首页   按字顺浏览 期刊浏览 卷期浏览 High energy observations of GX1+4 with the SIGMA imaging telescope
High energy observations of GX1+4 with the SIGMA imaging telescope

 

作者: D. Barret,   S. Mereghetti,   L. Natalucci,   J. P. Roques,   P. Laurent,   J. Ballet,   B. Cordier,   A. Lambert,   E. Churazov,   M. Gilfanov,   A. Kusnetzov,   R. Sunyaev,   I. Chulkov,   A. Dyachkov,   N. Khavenson,   B. Novikov,  

 

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

页码: 42-44

 

ISSN:0094-243X

 

年代: 1991

 

DOI:10.1063/1.40917

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The x‐ray pulsar GX1+4, located near the galactic center, is a candidate for the 511 keV line source observed from this region of sky. Recent results suggest that GX1+4 is returning to a state similar to that observed during the seventies, when also the 511 keV point source in the galactic center was active. Here we present the results of SIGMA observations of GX1+4 in the energy range 35 keV–1.3 MeV, indicating a decrease in the spin‐down rate. The SIGMA unprecedented angular resolution in this energy range allows us to place an upper limit on the 511 keV flux from this particular source.

 

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