//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 21334 SUBJECT: GRB 170702A CALET Gamma-Ray Burst Monitor detection DATE: 17/07/14 00:36:22 GMT FROM: Takanori Sakamoto at AGU S. Ozawa (Waseda U), A. Yoshida, T. Sakamoto, Y. Kawakubo, M. Moriyama, Y. Yamada, A. Tezuka, S. Matsukawa (AGU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), I. Takahashi (IPMU), Y. Asaoka, S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), W. Ishizaki (ICRR), M. L. Cherry (LSU), S. Ricciarini (U of Florence), A. V. Penacchioni, P. S. Marrocchesi (U of Siena) and the CALET collaboration: The long-duration GRB 170702A (INTEGRAL SPI-ACS detection time on 23:41:33 UT; Swift-BAT detection at the outside of the field of view) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 23:41:35.21 on 2 July 2017. The burst signal was seen by the all CGBM instruments. Because of a problem in one of the ground alert processing script, the GCN notice was not distributed automatically for this event. The light curve of the SGM shows four peaks. The emission starts at T-1 sec, peaks at T+0.5 sec (the first peak), T+2 sec (the second peak), T+4 sec (the third peak), T+8.3 sec (the fourth peak) and ends at T+10 sec. The T90 duration measured by the SGM data is 7.5 +- 0.4 sec (40-1000 keV). The light curve is available at http://cgbm.calet.jp/cgbm_trigger/flight/1183073582/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 21348 SUBJECT: GRB 170702A: AstroSat CZTI detection DATE: 17/07/15 20:38:55 GMT FROM: Vidushi Sharma at IUCAA V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IITB), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data showed clear detection of GRB 170702A (CALET Gamma-Ray Burst Monitor detection: Ozawa S. et al, GCN Circ. 21334) in the 40-200 keV energy range. The light curve shows multiple peaks of emission with the strongest peak at 23:41:36.0 UT, around ~2 s after the CALET trigger. The measured peak count rate is 1192.5 counts/s above the background in combined data of four quadrants, with a total 3911 counts. The local mean background count rate was 334.5 counts/s. Using cumulative rates, we measure a T90 of 8.7 s. It was clearly detected in the CsI anticoincidence detector (Veto) also as bright detection in the 100-500 keV energy range. CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.