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6 papers · 2 filters
Chandra Studies of the X-ray Point Source Luminosity Functions of M31
A. K. H. Kong, R. Di Stefano, M. R. Garcia +1
Three different M31 disk fields, spanning a range of stellar populations, were observed by Chandra. We report the X-ray point source luminosity function (LF) of each region, and th…
Testable anthropic predictions for dark energy
J. Garriga, A. Vilenkin
In the context of models where the dark energy density $\rD$ is a random variable, anthropic selection effects may explain both the "old" cosmological constant problem and the "tim…
Calculation of an optimized telescope apodizer for Terrestrial Planet Finder coronagraphic telescope
R. Gonsalves, P. Nisenson
One of two approaches to implementing NASA's Terrestrial Planet Finder is to build a space telescope that utilizes the techniques of coronagraphy and apodization to suppress diffra…
Chandra observations of the recurrent nova CI Aql after its April 2000 outburst
J. Greiner, R. DiStefano
We report the results of two Chandra observations of the recurrent nova CI Aql at 14 and 16 months after its outburst in April 2000, respectively. The X-ray emission is faint in bo…
X-Ray Off States and Optical Variability in CAL 83
J. Greiner, R. DiStefano
CAL 83 was one of the first supersoft X-ray binaries to be discovered and is considered to be the prototype of its class. In 15 X-ray observations between 1983-1997 it was observed…
X-ray Point Sources in The Central Region of M31 as seen by Chandra
A. K. H. Kong, M. R. Garcia, F. A. Primini +3
We report on \chandra observations of the central region of M31. By combining eight \chandra ACIS-I observations taken between 1999 and 2001, we have identified 204 X-ray sources w…