GCN Circular 21159
Subject
LIGO/Virgo G268556: BSA radio observations at 110 MHz
Date
2017-05-28T19:00:29Z (8 years ago)
From
Alexei Pozanenko at IKI,Moscow <grbgw.iki@gmail.com>
A.S. Pozanenko (IKI), V.A. Samodurov (HSE, PRAO LPI), M.O. Toropov (JSC
Business Automation), A.E. Rodin (PRAO LPI), P.Yu. Minaev (IKI), S.V.
Logvinenko (PRAO LPI), V.V. Oreshko (PRAO LPI) report on behalf of
IKI-GW follow-up collaboration:
We have investigated daily data survey of BSA radiotelescope operated at
109.0-111.5 MHz in a survey mode (Samodurov, et al. 2015,
http://adsabs.harvard.edu/abs/2015OAP....28..242S). At the time of
trigger of G268556 (LIGO Scientific Collaboration, GCN 20364) the
diagram of BSA was 10:39 hours after and 13:21 hours before passing of
the localization area of G268556 between Dec=+15.0 deg and Dec=+42.0 deg
(i.e. most sensitive part of the BSA diagram). We do not detect any
source brighter than 3 Jy (exposure of 300 s) on (UT) 2017-01-04
23:33:00, i.e. 13:21 hours after the G268556 trigger in Declination
range between +15.0 and +42.0 degrees. We used previous passages of
the localization region through the diagram to estimate possible
variability of the flux and to estimate the upper limit. Result reported
is preliminary and might be refined.