LIGO/Virgo/KAGRA S231021az: Coverage and upper limits from MAXI/GSC observations
Abstract
We examined MAXI/GSC all-sky X-ray images (2-20 keV) after compact binary merger candidate S231021az at 2023-10-21 23:37:57 UTC . At the trigger time of S231021az, the high-voltage of MAXI/GSC was on. The instantaneous field of view of GSC at the GW trigger time covered 1% of the 90% credible region of the bayestar sky map, in which we found no significant new X-ray source. The first one-orbit (92 min) scan observation with GSC after the event covered 86% of the 90% credible region of the bayestar skymap from 23:37:57 to 01:09:53 UTC (T0+0 to T0+5516 sec). No significant new source was found in the region in the one-orbit scan observation. A typical 1-sigma averaged upper limit obtained in one scan observation is 20 mCrab at 2-20 keV. If you require information about X-ray flux by MAXI/GSC at specific coordinates, please contact the submitter of this circular by email.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- October 2023
- Bibcode:
- 2023GCN.34871....1H