GCN Circular 18673
Subject
GRB 130831A: MASTER early OT detection and LC
Date
2015-12-07T14:17:09Z (8 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
E.Gorbovskoy, V. Lipunov, N.Tyurina, V.Kornilov,
P.Balanutsa, A.Kuznetsov, D.Kuvshinov
Lomonosov Moscow State University, Sternberg Astronomical Institute
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
After this observation night there was no electricity at the
Tunka observatory for a few days . Therefore, the data were not immediately available. We
forgot to check the follow-up after power is restored and rediscovered
this source as optical transient during the data reprocessing of the
present time.
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Tunka was pointed to the GRB130831A 58 sec after trigger
time at 2013-08-31 13:05:14 UT. On our second (20s exposure 120 sec after
trigger) set we
found 1 optical transient within SWIFT error-box (ra=23 54 36 dec=+29 27
00 r=0.05) brighter then 15.1.
T-Tmid Date Time Expt. Ra Dec Mag
-------|-----------|----------|-------|-----------------|-----------------|-------
130 2013-08-31 13:06:16 20 23h 54m 29.82s +29d 25m 47.1s 14.34
The 5-sigma upper limit has been about 15.1mag
The automatic reduction data are below:
date time coord2000 Exp. Polaroid mag err
UT s
2013-08-31 13:05:13 - - 10 P/ >15.4
2013-08-31 13:05:14 - - 10 P\ >15.5
2013-08-31 13:06:14.969 23h 54m 29.77s +29d 25m 46s.5 20 P/ 14.19 0.13
2013-08-31 13:06:16.09 23h 54m 29.82s +29d 25m 47s.1 20 P\ 14.34 0.15
2013-08-31 13:07:37.707 23h 54m 29.94s +29d 25m 46s.6 40 P 13.70 0.07
2013-08-31 13:07:38.411 23h 54m 29.89s , +29d 25m 46s.3 40 P 14.08 0.08
2013-08-31 13:09:21.157 23h 54m 29.87s , +29d 25m 46s.5 60 P 13.96 0.06
2013-08-31 13:09:22.329 23h 54m 29.86s , +29d 25m 46s.3 60 P 14.17 0.06
2013-08-31 13:11:11.731 23h 54m 29.87s , +29d 25m 46s.8 80 P 13.96 0.05
2013-08-31 13:11:12.656 23h 54m 29.87s , +29d 25m 46s.4 80 P 14.05 0.04
2013-08-31 13:13:26.831 23h 54m 29.87s , +29d 25m 46s.4 110 P 13.14 0.02
2013-08-31 13:13:26.904 23h 54m 29.87s , +29d 25m 46s.7 110 P 13.23 0.01
2013-08-31 13:16:22.741 23h 54m 29.88s , +29d 25m 46s.4 140 P 12.76 0.01
2013-08-31 13:16:23.769 23h 54m 29.89s , +29d 25m 46s.7 140 P 12.79 0.01
2013-08-31 13:19:48.725 23h 54m 29.88s , +29d 25m 46s.5 180 P 13.10 0.01
2013-08-31 13:19:49.319 23h 54m 29.89s , +29d 25m 46s.6 180 P 13.03 0.01
2013-08-31 13:23:42.166 23h 54m 29.89s , +29d 25m 46s.6 180 P 13.44 0.01
