mérand, F. Millour, A. F. Moffat, K. Ohnaka, F. Patru, R. G. Petrov, S. Rengaswamy, N. D. Richardson, T. Rivinius, M. Schöller, M. Teodoro, and M. Wittkowski. 2016. "VLTI-AMBER velocity-resolved aperture-synthesis imaging of η Carinae with a spectral resolution of 12 000." Astronomy & Astrophysics (In Press) 594 A106 [10.1051/0004-6361/201628832]

    Madura, T. I., T. R. Gull, S. P. Owocki, et al. J. H. Groh, A. T. Okazaki, and C. M. Russell. 2012. "Constraining the absolute orientation of η Carinae’s binary orbit: a 3D dynamical model for the broad [Fe iii] emission★." Monthly Notices of the Royal Astronomical Society 420 (3): 2064-2086 [10.1111/j.1365-2966.2011.20165.x]

    Madura, T. I., T. R. Gull, S. P. Owocki, A. T. Okazaki, and C. M. Russell. 2011. "Constraining the Properties of the Eta Carinae System via 3-D SPH Models of Space-Based Observations: The Absolute Orientation of the Binary Orbit." SociŽtŽ Royale des Sciences de Li?ge, Bulletin, vol 80, p 694-698 (Proceedings of the 39th Li?ge Astrophysical Colloquium, held in Li?ge 12-16 July 2010, edited by G Rauw, M De Becker, Y NazŽ, J-M Vreux, P Williams) 80 694 [Full Text (Link)]

    Bautista, M. A., M. MelŽndez, H. Hartman, T. R. Gull, and K. Lodders. 2011. "The abundance of iron-peak elements and the dust composition in _ Carinae: manganese." Monthly Notices of the Royal Astronomical Society 410 2643 [Full Text (Link)] [10.1111/j.1365-2966.2010.17642.x]

    Oegerle, W. R., L. Feinberg, L. Purves, et al. T. Hyde, H. Thronson, J. Townsend, M. Postman, M. Bolcar, J. Budinoff, B. Dean, M. Clampin, D. Ebbets, Q. Gong, T. Gull, J. Howard, A. Jones, R. Lyon, B. Pasquale, C. Perrygo, S. Smith, P. Thompson, and B. Woodgate. 2010. "ATLAST-9.2: A Deployable Large Aperture UVOIR Space Telescope." American Astronomical Society, AAS Meeting #215, #48002; Bulletin of the American Astronomical Society, Vol 42, p569 215 569 [Full Text (Link)]

    Oegerle, W. R., L. D. Feinberg, L. R. Purves, et al. T. T. Hyde, H. A. Thronson, J. A. Townsend, M. Postman, M. R. Bolcar, J. G. Budinoff, B. H. Dean, M. C. Clampin, D. C. Ebbets, Q. Gong, T. R. Gull, J. M. Howard, A. L. Jones, R. G. Lyon, B. A. Pasquale, C. Perrygo, J. S. Smith, P. L. Thompson, and B. E. Woodgate. 2010. "ATLAST-9.2m: a large-aperture deployable space telescope." Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave Edited by Oschmann, Jacobus M, Jr; Clampin, Mark C; MacEwen, Howard A Proceedings of the SPIE 7731 81 [Full Text (Link)] [10.1117/12.857622]

    Groh, J. H., K. E. Nielsen, A. Damineli, et al. T. R. Gull, T. I. Madura, D. J. Hillier, M. Teodoro, T. Driebe, G. Weigelt, H. Hartman, F. Kerber, A. T. Okazaki, S. P. Owocki, F. Millour, K. Murakawa, S. Kraus, K. Hofmann, and D. Schertl. 2010. "Detection of high-velocity material from the wind-wind collision zone of Eta Carinae across the 2009.0 periastron passage." Astronomy and Astrophysics 517 (A9): 17pp [10.1051/0004-6361/200913937]

    Bruhweiler, F. C., R. Freire Ferrero, M. O. Bourdin, and T. R. Gull. 2010. "The Young Interstellar Bubble Within the Rosette Nebula." The Astrophysical Journal 719 1872 [Full Text (Link)] [10.1088/0004-637X/719/2/1872]

