LIGO/Virgo S200128d: upper limits from AGILE/GRID observations
Abstract
In response to the LIGO-Virgo GW event S200128d at T0 = 2020-01-28 02:20:11.903 UTC a preliminary analysis of the AGILE data shows that no AGILE/MCAL and AGILE/GRID data were available at T0 due to a telemetry gap. We performed an analysis of the GRID data in the energy range 50 MeV - 10 GeV over time intervals before and after T0, where good exposure of the S200128d 90% c.l. LR was available. No candidate gamma-ray transient was detected. The following preliminary GRID value of 3-sigma upper limit (UL) is obtained: from 3.6e-08 to 3.4e-06 erg cm^-2 s^-1, with exposure of about 44% of the LR over the time interval ( T0 + 200 s ; T0 + 300 s ); These measurements were obtained with AGILE observing a large portion of the sky in spinning mode. Additional analysis of AGILE data is in progress.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- January 2020
- Bibcode:
- 2020GCN.26934....1V