| タイトル | X-ray observations of the Galactic center by Spartan 1 |
| 著者（英） | Kawai, N.; Fenimore, E. E.; Fritz, G. G.; Cruddace, R. G.; Middleditch, J. |
| 著者所属（英） | Los Alamos National Lab.|Hulburt (E. O.) Center for Space Research |
| 発行日 | 1988-07-01 |
| 言語 | eng |
| 内容記述 | The results of Spartan 1 X-ray observations of the region within 1.25 deg of the Galactic center are presented. Four strong, hard X-ray point sources were detected: A1742-294, 1E 1740.7-2942, IE 1743.1-2843, and a new source SP 1744.2-2959 about 0.5 deg southeast of A1742-294. The new source had an intensity about 20 percent of that of A1742-294 and was relatively hard, having spectral parameters close to those of the diffuse source and of the Galactic bulge source GX 3+1. The Galactic nucleus X-ray source appears to have been a factor of four fainter during the 1985 Spartan 1 observations than during the 1979 Einstein observations. Hard, diffuse X-ray emission centered near the Galactic center, about 1 deg in extent, aligned to within 20 deg of the Galactic equator, and having a maximum 2-10 keV brightness of 1.5 x 10 to the -6th ergs/sq cm/s/sr was detected, as were two weaker point sources about 0.1 deg northeast and southeast of the Galactic nucleus, embedded in the diffuse emission. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 88A44373 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/370020 |
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