Optical spectrophotometry of the suspected X-ray cluster of galaxies E 1455 + 2232

Details Optical spectrophotometry of the suspected X-ray cluster of galaxies E 1455 + 2232 Optical spectrophotometry of the suspected X-ray cluster of galaxies E 1455 + 2232

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86..803m&link_type=abstract

Astronomical Journal, vol. 86, June 1981, p. 803-805.

Astronomy and Astrophysics

Astronomy

16

Astronomical Photometry, Galactic Clusters, Optical Measurement, X Ray Sources, Photographic Plates, Red Shift, Spectrophotometry

Scientific paper

The redshift of the cluster of galaxies at the position of the x-ray source E 1455+2232 is measured based on spectrophotometry of four member galaxies. It is found to be z = 0.259, significantly lower than the value of z ∼ 0.7 proposed by Schild et al. The line-of-sight velocity dispersion is ∼600 km s-1 and the x-ray luminosity in the 0.5 .5-keV energy range at the source is calculated to be 9 × 1044 erg s-1. The redshift of the cluster A 2001, which is centered ∼0.5deg from the x-ray position, is also measured. It is shown that A 2001 is physically distinct from the new cluster probably associated with the x-ray source.

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