{
  "bibcode": "2017GCN.22118....1S",
  "body": "GRB 171112A: MAXI/GSC detection\n\nS. Sugita (Tokyo Tech), H. Negoro (Nihon U.), S. Nakahira (RIKEN), \nS. Ueno, H. Tomida, M. Ishikawa, Y. Sugawara, N. Isobe, R. Shimomukai (JAXA),\nT. Mihara, M. Sugizaki, W. Iwakiri, M. Shidatsu, F. Yatabe, Y. Takao, M. Matsuoka (RIKEN), \nN. Kawai, T. Yoshii, Y. Tachibana, S. Harita, Y. Muraki, K. Morita (Tokyo Tech), \nA. Yoshida, T. Sakamoto, M. Serino, Y. Kawakubo, Y. Kitaoka, T. Hashimoto (AGU), \nH. Tsunemi, T. Yoneyama (Osaka U.), \nM. Nakajima, T. Kawase, A. Sakamaki (Nihon U.),\nY. Ueda, T. Hori, A. Tanimoto, S. Oda, T. Morita, S. Yamada (Kyoto U.), \nY. Tsuboi, R. Sasaki, Y. Nakamura, H. Kawai (Chuo U.), \nM. Yamauchi, C. Hanyu, K, Hidaka (Miyazaki U.), \nT. Kawamuro (NAOJ), \nK. Yamaoka (Nagoya U.) \n\nThe MAXI/GSC nova alert system triggered a bright uncatalogued X-ray transient source \nat 20:50:01 UT on 2017 November 12. \nAssuming that the source flux was constant over the transit,\nwe obtain the source position at\n(R.A., Dec) = (20.467 deg, -59.678 deg) = (01 21 52, -59 40 40) (J2000) \nwith a statistical 90% C.L. elliptical error region \nwith long and short radii of 0.17 deg and 0.12 deg, respectively. \nThe roll angle of long axis from the north direction is 107.0 deg counterclockwise. \nThere is an additional systematic uncertainty of 0.1 deg (90% containment radius).\n\nWe estimated a rectangular error box for the transient source with the following corners\nwhich were independently calculated with respect to each camera.\ncamera 2:\n(20.320, -61.117) deg = (01 21 16, -61 07 01) (J2000)\n(19.513, -61.013) deg = (01 18 03, -61 00 47) (J2000)\n(21.134, -58.662) deg = (01 24 32, -58 39 42) (J2000)\n(21.890, -58.756) deg = (01 27 33, -58 45 23) (J2000)\ncamera 7:\n(19.831, -60.456) deg = (01 19 19, -60 27 20) (J2000)\n(19.396, -60.398) deg = (01 17 35, -60 23 51) (J2000)\n(20.488, -58.842) deg = (01 21 57, -58 50 31) (J2000)\n(20.905, -58.897) deg = (01 23 37, -58 53 48) (J2000)\nThere is an additional systematic uncertainty of 0.1 deg (90% containment radius).\n\nThe X-ray flux averaged over the scan was 437 +- 44 mCrab\n(4.0-10.0keV, 1 sigma error).\nThere was no significant excess flux in the previous transit at UT 19:14\nand in the next transit at UT 22:19:10 with an upper limit of 20 mCrab for each.",
  "circularId": 22118,
  "createdOn": 1510566995000,
  "email": "negoro@phys.cst.nihon-u.ac.jp",
  "subject": "GRB 171112A: MAXI/GSC detection",
  "submitter": "H. Negoro at Nihon U.  <negoro@phys.cst.nihon-u.ac.jp>",
  "eventId": "GRB 171112A"
}