{
  "bibcode": "2014GCN.17077....1H",
  "body": "F. Honda, K. Fukushima, H. Negoro (Nihon U.), N. Kawai (Tokyo Tech), S. Nakahira (JAXA), \nM. Serino (RIKEN), S. Ueno, H. Tomida, M. Kimura, M. Ishikawa, Y. E. Nakagawa (JAXA), \nT. Mihara, M. Sugizaki, M. Morii, J. Sugimoto, T. Takagi, A. Yoshikawa, M. Matsuoka (RIKEN), \nY. Tachibana, T. Yoshii (Tokyo Tech), \nA. Yoshida, T. Sakamoto, Y. Kawakubo, H. Ohtsuki (AGU), \nH. Tsunemi, D. Uchida (Osaka U.), \nM. Nakajima, T. Onodera, K. Suzuki, T. Namba, M. Fujita (Nihon U.), \nY. Ueda, M. Shidatsu, T. Kawamuro, T. Hori (Kyoto U.), Y. Tsuboi, A. Kawagoe (Chuo U.), \nM. Yamauchi, Y. Morooka, D. Itoh (Miyazaki U.), K. Yamaoka (Nagoya U.)\n\nWe report the MAXI/GSC detection of GRB 141121A (Li et al. GCN 17075). \nThe MAXI/GSC detected the source in the scan transit at 2014-11-21T03:44:47 (UT),\nearlier than about 6 min before the BAT trigger.\nAssuming that the source flux was constant over the transit,\nwe obtain the source position at\n(R.A., Dec) = (122.928 deg, 22.053 deg) = (08 11 42, +22 03 10) (J2000) \nwith a statistical 90% C.L. elliptical error region \nwith long and short radii of 0.44 deg and 0.4 deg respectively. \nThe roll angle of long axis from the north direction is 174.0 deg counterclockwise. \nThere is an additional systematic uncertainty of 0.1 deg (90% containment radius).\nThis position is consistent with that reported as GRB 141121A.\n\nThe X-ray flux averaged over the scan was 57 +- 17 mCrab (4-10keV, 1 sigma error).\nThere was no significant excess flux in the previous transit at UT 00:39. \nand in the next transit at 05:17 UT with an upper limit of 20 mCrab for each.\nA simple power-law fit to the GSC spectrum gives a power-law index of 2.3 +/- 1.0.\n\nThese nature implies that the source is a long-GRB, or a new X-ray transient.\nThe followup observations are strongly encouraged to reveal the nature of the source.",
  "circularId": 17077,
  "createdOn": 1416551504000,
  "email": "negoro@phys.cst.nihon-u.ac.jp",
  "subject": "GRB 141121A: MAXI/GSC detection",
  "submitter": "H. Negoro at Nihon U.  <negoro@phys.cst.nihon-u.ac.jp>",
  "eventId": "GRB 141121A"
}