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6 papers
A Flux Limited Atlas of Galaxy Cluster Temperature Maps
R. Hank Donnelly, C. Jones, W. Forman +2
An atlas of gas temperature maps is presented for a flux limited catalog of galaxy clusters. The sample of clusters is based on the Edge et al. (1990) sample, with the inclusion of…
Frequency resolved spectroscopy of Cyg X-1: fast variability of the Fe K_alpha line
M. Revnivtsev, M. Gilfanov, E. Churazov
We studied the frequency resolved energy spectra of Cyg X--1 during the standard low (hard) spectral state using the data of the Rossi X-Ray Timing Explorer. We found that the rela…
Long-Term Variability of the Hard X-ray Source GRS 1758-258: GRANAT/SIGMA Observations
S. I. Kuznetsov, M. R. Gilfanov, E. M. Churazov +13
The results of GRANAT/SIGMA hard X-ray observations of GRS 1758-258 in 1990-1998 are presented. The source lies at ~5\arcdeg from the Galactic Center and was within the SIGMA field…
Restrictions on the parameters of boundary layer and accretion disk of X-ray bursters in the low state
M. Revnivtsev, M. Gilfanov, E. Churazov +1
Using ASCA observations of several X-ray bursters in the low spectral state Lx~1-5x10^{36} erg/s) restrictions on the parameters of the accretion disk and the boundary layer were o…
Temperature Structure in Abell 1367
R. Hank Donnelly, M. Markevitch, W. Forman +4
We study the temperature structure of the rich cluster of galaxies Abell 1367 using two independent methods of correcting for the ASCA PSF. The results of the two methods are in ex…
SIGMA observations of X-ray Nova Velorum 1993 (GRS 1009-45)
P. Goldoni, M. Vargas, A. Goldwurm +13
We report on hard X-ray observations of X-ray Nova Velorum 1993 (GRS 1009-45) performed with the SIGMA coded mask X-ray telescope in January 1994. The source was clearly detected w…