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Spectral Statistics and Local Luminosity Function of a Complete Hard X-Ray Sample of the Brightest Active Galactic Nuclei
Ishisaki, Y.; Ueda, Y.; Miyaji, T. +2 more
We have measured the X-ray spectral properties of a complete flux-limited sample of bright active galactic nuclei (AGNs) from the HEAO-1 all-sky catalogs to investigate their statistics and provide greater constraints on the bright end of the hard X-ray luminosity function (HXLF) and the AGN population synthesis model of the X-ray background. Spec…
XMM-Newton Observations of High-Redshift Quasars
Grupe, D.; Mathur, S.; Wilkes, B. +1 more
We report on our XMM-Newton observations of the high-redshift quasars BR 2237-0607 (z=4.558) and BR 0351-1034 (z=4.351). We also report on XMM-Newton observations of 19 other z>4 objects available in the public archive of which 14 were detected. We find that the optical to X-ray spectral index αox is correlated with the luminosity density at 25…
XMM-Newton and Optical Follow-up Observations of SDSS J093249.57+472523.0 and SDSS J102347.67+003841.2
Anderson, Scott F.; Brinkmann, J.; Szkody, Paula +5 more
We report follow-up XMM-Newton and ground-based optical observations of the unusual X-ray binary SDSS J102347.67+003841.2 (=FIRST J102347.6+003841) and a new candidate intermediate polar (IP) found in the Sloan Digital Sky Survey: SDSS J093249.57+472523.0. SDSS J1023 was observed in its low state, with similar magnitude/color (V=17.4 and B=17.9) a…
A ROSAT Survey of Contact Binary Stars
McKay, T. A.; Geske, M. T.; Gettel, S. J.
Contact binary stars are common variable stars that are all believed to emit relatively large fluxes of X-rays. In this work we combine a large new sample of contact binary stars derived from the ROTSE-I telescope with X-ray data from the ROSAT All Sky Survey (RASS) to estimate the X-ray volume emissivity of contact binary stars in the Galaxy. We …
Characterizing three candidate magnetic cataclysmic variables from SDSS: XMM-Newton and optical follow-up observations.
Szkody, P.; Henden, A.; Schmidt, G. D. +4 more
In the latest in our series of papers on XMM-Newton and ground-based optical follow-up of new candidate magnetic cataclysmic variables (mCVs) found in the Sloan Digital Sky Survey, we report classifications of three systems: SDSS J144659.95+025330.3, SDSS J205017.84-053626.8, and SDSS J210131.26+105251.5. Both the X-ray and optical fluxes of SDSS …
X-Ray Pulsations in the Supersoft X-Ray Binary CAL 83
Cowley, A. P.; Schmidtke, P. C.
Chandra and XMM-Newton X-ray data reveal that the supersoft X-ray binary CAL 83 exhibits 38.4 minute pulsations at some epochs. These X-ray variations are similar to those found in some novae and are likely to be caused by nonradial pulsations of the white dwarf. This is the first detection of pulsations in a classical supersoft X-ray binary.
An X-Ray Observation of the L1251 Dark Cloud
Simon, Theodore
An X-ray image of the L1251 dark cloud in Cepheus was obtained with the XMM-Newton telescope. More than three dozen sources were detected above a 3 σ limit in X-ray luminosity of LX=1029.0 ergs s-1. Among the detections are eight optically visible T Tauri stars, which had been identified in earlier work from their …
XMM-Newton Detection of the Rare Fanaroff-Riley Type II Broad Absorption Line Quasar FIRST J101614.3+520916
White, Richard L.; Gregg, Michael D.; Lacy, Mark +5 more
We have detected FIRST J101614.3+520916 with the XMM-Newton X-ray observatory. FIRST J101614.3+520916, one of the most extreme radio-loud, broad absorption line (BAL) quasars so far discovered, is also a Fanaroff-Riley type II radio source. We find that, compared to its estimated intrinsic X-ray flux, the observed X-rays are likely suppressed and …