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

GCN Circular 21558

Subject
LIGO/Virgo G298048: TZAC TAROT Reunion (TRE) observations
Date
2017-08-18T13:04:25Z (7 years ago)
From
Michel Boer at CESR-CNRS <michel.boer@unice.fr>
A. Klotz (IRAP CNRS/UPS), R. Laugier, M. Boer, K. Noysena (ARTEMIS 
CNRS/UCA/OCA) report on behalf of the TZAC collaboration

We have observed the initial error box with the TRE (TAROT-Reunion) 
Telescope located at Les Makes Observatory, La R��union Island, France. 
Each image (no filter)  lasts for 120s and covers a field of 4.2 x 4.2 
deg2, with a magnitude limit of 17.0. Unfortunately the position of the 
candidate afterglow reported by Coulter et al. (LVC GCN 21529) was not 
in the position observable at that time given the automated generation 
of the fields, the mixed weather conditions, and the position of the GW 
candidate transient in the sky.

We list below the log of the observations. Images are under analysis.

Date                                    RA            DEC

2017-08-17T17:48:54    220.121 -43.833
2017-08-17T17:51:01    220.119 -43.832
2017-08-17T18:20:39    228.450 -48.036
2017-08-17T18:22:46    228.448 -48.035

2017-08-17T18:25:02    219.216 -52.230
2017-08-17T18:27:09    219.213 -52.228
2017-08-17T18:29:16    219.212 -52.226

2017-08-17T22:06:59     32.142 +40.179
2017-08-17T22:09:06     31.598 +40.180
2017-08-17T22:11:14     31.087 +40.183

2017-08-17T22:36:21     34.642 +42.385

2017-08-17T22:38:28     36.473 +40.141
2017-08-18T00:29:44     41.936 +40.144
2017-08-18T00:31:50     41.938 +40.143
2017-08-18T01:18:34     41.901 +40.145
2017-08-18T01:20:41     41.903 +40.145

2017-08-18T00:33:59     30.905 +40.147
2017-08-18T00:36:06     30.907 +40.147
2017-08-18T00:38:14     30.909 +40.147
2017-08-18T01:22:57     30.870 +40.151
2017-08-18T01:25:04     30.872 +40.151
2017-08-18T01:27:11     30.874 +40.151

2017-08-18T01:05:32     36.396 +40.145
2017-08-18T01:07:39     36.398 +40.145
2017-08-18T01:52:20     36.369 +40.149
2017-08-18T01:54:27     36.371 +40.150
2017-08-18T01:56:34     36.373 +40.151
Looking for U.S. government information and services? Visit USA.gov