TITLE:   GCN CIRCULAR
NUMBER:  21083
SUBJECT: LIGO/Virgo G284239: MAXI/GSC observations
DATE:    17/05/10 13:14:06 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, N. Isobe, M. Ishikawa, Y. Sugawara (JAXA),
T. Mihara, M. Sugizaki, S. Nakahira, W. Iwakiri, M. Shidatsu, M.
Matsuoka (RIKEN),
T. Yoshii, Y. Tachibana, S. Harita, K. Morita, Y. Muraki (Tokyo Tech),
A. Yoshida, T. Sakamoto, Y. Kawakubo, Y. Kitaoka (AGU),
H. Tsunemi, T. Yoneyama (Osaka U.),
M. Nakajima, A. Sakamaki, T. Kawase (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.),
K. Yamaoka (Nagoya U.),
T. Kawamuro (NAOJ)

We examined the MAXI/GSC all-sky X-ray images (2-20 keV) obtained
in the orbit and the day after the LVC trigger
G284239 at 2017-05-02 22:26:07.910 UTC (GCN 21060).

MAXI/GSC scanned more than 88%
of the whole sky in the 92-min orbit, which includes 81.2% of the
90% regions in the LIB_skymap.
One day image covers 100% of the 90% regions
in the LIB_skymap.
No significant new source was found in these images.
The upper limits for the X-ray flux are different depending
on the part of the sky.
For instance, typical 2-20 keV 1-sigma (3-sigma) upper limits obtained
from the one-orbit and one-day images are
11(33) mCrab and  4(12) 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.