LIGO/Virgo S231113bw: upper limits from AGILE/MCAL
Abstract
In response to the LIGO/Virgo GW event S231113bw at T0 = 2023-11-13 20:04:17.06 (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 65% of the S231113bw 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 S231113bw localization region in the 0.4-1 MeV energy range, from a minimum of 1.3E-06 erg cm^-2 to a maximum of 7.3E-06 erg cm^-2 (assuming as spectral model a single power-law with photon index 1.5). An independent procedure based on photon counting statistics provides UL fluences in the same band, for a 300 microseconds integration time, from a minimum of 1.0E-08 erg cm^-2 to a maximum of 4.4E-08 erg cm^-2. 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.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- November 2023
- Bibcode:
- 2023GCN.35024....1F