2013-08-31 13:23:43.007 23h 54m 29.89s , +29d 25m 46s.6 180 P 13.40 0.01
2013-08-31 13:27:40.436 23h 54m 29.90s , +29d 25m 46s.5 180 P 13.80 0.01
2013-08-31 13:27:41.309 23h 54m 29.89s , +29d 25m 46s.7 180 P 13.79 0.01
2013-08-31 13:31:39.264 23h 54m 29.88s , +29d 25m 46s.7 180 P 14.08 0.02
2013-08-31 13:31:39.957 23h 54m 29.88s , +29d 25m 46s.8 180 P 14.12 0.01
2013-08-31 13:36:03.651 23h 54m 29.89s , +29d 25m 46s.4 180 P 14.44 0.02
2013-08-31 13:36:04.486 23h 54m 29.89s , +29d 25m 46s.5 180 P 14.51 0.02
2013-08-31 13:39:59.065 23h 54m 29.88s , +29d 25m 46s.6 180 P 14.55 0.02
2013-08-31 13:39:59.918 23h 54m 29.89s , +29d 25m 46s.7 180 P 14.53 0.02
2013-08-31 13:44:00.574 23h 54m 29.89s , +29d 25m 46s.7 180 P 14.72 0.02
2013-08-31 13:44:01.425 23h 54m 29.89s , +29d 25m 46s.6 180 P 14.78 0.03
2013-08-31 13:48:10.668 23h 54m 29.91s , +29d 25m 46s.5 180 P 14.94 0.03
2013-08-31 13:48:11.488 23h 54m 29.87s , +29d 25m 46s.5 180 P 14.95 0.02
2013-08-31 13:52:19.736 23h 54m 29.89s , +29d 25m 46s.3 180 P 14.97 0.03
2013-08-31 13:52:20.267 23h 54m 29.88s , +29d 25m 46s.3 180 P 14.99 0.03
2013-08-31 13:56:25.283 23h 54m 29.89s , +29d 25m 46s.7 180 P 15.11 0.03
2013-08-31 13:56:25.394 23h 54m 29.88s , +29d 25m 46s.6 180 P 15.05 0.03
2013-08-31 14:00:30.776 23h 54m 29.88s , +29d 25m 46s.7 180 P 15.16 0.03
2013-08-31 14:00:31.465 23h 54m 29.88s , +29d 25m 46s.6 180 P 15.13 0.03
2013-08-31 14:04:35.057 23h 54m 29.88s , +29d 25m 46s.5 180 P 15.18 0.03
2013-08-31 14:04:37.274 23h 54m 29.90s , +29d 25m 46s.8 180 P 15.10 0.03
2013-08-31 14:08:42.051 23h 54m 29.88s , +29d 25m 46s.6 180 P 15.18 0.03
2013-08-31 14:08:42.358 23h 54m 29.89s , +29d 25m 46s.8 180 P 15.18 0.03
2013-08-31 14:13:16.808 23h 54m 29.88s , +29d 25m 46s.5 180 P 15.16 0.03
2013-08-31 14:13:17.534 23h 54m 29.87s , +29d 25m 46s.6 180 P 15.19 0.03
2013-08-31 14:17:26.33 23h 54m 29.88s , +29d 25m 46s.6 180 P 15.22 0.03
2013-08-31 14:17:26.78 23h 54m 29.89s , +29d 25m 46s.7 180 P 15.16 0.03
2013-08-31 14:21:33.6 23h 54m 29.87s , +29d 25m 46s.4 180 P 15.33 0.03
2013-08-31 14:21:34.446 23h 54m 29.89s , +29d 25m 46s.6 180 P 15.27 0.03
2013-08-31 14:26:01.003 23h 54m 29.90s , +29d 25m 46s.7 180 P 15.37 0.03
2013-08-31 14:26:01.882 23h 54m 29.89s , +29d 25m 46s.5 180 P 15.30 0.03
2013-08-31 14:29:49.129 23h 54m 29.89s , +29d 25m 46s.7 180 P 15.45 0.03
2013-08-31 14:29:50.359 23h 54m 29.87s , +29d 25m 46s.7 180 P 15.39 0.03
