X-ray images of the Galactic Center obtained with ART-P/GRAN AT: Discovery of new sources, variability of persistent sources, and localization of X-ray bursters

Details X-ray images of the Galactic Center obtained with ART-P/GRAN AT: Discovery of new sources, variability of persistent sources, and localization of X-ray bursters X-ray images of the Galactic Center obtained with ART-P/GRAN AT: Discovery of new sources, variability of persistent sources, and localization of X-ray bursters

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...425..110p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 425, no. 1, p. 110-121

Astronomy and Astrophysics

Astrophysics

102

Astronomical Maps, Astrophysics, Galactic Nuclei, Globular Clusters, X Ray Astronomy, X Ray Imagery, X Ray Sources, Astronomical Observatories, Imaging Spectrometers, Star Distribution, Stellar Luminosity, X Ray Telescopes

Scientific paper

Five series of Galactic Center field observations spaced by time intervals of half a year were performed with the ART-P coded-mask X-ray telescope aboard the GRAN AT observatory in 1990-1992. The telescope allows X-ray images to be obtained in the 3-30 keV band and X-ray sources to be localized with accuracy better than 1.5 arcmin. Twelve X-ray sources were revealed within the 5 by 5 degree neighborhood of Sgr A*, the nucleus of our Galaxy. Four of these sources, GRS 1741.9-2853, GRS 1736-297, GRS 1734-292, and GRS 1747-312 (associated with the globular cluster Terzan 6), were not observed before. Strong X-ray variability of Sgr A* and 1E 1740.7-2942, the hardest source in the field, was detected. More than 20 X-ray bursts from well-known sources A1742-294, SLX 1744-299, GX 3+1, and others were observed.

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