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GCN Circular 35017

LIGO/Virgo/KAGRA S231113bw: Coverage and upper limits from MAXI/GSC observations
2023-11-13T22:32:16Z (6 months ago)
Satoshi Sugita at Aoyama Gakuin U. <>
H. Nishikawa, S. Sugita, M. Serino, H. Hiramatsu,  Y. Kondo (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 S231113bw at 2023-11-13 20:04:17
UTC (GCN 35016).

At the trigger time of S231113bw, the high-voltage of MAXI/GSC was off,
and it was turned on at T0+285 sec (+4.8 min).
The first one-orbit (92 min) scan observation with GSC after the event
covered 53%
of the 90% credible region of the bayestar skymap from 20:09:15 to
21:34:10 UTC (T0+298 to T0+5393 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.

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