Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 18446

LIGO/Virgo G194575: Mini-MegaTORTORA observations
2015-10-23T00:50:00Z (9 years ago)
Sergey Karpov at Special Astrophysical Obs <>
S.Karpov, G.Beskin (SAO RAS and Kazan Federal University,
Russia), S.Bondar, E.Ivanov, E.Katkova, A.Perkov (OJS RPC PSI,
Russia), A.Biryukov (SAI MSU and Kazan Federal University,
Russia), V.Sasyuk (Kazan Federal University, Russia)

Following GCN #18442 on the possible GW event G194575, we
observed its secondary probability density region with
Mini-MegaTORTORA nine-channel wide-field monitoring system
(located at Special Astrophysical Observatory near Russian 6-m
telescope) starting on 2015-10-22 22:33:24 UT under bad weather

The system field of view has been centered on RA, Dec = 16.8, 5.7
covering roughly 900 square degrees simultaneously. Coverage map
of all nine channels is shown at

Every channel acquired 10 x 60s exposure images in white light
between 2015-10-22 22:33:24 UT and 2015-10-22 22:42:31 UT,
further observations interrupted due to heavy clouds. The
footprints of acquired images are uploaded to GraceDB.

Quick-look analysis did not reveal any transient brighter than
V~13.5 magnitude in the data.
Looking for U.S. government information and services? Visit