{
  "bibcode": "2012GCN.13895....1A",
  "body": "M. Asada, H. Negoro (Nihon U.), M. Serino (RIKEN), M. Morii  (Tokyo Tech), \nNakahira (JAXA), K. Yamaoka (Waseda U.), S. Ueno, H. Tomida, M. Ishikawa (JAXA),\nT. Mihara, M. Sugizaki, T. Yamamoto, J. Sugimoto, M. Matsuoka (RIKEN), \nN. Kawai, R. Usui, K. Ishikawa, T. Yoshii  (Tokyo Tech),\nA. Yoshida (AGU), H. Tsunemi, M. Kimura (Osaka U.), \nM. Nakajima (Nihon U.), \nY. Ueda, K. Hiroi, M. Shidatsu, R. Sato (Kyoto U.),\nY. Tsuboi, M. Higa (Chuo U.)\nM. Yamauchi, Y. Nishimura, T. Hanayama, K. Yoshidome (Miyazaki U.)\nreport on behalf of the MAXI team:\n\nAt 2012-10-25T07:46:30 UT, the MAXI/GSC nova alert system triggered\non a bright uncatalogued X-ray transient source.\nThe transient emission lasted at least 20 seconds\nwithin the 44 second long triangular transit response of\nMAXI/GSC. We identify this event as GRB 121025A.\n\nAssuming that the source flux was constant over the transit,\nwe obtain the source position at\n\n (R.A., Dec) = (248.75 deg, +27.73 deg) = (16 35 00, +27 44 05)(J2000)\n\nwith a 90% C.L. statistical error of 0.27 deg and an additional systematic uncertainty\nof 0.1 deg (90% containment radius). The 4-10 keV flux was  129 (+26/-22) mCrab.\n\nWithin the scan transit, the variability of the source was marginally detected with a chance \nprobability of 0.084 for 4 - 10 keV band.\n\nThere was no significant excess flux in the previous transit at 06:13 UT and \nin the next transit at 09:18 UT with an upper limit of 20 mCrab for each.\n\nFollow-up observations are encouraged.",
  "circularId": 13895,
  "createdOn": 1351162220000,
  "email": "morii@hp.phys.titech.ac.jp",
  "subject": "GRB 121025A: MAXI/GSC detection",
  "submitter": "Mikio Morii at Tokyo Inst Tech  <morii@hp.phys.titech.ac.jp>",
  "eventId": "GRB 121025A"
}