338 citations · 1.3k across the 43 of their papers we have counts for
12 papers · 1 filter
Six Maxims of Statistical Acumen for Astronomical Data Analysis
Hyungsuk Tak, Yang Chen, Vinay L. Kashyap +4
The production of complex astronomical data is accelerating, especially with newer telescopes producing ever more large-scale surveys. The increased quantity, complexity, and varie…
Joint Deconvolution of Astronomical Images in the Presence of Poisson Noise
Axel Donath, Aneta Siemiginowska, Vinay L. Kashyap +2
We present a new method for joint likelihood deconvolution (Jolideco) of a set of astronomical observations of the same sky region in the presence of Poisson noise. The observation…
Identifying diffuse spatial structures in high-energy photon lists
Minjie Fan, Jue Wang, Vinay L. Kashyap +3
Data from high-energy observations are usually obtained as lists of photon events. A common analysis task for such data is to identify whether diffuse emission exists, and to estim…
Concordance: In-flight Calibration of X-ray Telescopes without Absolute References
Herman L. Marshall, Yang Chen, Jeremy J. Drake +7
We describe a process for cross-calibrating the effective areas of X-ray telescopes that observe common targets. The targets are not assumed to be "standard candles" in the classic…
STACCATO: A Novel Solution to Supernova Photometric Classification with Biased Training Sets
Esben A. Revsbech, Roberto Trotta, David A. van Dyk
We present a new solution to the problem of classifying Type Ia supernovae from their light curves alone given a spectroscopically confirmed but biased training set, circumventing…
Bayesian Estimates of Astronomical Time Delays between Gravitationally Lensed Stochastic Light Curves
Hyungsuk Tak, Kaisey Mandel, David A. van Dyk +3
The gravitational field of a galaxy can act as a lens and deflect the light emitted by a more distant object such as a quasar. Strong gravitational lensing causes multiple images o…
Preprocessing Solar Images while Preserving their Latent Structure
Nathan M Stein, David A van Dyk, Vinay L Kashyap
Telescopes such as the Atmospheric Imaging Assembly aboard the Solar Dynamics Observatory, a NASA satellite, collect massive streams of high resolution images of the Sun through mu…
Detecting Unspecified Structure in Low-Count Images
Nathan M. Stein, David A. van Dyk, Vinay L. Kashyap +1
Unexpected structure in images of astronomical sources often presents itself upon visual inspection of the image, but such apparent structure may either correspond to true features…
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…
Accounting for Calibration Uncertainties in X-ray Analysis: Effective Areas in Spectral Fitting
Hyunsook Lee, Vinay L. Kashyap, David A. van Dyk +9
While considerable advance has been made to account for statistical uncertainties in astronomical analyses, systematic instrumental uncertainties have been generally ignored. This…
On Computing Upper Limits to Source Intensities
Vinay L. Kashyap, David A. van Dyk, Alanna Connors +4
A common problem in astrophysics is determining how bright a source could be and still not be detected. Despite the simplicity with which the problem can be stated, the solution in…