[vsnet-grb-info 24137] LIGO/Virgo S191109d: Not observable by CALET

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  26236
SUBJECT: LIGO/Virgo S191109d: Not observable by CALET
DATE:    19/11/12 06:39:08 GMT
FROM:    Yuta Kawakubo at Louisiana State U./CALET  <kawakubo1 at lsu.edu>

Y. Asaoka (Waseda U), A. Yoshida, T. Sakamoto, 
V. Pal'shin, S. Sugita (AGU), Y. Kawakubo (LSU),
K. Yamaoka (Nagoya U), S. Nakahira (RIKEN),
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 
S191109d, T0 = 2019-11-09 01:07:17.221 UT (The LIGO 
Scientific Collaboration and Virgo Collaboration, GCN 
Circ. 26202), the CALET Gamma-ray Burst Monitor (CGBM)
high voltages were off (from T0-29 min to T0+3 min).

The CALET Calorimeter (CAL) was operating in the high energy 
trigger mode at the trigger time of S191109d. 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 LVC high 
probability localization region at T0+-60 sec.  The CAL FOV was
centered at RA=349.9 deg, Dec=-16.6 deg at T0.