GCN Circular 25844
Subject
LIGO/Virgo S190924h: Not observable by CALET
Date
2019-09-25T04:15:11Z (6 years ago)
From
Yuta Kawakubo at Louisiana State U./CALET <kawakubo1@lsu.edu>
T. Sakamoto, A. Yoshida, V. Pal'shin, S. Sugita (AGU),
Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN),
Y. Asaoka, S. Torii (Waseda U), Y. Shimizu,
T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC),
M. L. Cherry (LSU), S. Ricciarini (U of Florence),
P. S. Marrocchesi (U of Siena),
and the CALET collaboration:
At the trigger time of the compact binary merger candidate S190924h,
T0 = 2019-09-24 02:18:46.847 UT (The LIGO Scientific Collaboration
and Virgo Collaboration, GCN Circ. 25829), the CALET Gamma-ray
Burst Monitor (CGBM) high voltages were off (from T0-1 min to
T0+16 min).
The CALET Calorimeter (CAL) was operating in the high energy
trigger mode at the trigger time of S190924h. Using the CAL data,
we have searched for gamma-ray events in the 10-100 GeV band from
-60 sec to +60 sec from the GW trigger time and found no candidates.
There is no significant overlap with the high probability
localization region. The CAL FOV was centered at RA=273.4 deg,
Dec=40.2 deg at T0.