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. View this GCN Circular online at https://gcn.nasa.gov/circulars/36792. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...