TITLE: GCN CIRCULAR NUMBER: 30240 SUBJECT: Fermi GRB 210615A: Global MASTER-Net observations report DATE: 21/06/16 01:16:46 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 210615A ( Fermi GBM team, GCN 30239) errorbox 28 sec after notice time and 46 sec after trigger time at 2021-06-15 23:34:39 UT, with upper limit up to 18.9 mag. Observations started at twilight. The observations began at zenith distance = 31 deg. The sun altitude is -15.9 deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 210615A errorbox 147 sec after notice time and 166 sec after trigger time at 2021-06-15 23:36:39 UT, with upper limit up to 18.0 mag. The observations began at zenith distance = 70 deg. The sun altitude is -34.6 deg. The galactic latitude b = 3 deg., longitude l = 110 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1637915 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 51 | 2021-06-15 23:34:39 | MASTER-Kislovodsk | (22h 50m 35.67s , +60d 35m 40.6s) | C | 10 | 17.2 | 66 | 2021-06-15 23:34:39 | MASTER-Kislovodsk | (22h 50m 35.67s , +60d 35m 40.5s) | C | 40 | 17.8 | Coadd 51 | 2021-06-15 23:34:39 | MASTER-Kislovodsk | (22h 59m 09.46s , +60d 10m 09.8s) | C | 10 | 17.5 | 66 | 2021-06-15 23:34:39 | MASTER-Kislovodsk | (22h 59m 09.46s , +60d 10m 09.9s) | C | 40 | 18.1 | Coadd 81 | 2021-06-15 23:35:09 | MASTER-Kislovodsk | (22h 50m 40.61s , +60d 34m 45.1s) | C | 10 | 17.1 | 81 | 2021-06-15 23:35:09 | MASTER-Kislovodsk | (22h 59m 14.32s , +60d 09m 18.0s) | C | 10 | 17.0 | 116 | 2021-06-15 23:35:39 | MASTER-Kislovodsk | (22h 50m 34.88s , +60d 33m 45.6s) | C | 20 | 17.4 | 116 | 2021-06-15 23:35:40 | MASTER-Kislovodsk | (22h 59m 08.38s , +60d 08m 16.1s) | C | 20 | 17.9 | 161 | 2021-06-15 23:36:19 | MASTER-Kislovodsk | (22h 50m 40.64s , +60d 34m 00.6s) | C | 30 | 17.6 | 206 | 2021-06-15 23:36:19 | MASTER-Kislovodsk | (22h 50m 40.64s , +60d 34m 00.6s) | C | 120 | 18.6 | Coadd 161 | 2021-06-15 23:36:19 | MASTER-Kislovodsk | (22h 59m 14.13s , +60d 08m 31.8s) | C | 30 | 18.2 | 206 | 2021-06-15 23:36:19 | MASTER-Kislovodsk | (22h 59m 14.13s , +60d 08m 31.8s) | C | 120 | 18.9 | Coadd 181 | 2021-06-15 23:36:39 | MASTER-IAC | (22h 49m 25.66s , +60d 20m 32.2s) | P| | 30 | 16.8 | 181 | 2021-06-15 23:36:39 | MASTER-IAC | (22h 51m 06.66s , +60d 13m 53.2s) | P- | 30 | 16.5 | 217 | 2021-06-15 23:37:10 | MASTER-Kislovodsk | (22h 50m 38.66s , +60d 35m 47.0s) | C | 40 | 17.9 | 217 | 2021-06-15 23:37:10 | MASTER-Kislovodsk | (22h 59m 12.53s , +60d 10m 19.4s) | C | 40 | 18.2 | 236 | 2021-06-15 23:37:29 | MASTER-IAC | (22h 49m 25.81s , +60d 18m 49.7s) | P| | 40 | 17.0 | 236 | 2021-06-15 23:37:29 | MASTER-IAC | (22h 51m 06.86s , +60d 12m 09.2s) | P- | 