GRB 210610B: AGILE detection
Abstract
The AGILE satellite detected the long GRB 210610B at T0 = 2021-06-10 19:51:32 s (UTC), reported by Swift (GCNs #30170, #30189). The burst is clearly visible in the AGILE scientific ratemeters of the SuperAGILE (SA; 20-60 keV), MiniCALorimeter (MCAL; 0.4-100 MeV), and AntiCoincidence (AC; 50-200 keV) detectors. The event lasted about 30 s and it released a total number of 2340 counts in the SA detector (above a background rate of 65 Hz), 37190 counts in the MCAL detector (above a background rate of 1280 Hz), and 110300 counts in the AC detector (above a background rate of 3800 Hz). The AGILE ratemeter light curves can be found at http://www.agilescienceapp.it/notices/GRB210610B_AGILE_RM.png . The event also triggered a partial high time resolution MCAL data acquisition, from T1 = 2021-06-10 19:51:22.88 s +/- 0.01 (UTC) to T2 = 2021-06-10 19:51:40.27 +/- 0.01 s (UTC), and released 11740 counts in the detector, above a background rate of 525 Hz. The MCAL light curve can be found at: http://www.agilescienceapp.it/notices/073428_GRB_MCAL_550439491.834857.png . The time-integrated spectrum between T1 and T2 can be fitted in the energy range 0.4-5 MeV with a power law model with ph.ind. -2.9 -0.33/+0.40. The fit results in a reduced chi-squared of 0.95 (36 d.o.f.) and a fluence of 8.06e-06 ergs/cm^2 (90% confidence level), in the same energy range. 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:
- June 2021
- Bibcode:
- 2021GCN.30195....1U