TITLE:   GCN CIRCULAR
NUMBER:  35019
SUBJECT: LIGO/Virgo/KAGRA S231113cd: Coverage and upper limits from MAXI/GSC observations
DATE:    23/11/14 01:30:52 GMT
FROM:    Motoko Serino at Aoyama Gakuin U. <serino@phys.aoyama.ac.jp>

Y. Kondo, S. Sugita, M. Serino, H. Hiramatsu, H. Nishikawa (AGU),
N. Kawai (RIKEN), H. Negoro, M. Nakajima (Nihon U.), 
T. Mihara (RIKEN), 
Y. Kawakubo (LSU) 
report on behalf of the MAXI team: 

We examined MAXI/GSC all-sky X-ray images (2-20 keV) 
after compact binary merger candidate S231113cd at 2023-11-13 22:12:17 UTC. 

At the trigger time of S231113cd, the high-voltage of MAXI/GSC was off, 
and it was turned on at T0+105 sec (+1.8 min). 
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 23:02:32 to 23:23:40 UTC (T0+3015 to T0+4283 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.