2003/08/20 by A. von Kienlin, V. Beckmann, S. Covino +13 · 1 citation
Mathematics · Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Field of view #Fluence #Flux (metallurgy) #Gamma-ray burst #Gamma-ray bursts and supernovae #Geometry #Ibis #Materials science #Mathematics #Optics #Photon #Physics #Pulsars and Gravitational Waves Research #Spectral index #Spectral line #Triangulation #astro-ph
paper · pdf · doi:10.1051/0004-6361:20031232
published as Astron.Astrophys.411:L321-L326,2003 · 5 pages, 3 figures. Accepted for publication in A&AL (INTEGRAL issue)
arxiv created 2003/08/20 · openalex publication_date 2003/10/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
GRB 030320 is the 5th gamma-ray burst (GRB) detected by INTEGRAL in the field of view (FoV). It is so far the GRB with the largest off-axis angle with respect to the INTEGRAL pointing direction, near to the edge of the FoV of both main instruments, IBIS and SPI. Nevertheless, it was possible to determine its position and to extract spectra and fluxes. The GRB nature of the event was confirmed by an IPN triangulation. It is a ~60 s long GRB with two prominent peaks separated by ~35 s. The spectral shape of the GRB is best represented by a single power law with a photon index . The peak flux in the 20–200 keV band is determined to ~5.7 photons cm-2 s-1 and the GRB fluence to erg cm-2. Analysing the spectral evolution of the GRB, a “hard-to-soft” behaviour emerges. A search for an optical counterpart has been carried out, but none was found.