[vsnet-grb-info 22338] LIGO-Virgo S190510g: AGILE MCAL observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  24437
SUBJECT: LIGO-Virgo S190510g: AGILE MCAL observations
DATE:    19/05/10 05:26:58 GMT
FROM:    Alessandro Ursi at INAF/IAPS  <alessandro.ursi at gmail.com>

A. Ursi (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR), M. Tavani
(INAF/IAPS, and Univ. Roma Tor Vergata), M. Cardillo, C. Casentini, G.
Piano (INAF/IAPS), F. Lucarelli, C. Pittori (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:

In response to the LIGO-Virgo GW event S190510g at T0 = 2019-05-10 02:59:39
(UT), a preliminary analysis of the AGILE MiniCALorimeter (MCAL) triggered
data found no event candidates within a time interval covering -/+ 15 sec
from the LIGO-Virgo T0.

At the T0, about 90% of the S190510g 90% c.l. localization region was
accessible to the AGILE MCAL. Three-sigma upper limits (ULs) are obtained
for a 1 s integration time at different celestial positions within the
accessible S190510g localization region, from a minimum of 1.30E-06 erg
cm^-2 to a maximum of 3.22E-06 erg cm^-2 (assuming as spectral model a
single power law with photon index 1.5).

The AGILE MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the
energy range 0.4-100 MeV. Additional analysis of AGILE data is in progress.