LIGO/Virgo/KAGRA S230917af: MAXI/GSC observations
Abstract
We examined MAXI/GSC all-sky X-ray images (2-20 keV) after compact binary merger candidate S230917af at 2023-09-17 10:04:17 UTC . At the trigger time of S230917af, the high-voltage of MAXI/GSC was on, but the FOV was out of the 90% credible region of the cwb skymap. The first one-orbit (92 min) scan observation with GSC after the event covered 100% of the 90% credible region of the cwb skymap from 10:41:56 to 10:53:01 UTC (T0+2259 to T0+2924 sec). There was a low significance burst-like X-ray event at (R.A., Dec) = (333.784 deg, 39.435 deg) = (22 15 08, +39 26 06) (J2000) with a statistical 90% C.L. error region of ~0.6 deg. There is an additional systematic uncertainty of 0.1 deg (90% containment radius). The sources region was observed around 10:50:13 UTC. The X-ray flux averaged over the scan was 48 +- 13 mCrab (4.0-10.0keV, 1 sigma error). 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:
- September 2023
- Bibcode:
- 2023GCN.34723....1N