Virgo G194575
GCN Circular 18443
Subject
LIGO Virgo G194575: TZAC TAROT observations
Date
2015-10-22T21:06:07Z (10 years ago)
From
Michel Boer at CESR-CNRS <michel.boer@unice.fr>
A. Klotz, M. Boer, D. Coward, N. Seghouani, J.P. Rivet, on behalf of the
TZAC collaboration (TAROT-Zadko-Aures-C2PU) collaboration report:
Following GCN #18442 on the possible GW event G194575, the TAROT
instruments located at the Calern Observatory (OCA - France) and La
Silla Observatory (ESO - Chile) have started observations of the error
box given in the above mentioned GCN.
The main probability island is located too close to the Sun, but the
other one is perfectly observable.
We are observing currently with TAROT Calern, then, as soon as possible
in Chile, the 5 following regions of 1.9�� x 1.9�� centred on:
RA= 9.5 Dec=2.6 J2000
RA=18.5 Dec=5.5 J2000
RA=19.5 Dec=3.6 J2000
RA=20.5 Dec=5.3 J2000
RA=21.0 Dec=1.8 J2000
We will report later on the observations and results.
GCN Circular 18454
Subject
LIGO Virgo G194575: MWA Observations
Date
2015-10-23T18:28:54Z (10 years ago)
From
David Kaplan at UW-Milwaukee <kaplan@uwm.edu>
D. Kaplan (UWM), S. Croft (UC Berkeley/Eureka Scientific), K. Bannister (CSIRO), T. Murphy (Sydney University), A. Rowlinson (UvA/Astron), M. Bell (CSIRO), S. Tingay (Curtin University), R. Wayth (Curtin University), T. Franzen (Curtin University), A. Williams (Curtin University) on behalf of the Murchison Widefield Array collaboration report:
We observed a single pointing designed to cover the majority of the sunward-lobe of the skymap of the advanced LIGO/Virgo trigger G194575 with the Murchison Widefield Array radio telescope. The observation covers roughly 30deg x 30deg (FWHM) centered at:
13:20:00 -12:42:00 2015-10-23T03:49:19 UT
(see attached image, where the sky probability is plotted logarithmically). The observations are at a center frequency of 154 MHz, with a 30 MHz bandwidth with 0.5s integrations and 40 kHz frequency resolution. This field will be reobserved in roughly 2 weeks. Analysis is ongoing. [cid:C6D6DF20-687D-498E-BEB4-14C80AF0818A@arizona.edu]