MAXI/GSC observations of Swift J1843.5-0343
ATel #3114; T. Mihara, M. Sugizaki (RIKEN), H. Negoro (Nihon U.), Y. E. Nakagawa, M. Serino, T. Yamamoto, T. Sootome, M. Matsuoka (RIKEN), H. Tomida, S. Ueno, M. Kohama, M. Ishikawa (JAXA), N. Kawai, M. Morii, K. Sugimori, R. Usui, T. Toizumi (Tokyo Tech), A. Yoshida, K. Yamaoka, S. Nakahira (AGU), H. Tsunemi, M. Kimura, H. Kitayama (Osaka U.), M. Nakajima H. Ozawa, F. Suwa (Nihon U.), Y. Ueda, N. Isobe, S. Eguchi, K. Hiroi (Kyoto U.), A. Daikyuji (Miyazaki U.), Y. Tsuboi, T. Matsumura, A. Uzawa, K. Yamazaki, (Chuo U.), report on behalf of the MAXI team
on 19 Jan 2011; 13:38 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Mutsumi Sugizaki (sugizaki@riken.jp)
Subjects: X-ray, Transient, Variables
We analyzed MAXI/GSC data including the new Galactic transient, Swift
J1843.5-0343 (ATEL #3109), taken by the all-sky observation. The
source whose position is consistent with that of Swift J1843.5-0343,
had been detected since 2011 Jan. 8 (UT) (MJD 55569) with the
significance above 4 sigma in the 4-10 keV band. The light curve
shows the flux gradually increased prior to the MAXI detection and
remained at around 30 mCrab since Jan. 9. It could not be observed
due to the sun-angle limit on Jan. 14 and Jan. 15 including the day on
which Swift/BAT detected a rapid brightening (ATEL #3109). The
obtained fluxes were
Date (UT) flux and 1-sigma error in 4-10 keV band
Jan. 8 21 +- 4.8 mCrab
Jan. 9 29 +- 4.5
Jan. 10 22 +- 4.3
Jan. 11 33 +- 6.0
Jan. 12 18 +- 7.8
Jan. 13 40 +- 12
Jan. 16 56 +- 32
Jan. 17 29 +- 7.4
These values include the contribution of unresolved Galactic X-ray
emission whose level is about 8 mCrab and stable.
The latest MAXI/GSC light curve and image of the source are available
at the following URL:
http://maxi.riken.jp/top/index.php?cid=1&jname=J1843-037
