1977- Astrophysicist, Goddard Space Flight Center
1975-1977 NAS/NRC Resident Research Associate, X-ray Astrophysics Branch, Goddard Space Flight Center
1971-1974 Assistant Professor, Middle East Technical University, Ankara, Turkey
1969-1971 Assistant Professor, Chicago Sate University, Chicago, Illinois
1966-1969 Assistant Professor, California State University, Los Angeles, Los Angeles, California
Research
My interest in high energy phenomena has focused on research in X-ray astrophysics. I have worked on the interpretation of X-ray sources and on satellite experiments to observe the properties of these sources. With the broad-band spectroscopy and timing experiments on OSO 8 and HEAO 1 I investigated aspects of most types of galactic and extragalactic X-ray sources. With the experiments at the focus of the HEAO 2 telescope and with BBXRT and EXOSAT, I concentrated on the X-ray emissions from the X-ray stars on the HR diagram. I worked on the design and the development of the Proportional Counter Array on RXTE and now on operations and analysis, concentrating on compact stars, for which we made XTE especially well-suited. There remain ambiguities in interpretation of X-ray spectral and timing data, which X-ray polarization measurements could resolve, and I am working towards making this possible, using micropattern detectors.
B.A., Physics, Bryn Mawr College, 1961
Ph.D., Physics, California Institute of Technology, 1967
Thesis: "Radiative Corrections to Neutrino-Electron Interactions"
Advisor: Professor Steve Frautschi
Publications
"An X-Ray Polarimeter for Constellation X", K. Jahoda, K. Black, P. Deines-Jones, J. E. Hill, T. Kallman, T. Strohmayer, & J. H. Swank, astro-ph/0701090
"GRO J1655-40: Early Stages of the 2005 Outburst", N. Shaposhnikov, J. Swank, C. R. Shrader, M. Rupen, V. Beckmann, C. B. Markwardt, & D. A. Smith 2007, ApJ, 655, 434
"Timing Studies on RXTE observations of SAX J2103.5+4545", A. Baykal, S. C. Inam, M. J. Stark, C. M. Heffner, A. E. Erkoca, & J. H. Swank 2006, MNRAS, tmp, 1367
"RXTE Observations of 1A 1744-361: Correlated Spectral and Timing Behavior", S. Bhattacharyya, T. E. Stromayer, J. H. Swank, & C. B. Markwardt 2006, ApJ, 652, 603
"Calibration of the Rossi X-Ray Timing Explorer Proportional Counter Array", K. Jahoda, C. B. Markwardt, Y. Radeva, A. H. Rots, M. J. Stark, J. H. Swank, T. E. Strohmayer, & W. Zhang 2006, ApJS, 163, 401
"The Discovery of a Neutron Star wit a Spin Frequency of 530 Hz in A1744-361", S. Bhattacharyya, T. E. Strohmayer, C. B. Markwardt, & J. H. Swank 2006, ApJ, 639, L31
"XTE J1739-302 as a Supergiant Fast X-Ray Transient", D. M. Smith, W. A. Heindl, C. B. Markwardt, J. H. Swank, I. Negueruela, T. E. Harrison, & L. Huss 2006, ApJ, 638, 974
"The Rossi X-Ray Timing Explorer: Capabilities,Achievements and Aims", J. H. Swank 2006, AdSpR, 38, 2959
"Time Domain Studies of X-Ray Shot Noise in Cygnus X-1", W. B. Focke, L. L. Wai & J. H. Swank 2005, ApJ, 633, 1085
"Rossi X-Ray Timing Explorer Observations of the X-Ray Pulsar EXO 1722-363 - a Candidate Eclipsing Supergiant System", R. H. D. Corbet, C. B. Markwardt & J. H. Swank 2005, ApJ, 633, 377
"Chandra Observations of the Millisecond X-Ray Pulsar IGR J00291+5934", P. G. Jonker, D. Steegs, M. A. P. Torres, D. K. Galloway, C. B. Markwardt, D. Chakrabarty & J. Swank, 2005, MNRAS, 361, 511
"Quasi-Periodic Oscillations from Low-Mass X-Ray Binaries with Neutron Stars", J. H. Swank 2004, in X-Ray Timing 2004: Rossi and Beyond, eds P. Kaaret, F. K. Lamb, & J. H. Swank, AIP Conference Proc. 714, AIP, 357
"A SMEX Advanced X-Ray Polarimeter", J. H. Swank 2004, http://www-conf.slac.stanford.edu/xray_polar/talks.htm
"Discovery of a Transient Magnetar: XTE J1810-197", A. I. Ibrahim, C. B. Markwardt, J. H. Swank, S. Ransom, M. Roberts, V. Kaspi, P. M. Woods, S. Safi-Harb, S. Balman, W. C. Parke, C. Kouveliotov, K. Hurley & T. Cline 2003, ApJ, 609, L21
"X-Ray Bursts from the Accreting Millisecond Pulsar XTE J1814-338",
T. E. Strohmayer, C. B. Markwardt, J. H. Swank & J. in't Zand 2003, ApJ, 596, L67
"Discovery of a Second Millisecond Accreting Pulsar: XTE J1751-30", C. B. Markwardt, J. H. Swank, T. E. Strohmayer, J. J. M. in't Zand & F. E. Marshall 2002, ApJ, 574, L511
"Discovery of Cyclotron Resonance Features in the Soft Gamma Repeater SGR 1806-20", A. I. Ibrahim, S. Safi-Harb, J. H. Swank, W. Parke, S. Zane & R. Turolla 2002, ApJ, 574, L51
"Two Different Long-Term Behaviors in Black Hole Candidates: Evidence for Two Accretion Flows?", D. M. Smith, W. A. Heindl & J. H. Swank 2002, ApJ, 569, 362
