The ROSAT North Ecliptic Pole Survey X-Ray Data

Details The ROSAT North Ecliptic Pole Survey X-Ray Data The ROSAT North Ecliptic Pole Survey X-Ray Data

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...553l.119v&link_type=abstract

The Astrophysical Journal, Volume 553, Issue 2, pp. L119-L123.

Astronomy and Astrophysics

Astronomy

21

Catalogs, Surveys, X-Rays: General

Scientific paper

In the ROSAT All-Sky Survey, an 80.7 deg2 region near the north ecliptic pole (NEP) constitutes the deepest contiguous observation of the X-ray sky. Four hundred and forty-five unique sources have been detected above a flux of ~2×10-14 ergs s-1 cm-2 (0.5-2.0 keV). The X-ray data for each source provide a likelihood of existence, position and position error, count rate and error, background count rate at the source position, exposure time, two hardness ratios and their errors, and a measure of extent and likelihood of nonzero extent. We describe the range and statistics of X-ray properties exhibited by the NEP sources and the accuracy with which they have been determined, concentrating on the flux measurement of extended galaxy cluster X-ray sources. We show two examples of sources whose X-ray morphology is useful in their optical identification.

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