[vsnet-grb-info 20643] AGILE/MCAL detection of GRB 180529 and a possible precursor

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22741
SUBJECT: AGILE/MCAL detection of GRB 180529 and a possible precursor
DATE:    18/05/29 11:19:15 GMT
FROM:    Andrea Giuliani at IASF/INAF  <giuliani at iasf-milano.inaf.it>

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

The AGILE Mini-CALorimeter (MCAL) detected a burst at T0 = 2018-05-29
08:29:14.72 +/- 0.01 s (UTC), lasting about ~ 1.9 s. The burst was detected
following a possible associated single-peak brief precursor, occurring
about 2 s before, at T0 = 2018-05-29 08:29:12.58 +/- 0.01 s (UTC) and
lasting ~ 4 ms. The light curve of the main burst is composed of several
peaks and released a total of ~2200 counts at E> 400 keV in the detector,
above an average background rate of 23 counts / 32 ms.

Further analysis is still in progress.

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