MAXI/GSC detection of a new outburst from RX J1709.5-2639 (XTE J1709-267)
ATel #14047; R. Adachi (Tokyo Tech), R. Takagi, H. Negoro, M. Nakajima, M. Aoki, K. Kobayashi, K, Asakura, K, Seino (Nihon U.), T. Mihara, C. Guo, Y. Zhou, T. Tamagawa, M. Matsuoka (RIKEN), T. Sakamoto, M. Serino, S. Sugita, H. Nishida, A. Yoshida (AGU), Y. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, Y. Okamoto, S. Kitakoga (Chuo U.), M. Shidatsu (Ehime U.), N. Kawai, M. Niwano (Tokyo Tech), S. Nakahira, Y. Sugawara, S. Ueno, H. Tomida, M. Ishikawa, M. Tominaga, T. Nagatsuka (JAXA), Y. Ueda, S. Yamada, S. Ogawa, K. Setoguchi, T. Yoshitake (Kyoto U.), H. Tsunemi (Osaka U.), M. Yamauchi, K. Kurogi, K. Miike (Miyazaki U.), T. Kawamuro (NAOJ), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU), and M. Sugizaki (NAOC)
on 28 Sep 2020; 09:34 UT
Credential Certification: Hitoshi Negoro (negoro@phys.cst.nihon-u.ac.jp)
Subjects: X-ray, Neutron Star, Transient
Referred to by ATel #: 16283
At 15:32 UT on 2020 September 25, the MAXI/GSC nova alert system triggered on a soft X-ray transient positionally consistent with the recurrent neutron-star X-ray nova RX J1709.5-2639 (XTE J1709-267). The source flux has been increasing since September 25 and reached approximately 100 mCrab in the 2-10 keV band on September 28.
The source has exhibited an outburst every 2-3 years since 2004 (ATel #2729, #4304, #5319, #5332, #9108, #9181, #10671), and this is the 6th outburst which MAXI detected since 2009. The last outburst was in 2017 (ATel #10671). It usually takes less than 10 days to reach a peak flux of about 10 to 800 mCrab.
MAXI data for XTE J1709-267
