TITLE:   GCN CIRCULAR
NUMBER:  21456
SUBJECT: LIGO/Virgo G296853 : MAXI/GSC observations
DATE:    17/08/11 11:48:06 GMT
FROM:    Satoshi Sugita at Tokyo Inst. of Tech.  <sugita@hp.phys.titech.ac.jp>

S. Sugita, N. Kawai (Tokyo Tech), M. Serino (RIKEN), H. Negoro (Nihon U.),
S. Ueno, H. Tomida, M. Ishikawa, Y. Sugawara, N.Isobe, R. Shimomukai (JAXA),
T. Mihara, M. Sugizaki, S. Nakahira, W. Iwakiri, M. Shidatsu, M.
Matsuoka (RIKEN),
T. Yoshii, Y. Tachibana, S. Harita, Y. Muraki, K. Morita (Tokyo Tech),
A. Yoshida, T. Sakamoto, Y. Kawakubo, Y. Kitaoka, T. Hashimoto (AGU),
H. Tsunemi, T. Yoneyama (Osaka U.),
M. Nakajima, T. Kawase, A. Sakamaki (Nihon U.),
Y. Ueda, T. Hori, A. Tanimoto, S. Oda (Kyoto U.),
Y. Tsuboi, Y. Nakamura, R. Sasaki (Chuo U.),
M. Yamauchi, C. Hanyu, K, Hidaka (Miyazaki U.),
T. Kawamuro (NAOJ),
K. Yamaoka (Nagoya U.)
report on behalf of the MAXI team:

We examined the MAXI/GSC all-sky X-ray images (2-20 keV) obtained
in the orbit and the day after the LVC trigger
G296853 at 2017-08-09 08:28:21.747 UTC (GCN 21431).

At the trigger time of G296853,
the high-voltage of MAXI/GSC was off,
and it was turned on at T0+1114 sec.
GSC scanned more than 83% of the whole sky in the 92-min orbit,
which includes 92.7% of the 90% region in the bayestar skymap
scanned from 08:49:51 to 09:00:11 UTC (T0+1289 to 1909 sec).
One day image obtained between 08-09 08:49:51 and 08-10 08:09:40 UTC
covers 100% of the 90% region in the bayestar skymap.
No significant new source was found in these images.
The 2-20 keV 1-sigma (3-sigma) averaged upper limits obtained
from the one-orbit and one-day images in the bayestar skymap are
12(36) and 3(9) mCrab, respectively.

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