567 citations · 3.3k across the 76 of their papers we have counts for
7 papers · 1 filter
Determining X-Ray Source Intensity and Confidence Bounds in Crowded Fields
F. A. Primini, V. L. Kashyap
We present a rigorous description of the general problem of aperture photometry in high energy astrophysics photon-count images, in which the statistical noise model is Poisson, no…
Disentangling Overlapping Astronomical Sources using Spatial and Spectral Information
David E. Jones, Vinay L. Kashyap, David A. van Dyk
We present a powerful new algorithm that combines both spatial information (event locations and the point spread function) and spectral information (photon energies) to separate ph…
Strong Lens Time Delay Challenge: II. Results of TDC1
Kai Liao, Tommaso Treu, Phil Marshall +23
We present the results of the first strong lens time delay challenge. The motivation, experimental design, and entry level challenge are described in a companion paper. This paper…
The Chandra Cygnus OB2 Legacy Survey: Design and X-ray Point Source Catalog
Nicholas J. Wright, Jeremy J. Drake, Mario G. Guarcello +5
The Cygnus OB2 association is the largest concentration of young and massive stars within 2 kpc of the Sun, including an estimated 65 O-type stars and hundreds of OB stars. The Cha…
Burn Out or Fade Away? On the X-ray and Magnetic Death of Intermediate Mass Stars
Jeremy J. Drake, Jonathan Braithwaite, Vinay Kashyap +2
The nature of the mechanisms apparently driving X-rays from intermediate mass stars lacking strong convection zones or massive winds remains poorly understood, and the possible rol…
A 33 year constancy of the X-ray coronae of AR Lac and eclipse diagnosis of scale height
Jeremy J. Drake, Peter Ratzlaff, Vinay Kashyap +3
Extensive X-ray and extreme ultraviolet (EUV) photometric observations of the eclipsing RS CVn system AR Lac were obtained over the years 1997 to 2013 with the Chandra X-ray Observ…