Einstein observations of the confused 2A 2315-428 region.
Abstract
Four distinct X-ray sources have been detected by the Einstein Observatory imaging proportional counter in the 2A2315-428 field. The strongest source in the 0.2-3.8 keV band is associated with the Sersic 159-03 cluster, which contains a cD galaxy, and may account for as much as 40% of the observed 2A flux. The rest of the flux is suspected to issue from the weaker but more heavily cut-off galaxy NGC 7582. It is suggested that such a large X-ray absorption column density in NGC 7582 may account for the absence of a broad H-alpha emission component, as has been observed in other narrow-line X-ray galaxies. The weak X-ray flux from NGC 7552 shows together with a reanalysis of previous observations, that the source is not variable, that its X-ray emission is not likely to result from a compact nucleus, and that it may be a starburst galaxy.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 1982
- DOI:
- 10.1093/mnras/200.2.263
- Bibcode:
- 1982MNRAS.200..263C
- Keywords:
-
- Astronomical Spectroscopy;
- Galactic Radiation;
- Heao 2;
- Radiant Flux Density;
- Spaceborne Astronomy;
- X Ray Sources;
- Brightness Distribution;
- Emission Spectra;
- Globular Clusters;
- Heao 1;
- Line Spectra;
- Luminosity;
- Proportional Counters;
- Spiral Galaxies;
- Starburst Galaxies;
- Astronomy