VizieR Online Data Catalog: Chandra X-ray point sources in Abell 133 (Shin+, 2018)

We searched the Chandra archive for observations covering Abell 133 cluster of galaxies at z=0.0566, and found a total of 2.8Ms exposures split over 33 separate observations (see Table 1). All observations were taken with the Advanced CCD Imaging Spectrometer (ACIS). To cover the large extent of the Abell 133 cluster, which has R₂₀₀=26.6', the majority of Chandra observations were taken as a mosaic (for reference, the ACIS-I field of view is 16.9'x16.9'). We detect 1617, 1324, and 1028 X-ray point sources in the full, soft, and hard bands.

To improve the accuracy of the positions of the detected X-ray point sources, we applied an astrometry correction by searching for optical counterparts, using archival images from the Canada-France-Hawaii telescope (CFHT). Eleven g-band images were taken as a mosaic to cover 1 square degree, with a total exposure time of 1320s and 5σ limiting magnitude of 26.5. To identify optical counterparts, we consider 15093 optical points sources with rmag<22.5 in our CFHT images. Out of 1951 X-ray detections, we found optical counterparts for 310 sources by adopting a matching radius of 1.5"; see section 3.4.

(2 data files).