A ROSAT XUV pointed phase source catalogue.

Details A ROSAT XUV pointed phase source catalogue. A ROSAT XUV pointed phase source catalogue.

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26as..114..465k&link_type=abstract

Astronomy and Astrophysics Supplement, v.114, p.465

Astronomy and Astrophysics

Astrophysics

14

Catalogues, Ultraviolet: Stars, X-Rays: Stars, Techniques: Photometric

Scientific paper

We present a catalogue of XUV sources from observations by the Wide Field Camera (WFC) on ROSAT during the pointed phase. The ROSAT WFC is a telescope sensitive in the extreme UV range (17-210eV) which observes in parallel with the ROSAT X-Ray Telescope (XRT). The 5916 pointed observations processed are from the calibration and verification phase in June 1990 and from the period 9 Feb. 1991 to 15 July 1994. The catalogue contains 1022 independent source detections which correspond to 328 individual sources, many of which have been observed repeatedly. Each observation was done with one of four filters S_1_, S_2_, P_1_ and P_2_. Of the 328 sources 113 are new sources (they are not listed in the "2RE" catalogue) and 274 have been identified with optical counterparts. The catalogue contains coordinates, observed count rates, normalized source count rates and the proposed optical counterpart with its spectral class. For observations with filters S_1_ and S_2_ an in-flight calibration has been applied using data of White Dwarfs which were assumed to have a constant flux and which were observed repeatedly (in pointed observations and/or during the All Sky Survey). In this way, it was possible to correct for the time dependant degradation of the detector efficiency and to normalize the count rates to those valid at the beginning of the mission.

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