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Energy-dependent orbital modulation of X-rays and constraints on emission of the jet in Cyg X-3
We study orbital modulation of X-rays from Cyg X-3, using data from Swift, INTEGRAL and RXTE. Using the wealth of the presently available data and an improved averaging method, we obtainExpand
Compton scattering as the explanation of the peculiar X-ray properties of Cyg X-3
We consider implications of a possible presence of a Thomson-thick, low-temperature, plasma cloud surrounding the compact object in the binary system Cyg X-3. The presence of such a cloud was earlierExpand
Statistical Evidence for Three Classes of Gamma-Ray Bursts
Two different multivariate clustering techniques, the K-means partitioning method and the Dirichlet process of mixture modeling, have been applied to the BATSE gamma-ray burst (GRB) catalog, toExpand
The Nonlinear Behavior of the Black Hole System GRS 1915+105
Using nonlinear time series analysis, along with surrogate data analysis, it is shown that the various types of long-term variability exhibited by the black hole system GRS 1915+105 can be explainedExpand
Phase-resolved X-ray polarimetry of the Crab pulsar with the AstroSat CZT Imager
The Crab pulsar is a typical example of a young, rapidly spinning, strongly magnetized neutron star that generates broadband electromagnetic radiation by accelerating charged particles to near lightExpand
Calibration of the Large Area X-ray Proportional Counter (LAXPC) instrument on-board AstroSat
We present the calibration and background model for the Large Area X-ray Proportional Counter (LAXPC) detectors on-board AstroSat. LAXPC instrument has three nominally identical detectors to achieveExpand
AstroSat/LAXPC reveals the high energy variability of GRS 1915+105 in the chi class
We present the first quick look analysis of data from nine {\it AstroSat}'s LAXPC observations of GRS 1915+105 during March 2016 when the source had the characteristics of being in Radio-quiet $\chi$Expand
A compton upscattering model for soft lags in the lower kilohertz quasi-periodic oscillation in 4u 1608-52
An empirical Compton upscattering model is described that reproduces both the fractional amplitude (rms) versus energy and the soft time lags in the ≈830 Hz quasi-periodic oscillation (QPO) observedExpand
NuSTAR and Swift joint view of neutron star X-ray binary 4U~1728--34 : Disc reflection in the island and lower banana states
We analyze two simultaneous \nustar{} and \swift{} data of the Atoll type neutron star (NS) X-ray binary 4U~1728--34 observed on 1 and 3 October, 2013. Based on power density spectra, hardness ratioExpand
X-Ray Variability of Active Galactic Nuclei in the Soft and Hard X-Ray Bands
We investigate the X-ray variability characteristics of hard X-ray-selected active galactic nuclei (AGNs)—based on Swift/Burst Alert Telescope—in the soft X-ray band using the Rossi X-ray TimingExpand