40 | 16.8 | 282 | 2021-06-15 23:38:10 | MASTER-Kislovodsk | (22h 50m 38.54s , +60d 34m 01.3s) | C | 50 | 18.1 | 282 | 2021-06-15 23:38:10 | MASTER-Kislovodsk | (22h 59m 11.95s , +60d 08m 34.3s) | C | 50 | 18.3 | 300 | 2021-06-15 23:38:29 | MASTER-IAC | (22h 49m 29.12s , +60d 20m 25.0s) | P| | 50 | 16.9 | 300 | 2021-06-15 23:38:29 | MASTER-IAC | (22h 51m 10.37s , +60d 13m 42.8s) | P- | 50 | 16.8 | 357 | 2021-06-15 23:39:20 | MASTER-Kislovodsk | (22h 50m 40.27s , +60d 35m 32.4s) | C | 60 | 18.2 | 357 | 2021-06-15 23:39:20 | MASTER-Kislovodsk | (22h 59m 14.04s , +60d 10m 06.0s) | C | 60 | 18.4 | 380 | 2021-06-15 23:39:38 | MASTER-IAC | (22h 49m 23.54s , +60d 19m 32.3s) | P| | 70 | 17.3 | 380 | 2021-06-15 23:39:38 | MASTER-IAC | (22h 51m 05.10s , +60d 12m 47.8s) | P- | 70 | 17.2 | 437 | 2021-06-15 23:40:40 | MASTER-Kislovodsk | (22h 51m 15.54s , +60d 15m 42.6s) | C | 60 | 17.9 | 437 | 2021-06-15 23:40:40 | MASTER-Kislovodsk | (22h 59m 44.45s , +59d 50m 18.2s) | C | 60 | 18.0 | 517 | 2021-06-15 23:42:01 | MASTER-Kislovodsk | (22h 38m 53.59s , +62d 10m 54.8s) | C | 60 | 17.9 | 517 | 2021-06-15 23:42:01 | MASTER-Kislovodsk | (22h 47m 53.18s , +61d 45m 29.7s) | C | 60 | 18.5 | 598 | 2021-06-15 23:43:21 | MASTER-Kislovodsk | (23h 03m 47.20s , +58d 21m 37.9s) | C | 60 | 17.8 | 598 | 2021-06-15 23:43:21 | MASTER-Kislovodsk | (23h 11m 50.20s , +57d 56m 15.0s) | C | 60 | 18.2 | 678 | 2021-06-15 23:44:41 | MASTER-Kislovodsk | (23h 20m 19.53s , +61d 42m 55.7s) | C | 60 | 18.3 | 678 | 2021-06-15 23:44:41 | MASTER-Kislovodsk | (23h 11m 20.78s , +62d 08m 28.2s) | C | 60 | 18.1 | 758 | 2021-06-15 23:46:01 | MASTER-Kislovodsk | (23h 01m 13.39s , +64d 02m 58.4s) | C | 60 | 17.9 | 758 | 2021-06-15 23:46:01 | MASTER-Kislovodsk | (23h 10m 46.23s , +63d 37m 23.1s) | C | 60 | 18.1 | 839 | 2021-06-15 23:47:22 | MASTER-Kislovodsk | (22h 26m 32.08s , +64d 04m 48.9s) | C | 60 | 17.9 | 839 | 2021-06-15 23:47:22 | MASTER-Kislovodsk | (22h 36m 07.25s , +63d 39m 26.4s) | C | 60 | 18.1 | 919 | 2021-06-15 23:48:42 | MASTER-Kislovodsk | (22h 51m 03.43s , +65d 57m 10.2s) | C | 60 | 17.9 | 919 | 2021-06-15 23:48:42 | MASTER-Kislovodsk | (23h 01m 17.00s , +65d 31m 32.9s) | C | 60 | 18.2 | 1028 | 2021-06-15 23:50:31 | MASTER-Kislovodsk | (22h 20m 47.37s , +60d 17m 20.6s) | C | 60 | 18.1 | 1028 | 2021-06-15 23:50:31 | MASTER-Kislovodsk | (22h 29m 18.37s , +59d 52m 00.5s) | C | 60 | 18.3 | 1119 | 2021-06-15 23:52:02 | MASTER-Kislovodsk | (23h 21m 45.32s , +60d 15m 30.5s) | C | 60 | 18.0 | 1119 | 2021-06-15 23:52:02 | MASTER-Kislovodsk | (23h 30m 14.48s , +59d 50m 05.2s) | C | 60 | 18.5 | 1199 | 2021-06-15 23:53:23 | MASTER-Kislovodsk | (22h 34m 47.46s , +58d 23m 