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MAXI/GSC observation of Swift J164449.3+573451

ATel #3244; M. Kimura (Osaka U.), R. Goto, H. Negoro (Nihon U.), M. Sugizaki, M. Serino, T. Mihara, Y. E. Nakagawa, T. Yamamoto, T. Sootome, M. Matsuoka (RIKEN), N. Kawai, M. Morii, K. Sugimori, R. Usui (Tokyo Tech), K. Kawasaki, S. Ueno, H. Tomida, M. Kohama, M. Ishikawa (JAXA), A. Yoshida, K. Yamaoka, S. Nakahira (AGU), M. Nakajima, H. Ozawa, F. Suwa (Nihon U.), H. Tsunemi, H. Kitayama (Osaka U.) Y. Ueda, N. Isobe, S. Eguchi, K. Hiroi, M. Shidatsu(Kyoto U.), A. Daikyuji (Miyazaki U.), K. Yamazaki, A. Uzawa, T. Matsumura (Chuo U.), report on behalf of the MAXI team:
on 29 Mar 2011; 08:02 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Hitoshi Negoro (negoro@phys.cst.nihon-u.ac.jp)

Subjects: X-ray, Binary, Transient

Referred to by ATel #: 3250, 3251

MAXI/GSC observed the field of a new transient Swift J164449.3+573451 (Kennea et al. ATel#3242), initially reported as GRB110328A (Barthelmy et al. GCN #11824). The transit time (UT) and the observed flux in the 4-10 keV energy band on March 28, 2011 (MJD=55648) are shown below.

08:59 16+-23 mCrab
10:31 44+-22 mCrab
12:03 77+-28 mCrab
13:37 38+-24 mCrab

The source was not detected with MAXI/GSC at this location, at least, for the previous 5 days from MJD=55643 to 55647.
The latest light curve and image will be placed at the following URL:
http://maxi.riken.jp/top/index.php?cid=1&jname=J1644+575

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