TITLE: GCN CIRCULAR NUMBER: 24970 SUBJECT: LIGO/Virgo S190701ah: No transient candidates from CALET observations DATE: 19/07/03 03:00:41 GMT FROM: Yuta Kawakubo at Louisiana State U./CALET S. Ricciarini (U of Florence) A. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita (AGU), Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), Y. Asaoka, S. Ozawa, S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC), M. L. Cherry (LSU), P. S. Marrocchesi (U of Siena), and the CALET collaboration: The CALET Gamma-ray Burst Monitor (CGBM) was operating at the trigger time of S190701ah T0 = 2019-07-01 20:33:06.578 UT (The LIGO Scientific Collaboration and Virgo Collaboration, GCN Circ. 24950). No CGBM on-board trigger occurred around the event time. Based on the LIGO-Virgo localization sky map, the high probability area was outside of the CGBM field of view. The summed LIGO probabilities inside the CGBM HXM (7-3000 keV) and SGM (40 keV - 28 MeV) fields of view are 0% (and 30% credible region of the initial localization map was above the horizon). The HXM and SGM fields of view were centered at RA = 278.6 deg, Dec = 4.1 deg and RA = 286.9 deg, Dec = -1.6 deg at T0, respectively. Based on the analysis of the light curve data with 0.125 sec time resolution from T0-60 sec to T0+60 sec, we found no significant excess (signal-to-noise ratio >= 7) around the trigger time in either the HXM or the SGM data. The CALET Calorimeter (CAL) was operating in the low energy trigger mode at the trigger time of S190701ah, but the CAL FOV does not have any overlap with the LVC high probability localization region.  The CAL FOV was centered at RA= 286.8 deg, DEC= -1.6 deg at T0.