Philip B Graff

Photo of PHILIP GRAFF

Philip B Graff

  • Research Fellow
  • 301.286.5357
  • NASA/GSFC
  • Mail Code: 663
  • Greenbelt , MD 20771
  • Employer: UNIV MARYLAND COLLEGE PARK
  • Brief Bio

    I am a NASA post-doctoral fellow at Goddard Space Flight Center in Greenbelt, MD. My main research interests are the detection and measurement of gravitational wave signals from compact binary coalescence and the application of machine learning techniques to astrophysical data analysis. I am a member of the LIGO Scientific Collaboration, whose goal is to make the first direct detections of gravitational waves and open up the field of gravitational wave astronomy.

    See my personal site here.

    Research Interests

    Bayesian Inference for Gravitational Waves

    I work to perform Bayesian analysis of gravitational wave candidate triggers in LIGO and Virgo data. We then obtain a confidence in the detection of an actual signal and measures of the best-fit parameters and their uncertainties.

    Machine Learning for Astronomy

    I look at ways in which I can apply machine learning techniques to astronomical data analysis. This is largely focused on development and application of the SkyNey algorithm for training artificial neural networks. I have also applied support vector machines and random forests for comparison in classification problems.

    Education

    University of Maryland, Baltimore County
      - Sept 2004 to May 2008
      - graduated general honors and summa cum laude
      - BS Physics, BS Mathematics

    Cambridge University
      - Oct 2008 to June 2012
      - Gates Cambridge Scholar
      - Prof. Anthony Lasenby and Prof. Michael Hobson, supervisors
      - dissertation:  Bayesian Methods for Gravitational Waves and Neural Networks
      - PhD Physics

    Professional Societies

    American Astronomical Society, 2012 - Present
    Royal Astronomical Society, 2009 - 2012

    Awards

    Gates Cambridge Scholarship awarded 2008
    Phi Beta Kappa Honors Society member, inducted May 2007

    Selected Publications

    Refereed

    Babak, S., J. G. Baker, M. J. Benacquista, et al. N. J. Cornish, S. L. Larson, I. Mandel, S. T. McWilliams, A. Petiteau, E. K. Porter, E. L. Robinson, M. Vallisneri, A. Vecchio, T. M. Data Challenge Task Force, M. Adams, K. A. Arnaud, A. Błaut, M. Bridges, M. Cohen, C. Cutler, F. Feroz, J. R. Gair, P. Graff, M. Hobson, J. Shapiro Key, A. Królak, A. Lasenby, R. Prix, Y. Shang, M. Trias, J. Veitch, J. T. Whelan, and T. C. Participants. 2010. "The Mock LISA Data Challenges: from challenge 3 to challenge 4." Classical and Quantum Gravity, 27: 4009 [Full Text (Link)] [10.1088/0264-9381/27/8/084009]

    Graff, P. B., M. Georganopoulos, E. S. Perlman, and D. Kazanas. 2008. "A Multizone Model for Simulating the High-Energy Variability of TeV Blazars." The Astrophysical Journal, 689: 68 [Full Text (Link)] [10.1086/592427]

    Brief Bio

    I am a NASA post-doctoral fellow at Goddard Space Flight Center in Greenbelt, MD. My main research interests are the detection and measurement of gravitational wave signals from compact binary coalescence and the application of machine learning techniques to astrophysical data analysis. I am a member of the LIGO Scientific Collaboration, whose goal is to make the first direct detections of gravitational waves and open up the field of gravitational wave astronomy.

    See my personal site here.

    Refereed

    Babak, S., J. G. Baker, M. J. Benacquista, et al. N. J. Cornish, S. L. Larson, I. Mandel, S. T. McWilliams, A. Petiteau, E. K. Porter, E. L. Robinson, M. Vallisneri, A. Vecchio, T. M. Data Challenge Task Force, M. Adams, K. A. Arnaud, A. Błaut, M. Bridges, M. Cohen, C. Cutler, F. Feroz, J. R. Gair, P. Graff, M. Hobson, J. Shapiro Key, A. Królak, A. Lasenby, R. Prix, Y. Shang, M. Trias, J. Veitch, J. T. Whelan, and T. C. Participants. 2010. "The Mock LISA Data Challenges: from challenge 3 to challenge 4." Classical and Quantum Gravity 27 4009 [Full Text (Link)] [10.1088/0264-9381/27/8/084009]

    Graff, P. B., M. Georganopoulos, E. S. Perlman, and D. Kazanas. 2008. "A Multizone Model for Simulating the High-Energy Variability of TeV Blazars." The Astrophysical Journal 689 68 [Full Text (Link)] [10.1086/592427]

                                                                                                                                                                                            
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