    Postman, M., V. Argabright, B. Arnold, et al. D. Aronstein, P. Atcheson, M. Blouke, T. Brown, D. Calzetti, W. Cash, M. Clampin, D. Content, D. Dailey, R. Danner, R. Doxsey, D. Ebbets, P. Eisenhardt, L. Feinberg, A. Fruchter, M. Giavalisco, T. Glassman, Q. Gong, J. Green, J. Grunsfeld, T. Gull, G. Hickey, R. Hopkins, J. Hraba, T. Hyde, I. Jordan, J. Kasdin, S. Kendrick, S. Kilston, A. Koekemoer, B. Korechoff, J. Krist, J. Mather, C. Lillie, A. Lo, R. Lyon, P. McCullough, G. Mosier, M. Mountain, B. Oegerle, B. Pasquale, L. Purves, C. Penera, R. Polidan, D. Redding, K. Sahu, B. Saif, K. Sembach, M. Shull, S. Smith, G. Sonneborn, D. Spergel, P. Stahl, K. Stapelfeldt, H. Thronson, G. Thronton, J. Townsend, W. Traub, S. Unwin, J. Valenti, R. Vanderbei, M. Werner, R. Wesenberg, J. Wiseman, and B. Woodgate. 2009. "Advanced Technology Large-Aperture Space Telescope (ATLAST): A Technology Roadmap for the Next Decade." eprint arXiv:09040941 0904 941 [Full Text (Link)]

    Nielsen, K. E., G. V. Kober, K. Weis, et al. T. R. Gull, O. Stahl, and D. J. Bomans. 2009. "Eta Carinae Across the 20035 Minimum: Analysis in the Visible and Near-Infrared Spectral Region." The Astrophysical Journal Supplement 181 473 [Full Text (Link)] [10.1088/0067-0049/181/2/473]

    Bautista, M. A., C. Ballance, T. R. Gull, et al. H. Hartman, K. Lodders, M. Martínez, and M. B. Melendez. 2009. "Scandium and chromium in the strontium filament in the Homunculus of η Carinae." Monthly Notices of the Royal Astronomical Society 393 1503 [Full Text (Link)] [10.1111/j.1365-2966.2008.14246.x]

    Nielsen, K. E., and T. R. Gull. 2009. "Eta Carinae: an Astrophysical Laboratory." Physica Scripta 134 4002 [Full Text (Link)] [10.1088/0031-8949/2009/T134/014002]

    Gull, T. R., K. E. Nielsen, M. F. Corcoran, et al. T. I. Madura, S. P. Owocki, C. M. Russell, D. J. Hillier, K. Hamaguchi, G. V. Kober, K. Weis, O. Stahl, and A. T. Okazaki. 2009. "The extended interacting wind structure of Eta Carinae." Monthly Notices of the Royal Astronomical Society 396 1308 [Full Text (Link)] [10.1111/j.1365-2966.2009.14854.x]

    Gull, T. R. 2009. "The Variable 6307 Å Emission Line in the Spectrum of Eta Carinae: Blueshifted [S III] λ6313 from the Interacting Winds." The Publications of the Astronomical Society of the Pacific 121 1213 [Full Text (Link)] [10.1086/648537]

    Henley, D. B., M. F. Corcoran, J. M. Pittard, et al. I. R. Stevens, K. Hamaguchi, and T. R. Gull. 2008. "Chandra X‐Ray Grating Spectrometry of η Carinae near X‐Ray Minimum. I. Variability of the Sulfur and Silicon Emission Lines." The Astrophysical Journal 680 (1): 705-727 [Full Text (Link)] [10.1086/587472]

    Hagen Bauer, W., T. R. Gull, and P. D. Bennett. 2008. "Spatial Extension in the Ultraviolet Spectrum of VV Cephei." The Astronomical Journal 136 1312 [Full Text (Link)] [10.1088/0004-6256/136/3/1312]

    Nielsen, K. E., M. F. Corcoran, T. R. Gull, et al. D. J. Hillier, K. Hamaguchi, S. Ivarsson, and D. J. Lindler. 2007. "η Carinae across the 2003.5 Minimum: Spectroscopic Evidence for Massive Binary Interactions." The Astrophysical Journal 660 (1): 669-686 [Full Text (Link)] [10.1086/513006]

    Walborn, N. R., N. Smith, I. D. Howarth, et al. G. Vieira Kober, T. R. Gull, and J. A. Morse. 2007. "Interstellar Absorption-Line Evidence for High-Velocity Expanding Structures in the Carina Nebula Foreground." The Publications of the Astronomical Society of the Pacific 119 156 [Full Text (Link)] [10.1086/511756]

    Nielsen, K. E., S. Ivarsson, and T. R. Gull. 2007. "Eta Carinae across the 20035 Minimum: Deciphering the Spectrum toward Weigelt D." The Astrophysical Journal Supplement Series 168 289 [Full Text (Link)] [10.1086/509785]

