{
  "bibcode": "2016GCN.19345....1R",
  "body": "S. Ricciarini (U of Florence), A. Yoshida, T. Sakamoto, Y. Kawakubo, M. Moriyama, \nY. Yamada (AGU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), I. Takahashi (IPMU), \nY. Asaoka, S. Ozawa, S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), \nW. Ishizaki (ICRR), M. L. Cherry (LSU), P. S. Marrocchesi (U of Siena) \nand the CALET collaboration:\n\nThe long-duration GRB 160422A (Burns et al., GCN circ. 19331; Yassine et al., \nGCN circ. 19329; INTEGRAL-ACS #7450) triggered the CALET Gamma-Ray Burst Monitor (CGBM) \nat 11:59:08.28 on 22 April 2016.  The burst signal was only seen by the SGM instrument.  \nThis fact is consistent that the GRB location of the Fermi-LAT (Yassine et al., \nGCN circ. 19329) was outside the field of view of the CALET CALorimeter (CAL) instrument, \nwhich has the capability to observe gamma-rays above 1 GeV, at the trigger time.  \nThe boresight angle of the SGM to the Fermi-LAT position was ~105 deg.  \n\nThe light curve of the SGM shows at least two episodes.  The first episode starts at \nT0-7 sec, peaks at T0-6 sec and ends at T0-4 sec.  The second episode shows the emission \nstarting at T0, peaking at T0+1 sec and ending at T0+4 sec.  The T90 duration measured by \nthe SGM data is 8.7 +- 0.3 sec (100-1000 keV). \n\nThe CGBM data used in this analysis are provided by the Waseda CALET Operation Center \nlocated at the Waseda University.",
  "circularId": 19345,
  "createdOn": 1461634057000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "GRB 160422A: CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>",
  "eventId": "GRB 160422A"
}