TITLE: GCN CIRCULAR NUMBER: 21690 SUBJECT: LIGO/Virgo G298936 TAROT/TZAC observations DATE: 17/08/25 13:11:34 GMT FROM: Michel Boer at CESR-CNRS M. Boer, R. Laugier (CNRS/ARTEMIS/UCA/OCA), A. Klotz (CNRS/IRAP/UPS), K. Noysena (ARTEMIS/IRAP/CNRS/UPS), report on behalf the TZAC collaboration: We have observed the enhanced localization of the LIGO/Virgo event G298936 during the nights of 2017-08-23 and 2017-08-24 from 20h28UT (observations are continuing). 8 fields covering about 40 sq. deg. have been scheduled on TRE and TCA (see list below). More than 300 images have been taken at this time and are under examination. List of the field centres: Instr RA (HMS) dec (DMS) First scheduled at: TCA 04:22:47 +49:57:53 2017-08-23T20:28:11.560 TCA 04:34:21 +49:57:53 2017-08-23T20:56:41.560 TCA 04:27:11 +48:06:17 2017-08-23T21:01:01.560 TCA 04:16:02 +48:06:17 2017-08-23T20:41:11.560 TCA 04:30:06 +51:49:29 2017-08-23T20:21:21.560 TRE 03:44:40 +38:06:00 2017-08-23T22:56:57.528 TRE 03:30:19 +33:54:00 2017-08-23T22:07:27.528 TRE 03:19:44 +29:42:00 2017-08-23T21:17:57.528 TRE 03:23:19 +38:06:00 2017-08-23T22:20:27.528 TRE 16:20:08 -24:53:59 2017-08-23T17:46:57.528 TRE 16:00:26 -20:41:59 2017-08-23T17:53:27.528 TRE 03:50:34 +33:54:00 2017-08-23T22:39:57.528 TRE 04:06:01 +38:06:00 2017-08-23T22:46:27.528 Note: TCA TAROT-Calern, field 1.9 sq. deg, TRE TAROT-RĂ©union, field 4sq.deg.