14.8s) | C | 60 | 17.7 | 1279 | 2021-06-15 23:54:42 | MASTER-Kislovodsk | (22h 06m 33.49s , +62d 10m 30.4s) | C | 60 | 17.9 | 1279 | 2021-06-15 23:54:43 | MASTER-Kislovodsk | (22h 15m 35.28s , +61d 45m 19.5s) | C | 60 | 18.3 | 1440 | 2021-06-15 23:57:23 | MASTER-Kislovodsk | (22h 51m 19.19s , +60d 15m 11.2s) | C | 60 | 17.9 | 1440 | 2021-06-15 23:57:23 | MASTER-Kislovodsk | (22h 59m 49.05s , +59d 49m 52.4s) | C | 60 | 18.0 | 1520 | 2021-06-15 23:58:43 | MASTER-Kislovodsk | (22h 38m 54.90s , +62d 10m 53.6s) | C | 60 | 17.8 | 1520 | 2021-06-15 23:58:43 | MASTER-Kislovodsk | (22h 47m 55.95s , +61d 45m 34.0s) | C | 60 | 18.2 | 1600 | 2021-06-16 00:00:03 | MASTER-Kislovodsk | (23h 03m 42.79s , +58d 21m 19.8s) | C | 60 | 17.6 | 1600 | 2021-06-16 00:00:03 | MASTER-Kislovodsk | (23h 11m 46.02s , +57d 55m 59.4s) | C | 60 | 17.9 | 1680 | 2021-06-16 00:01:23 | MASTER-Kislovodsk | (23h 11m 24.32s , +62d 10m 39.5s) | C | 60 | 17.9 | 1680 | 2021-06-16 00:01:23 | MASTER-Kislovodsk | (23h 20m 24.24s , +61d 45m 13.2s) | C | 60 | 18.0 | 1686 | 2021-06-16 00:01:29 | MASTER-IAC | (23h 25m 53.98s , +63d 47m 39.5s) | C | 60 | 17.4 | 1686 | 2021-06-16 00:01:29 | MASTER-IAC | (23h 44m 16.20s , +63d 42m 17.7s) | C | 60 | 17.2 | 1760 | 2021-06-16 00:02:43 | MASTER-Kislovodsk | (23h 01m 03.74s , +64d 03m 55.3s) | C | 60 | 17.7 | 1760 | 2021-06-16 00:02:43 | MASTER-Kislovodsk | (23h 10m 38.58s , +63d 38m 27.3s) | C | 60 | 17.9 | 1766 | 2021-06-16 00:02:49 | MASTER-IAC | (23h 17m 38.62s , +65d 40m 44.9s) | C | 60 | 17.5 | 1766 | 2021-06-16 00:02:49 | MASTER-IAC | (23h 37m 20.66s , +65d 35m 23.4s) | C | 60 | 17.7 | 1840 | 2021-06-16 00:04:03 | MASTER-Kislovodsk | (22h 26m 26.69s , +64d 05m 20.6s) | C | 60 | 17.7 | 1840 | 2021-06-16 00:04:03 | MASTER-Kislovodsk | (22h 36m 03.54s , +63d 40m 04.5s) | C | 60 | 17.7 | 1846 | 2021-06-16 00:04:09 | MASTER-IAC | (22h 03m 38.28s , +65d 43m 05.1s) | C | 60 | 18.0 | 1846 | 2021-06-16 00:04:09 | MASTER-IAC | (22h 23m 26.09s , +65d 37m 36.2s) | C | 60 | 17.7 | 1927 | 2021-06-16 00:05:30 | MASTER-IAC | (22h 41m 03.04s , +56d 11m 43.1s) | C | 60 | 17.2 | 1927 | 2021-06-16 00:05:30 | MASTER-IAC | (22h 55m 39.01s , +56d 06m 14.3s) | C | 60 | 17.4 | 2000 | 2021-06-16 00:06:43 | MASTER-Kislovodsk | (22h 50m 56.82s , +65d 56m 58.7s) | C | 60 | 17.6 | 2000 | 2021-06-16 00:06:43 | MASTER-Kislovodsk | (23h 01m 12.19s , +65d 31m 24.1s) | C | 60 | 17.6 | 2007 | 2021-06-16 00:06:50 | MASTER-IAC | (22h 29m 53.58s , +67d 34m 22.2s) | C | 60 | 17.6 | 2007 | 2021-06-16 00:06:50 | MASTER-IAC | (22h 51m 13.60s , +67d 28m 54.5s) | C | 60 | 17.6 | 2080 | 2021-06-16 00:08:04 | MASTER-Kislovodsk | (22h 20m 45.82s , +60d 15m 56.8s) | C | 