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GRANAT images of the Galactic Center region in 4–1300 keV band: Localization of the possible candidate for 511 keV source

 

作者: R. Sunyaev,   E. Churazov,   M. Gilfanov,   M. Pavlinsky,   S. Grebenev,   I. Dekhanov,   A. Kuznetsov,   N. Yamburenko,   J. Ballet,   P. Laurent,   J. Paul,   L. Salotti,   L. Natalucci,   M. Niel,   J. P. Roques,   P. Mandrou,  

 

期刊: AIP Conference Proceedings  （AIP Available online 1991）
卷期: Volume 232, issue 1  

页码: 29-41

 

ISSN:0094-243X

 

年代: 1991

 

DOI:10.1063/1.40947

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The most important results of the Galactic Center observations by GRANAT during 1990 are: discovery of new very hard X‐ray source GRS1758–258 in 40 arcmin from GX5‐1, strong variability of Sgr A* in 4–30 keV energy range, unambiguous detection of 1E1740.7–2942 as the brightest hard X‐ray source in the vicinity of the Galactic Center and discovery of the variable hard component in its spectrum. The shape of the latter allows one to suppose the relation of this component with electron‐positron annihilation. The hardness of the spectra of both 1E1740.7–2942 and GRS1758–258 gives strong arguments to include them to the list of black hole candidates.

 

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