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MAXI/GSC detection of renewed activity of the neutron star X-ray binary MAXI J0556-332

ATel #8513; H. Negoro, M. Nakajima (Nihon U.), T. Fujiwara (Tokyo Tech) S. Ueno, H. Tomida, S. Nakahira, M. Ishikawa, Y. E. Nakagawa (JAXA), T. Mihara, M. Sugizaki, M. Serino, M. Shidatsu, J. Sugimoto, T. Takagi, M. Matsuoka (RIKEN), N. Kawai, M. Arimoto, T. Yoshii, Y. Tachibana, Y. Ono (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Kawakubo, H. Ohtsuki (AGU), H. Tsunemi, R. Imatani (Osaka U.), K. Tanaka, T. Masumitsu (Nihon U.), Y. Ueda, T. Kawamuro, T. Hori, A. Tanimoto (Kyoto U.), Y. Tsuboi, S. Kanetou, Y. Nakamura, R. Sasaki (Chuo U.), M. Yamauchi, D. Itoh, K. Furuya (Miyazaki U.), K. Yamaoka (Nagoya U.), M. Morii (ISM) report on behalf of the MAXI team
on 7 Jan 2016; 13:41 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Hitoshi Negoro (negoro@phys.cst.nihon-u.ac.jp)

Subjects: X-ray, Neutron Star, Transient

Referred to by ATel #: 8517, 8530, 8854

At 08:00 UT on 2016 January 6, the MAXI nova-alert system triggered faint X-ray enhancement at the position consistent with that of the neutron star X-ray binary MAXI J0556-332.

The MAXI/GSC light curve shows that the 2-20 keV X-ray flux has increased since the end of the last year, and reached 0.062 +/- 0.039 photons/cm2/s (~ 20 mCrab) on January 6.

MAXI J0556-332 was discovered on 2011 January 12 at a high galactic attitude (l ~ -25.2 deg, Matsumura et al. ATel #3102), and exhibited a long outburst lasting about 500 days (e.g., Sugizaki et al. 2013).

We encourage followup observations of this unique source.

Public Data Product of MAXI J0556-332