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New observations with the gamma ray imager sigma
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Vedrenne, G. Roques, J. P. |
| Copyright Year | 1992 |
| Description | Results from the use of the gamma ray telescope SIGMA are given. An identification and an extensive study was done of sources contributing to the emission of the Galactic center region above 30 keV. A strong line was observed at 480 keV from Nova Muscae, which may be interpreted as an annihilation line with a redshift due to the presence of a compact object. The soft x-ray tails observed by SIGMA in some transient sources already identified as soft x-ray transients might be a common characteristic of these objects and has to be explained. The unusual spectrum of NGC4151 with a break around 50 keV can characterize a particular state of this kind of object. If it is the case, it has interesting implications for the origin of the Cosmic Diffuse Background. |
| File Size | 556579 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920012649 |
| Archival Resource Key | ark:/13960/t1ng9jx2w |
| Language | English |
| Publisher Date | 1992-02-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Gamma Rays Annihilation Reactions Galactic Structure Red Shift X Rays Gamma Ray Telescopes Galaxies Gamma Ray Observatory Gamma Ray Bursts Data Bases Gamma Ray Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
