TITLE:   GCN CIRCULAR
NUMBER:  36792
SUBJECT: LIGO/Virgo/KAGRA S240629by: Coverage and upper limits from MAXI/GSC observations
DATE:    24/06/30 01:06:11 GMT
FROM:    Satoshi Sugita at Aoyama Gakuin U. <sugita@phys.aoyama.ac.jp>

M. Nakajima, H. Negoro, K. Takagi (Nihon U.),
N. Kawai, T. Mihara, (RIKEN),
S. Sugita, M. Serino, Y. Kawakubo, H. Hiramatsu, H. Nishikawa, 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 S240629by at 2024-06-29 14:52:56.859 UTC (GCN 36784).

At the trigger time of S240629by, the high-voltage of MAXI/GSC was off,
and it was turned on at T0+1589 sec (+26.5 min).
The first one-orbit (92 min) scan observation with GSC after the event covered 80%
of the 90% credible region of the bayestar skymap (bayestar.multiorder.fits,1) from 15:39:13 to 15:41:23 UTC (T0+2777 to T0+2907 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.