[vsnet-grb-info 22081] LIGO-Virgo S190425z: AGILE MCAL observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  24180
SUBJECT: LIGO-Virgo S190425z: AGILE MCAL observation
DATE:    19/04/25 13:14:38 GMT
FROM:    Claudio Casentini at INAF-IAPS  <claudio.casentini at inaf.it>

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, 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 S190425z at T0 = 2019-04-25 08:18:05
(UT), a preliminary analysis of the AGILE minicalorimeter (MCAL) data found
no event candidates within a time interval covering +/- 100 sec from the
LIGO-Virgo T0.

Three-sigma upper limits (ULs) are obtained for a 1 s integration time at
different celestial positions within the accessible S190425z 90% c.l.
localization region (with R.A. in the approximate range between 1 - 8 hr),
from a minimum of 1.25E-06 erg cm^-2 to a maximum of 7.99E-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.
=======================================
Dr. Claudio Casentini, PhD
INAF IAPS - Istituto di Astrofisica e Planetologia Spaziali
Via del Fosso del Cavaliere 100
00133 Roma, Italy
Tel: (+39)3392319601
Email: claudio.casentini at roma2.infn.it
Email: claudio.casentini at inaf.it
Email/Skype: clavdio89 at hotmail.it