TITLE:   GCN CIRCULAR
NUMBER:  24530
SUBJECT: LIGO/Virgo S190513bm: MAXI/GSC Observations
DATE:    19/05/14 03:04:41 GMT
FROM:    Motoko Serino at RIKEN/MAXI  <motoko@crab.riken.jp>

M. Serino, S. Sugita (AGU), H. Negoro (Nihon U.), M. Sugizaki, N. Kawai (Tokyo Tech),
M. Nakajima, W. Maruyama, M. Aoki, K. Kobayashi (Nihon U.),
S. Nakahira, T. Mihara, T. Tamagawa, M. Matsuoka (RIKEN),
T. Sakamoto, H. Nishida, A. Yoshida (AGU),
Y. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, T. Sato (Chuo U.),
M. Shidatsu (Ehime U.),
Y. Tachibana, K. Morita, M. Oeda, K. Shiraishi (Tokyo Tech),
S. Ueno, H. Tomida, M. Ishikawa, Y. Sugawara, N. Isobe, R. Shimomukai, M. Tominaga (JAXA),
Y. Ueda, A. Tanimoto, T. Morita, S. Yamada, S. Ogawa (Kyoto U.),
H. Tsunemi, T. Yoneyama, K. Asakura, S. Ide (Osaka U.),
M. Yamauchi, S. Iwahori, Y. Kurihara (Miyazaki U.),
T. Kawamuro (NAOJ), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU) 
report on behalf of the MAXI team:

We examined the MAXI/GSC all-sky X-ray images (2-20 keV) obtained
in the orbit after the LVC trigger
S190513bm at 2019-05-13 20:54:28.747 UTC (GCN 24522).

At the trigger time of S190513bm, the high-voltage of MAXI/GSC was on, 
and it was turned off at T0+864 sec (+14.4 min).
The instantaneous field of view of GSC at the GW trigger time covered 4% of the 90% credible region
of the bayestar sky map, in which we found no significant new X-ray source.
The one-orbit (92 min) scan of GSC covered 87% of the 90% credible region 
of the bayestar skymap.
The scan was mainly performed by the degraded GSC_3 camera.

No significant new source was found in the error region with the one-orbit scan.
The 1-sigma averaged upper limit obtained 
from the scan was 50 mCrab at 2-10 keV.

If you require information of X-ray flux by MAXI/GSC at specific coordinates,
please contact the submitter of this circular by email.