TITLE:   GCN CIRCULAR
NUMBER:  41610
SUBJECT: LIGO/Virgo/KAGRA S250830bp: Coverage and upper limits from MAXI/GSC observations
DATE:    25/08/30 14:05:37 GMT
FROM:    Satoshi Sugita at Aoyama Gakuin U. <sugita@phys.aoyama.ac.jp>

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

We examined MAXI/GSC all-sky X-ray images (2-20 keV)
after compact binary merger candidate S250830bp at 2025-08-30 10:24:18.852 UTC (GCN 41606, 41607).

At the trigger time of S250830bp, the high-voltage of MAXI/GSC was on,
but the FOV was out of the 90% credible region of the Bilby skymap.
The credible region was observed about 3 minutes before the GW trigger time with GSC, and 
the first one-orbit (92 min) scan observation after the event covered 100%
of the 90% credible region from 11:52:34 to 11:53:19 UTC (T0+5296 to T0+5341 sec).

No significant new source was found in the region in those observations.
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.