GCN Circular 25578
Subject
GRB 190829A: AGILE-GRID upper limits
Date
2019-08-30T14:42:21Z (6 years ago)
From
Giovanni Piano at INAF-IAPS <giovanni.piano@inaf.it>
G. Piano (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR), M. Tavani
(INAF/IAPS, and Univ. Roma Tor Vergata), C. Pittori (SSDC, and INAF/OAR),
A. Ursi, M. Cardillo, C. Casentini (INAF/IAPS), F. Lucarelli (SSDC, and
INAF/OAR),
A. Bulgarelli, V. Fioretti, N. Parmiggiani (INAF/OAS-Bologna), M. Pilia
(INAF/OA-Cagliari), F. Longo (Univ. Trieste, and INFN Trieste)
report on behalf of the AGILE Team:
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).
A sub-threshold gamma-ray source (at about 2.5 sigma) was found by
integrating the AGILE-GRID data from T0 to T0 + 100 s.
The following preliminary GRID values of 3-sigma upper limits (ULs) are
obtained above 50 MeV:
- 5.5e-08 erg cm^-2 s^-1 over the time interval (T0; T0 + 100 s);
- 1.9e-09 erg cm^-2 s^-1 over the time interval (T0; T0 + 5 hr).
These measurements were obtained with AGILE observing a large portion of
the sky in spinning mode. Additional analysis of AGILE data is in progress.