60 | 17.8 | 2081 | 2021-06-16 00:08:04 | MASTER-Kislovodsk | (22h 29m 18.49s , +59d 50m 43.6s) | C | 60 | 17.6 | 2087 | 2021-06-16 00:08:10 | MASTER-IAC | (23h 09m 58.10s , +67d 33m 42.3s) | C | 60 | 17.7 | 2087 | 2021-06-16 00:08:10 | MASTER-IAC | (23h 31m 14.69s , +67d 28m 18.7s) | C | 60 | 18.0 | 2161 | 2021-06-16 00:09:24 | MASTER-Kislovodsk | (23h 21m 46.90s , +60d 16m 37.4s) | C | 60 | 17.6 | 2161 | 2021-06-16 00:09:24 | MASTER-Kislovodsk | (23h 30m 17.75s , +59d 51m 16.0s) | C | 60 | 17.8 | 2167 | 2021-06-16 00:09:30 | MASTER-IAC | (23h 34m 24.53s , +61d 53m 12.6s) | C | 60 | 17.5 | 2167 | 2021-06-16 00:09:30 | MASTER-IAC | (23h 51m 38.51s , +61d 47m 42.3s) | C | 60 | 17.4 | 2241 | 2021-06-16 00:10:44 | MASTER-Kislovodsk | (22h 34m 46.87s , +58d 21m 38.5s) | C | 60 | 17.2 | 2241 | 2021-06-16 00:10:44 | MASTER-Kislovodsk | (22h 42m 53.14s , +57d 56m 37.1s) | C | 60 | 17.1 | 2246 | 2021-06-16 00:10:49 | MASTER-IAC | (21h 42m 23.80s , +63d 47m 52.4s) | C | 60 | 18.0 | 2246 | 2021-06-16 00:10:49 | MASTER-IAC | (22h 00m 51.18s , +63d 42m 16.0s) | C | 60 | 17.9 | 2321 | 2021-06-16 00:12:04 | MASTER-Kislovodsk | (22h 06m 28.45s , +62d 11m 14.7s) | C | 60 | 17.4 | 2321 | 2021-06-16 00:12:04 | MASTER-Kislovodsk | (22h 15m 32.79s , +61d 46m 13.9s) | C | 60 | 17.3 | 2326 | 2021-06-16 00:12:09 | MASTER-IAC | (23h 08m 22.90s , +56d 12m 03.1s) | C | 60 | 17.4 | 2326 | 2021-06-16 00:12:09 | MASTER-IAC | (23h 22m 59.37s , +56d 06m 30.5s) | C | 60 | 17.3 | 2401 | 2021-06-16 00:13:24 | MASTER-Kislovodsk | (22h 51m 10.23s , +60d 16m 18.8s) | C | 60 | 17.3 | 2401 | 2021-06-16 00:13:24 | MASTER-Kislovodsk | (22h 59m 42.44s , +59d 51m 02.7s) | C | 60 | 17.0 | 2407 | 2021-06-16 00:13:30 | MASTER-IAC | (21h 57m 43.00s , +58d 06m 28.1s) | C | 60 | 17.9 | 2407 | 2021-06-16 00:13:30 | MASTER-IAC | (22h 13m 08.61s , +58d 00m 51.6s) | C | 60 | 17.7 | 2481 | 2021-06-16 00:14:44 | MASTER-Kislovodsk | (22h 38m 49.79s , +62d 11m 23.6s) | C | 60 | 17.2 | 2481 | 2021-06-16 00:14:44 | MASTER-Kislovodsk | (22h 47m 53.15s , +61d 46m 10.7s) | C | 60 | 17.3 | 2486 | 2021-06-16 00:14:49 | MASTER-IAC | (22h 13m 32.96s , +56d 13m 15.8s) | C | 60 | 17.3 | 2486 | 2021-06-16 00:14:49 | MASTER-IAC | (22h 28m 12.57s , +56d 07m 38.7s) | C | 60 | 17.4 | 2561 | 2021-06-16 00:16:04 | MASTER-Kislovodsk | (23h 03m 43.14s , +58d 22m 13.7s) | C | 60 | 17.0 | 2561 | 2021-06-16 00:16:04 | MASTER-Kislovodsk | (23h 11m 48.75s , +57d 56m 59.0s) | C | 60 | 17.2 | 2566 | 2021-06-16 00:16:09 | MASTER-IAC | (23h 24m 12.74s , +58d 04m 59.8s) | C | 60 | 17.6 | 2566 | 2021-06-16 00:16:09 | MASTER-IAC | (23h 39m 34.89s , +57d 59m 27.0s) | C | 60 | 17.4 | 2641 | 2021-06-16 00:17:24 | MASTER-Kislovodsk | (23h 11m 13.90s , +62d 09m 03.1s) | C | 60 | 17.2 | 2641 | 2021-06-16 00:17:24 | MASTER-Kislovodsk | (23h 20m 15.56s , +61d 43m 42.7s) | C | 60 | 17.3 | 2648 | 2021-06-16 00:17:31 | MASTER-IAC | (23h 25m 46.93s , +63d 45m 43.0s) | C | 60 | 17.5 | 2648 | 2021-06-16 00:17:31 | MASTER-IAC | (23h 44m 09.31s , +63d 40m 15.2s) | C | 60 | 17.5 | 2721 | 2021-06-16 00:18:44 | MASTER-Kislovodsk | (23h 01m 07.15s , +64d 03m 10.3s) | C | 60 | 17.0 | 2721 | 2021-06-16 00:18:44 | MASTER-Kislovodsk | (23h 10m 43.56s , +63d 37m 45.6s) | C | 60 | 17.0 | 2728 | 2021-06-16 00:18:51 | MASTER-IAC | (23h 17m 45.41s , +65d 40m 01.9s) | C | 60 | 17.5 | 2728 | 2021-06-16 00:18:51 | MASTER-IAC | (23h 37m 28.12s , +65d 34m 35.7s) | C | 60 | 17.7 | 2808 | 2021-06-16 00:20:11 | MASTER-IAC | (22h 03m 40.63s , +65d 42m 34.3s) | C | 60 | 18.0 | 2808 | 2021-06-16 00:20:11 | MASTER-IAC | (22h 23m 29.11s , +65d 36m 59.3s) | C | 60 | 17.8 | 2819 | 2021-06-16 00:20:22 | MASTER-Kislovodsk | (22h 26m 26.42s , +64d 05m 04.3s) | C | 60 | 17.0 | 2819 | 2021-06-16 00:20:22 | MASTER-Kislovodsk | (22h 36m 04.56s , +63d 39m 53.0s) | C | 60 | 16.8 | 2887 | 2021-06-16 00:21:30 | MASTER-IAC | (22h 40m 57.54s , +56d 10m 48.7s) | C | 60 | 17.3 | 2887 | 2021-06-16 00:21:30 | MASTER-IAC | (22h 55m 35.11s , +56d 05m 13.4s) | C | 60 | 17.5 | 2900 | 2021-06-16 00:21:43 | MASTER-Kislovodsk | (21h 50m 07.59s , +60d 15m 55.4s) | C | 60 | 17.1 | 2900 | 2021-06-16 00:21:43 | MASTER-Kislovodsk | (21h 58m 41.98s , +59d 50m 52.9s) | C | 60 | 17.2 | 2980 | 2021-06-16 00:23:03 | MASTER-Kislovodsk | (22h 51m 00.75s , +65d 59m 05.0s) | C | 60 | 16.7 | 2980 | 2021-06-16 00:23:03 | MASTER-Kislovodsk | (23h 01m 17.86s , +65d 33m 41.3s) | C | 60 | 16.7 | 2989 | 2021-06-16 00:23:12 | MASTER-IAC | (22h 51m 20.34s , +67d 30m 25.3s) | C | 60 | 17.6 | 3060 | 2021-06-16 00:24:23 | MASTER-Kislovodsk | (22h 20m 37.44s , +60d 16m 44.7s) | C | 60 | 16.8 | 3060 | 2021-06-16 00:24:23 | MASTER-Kislovodsk | (22h 29m 10.84s , +59d 51m 34.7s) | C | 60 | 16.5 | 3078 | 2021-06-16 00:24:41 | MASTER-IAC | (23h 09m 49.93s , +67d 34m 46.8s) | C | 60 | 17.8 | 3078 | 2021-06-16 00:24:41 | MASTER-IAC | (23h 31m 08.56s , +67d 29m 20.5s) | C | 60 | 17.9 | 3140 | 2021-06-16 00:25:43 | MASTER-Kislovodsk | (23h 21m 42.60s , +60d 17m 07.1s) | C | 60 | 16.4 | 3140 | 2021-06-16 00:25:43 | MASTER-Kislovodsk | (23h 30m 13.95s , +59d 51m 48.2s) | C | 60 | 16.8 | 3220 | 2021-06-16 00:27:03 | MASTER-Kislovodsk | (22h 34m 49.99s , +58d 22m 41.5s) | C | 60 | 15.9 | 3220 | 2021-06-16 00:27:03 | MASTER-Kislovodsk | (22h 42m 56.88s , +57d 57m 43.2s) | C | 60 | 16.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.