MAXI/GSC observation of the X-ray outburst from IGR J06074+2205
ATel #16394; M. Nakajima (Nihon U.), T. Mihara (RIKEN), H. Negoro, K. Kobayashi, M. Tanaka, Y. Soejima, Y. Kudo (Nihon U.), T. Kawamuro, S. Yamada, T. Tamagawa, N. Kawai, M. Matsuoka (RIKEN), T. Sakamoto, M. Serino, S. Sugita, H. Hiramatsu, H. Nishikawa, A. Yoshida (AGU), Y. Tsuboi, S. Urabe, S. Nawa, N. Nemoto, E. Goto (Chuo U.), M. Shidatsu (Ehime U.), I. Takahashi, M. Niwano, S. Sato, N. Higuchi, Y. Yatsu (Tokyo Tech), S. Nakahira, S. Ueno, H. Tomida, M. Ishikawa, S. Ogawa, T. Kurihara (JAXA), Y. Ueda, K. Setoguchi, T. Yoshitake, Y. Nakatani, Y. Okada (Kyoto U.), M. Yamauchi, Y. Hagiwara, Y. Umeki, Y. Otsuki (Miyazaki U.), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU), M. Sugizaki (NAOC), W. Iwakiri (Chiba U.)
on 27 Dec 2023; 11:36 UT
Credential Certification: Motoki Nakajima (nakajima.motoki@nihon-u.ac.jp)
Subjects: X-ray, Binary, Neutron Star, Transient, Pulsar
The MAXI/GSC nova alert system triggered an X-ray transient source on 2023-12-26. Assuming that the source flux was constant over the transit, we obtain the source position at (R.A., Dec) = (91.966 deg, 22.073 deg) = (06 07 51, +22 04 22) (J2000) with a statistical 90% C.L. elliptical error region with long and short radii of 0.37 deg and 0.34 deg, respectively. The roll angle of long axis from the north direction is 114.0 deg counterclockwise. There is an additional systematic uncertainty of 0.1 deg (90% containment radius). The X-ray flux averaged over the scan was 38 +- 7 mCrab.
This position is consistent with the Be/X-ray binary pulsar IGR J06074+2205. As predicted by the previous report (ATel#16351), the X-ray outburst recurred within a 2-day error. Thus we have confirmed the recurrent period of this source of about 80 days.
The next outburst is expected to occur around 2024-03-15, if the optical companion is still active.
