GRB 220210A: AGILE detection
Abstract
The AGILE satellite detected the long GRB 220210A at T0 = 2022-02-10 23:56:38.40 +/- 0.01 s (UTC), reported by Fermi GBM (GCN #31568) and Swift BAT (GCN #31572). The burst is clearly visible in the AGILE scientific ratemeters of the MiniCALorimeter (MCAL; 0.4-100 MeV) and AntiCoincidence (AC; 50-200 keV) detectors. The event lasted about 1.9 s (in the 0.4-100 MeV energy range) and it released a total number of 2110 counts in the MCAL detector (above a background rate of 1230 Hz), and 3910 counts in the AC detector (above a background rate of 3330 Hz). The AGILE ratemeters light curves can be found at http://www.agilescienceapp.it/notices/GRB220210A_AGILE_RM.png . The event also triggered a high time resolution MCAL data acquisition, which released 1440 counts in the detector, above a background rate of 505 Hz. The time-integrated spectrum of the burst, from T0-0.19 s to T0+1.73 s, can be fitted in the energy range 0.4-5 MeV with a power-law with ph.ind. = -1.81 (-0.19,+0.21), resulting in a reduced chi-squared of 1.18 (36 d.o.f.) and a fluence of 3.40e-06 erg/cm^2 (90% confidence level), in the same energy range. The MCAL light curve can be found at http://www.agilescienceapp.it/notices/076950_GRB_571622198.404213.png . At the T0, the event was 15 deg off-axis. Additional analysis of AGILE data is in progress. Automatic MCAL GRB alert Notices can be found at: https://gcn.gsfc.nasa.gov/agile_mcal.html.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- February 2022
- Bibcode:
- 2022GCN.31575....1U