2007/01/23 by Stephane Schanne, Stéphane Schanne, Schanne, Stephane +15
Physics and Astronomy · #Astro and Planetary Science #Astrophysics (astro-ph) #Atomic and Subatomic Physics Research #FOS: Physical sciences #Gamma-ray bursts and supernovae #Nuclear physics research studies #Particle physics theoretical and experimental studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0701640
4 pages, 8 figures. Accepted for publication in ESA SP-622 (Proceedings of the 6th INTEGRAL Workshop, Moscow, 2006 07 03-07)
arxiv created 2007/01/23 · openalex publication_date 2007/01/23 · arxiv updated 2009/12/01 · openalex created_date 2022/09/03 · openalex updated_date 2026/07/28
The Vela region is a promising target for the detection of 1.8 MeV gamma-rays emitted by the decays of radioactive 26Al isotopes produced in hydrostatic or explosive stellar nucleosynthesis processes. COMPTEL has claimed 1.8 MeV gamma-ray detection from Vela at a 3sigma level with a flux of 3.6 10-5 ph/cm2/s. In this paper, we present first results of our search for 1.8 MeV gamma-rays from Vela with the spectrometer SPI aboard INTEGRAL. Using the data set acquired during 1.7 Ms at the end of 2005 in the frame of our AO-3 open-time observation, we determine a flux of (6.5 ± 1.9(stat) ± 2.4(syst)) 10-5 ph/cm2/s from 26Al decays in the Vela region.