5 years of survey on the Crab Nebula with SPI/INTEGRAL
| dc.creator | Jourdain, E. | |
| dc.creator | Roques, J. P. | |
| dc.date | 2008-09-29 | |
| dc.date.accessioned | 2026-07-07T10:06:13Z | |
| dc.date.available | 2026-07-07T10:06:13Z | |
| dc.description | We present observations of the Crab Nebula above 20 keV by the SPI/INTEGRAL telescope during more than 5 years of operations. Our study demonstrates the stability of the instrument with time and allows a detailed analysis of the emission observed from the Crab Nebula between 20 keV and 1 MeV. The flux stability is discussed and serves a robust spectral shape analysis. We find that a single power law is clearly excluded since the photon spectrum presents a curvature in the considered energy domain. We have modelled it by a broken power law with the energy break fixed to 100 keV and determined the two photon indices together with the 100 keV flux for 9 periods between 2004 and 2008. The spectral shape of the Crab nebula is very stable as well as its intensity and connects nicely with previous measurements, at lower (X-rays) or higher (MeV) energies. | |
| dc.description | 6 pages; Submitted to PoS for publication in the 7th INTEGRAL workshop - An INTEGRAL View of Compact Objects Proceedings | |
| dc.identifier | https://arxiv.org/abs/0809.5018 | |
| dc.identifier | http://arxiv.org/abs/0809.5018 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/170253 | |
| dc.subject | Astrophysics | |
| dc.title | 5 years of survey on the Crab Nebula with SPI/INTEGRAL | |
| dc.type | text |