    Weigelt, G., S. Kraus, T. Driebe, et al. R. G. Petrov, K. Hofmann, F. Millour, O. Chesneau, D. Schertl, F. Malbet, J. D. Hillier, T. R. Gull, K. Davidson, A. Domiciano de Souza, P. Antonelli, U. Beckmann, Y. Bresson, A. Chelli, M. Dugué, G. Duvert, S. Gennari, L. Glück, P. Kern, S. Lagarde, E. Le Coarer, F. Lisi, K. Perraut, P. Puget, F. Rantakyrö, S. Robbe-Dubois, A. Roussel, E. Tatulli, G. Zins, M. Accardo, B. Acke, K. Agabi, E. Altariba, B. Arezki, E. Aristidi, C. Baffa, J. Behrend, T. Blöcker, S. Bonhomme, S. Busoni, F. Cassaing, J. Clausse, J. Colin, C. Connot, A. Delboulbé, P. Feautrier, D. Ferruzzi, T. Forveille, E. Fossat, R. Foy, D. Fraix-Burnet, A. Gallardo, E. Giani, C. Gil, A. Glentzlin, M. Heiden, M. Heininger, O. Hernandez Utrera, D. Kamm, M. Kiekebusch, D. Le Contel, J. Le Contel, T. Lesourd, B. Lopez, M. Lopez, Y. Magnard, A. Marconi, G. Mars, G. Martinot-Lagarde, P. Mathias, P. Mège, J. Monin, D. Mouillet, D. Mourard, E. Nussbaum, K. Ohnaka, J. Pacheco, C. Perrier, Y. Rabbia, S. Rebattu, F. Reynaud, A. Richichi, A. Robini, M. Sacchettini, M. Schöller, W. Solscheid, A. Spang, P. Stee, P. Stefanini, M. Tallon, I. Tallon-Bosc, D. Tasso, L. Testi, F. Vakili, O. von der Lühe, J. Valtier, M. Vannier, N. Ventura, K. Weis, and M. Wittkowski. 2007. "Near-infrared interferometry of η Carinae with spectral resolutions of 1 500 and 12 000 using AMBER/VLTI." Astronomy and Astrophysics 464 87 [Full Text (Link)] [10.1051/0004-6361:20065577]

    Hamaguchi, K., M. F. Corcoran, T. R. Gull, et al. K. Ishibashi, J. M. Pittard, D. J. Hillier, A. Damineli, K. Davidson, K. E. Nielsen, and G. V. Kober. 2007. "X-Ray Spectral Variation of η Carinae through the 2003 X-Ray Minimum." The Astrophysical Journal 663 522 [Full Text (Link)] [10.1086/518101]

    Gull, T. R., G. V. Kober, and K. E. Nielsen. 2006. "Eta Carinae across the 20035 Minimum: The Character and Variability of the Ejecta Absorption in the Near-Ultraviolet." The Astrophysical Journal Supplement Series 163 173 [Full Text (Link)] [10.1086/500113]

    Fruchter, A. S., A. J. Levan, L. Strolger, et al. P. M. Vreeswijk, S. E. Thorsett, D. Bersier, I. Burud, J. M. Castro Cerón, A. J. Castro-Tirado, C. Conselice, T. Dahlen, H. C. Ferguson, J. P. Fynbo, P. M. Garnavich, R. A. Gibbons, J. Gorosabel, T. R. Gull, J. Hjorth, S. T. Holland, C. Kouveliotou, Z. Levay, M. Livio, M. R. Metzger, P. E. Nugent, L. Petro, E. Pian, J. E. Rhoads, A. G. Riess, K. C. Sahu, A. Smette, N. R. Tanvir, R. A. Wijers, and S. E. Woosley. 2006. "Long γ-ray bursts and core-collapse supernovae have different environments." Nature 441 463 [Full Text (Link)] [10.1038/nature04787]

    Bautista, M. A., H. Hartman, T. R. Gull, N. Smith, and K. Lodders. 2006. "[TiII] and [NiII] emission from the strontium filament of η Carinae." Monthly Notices of the Royal Astronomical Society 370 1991 [Full Text (Link)] [10.1111/j.1365-2966.2006.10624.x]

    Kraemer, S. B., D. M. Crenshaw, J. R. Gabel, et al. G. A. Kriss, H. Netzer, B. M. Peterson, I. M. George, T. R. Gull, J. B. Hutchings, R. F. Mushotzky, and T. J. Turner. 2006. "Simultaneous Ultraviolet and X‐Ray Observations of the Seyfert Galaxy NGC 4151. II. Physical Conditions in the UV Absorbers." The Astrophysical Journal Supplement Series 167 (2): 161-176 [Full Text (Link)] [10.1086/508629]

    Hillier, D. J., T. R. Gull, K. E. Nielsen, et al. G. Sonneborn, R. C. Iping, N. Smith, M. F. Corcoran, A. Damineli, F. W. Hamann, J. C. Martin, and K. Weis. 2006. "The UV Scattering Halo of the Central Source Associated with η Carinae." The Astrophysical Journal 642 1098 [Full Text (Link)] [10.1086/501225]

