TITLE: GCN CIRCULAR NUMBER: 23059 SUBJECT: GRB 180715A: CALET CAL gamma-ray analysis DATE: 18/07/30 09:50:27 GMT FROM: Takanori Sakamoto at AGU N. Cannady (LSU), K. Yoshikawa, Y. Asaoka (Waseda U), A. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita, Y. Kawakubo, A. Tezuka, S. Matsukawa, H. Onozawa, T. Ito, H. Morita, Y. Sone (AGU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), I. Takahashi (IPMU), S. Ozawa, 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: Using the CALET CALorimeter (CAL) data, we report GeV gamma-ray search analysis associated to GRB 180715A (Ukwatta, et al., GCN Circ. 22947, 22951; Hamburg and Meegan, GCN Circ. 22952; Torii et al., GCN Circ. 22956) The CAL was operating in low energy trigger mode at the trigger time of the CALET Gamma-ray Burst Monitor (CGBM). We have searched for gamma-ray events in the 1-10 GeV band from -60 sec to +60 sec from the CGBM trigger time using the Swift-BAT position (Ukwatta et al. GCN Circ. 22951) and found no candidates. The 90% upper limit of CAL is 3.2e-7 erg/cm2/s (1-10 GeV) assuming a power-law spectrum of a photon index of -2. All the quoted values are preliminary.