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GCN Circular 24245

LIGO-Virgo S190426c: AGILE MCAL observation
2019-04-26T18:52:06Z (5 years ago)
Martina Cardillo at INAF-IAPS <>
M.Cardillo , G.Piano, A. Ursi (INAF/IAPS), F. Verrecchia� (SSDC, and 
INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. 
Casentini, (INAF/IAPS), F. Lucarelli, C. Pittori,� (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 S190426c at T0 = 
2019-04-26T15:21:55.337 (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 S190426c� 90% 
c.l. localization region (that one which includes the Celestial North 
Pole),� from a minimum of 1.27e-6 erg cm^-2 to a maximum of 2.16e-6 erg 
cm^-2� (assuming as spectral model a single power law with photon index 

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 
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