[vsnet-grb-info 24953] LIGO/VIRGO S200213t: upper limits from AGILE/MCAL observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27052
SUBJECT: LIGO/VIRGO S200213t: upper limits from AGILE/MCAL observations
DATE:    20/02/13 08:22:30 GMT
FROM:    Francesco Longo at U of Trieste,INFN Trieste  <franzlongo1969 at gmail.com>

F. Longo (Univ. Trieste, and INFN Trieste), C. Casentini, G. Piano
(INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata),
M. Cardillo, A. Ursi (INAF/IAPS), F. Lucarelli, C. Pittori, F. Verrecchia
(SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, N. Parmiggiani
(INAF/OAS-Bologna), M. Pilia (INAF/OA-Cagliari), report on behalf of
the AGILE Team:

In response to the LIGO/Virgo GW event S200213t at T0 = 2020-02-13
04:10:40.238 (UTC), a preliminary analysis of the AGILE mini calorimeter
(MCAL) triggered data found no event  candidates within a time interval
covering -/+ 15 sec from the LIGO/Virgo T0.

At the T0, about 96% of the S200213t 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 S200213t localization region, from a minimum of
1.6E-06 erg cm^-2 to a maximum of 7.5 E-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.