2013-08-31 14:33:42.843 23h 54m 29.90s , +29d 25m 46s.4 180 P 15.47 0.03
2013-08-31 14:33:43.028 23h 54m 29.89s , +29d 25m 47s.0 180 P 15.46 0.04
2013-08-31 14:37:43.134 23h 54m 29.87s , +29d 25m 46s.4 180 P 15.52 0.04
2013-08-31 14:37:44.1 23h 54m 29.87s , +29d 25m 46s.6 180 P 15.42 0.04
2013-08-31 14:41:37.936 23h 54m 29.90s , +29d 25m 46s.5 180 P 15.66 0.04
2013-08-31 14:41:40.554 23h 54m 29.90s , +29d 25m 46s.5 180 P 15.57 0.04
2013-08-31 14:45:27.386 23h 54m 29.89s , +29d 25m 46s.4 180 P 15.71 0.04
2013-08-31 14:45:28.83 23h 54m 29.92s , +29d 25m 46s.7 180 P 15.54 0.04
2013-08-31 14:49:23.464 23h 54m 29.88s , +29d 25m 46s.6 180 P 15.70 0.04
2013-08-31 14:49:24.934 23h 54m 29.89s , +29d 25m 46s.6 180 P 15.58 0.04
2013-08-31 14:53:18.194 23h 54m 29.88s , +29d 25m 46s.4 180 P 15.66 0.04
2013-08-31 14:53:18.686 23h 54m 29.90s , +29d 25m 46s.8 180 P 15.58 0.04
2013-08-31 14:57:36.995 23h 54m 29.87s , +29d 25m 46s.3 180 P 15.76 0.04
2013-08-31 14:57:37.418 23h 54m 29.90s , +29d 25m 46s.6 180 P 15.63 0.04
2013-08-31 15:01:42.896 23h 54m 29.91s , +29d 25m 46s.3 180 P 15.88 0.05
2013-08-31 15:01:43.521 23h 54m 29.92s , +29d 25m 46s.6 180 P 15.69 0.04
2013-08-31 15:05:42.207 23h 54m 29.88s , +29d 25m 46s.6 180 P 15.95 0.04
2013-08-31 15:05:43.764 23h 54m 29.89s , +29d 25m 46s.7 180 P 15.75 0.04
2013-08-31 15:09:53.777 23h 54m 29.89s , +29d 25m 46s.4 180 P 15.93 0.05
2013-08-31 15:09:54.9 23h 54m 29.90s , +29d 25m 46s.5 180 P 15.84 0.05
2013-08-31 15:14:14.225 23h 54m 29.90s , +29d 25m 46s.5 180 P 16.04 0.05
2013-08-31 15:14:14.636 23h 54m 29.88s , +29d 25m 46s.5 180 P 15.90 0.05
2013-08-31 15:18:32.515 23h 54m 29.88s , +29d 25m 46s.4 180 P 15.98 0.05
2013-08-31 15:18:32.972 23h 54m 29.62s , +29d 25m 46s.7 180 P 16.80 0.08
2013-08-31 15:22:42.728 23h 54m 29.86s , +29d 25m 46s.4 180 P 16.13 0.05
2013-08-31 15:22:43.005 23h 54m 29.72s , +29d 25m 47s.5 180 P 16.50 0.08
2013-08-31 15:27:06.639 23h 54m 29.88s , +29d 25m 46s.1 180 P 16.23 0.06
2013-08-31 15:27:07.166 23h 54m 29.90s , +29d 25m 46s.6 180 P 15.99 0.06
2013-08-31 15:31:14.164 23h 54m 29.89s , +29d 25m 46s.5 180 P 16.32 0.06
2013-08-31 15:31:14.663 23h 54m 29.89s , +29d 25m 47s.1 180 P 16.06 0.06
2013-08-31 15:35:08.964 23h 54m 29.87s , +29d 25m 46s.4 180 P 16.39 0.07
2013-08-31 15:35:10.803 23h 54m 29.97s , +29d 25m 49s.0 180 P 16.83 0.10
2013-08-31 15:39:37.457 23h 54m 29.89s , +29d 25m 46s.7 180 P 16.47 0.07
