GRB 190829A: AGILE ratemeters detection and MCAL upper limits
Abstract
AGILE observed the long GRB 190829A at T0 = 2019-08-29 19:55:53 (UT) first reported by Fermi GBM (GCN 25551) and by Swift (GCN 25552). The scientific ratemeters of the Anti-Coincidence (50-200 keV) and Super-AGILE (SA; 18-60 keV) detected the burst. The GRB 190829A was also seen at VHE gamma-ray energy by H.E.S.S.(GCN 25566). The GRB location was fully accessible to the AGILE MCAL, but no trigger occured around +/- 100 sec from T0. Three-sigma upper limits (ULs) are obtained for a 1 s integration time at different celestial positions from a minimum of 1.16E-06 erg cm^-2 to a maximum of 1.36E-06 erg cm^-2 (assuming as spectral model a single power law with photon index 1.5). The AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the energy range 0.4-100 MeV. The GRB 190829A position has optimal exposure also in the AGILE field of View of the Gamma-Ray Imaging Detector (GRID) and further analyses are still in progress.
- Publication:
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GRB Coordinates Network
- Pub Date:
- August 2019
- Bibcode:
- 2019GCN.25577....1P