    Kober, G. V., T. R. Gull, K. Nielsen, et al. F. Bruhweiler, K. Verner, O. Stahl, K. Weis, and D. Bomans. 2005. "Elemental and Molecular Relative Abundances in the Ejecta of Eta Carinae." Bulletin of the American Astronomical Society 37 #114.09-

    Grady, C., B. Woodgate, C. Bowers, et al. T. Gull, L. Sitko, and L. Sitko. 2005. "Coronagraphic Imaging of Pre-Main-Sequence Stars with the Hubble Space Telescope Space Telescope Imaging Spectrograph. I. The Herbig Ae Stars." The Astrophysical Journal 630 958 [ 10.1086/430731]

    Davidson, K., J. Martin, R. M. Humphreys, et al. K. Ishibashi, T. R. Gull, O. Stahl, K. Weis, D. J. Hillier, A. Damineli, M. Corcoran, and F. Hamann. 2005. "A Change in the Physical State of ? Carinae?" The Astronomical Journal 129 900 [Full Text (Link)] [10.1086/427132]

    Ruiz, J. R., D. M. Crenshaw, S. B. Kraemer, et al. G. A. Bower, T. R. Gull, J. B. Hutchings, M. E. Kaiser, and D. Weistrop. 2005. "Probing the Kinematics of the Narrow-Line Region in Seyfert Galaxies with Slitless Spectroscopy: Observational Results." The Astronomical Journal 129 73 [Full Text (Link)] [10.1086/426372]

    Gull, T. R., G. Vieira, F. C. Bruhweiler, et al. K. E. Nielsen, E. M. Verner, and A. Danks. 2005. "The Absorption Spectrum of High-Density Stellar Ejecta in the Line of Sight to η Carinae." The Astrophysical Journal 620 442 [Full Text (Link)] [10.1086/426885]

    Weis, K., O. Stahl, D. J. Bomans, et al. K. Davidson, T. R. Gull, and R. M. Humphreys. 2005. "VLT UVES Observations of the Balmer Line Variations of η Carinae during the 2003 Spectroscopic Event." The Astronomical Journal 129 1694 [Full Text (Link)] [10.1086/428005]

    Nielsen, K. E., T. R. Gull, and G. Vieira Kober. 2005. "The Ultraviolet Spectrum of η Carinae: Investigation of the Ejecta Absorption." The Astrophysical Journal Supplement Series 157 138 [Full Text (Link)] [10.1086/427437]

    Stahl, O., K. Weis, D. J. Bomans, et al. K. Davidson, T. R. Gull, and R. M. Humphreys. 2005. "A spectroscopic event of η Car viewed from different directions: The data and first results." Astronomy and Astrophysics 435 303 [Full Text (Link)] [10.1051/0004-6361:20042547]

    Johansson, S., T. R. Gull, H. Hartman, and V. S. Letokhov. 2005. "Metastable hydrogen absorption in ejecta close to η Carinae." Astronomy and Astrophysics 435 183 [Full Text (Link)] [10.1051/0004-6361:20041193]

    Verner, E. M., F. C. Bruhweiler, and T. R. Gull. 2005. "The Binarity of η Carinae Revealed from Photoionization Modeling of the Spectral Variability of the Weigelt Blobs B and D." The Astrophysical Journal 624 973 [Full Text (Link)] [10.1086/429400]

    Verner, E. M., F. C. Bruhweiler, K. E. Nielsen, et al. T. R. Gull, G. Vieira Kober, and M. F. Corcoran. 2005. "Discovery of CH and OH in the -513 km s-1 Ejecta of η Carinae." The Astrophysical Journal 629 1034 [Full Text (Link)] [10.1086/431917]

    Shibanov, Y. A., J. Sollerman, P. Lundqvist, T. Gull, and D. Lindler. 2005. "The near-UV pulse profile and spectrum of the pulsar PSR B0656+14." Astronomy and Astrophysics 440 693 [Full Text (Link)] [10.1051/0004-6361:20052987]

    Das, V., D. M. Crenshaw, J. B. Hutchings, et al. R. P. Deo, S. B. Kraemer, T. R. Gull, M. E. Kaiser, C. H. Nelson, and D. Weistrop. 2005. "Mapping the Kinematics of the Narrow-Line Region in the Seyfert Galaxy NGC 4151." The Astronomical Journal 130 945 [Full Text (Link)] [10.1086/432255]

    Bender, R., J. Kormendy, G. Bower, et al. R. Green, J. Thomas, A. C. Danks, T. Gull, J. B. Hutchings, C. L. Joseph, M. E. Kaiser, T. R. Lauer, C. H. Nelson, D. Richstone, D. Weistrop, and B. Woodgate. 2005. "HST STIS Spectroscopy of the Triple Nucleus of M31: Two Nested Disks in Keplerian Rotation around a Supermassive Black Hole." The Astrophysical Journal 631 280 [Full Text (Link)] [10.1086/432434]

