{
  "circularId": 34211,
  "submitter": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
  "body": "K. Kobayashi (Waseda U), A. Yoshida, T. Sakamoto, \nS. Sugita (AGU), Y. Kawakubo (LSU), K. Yamaoka (Nagoya U),\nS. Nakahira (JAXA), Y. Asaoka (ICRR), S. Torii, \nY. Akaike (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U),\nN. Cannady (GSFC/UMBC), M. L. Cherry (LSU), \nS. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long GRB 230709B (Fermi-GBM Trigger 710614579; \nFermi-GBM BALROG localization: Biltzinger et al., GCN Circ 34179;\nGRBAlpha detection: Dafcikova et al., GCN Circ 34200) was detected\nin the ground analysis of the CALET Gamma-ray Burst Monitor (CGBM)\ndata around 16:56:14.47 UTC on 9 July 2023 (referenced to \nFermi-GBM Trigger 710614579). \nThe burst signal was seen by HXM1 and SGM.\n\nThe burst light curve shows a single pulse that starts\nat T+0.3 sec, peaks at T+3.5 sec, and ends at T+11.3 sec.\nThe T90 and T50 durations measured by the SGM data are \n9.9 +/- 0.6 sec and 5.4 +/- 1.1 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1372956935/index.html\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.",
  "bibcode": "2023GCN.34211....1K",
  "subject": "GRB 230709B: CALET Gamma-Ray Burst Monitor detection",
  "eventId": "GRB 230709B",
  "createdOn": 1689230798018
}