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17 papers · 2 filters
The Chandra XBootes Survey - III: Optical and Near-IR Counterparts
Kate Brand, Michael J. I. Brown, Arjun Dey +14
The XBootes Survey is a 5-ks Chandra survey of the Bootes Field of the NOAO Deep Wide-Field Survey (NDWFS). This survey is unique in that it is the largest (9.3 deg^2), contiguous…
Roche Lobes in the Second Post-Newtonian Approximation
Sasa Ratkovic, Madappa Prakash, James M. Lattimer
Close binary systems of compact stars, due to the emission of gravitational radiation, may evolve into a phase in which the less massive star transfers mass to its companion. We de…
Adaptive Binning of X-ray data with Weighted Voronoi Tesselations
Steven Diehl, Thomas S. Statler
We present a technique to adaptively bin sparse X-ray data using weighted Voronoi tesselations (WVTs). WVT binning is a generalisation of Cappellari & Copin's (2001) Voronoi binnin…
Gamma Rays from Compton Scattering in the Jets of Microquasars: Application to LS 5039
Charles D. Dermer, Markus Boettcher
Recent HESS observations show that microquasars in high-mass systems are sources of VHE gamma-rays. A leptonic jet model for microquasar gamma-ray emission is developed. Using the…
A Fundamental Plane Relation for the X-Ray Gas in Normal Elliptical Galaxies
Steven Diehl, Thomas S. Statler
We report on the discovery of a new correlation between global parameters of the hot interstellar gas in elliptical galaxies. We reanalyze archival Chandra data for 30 normal early…
Optical Lightcurve & Cooling Break of GRB 050502A
S. A. Yost, K. Alatalo, E. S. Rykoff +29
We present lightcurves of the afterglow of GRB050502A, including very early data at t-t_{GRB} < 60s. The lightcurve is composed of unfiltered ROTSE-IIIb optical observations from 4…