2013-08-31 15:39:38.229 23h 54m 29.84s , +29d 25m 48s.1 180 P 16.73 0.10
2013-08-31 15:43:50.963 23h 54m 29.89s , +29d 25m 46s.6 180 P 16.51 0.07
2013-08-31 15:43:51.628 23h 54m 29.68s , +29d 25m 46s.2 180 P 17.30 0.14
2013-08-31 15:47:41.439 23h 54m 29.92s , +29d 25m 46s.8 180 P 16.41 0.08
2013-08-31 15:47:41.868 23h 54m 29.70s , +29d 25m 46s.3 180 P 16.70 0.10
2013-08-31 15:51:28.744 23h 54m 29.89s , +29d 25m 46s.7 180 P 16.57 0.08
2013-08-31 15:51:29.974 23h 54m 29.69s , +29d 25m 45s.8 180 P 16.99 0.12
2013-08-31 15:55:28.935 23h 54m 29.91s , +29d 25m 46s.6 180 P 16.68 0.11
2013-08-31 15:55:29.91 23h 54m 29.92s , +29d 25m 46s.6 180 P 16.36 0.10
2013-08-31 15:59:32.081 23h 54m 29.88s , +29d 25m 46s.5 180 P 16.78 0.09
2013-08-31 15:59:32.882 23h 54m 29.77s , +29d 25m 45s.2 180 P 16.75 0.10
2013-08-31 16:03:45.019 23h 54m 29.89s , +29d 25m 46s.2 180 P 16.71 0.09
2013-08-31 16:03:45.878 23h 54m 29.73s , +29d 25m 49s.2 180 P 16.98 0.13
2013-08-31 16:03:45.878 23h 54m 29.67s , +29d 25m 45s.0 180 P 17.21 0.14
2013-08-31 16:07:40.752 23h 54m 29.87s , +29d 25m 46s.7 180 P 16.68 0.10
2013-08-31 16:07:40.756 23h 54m 29.85s , +29d 25m 46s.9 180 P 16.53 0.11
2013-08-31 16:11:45.003 23h 54m 29.89s , +29d 25m 46s.5 180 P 16.65 0.09
2013-08-31 16:11:46.074 23h 54m 29.68s , +29d 25m 47s.0 180 P 16.51 0.11
2013-08-31 16:16:04.472 23h 54m 29.89s , +29d 25m 46s.2 180 P 16.90 0.11
2013-08-31 16:16:05.21 23h 54m 29.71s , +29d 25m 46s.2 180 P 17.15 0.14
2013-08-31 16:20:16.552 23h 54m 29.88s , +29d 25m 46s.4 180 P 16.71 0.09
2013-08-31 16:20:16.892 23h 54m 29.90s , +29d 25m 47s.3 180 P 16.63 0.12
2013-08-31 16:24:28.011 23h 54m 29.92s , +29d 25m 46s.2 180 P 16.74 0.12
2013-08-31 16:24:28.419 23h 54m 29.64s , +29d 25m 46s.9 180 P 17.97 0.22
2013-08-31 16:28:38.273 23h 54m 29.91s , +29d 25m 46s.3 180 P 16.75 0.11
2013-08-31 16:28:39.181 23h 54m 29.66s , +29d 25m 47s.7 180 P 17.10 0.16
2013-08-31 16:32:35.03 23h 54m 29.88s , +29d 25m 46s.4 180 P 17.03 0.12
2013-08-31 16:36:41.311 23h 54m 29.91s , +29d 25m 46s.9 180 P 16.88 0.13
2013-08-31 16:36:41.982 23h 54m 29.90s , +29d 25m 45s.2 180 P 16.91 0.14
2013-08-31 16:40:40.333 23h 54m 29.85s , +29d 25m 46s.5 180 P 17.07 0.15
2013-08-31 16:40:40.788 23h 54m 29.80s , +29d 25m 46s.5 180 P 18.57 0.32
The automatic light curve is available at
http://observ.pereplet.ru/images/GRB130831A.jpg
The message may be cited.
