Search Publications

The Fifth Data Release Sloan Digital Sky Survey/XMM-Newton Quasar Survey

Elvis, M.; Risaliti, G.; Young, M.

We present a catalog of 792 Fifth Data Release Sloan Digital Sky Survey quasars with optical spectra that have been observed serendipitously in the X-rays with the XMM-Newton. These quasars cover a redshift range of z = 0.11-5.41 and a magnitude range of i = 15.3-20.7. Substantial numbers of radio-loud (70) and broad absorption line (51) quasars e…

X-Ray-Emitting Stars Identified from the ROSAT All-Sky Survey and the Sloan Digital Sky Survey

Anderson, Scott F.; Hawley, Suzanne L.; Szkody, Paula +7 more

The ROSAT All-Sky Survey (RASS) was the first imaging X-ray survey of the entire sky. Combining the RASS Bright and Faint Source Catalogs yields an average of about three X-ray sources per square degree. However, while X-ray source counterparts are known to range from distant quasars to nearby M dwarfs, the RASS data alone are often insufficient t…

ERRATUM: "The Fifth Data Release Sloan Digital Sky Survey/XMM-Newton Quasar Survey" (2009, ApJS, 183, 17)

Elvis, M.; Risaliti, G.; Young, M.

We have discovered an error in Column 9 of Table 2 in the original paper. This column reports the fit flags, indicating which model a source prefers: a simple power-law (SPL; flag = 1), a fixed power-law plus intrinsic absorption (FPL; flag = 2), or an absorbed power-law (APL; flag = 3). The table of the original paper mistakenly reports all flag …