TITLE:   GCN CIRCULAR
NUMBER:  35593
SUBJECT: GRB 240122A: MAXI/GSC detection
DATE:    24/01/22 14:53:25 GMT
FROM:    Hitoshi Negoro at Nihon University/MAXI team <negoro.hitoshi@nihon-u.ac.jp>

H. Negoro (Nihon U.), W. Iwakiri (Chiba U.), M. Serino (AGU),
M. Nakajima, K. Kobayashi, M. Tanaka, Y. Soejima, Y. Kudo (Nihon U.),
T. Mihara, T. Kawamuro, S. Yamada, T. Tamagawa, N. Kawai, M. Matsuoka (RIKEN),
T. Sakamoto, S. Sugita, H. Hiramatsu, H. Nishikawa, A. Yoshida (AGU),
Y. Tsuboi, S. Urabe, S. Nawa, N. Nemoto, E.Goto (Chuo U.),
M. Shidatsu, Y. Niida (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), and M. Sugizaki (NAOC)


The MAXI/GSC nova alert system triggered on a faint uncatalogued X-ray transient source
at 10:28:03 UT on January 22, 2024.
Because our localization program did not run, we can not provide a precise error region.
The source position determined with the nova alert system (Negoro et al. 2016) is
(R.A., Dec) = (92.827 deg, -19.031 deg) = (06 11 18, -19 01 51) (J2000)
with an uncertainty of more than 30 arc-min. The burst duration is about 10 sec, and
the 2-10 keV X-ray flux around the peak was about 150 mCrab.
There was no significant excess flux in the previous transit at 08:55 UT
and in the next transit at 12:00 UT with an upper limit of 20 mCrab for each.