[vsnet-grb-info 24921] LIGO/Virgo S200208q: upper limits from AGILE/MCAL observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27020
SUBJECT: LIGO/Virgo S200208q: upper limits from AGILE/MCAL observations
DATE:    20/02/08 17:02:13 GMT
FROM:    Francesco Longo at U of Trieste,INFN Trieste  <franzlongo1969 at gmail.com>

F. Longo (Univ. Trieste, and INFN Trieste), M. Cardillo (INAF/IAPS),
M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. Casentini,
G. Piano, 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 S200208q at T0 = 2020-02-08
13:01:17.991 (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, 100% of the S200208q 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 S200208q localization
region, from a minimum of 1.4E-06 erg cm^-2 to a maximum of 6.6E-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.