    Kraemer, S. B., I. M. George, D. M. Crenshaw, et al. J. R. Gabel, T. J. Turner, T. R. Gull, J. B. Hutchings, G. A. Kriss, R. F. Mushotzky, H. Netzer, B. M. Peterson, and E. Behar. 2005. "Simultaneous Ultraviolet and X‐Ray Observations of Seyfert Galaxy NGC 4151. I. Physical Conditions in the X‐Ray Absorbers." The Astrophysical Journal 633 (2): 693-705 [Full Text (Link)] [10.1086/466522]

    Grady, C. A., B. E. Woodgate, C. W. Bowers, et al. T. R. Gull, M. L. Sitko, W. J. Carpenter, D. K. Lynch, R. W. Russell, R. B. Perry, G. M. Williger, A. Roberge, J. Bouret, and M. Sahu. 2005. "Coronagraphic Imaging of Pre–Main‐Sequence Stars with the Hubble Space Telescope Space Telescope Imaging Spectrograph. I. The Herbig Ae Stars." The Astrophysical Journal 630 (2): 958-975 [Full Text (Link)] [10.1086/430731]

    Iping, R. C., G. Sonneborn, T. R. Gull, D. L. Massa, and D. J. Hillier. 2005. "Detection of a Hot Binary Companion of η Carinae." The Astrophysical Journal 633 L37 [Full Text (Link)] [10.1086/498268]

    Smith, N., J. A. Morse, T. R. Gull, et al. D. J. Hillier, R. D. Gehrz, N. R. Walborn, M. Bautista, N. R. Collins, M. F. Corcoran, A. Damineli, F. Hamann, H. Hartman, S. Johansson, O. Stahl, and K. Weis. 2004. "Kinematics and Ultraviolet to Infrared Morphology of the Inner Homunculus of η Carinae." The Astrophysical Journal 605 405 [Full Text (Link)] [10.1086/382185]

    Cohen, M., H. Van Winckel, H. E. Bond, and T. R. Gull. 2004. "Hubble Space Telescope Imaging of HD 44179, The Red Rectangle." The Astronomical Journal 127 2362 [Full Text (Link)] [10.1086/382902]

    Hartman, H., T. Gull, S. Johansson, N. Smith, and H. E. . 2004. "Identification of emission lines in the low-ionization strontium filament near Eta Carinae." Astronomy and Astrophysics, v419, p215-224 (2004) 419 215 [Full Text (Link)] [10.1051/0004-6361:20035647]

    Smith, N., J. A. Morse, N. R. Collins, and T. R. Gull. 2004. "The Purple Haze of ? Carinae: Binary-induced Variability?" The Astrophysical Journal 610 L105 [Full Text (Link)] [10.1086/423341]

    Verner, E., F. Bruhweiler, D. Verner, et al. S. Johansson, T. Kallman, and T. Gull. 2004. "Fe II Diagnostic Tools for Quasars." The Astrophysical Journal 611 780 [Full Text (Link)] [10.1086/422303]

    Corcoran, M. F., K. Hamaguchi, T. Gull, et al. K. Davidson, R. Petre, D. J. Hillier, N. Smith, A. Damineli, J. A. Morse, N. R. Walborn, E. Verner, N. Collins, S. White, J. M. Pittard, K. Weis, D. Bomans, and Y. Butt. 2004. "Waiting in the Wings: Reflected X-Ray Emission from the Homunculus Nebula." The Astrophysical Journal 613 381 [Full Text (Link)] [10.1086/423024]

    Chu, Y., R. A. Gruendl, R. M. Williams, T. R. Gull, and K. Werner. 2004. "The Nebular Environment and Enigmatic Hard X-Ray Emission of the Hot DO White Dwarf KPD 0005+5106." The Astronomical Journal 128 2357 [Full Text (Link)] [10.1086/424942]

    Proffitt, C. R., K. Sahu, M. Livio, et al. J. Krist, D. Calzetti, R. Gilliland, C. A. Grady, D. Lindler, B. E. Woodgate, S. R. Heap, M. Clampin, T. R. Gull, and C. M. Lisse. 2004. "Limits on the Optical Brightness of the ε Eridani Dust Ring." The Astrophysical Journal 612 481 [Full Text (Link)] [10.1086/422549]

    Hartman, H., A. Derkatch, M. P. Donnelly, et al. T. Gull, A. Hibbert, S. Johansson, H. Lundberg, S. Mannervik, L. Norlin, D. Rostohar, P. Royen, and P. Schef. 2003. "The FERRUM Project: Experimental transition probabilities of [Fe II] and astrophysical applications." Astronomy and Astrophysics, v397, p1143-1149 (2003) 397 1143 [Full Text (Link)] [10.1051/0004-6361:20021557]

