TITLE:   GCN CIRCULAR
NUMBER:  39111
SUBJECT: LIGO/Virgo/KAGRA S250201i: Coverage and upper limits from MAXI/GSC observations
DATE:    25/02/01 06:33:44 GMT
FROM:    Satoshi Sugita at Aoyama Gakuin U. <sugita@phys.aoyama.ac.jp>

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

We examined MAXI/GSC all-sky X-ray images (2-20 keV)
after compact binary merger candidate S250201i at 2025-02-01 02:08:41.292 UTC.

At the trigger time of S250201i, the high-voltage of MAXI/GSC was off,
and it was turned on at T0+844 sec (+14.1 min).
The first one-orbit (92 min) scan observation with GSC after the event covered 98%
of the 90% credible region of the bayestar skymap from 03:09:42 to 03:22:16 UTC (T0+3661 to T0+4415 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.