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GCN Circular 26447

Subject
LIGO/Virgo S191215w: upper limits from AGILE/MCAL observations
Date
2019-12-16T08:28:35Z (4 years ago)
From
Maura Pillia at INAF <maura.pilia@inaf.it>
M. Pilia (INAF/OA-Cagliari), F. Verrecchia (SSDC, and INAF/OAR), M. Tavani
(INAF/IAPS, and Univ. Roma Tor Vergata), M. Cardillo, C. Casentini, G.
Piano, A. Ursi (INAF/IAPS), F. Lucarelli, C. Pittori (SSDC, and INAF/OAR),
A. Bulgarelli, V. Fioretti, N. Parmiggiani (INAF/OAS-Bologna), F. Longo
(Univ. Trieste, and INFN Trieste), report on behalf of the AGILE Team:

In response to the LIGO/Virgo GW event S191215w at T0 = 2019-12-15
22:30:52.333 (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 60% of the S191215w 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 S191215w localization region, from a minimum of 1.2E-06 erg
cm^-2 to a maximum of 1.6E-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.
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