    Smith, N., K. Davidson, T. R. Gull, K. Ishibashi, and D. J. Hillier. 2003. "Latitude-dependent Effects in the Stellar Wind of η Carinae." The Astrophysical Journal 586 432 [Full Text (Link)] [10.1086/367641]

    Verner, E., F. Bruhweiler, D. Verner, S. Johansson, and T. Gull. 2003. "Revisited Abundance Diagnostics in Quasars: Fe II/Mg II Ratios." The Astrophysical Journal 592 L59 [Full Text (Link)] [10.1086/377571]

    Grady, C. A., C. R. Proffitt, E. Malumuth, et al. B. E. Woodgate, T. R. Gull, C. W. Bowers, S. R. Heap, R. A. Kimble, D. Lindler, P. Plait, and A. Weinberger. 2003. "Coronagraphic Imaging with the Hubble Space Telescope and the Space Telescope Imaging Spectrograph." The Publications of the Astronomical Society of the Pacific 115 1036 [Full Text (Link)] [10.1086/377083]

    Malumuth, E. M., R. S. Hill, T. Gull, et al. B. E. Woodgate, C. W. Bowers, R. A. Kimble, D. Lindler, P. Plait, and M. Blouke. 2003. "Removing the Fringes from Space Telescope Imaging Spectrograph Slitless Spectra." The Publications of the Astronomical Society of the Pacific 115 218 [Full Text (Link)] [10.1086/345913]

    Ishibashi, K., T. R. Gull, K. Davidson, et al. N. Smith, T. Lanz, D. J. Lindler, K. Feggans, E. M. Verner, B. E. Woodgate, R. A. Kimble, C. W. Bowers, S. B. Kraemer, S. R. Heap, A. C. Danks, S. P. Maran, C. L. Joseph, M. E. Kaiser, J. L. Linsky, F. Roesler, and D. Weistrop. 2003. "Discovery of a Little Homunculus within the Homunculus Nebula of η Carinae." The Astronomical Journal 125 3222 [Full Text (Link)] [10.1086/375306]

    Corcoran, M., J. H. Swank, K. Ishibashi, et al. T. Gull, R. Humphreys, A. Damineli, N. Walborn, D. J. Hillier, K. Davidson, S. M. White, R. Petre, J. Pittard, Y. Butt, and K. Verner. 2002. "Recent X-ray Variability of Eta Car Approaching The X-ray Eclipse." Bulletin of the American Astronomical Society 34 1184-

    Bautista, M. A., T. R. Gull, K. Ishibashi, H. Hartman, and K. Davidson. 2002. "Excitation of Srii lines in Eta Carinae." Monthly Notices of the Royal Astronomical Society 331 875 [Full Text (Link)] [10.1046/j.1365-8711.2002.05250.x]

    Van Winckel, H., M. Cohen, and T. R. Gull. 2002. "The ERE of the ``Red Rectangle" revisited." Astronomy and Astrophysics, v390, p147-154 (2002) 390 147 [Full Text (Link)] [10.1051/0004-6361:20020623]

    Hutchings, J. B., D. M. Crenshaw, S. B. Kraemer, et al. J. R. Gabel, M. E. Kaiser, D. Weistrop, and T. R. Gull. 2002. "Balmer and He I Absorption in the Nuclear Spectrum of NGC 4151." The Astronomical Journal 124 2543 [Full Text (Link)] [10.1086/344080]

    King, N. L., A. Nota, J. R. Walsh, et al. N. Panagia, T. R. Gull, A. Pasquali, M. Clampin, and L. E. Bergeron. 2002. "A Hubble Space Telescope Polarization Study of Dust in the η Carinae Homunculus." The Astrophysical Journal 581 285 [Full Text (Link)] [10.1086/344168]

    Verner, E. M., T. R. Gull, F. C. Bruhweiler, et al. S. Johansson, K. Ishibashi, and K. Davidson. 2002. "The Origin of Fe II and [Fe II] Emission Lines in the 4000-10000 Å Range in the BD Weigelt Blobs of η Carinae." The Astrophysical Journal 581 1154 [Full Text (Link)] [10.1086/344443]

    Tripp, T. M., E. B. Jenkins, G. M. Williger, et al. S. R. Heap, C. W. Bowers, A. C. Danks, R. Davé, R. F. Green, T. R. Gull, C. L. Joseph, M. E. Kaiser, D. J. Lindler, R. J. Weymann, and B. E. Woodgate. 2002. "The Heavy-Element Enrichment of Lyα Clouds in the Virgo Supercluster." The Astrophysical Journal 575 697 [Full Text (Link)] [10.1086/341338]

