A Comprehensive Search for Gamma-Ray Lines in the First Year of Data from the INTEGRAL Spectrometer
| dc.creator | Teegarden, B. J. | |
| dc.creator | Watanabe, K. | |
| dc.date | 2006-04-12 | |
| dc.date.accessioned | 2026-07-07T10:43:48Z | |
| dc.date.available | 2026-07-07T10:43:48Z | |
| dc.description | We have carried out an extensive search for gamma-ray lines in the first year of public data from the Spectrometer (SPI) on the INTEGRAL mission. INTEGRAL has spent a large fraction of its observing time in the Galactic Plane with particular concentration in the Galactic Center (GC) region (~ 3 Msec in the first year). Hence the most sensitive search regions are in the Galactic Plane and Center. The phase space of the search spans the energy range 20-8000 keV and line widths from 0-1000 keV (FWHM). It includes both diffuse and point-like emission. We have searched for variable emission on time scales down to ~ 1000 sec. Diffuse emission has been searched for on a range of different spatial scales from ~ 20 deg (the approximate field-of-view of the spectrometer) up to the entire Galactic Plane. Our search procedures were verified by the recovery of the known gamma-ray lines at 511 keV and 1809 keV at the appropriate intensities and significances. We find no evidence for any previously unknown gamma-ray lines. The upper limits range from a few x 10^-5 cm^-2 s^-1 to a few x 10^-2 cm^-2 s^-1 depending on line width, energy and exposure; regions of strong instrumental background lines were excluded from the search. Comparison is made between our results and various prior predictions of astrophysical lines. | |
| dc.description | Accepted for publication in ApJ | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0604277 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0604277 | |
| dc.identifier | Astrophys.J.646:965-981,2006 | |
| dc.identifier | doi:10.1086/504967 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/182373 | |
| dc.subject | Astrophysics | |
| dc.title | A Comprehensive Search for Gamma-Ray Lines in the First Year of Data from the INTEGRAL Spectrometer | |
| dc.type | text |