Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasp..107..561e&link_type=abstract
Publications of the Astronomical Society of the Pacific, v.107, p.561
Astronomy and Astrophysics
Astronomy
6
Local Group, Galaxies: Clusters: Individual: Ic 1613 X-1
Scientific paper
Based on Einstein IPC imaging and spectroscopy, optical spectroscopy and optical imaging, I argue that the x-rays seen in the direction of the Local Group dwarf irregular galaxy IC 1613 are mainly due to emission from a previously uncataloged cluster of galaxies (CL B0102+0146) at a redshift of z ~ 0.2 and of richness class ~3, centered at the IPC x-ray position. The Einstein data are not adequate to determine if the x-rays are due to cluster emission or an AGN. However, both the available optical data, and the non-detection of this object in deep radio surveys argue that a hote intracluster medium is the source of the x-ray emission. The x-ray flux of this cluster in the Einstein IPC band (0.2-4.0 keV) is higher than 78% of the clusters in the Einstein Extended Medium Sensitivity Survey sample of Gioia et al. (1990). It is thus likely that only its position behind IC 1613 prevented its earlier detection. (SECTION: Galaxies)
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