GCN Circular 20445
Subject
LIGO/Virgo G268556: TZAC TAROT network observations with TRE/TCA/TCH
Date
2017-01-13T10:10:50Z (8 years ago)
From
Michel Boer at CESR-CNRS <michel.boer@unice.fr>
M. Boer, R. Laugier, K. Noysena (ARTEMIS - CNRS/UCA/OCA), A. Klotz (IRAP
- CNRS/UPS) report on behalf of the TZAC collaboration.
The TAROT network of telescopes has observed part of the error box of
the GW trigger G268556 (Shawman et al., GCN 20364). The observations
took place at TCA (TAROT OCA Calern observatory, France), TCH (TAROT
Chile, ESO La Silla Observatory), and TRE (TAROT Les Makes Observatory,
La R��union Island, France) during their respective nights of January 5-6
and 6-7, 2017. The field of view of TCA and TCH is 1.86�� (square), and
4.2�� for TRE. 4 fields have been observed by TCA, 5 for TCH and 9 for
TRE, resulting in a total of 175 sq. deg. explored in the error box. The
source ATLAS17aeu (Tony et al., GCN 20382) was not included in our
fields. The exposures lasted 120s with no filter, resulting in
approximate limiting magnitude of R < 17 for TCA and TCH (depending on
the conditions and Moon) and 16 for TRE. The list of the fields is given
below.
We have checked the TCA and TCH fields and found no new candidate
astrophysical transient sources. Analysis is still underway for TRE.
List of field centers (J2000):
TCA (1.86�� x 1.86��)
#0
08h51m11s
+47d58m55s
#1
08h43m27s
+46d02m16s
#2
08h56m47s
+49d53m15s
#3
09h05m31s
+52d01m07s
TCH (1.86�� x 1.86��)
#0
23h49m18s
-36d03m12s
#1
23h58m29s
-37d19m07s
#2
00h08m10s
-38d22m09s
#3
00h17m47s
-39d19m59s
#4
23h34m38s
-33d52m51s
TRE (4.2�� x 4.2��)
0
23h44m45s
-35d28m08s
1
00h02m19s
-37d20m19s
2
00h22m48s
-39d26m19s
3
00h44m36s
-42d01m15s
4
01h07m43s
-43d40m09s
5
23h31m33s
-32d11m14s
6
23h18m49s
-28d00m31s
7
23h03m54s
-24d30m28s
8
22h52m18s
-20d50m51s