    Davidson, K., N. Smith, T. R. Gull, K. Ishibashi, and D. J. Hillier. 2001. "The Shape and Orientation of the Homunculus Nebula Based on Spectroscopic Velocities." The Astronomical Journal 121 1569 [Full Text (Link)] [10.1086/319419]

    Bower, G. A., R. F. Green, R. Bender, et al. K. Gebhardt, T. R. Lauer, J. Magorrian, D. O. Richstone, A. Danks, T. Gull, J. Hutchings, C. Joseph, M. E. Kaiser, D. Weistrop, B. Woodgate, C. Nelson, and E. M. Malumuth. 2001. "Evidence of a Supermassive Black Hole in the Galaxy NGC 1023 from the Nuclear Stellar Dynamics." The Astrophysical Journal 550 75 [Full Text (Link)] [10.1086/319730]

    Joseph, C. L., D. Merritt, R. Olling, et al. M. Valluri, R. Bender, G. Bower, A. Danks, T. Gull, J. Hutchings, M. E. Kaiser, S. Maran, D. Weistrop, B. Woodgate, E. Malumuth, C. Nelson, P. Plait, and D. Lindler. 2001. "The Nuclear Dynamics of M32. I. Data and Stellar Kinematics." The Astrophysical Journal 550 (2): 668-690 [Full Text (Link)] [10.1086/319781]

    Kraemer, S. B., D. M. Crenshaw, J. B. Hutchings, et al. I. M. George, A. C. Danks, T. R. Gull, M. E. Kaiser, C. H. Nelson, D. Weistrop, and G. L. Vieira. 2001. "Space Telescope Imaging Spectrograph Echelle Observations of the Seyfert Galaxy NGC 4151: Physical Conditions in the Ultraviolet Absorbers." The Astrophysical Journal 551 671 [Full Text (Link)] [10.1086/320244]

    Gull, T. R. 2001. "η Carinae and Other Mysterious Stars: Hidden Opportunities for Emission Spectroscopy." The Publications of the Astronomical Society of the Pacific 113 512 [Full Text (Link)] [10.1086/319539]

    Hillier, D. J., K. Davidson, K. Ishibashi, and T. R. Gull. 2001. "On the Nature of the Central Source in η Carinae." The Astrophysical Journal 553 837 [Full Text (Link)] [10.1086/320948]

    Smette, A., A. S. Fruchter, T. R. Gull, et al. K. C. Sahu, L. Petro, H. Ferguson, J. Rhoads, D. J. Lindler, R. Gibbons, D. W. Hogg, C. Kouveliotou, M. Livio, D. Macchetto, M. R. Metzger, H. Pedersen, E. Pian, S. E. Thorsett, R. A. Wijers, J. P. Fynbo, J. Gorosabel, J. Hjorth, B. L. Jensen, A. Levine, D. A. Smith, T. Cline, K. Hurley, and J. Trombka. 2001. "Hubble Space Telescope STIS Observations of GRB 000301C: CCD Imaging and Near-Ultraviolet MAMA Spectroscopy." The Astrophysical Journal 556 70 [Full Text (Link)] [10.1086/321585]

    Zethson, T., T. R. Gull, H. Hartman, et al. S. Johansson, K. Davidson, and K. Ishibashi. 2001. "Sr II and [Sr II] Emission in the Ejecta of η Carinae." The Astronomical Journal 122 322 [Full Text (Link)] [10.1086/321119]

    Gebhardt, K., T. R. Lauer, J. Kormendy, et al. J. Pinkney, G. A. Bower, R. Green, T. Gull, J. B. Hutchings, M. E. Kaiser, C. H. Nelson, D. Richstone, and D. Weistrop. 2001. "M33: A Galaxy with No Supermassive Black Hole." The Astronomical Journal 122 2469 [Full Text (Link)] [10.1086/323481]

    Ruiz, J. R., D. M. Crenshaw, S. B. Kraemer, et al. G. A. Bower, T. R. Gull, J. B. Hutchings, M. E. Kaiser, and D. Weistrop. 2001. "Kinematics of the Narrow-Line Region in the Seyfert 2 Galaxy Markarian 3." The Astronomical Journal 122 2961 [Full Text (Link)] [10.1086/323917]

    Grady, C. A., E. F. Polomski, T. Henning, et al. B. Stecklum, B. E. Woodgate, C. M. Telesco, R. K. Piña, T. R. Gull, A. Boggess, C. W. Bowers, F. C. Bruhweiler, M. Clampin, A. C. Danks, R. F. Green, S. R. Heap, J. B. Hutchings, E. B. Jenkins, C. Joseph, M. E. Kaiser, R. A. Kimble, S. Kraemer, D. Lindler, J. L. Linsky, S. P. Maran, H. W. Moos, P. Plait, F. Roesler, J. G. Timothy, and D. Weistrop. 2001. "The Disk and Environment of the Herbig Be Star HD 100546." The Astronomical Journal 122 3396 [Full Text (Link)] [10.1086/324447]

