[vsnet-grb-info 20225] GRB 180111A: AGILE/MCAL detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22321
SUBJECT: GRB 180111A: AGILE/MCAL detection
DATE:    18/01/12 00:02:25 GMT
FROM:    Francesco Verrecchia at ASDC  <francesco.verrecchia at ssdc.asi.it>

F. Verrecchia (SSDC and INAF/OAR), A. Trois (INAF/OA-Cagliari), A.Ursi
(INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata),
N. Parmiggiani (INAF/IASF-Bo), C. Pittori (SSDC and INAF/OAR), M. Marisaldi
(INAF/IASF-Bo and Bergen University), F. Longo (Univ. Trieste and INFN
Trieste), A. Bulgarelli (INAF/IASF-Bo), M. Cardillo (INAF/IAPS), F. Lucarelli
(SSDC and INAF/OAR), M. Pilia (INAF/OA-Cagliari), G. Piano (INAF/IAPS),
I. Donnarumma (ASI), G. Minervini, A. Argan, Y. Evangelista (INAF/IAPS),
V. Fioretti, F. Fuschino (INAF/IASF-Bo), A. Giuliani (INAF/IASF-Mi),
report on behalf of the AGILE Team:

The AGILE Mini-CALorimeter (MCAL) detected at T0 = 2018-01-11 16:42:06.0
+/- 0.02 UTC the long GRB 180111A reported by Swift (Lien et al., GCN 22318),
in the acquired data interval (following an internal trigger) started at
T1=16:42:05.50 UTC and ended at 16:42:12.40 UTC.
The MCAL light curve shows three main peaks starting at T0-0.15 s till ~6 s,
with the main part within T0-0.10 s and T0+5.40 s. The main GRB interval
released a total number of ~5537 counts at E>400 keV in the detector, above
an average background rate of 18 counts/32ms.

The AGILE-MCAL detector has a full solid angle acceptance, and is operational
in the range 0.4 - 100 MeV.