The ROSAT Wide Field Camera all-sky survey of extreme-ultraviolet sources - II. The 2RE Source Catalogue (1995)
Keywords :
space vehicles - catalogues - stars late-type - white dwarfs - ultraviolet: general - X-rays: general.
Abstract:During 1990-1991 the Wide Field Camera (WFC) on the ROSAT satellite performed the first all-sky survey at EUV wavelengths. The survey was conducted in two 'colours' using broad-band filters to define wavebands covering the ranges 60-140A and 112-200A. It was fully imaging, with effective spatial resolution of about 3arcmin FWHM, and point source location accuracy of typically better than 1 arcmin. From an initial analysis, Pounds et al. published the WFC Bright Source Catalogue (BSC) of 383 sources. In this paper we report results from reprocessing of the complete survey database; the resulting list of sources is the '2RE' Catalogue. It contains 479 sources, of which 387 are detected in both survey wavebands, a significant advance on the BSC
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During 1990-1991 the Wide Field Camera (WFC) on the ROSAT satellite
performed the first all-sky survey at EUV wavelengths. The survey was
conducted in two 'colours' using broad-band filters to define
wavebands covering the ranges 60-140A and 112-200A. It was fully
imaging, with effective spatial resolution of about 3arcmin FWHM, and
point source location accuracy of typically better than 1 arcmin. From
an initial analysis, Pounds et al. published the WFC Bright Source
Catalogue (BSC) of 383 sources. In this paper we report results from
reprocessing of the complete survey database; the resulting list of
sources is the '2RE' Catalogue. It contains 479 sources, of which 387
are detected in both survey wavebands, a significant advance on the BSC
(80 per cent versus 60 per cent). Improvements over the original BSC
include: (i) better rejection of poor aspect periods, and smaller
random errors in the aspect reconstruction; (ii) improved background
screening; (iii) improved methods for source detection; (iv) inclusion
of a time-variability test for each source; (v) more extensive
investigation of the survey sensitivity. We define the catalogue
selection criteria, and present the catalogue contents in terms of
tables and sky maps. We also discuss the sky coverage, source
number-flux relations, optical identifications and source variability.
- ftp : //ledas-ftp.star.le.ac.uk/rosat/2re/cat
- J/MNRAS/260/77 : the ROSAT-WFC Bright Source Catalogue (Pounds et al. 1993)
- J/A+AS/114/465 : the ROSAT XUV Pointed Phase Source Catalog
- II/203 : Second Extreme Ultra-Violet Explorer Catalog (1996)
- IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges et al. 1996)