{
  "bibcode": "2015GCN.18062....1M",
  "body": "T. Masumitsu, H. Negoro, (Nihon U.), T. Sakamoto (AGU),\nS. Ueno, H. Tomida, S. Nakahira, M. Kimura, M. Ishikawa, \nY. E. Nakagawa (JAXA), T. Mihara, M. Sugizaki, M. Serino, M. Shidatsu, J. Sugimoto, \nT. Takagi, M. Matsuoka (RIKEN), N. Kawai, T. Yoshii, Y. Tachibana (Tokyo Tech), \nA. Yoshida, T. Sakamoto, Y. Kawakubo, H. Ohtsuki (AGU), H. Tsunemi, R.Imatani (Osaka U.), \nM. Nakajima, K. Tanaka (Nihon U.), Y. Ueda, T. Kawamuro, \nT. Hori (Kyoto U.), Y. Tsuboi, S. Kanetou (Chuo U.), M. Yamauchi, D. Itoh (Miyazaki U.), \nK. Yamaoka (Nagoya U.), M. Morii (ISM)\nreport on behalf of the MAXI team:\n\nThe MAXI/GSC nova alert system triggered a bright uncatalogued X-ray transient source \nat UT 08:45:00 UT. \nAssuming that the source flux was constant over the transit,\nwe obtain the source position at\n(R.A., Dec) = (220.422 deg, -2.421 deg) = (14 41 41, -02 25 15) (J2000) \nwith a statistical 90% C.L. elliptical error region \nwith long and short radii of 0.11 deg and 0.09 deg, respectively. \nThe roll angle of long axis from the north direction is 117.0 deg counterclockwise. \nThere is an additional systematic uncertainty of 0.1 deg (90% containment radius).\nThe X-ray flux averaged over the scan was 1491 +- 107 mCrab\n(4-10keV, 1 sigma error).\n\nWithout assumptions on the source constancy, we obtain a rectangular error\nbox for the transient source with the following corners:\n(R.A., Dec) = (220.229 deg, -2.781 deg) = (14 40 55, -02 46 51) (J2000)\n(R.A., Dec) = (220.058 deg, -2.639 deg) = (14 40 14, -02 38 20) (J2000)\n(R.A., Dec) = (220.615 deg, -2.060 deg) = (14 42 27, -02 03 36) (J2000)\n(R.A., Dec) = (220.786 deg, -2.201 deg) = (14 43 08, -02 12 04) (J2000)\nThere was no significant excess flux in the previous transit at 07:12 UT\nwith an upper limit of 20 mCrab.",
  "circularId": 18062,
  "createdOn": 1437817841000,
  "email": "negoro@phys.cst.nihon-u.ac.jp",
  "subject": "GRB 150725A: MAXI/GSC detection",
  "submitter": "H. Negoro at Nihon U.  <negoro@phys.cst.nihon-u.ac.jp>",
  "eventId": "GRB 150725A"
}