{
  "bibcode": "2015GCN.18792....1S",
  "body": "K. Senuma, A. Yoshida, T. Sakamoto, I. Takahashi, Y. Kawakubo, \nM. Moriyama, Y. Yamada (AGU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), \nY. Asaoka, S. Ozawa, S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), \nM. L. Cherry (LSU), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena) \nand the CALET collaboration:\n\nThe long-duration GRB 151227B (Toelge et al. GCN Circ. 18727; Hurley et al. GCN Circ. 18773; \nGolenetskii et al. GCN Circ. 18781) triggered the CALET Gamma-Ray Burst Monitor (CGBM) at \n5:13:49.89 UT on 27 December 2015.  The clear burst signal was detected by HXM1 and SGM \ninstruments.  \n\nThe light curve of the SGM shows three main peaks.  The first peak starts at T0, \npeaks at T0+2 sec and ends at T0+4 sec.  The brightest second peak, which consists \nof various sub-peaks, starts at T0+20 sec, peaks at T0+31 sec and ends at T0+40 sec.  \nThe third peak starts at T0+40 sec, peaks at T0+45 sec and ends at T0+50 sec.  \nThe T90 duration measured by the SGM data is 42.0 +- 0.3 sec (40-1000 keV).  \n\nThe CGBM data used in this analysis are provided by the Waseda CALET Operation Center \nlocated at the Waseda University.",
  "circularId": 18792,
  "createdOn": 1451601430000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "GRB 151227B: CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>",
  "eventId": "GRB 151227B"
}