    Kaiser, M. E., L. D. Bradley, J. B. Hutchings, et al. D. M. Crenshaw, T. R. Gull, S. B. Kraemer, C. H. Nelson, J. Ruiz, and D. Weistrop. 2000. "The Resolved Narrow-Line Region in NGC 4151." The Astrophysical Journal 528 260 [Full Text (Link)] [10.1086/308143]

    Nelson, C. H., D. Weistrop, J. B. Hutchings, et al. D. M. Crenshaw, T. R. Gull, M. E. Kaiser, S. B. Kraemer, and D. Lindler. 2000. "Space Telescope Imaging Spectrograph Long-Slit Spectroscopy of the Narrow-Line Region of NGC 4151 I Kinematics and Emission-Line Ratios." The Astrophysical Journal 531 257 [Full Text (Link)] [10.1086/308456]

    Davidson, K., K. Ishibashi, T. R. Gull, R. M. Humphreys, and N. Smith. 2000. "η Carinae: Testing a Binary Orbit Model with the Hubble Space Telescope/Space Telescope Imaging Spectrograph." The Astrophysical Journal 530 L107 [Full Text (Link)] [10.1086/312502]

    Kraemer, S. B., D. M. Crenshaw, J. B. Hutchings, et al. T. R. Gull, M. E. Kaiser, C. H. Nelson, and D. Weistrop. 2000. "Space Telescope Imaging Spectrograph Long-Slit Spectroscopy of the Narrow-Line Region of NGC 4151 II Physical Conditions along Position Angle 221 deg." The Astrophysical Journal 531 278 [Full Text (Link)] [10.1086/308457]

    Bower, G. A., R. F. Green, A. C. Quillen, et al. A. Danks, T. Gull, J. Hutchings, C. Joseph, M. E. Kaiser, D. Weistrop, B. Woodgate, E. M. Malumuth, and C. Nelson. 2000. "The Ionization Source in the Nucleus of M84." The Astrophysical Journal 534 189 [Full Text (Link)] [10.1086/308741]

    Johansson, S., T. Zethson, H. Hartman, et al. J. O. Ekberg, K. Ishibashi, K. Davidson, and T. Gull. 2000. "New forbidden and fluorescent Fe III lines identified in HST spectra of eta Carinae." Astronomy and Astrophysics, v361, p977-981 (2000) 361 977 [Full Text (Link)]

    Crenshaw, D. M., S. B. Kraemer, J. B. Hutchings, et al. L. D. Bradley, T. R. Gull, M. E. Kaiser, C. H. Nelson, J. R. Ruiz, and D. Weistrop. 2000. "A Kinematic Model for the Narrow-Line Region in NGC 4151." The Astronomical Journal 120 1731 [Full Text (Link)] [10.1086/301574]

    Crenshaw, D. M., S. B. Kraemer, J. B. Hutchings, et al. A. C. Danks, T. R. Gull, M. E. Kaiser, C. H. Nelson, and D. Weistrop. 2000. "Space Telescope Imaging Spectrograph Echelle Observations of NGC 4151: Variable Ionization of the Intrinsic UV Absorbers." The Astrophysical Journal 545 L27 [Full Text (Link)] [10.1086/317333]

    Sollerman, J., P. Lundqvist, D. Lindler, et al. R. A. Chevalier, C. Fransson, T. R. Gull, C. S. Pun, and G. Sonneborn. 2000. "Observations of the Crab Nebula and Its Pulsar in the Far-Ultraviolet and in the Optical." The Astrophysical Journal 537 861 [Full Text (Link)] [10.1086/309062]

    Maran, S. P., G. Sonneborn, C. S. Pun, et al. P. Lundqvist, R. C. Iping, and T. R. Gull. 2000. "Physical Conditions in Circumstellar Gas Surrounding SN 1987A 12 Years after Outburst." The Astrophysical Journal 545 390 [Full Text (Link)] [10.1086/317809]

    Non-Refereed

    Grady, C. A., B. E. Woodgate, C. W. Bowers, et al. T. R. Gull, M. L. Sitko, and Et al.. 2005. "Coronagraphic Imaging of Pre-Main-Sequence Stars with the Hubble Space Telescope Space Telescope Imaging Spectrograph I The Herbig Ae Stars ." The Astrophysical Journal 630 958 [10.1086/43073]

                                                                                                                                                                                            
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