TITLE: GCN CIRCULAR NUMBER: 30925 SUBJECT: Fermi trigger No 655401471: Global MASTER-Net observations report DATE: 21/10/08 16:16:39 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB211008.67 (trigger No 655401471,19h 34m 45.60s , +12d 52m 12.0s, R=1.09) errorbox 0 sec after notice time and 41 sec after trigger time at 2021-10-08 15:58:27 UT, with upper limit up to 12.9 mag. Observations started at twilight. The observations began at zenith distance = 29 deg. The sun altitude is -9.2 deg. MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB211008.67 errorbox 14 sec after notice time and 57 sec after trigger time at 2021-10-08 15:58:43 UT, with upper limit up to 17.5 mag. Observations started at twilight. The observations began at zenith distance = 28 deg. The sun altitude is -15.1 deg. The galactic latitude b = -4 deg., longitude l = 50 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1746527 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 46 | 2021-10-08 15:58:27 | MASTER-Tavrida | (19h 27m 45.22s , +15d 25m 46.0s) | C | 10 | 12.3 | 62 | 2021-10-08 15:58:43 | MASTER-Kislovodsk | (19h 31m 04.52s , +15d 12m 25.1s) | C | 10 | 16.6 | 75 | 2021-10-08 15:58:56 | MASTER-Tavrida | (19h 27m 50.08s , +15d 24m 45.0s) | C | 10 | 12.4 | 92 | 2021-10-08 15:59:13 | MASTER-Kislovodsk | (19h 31m 05.68s , +15d 13m 20.6s) | C | 10 | 16.6 | 127 | 2021-10-08 15:59:43 | MASTER-Kislovodsk | (19h 35m 02.78s , +12d 52m 31.1s) | P- | 20 | 15.0 | 127 | 2021-10-08 15:59:43 | MASTER-Kislovodsk | (19h 35m 01.04s , +13d 16m 23.0s) | P| | 20 | 16.4 | 162 | 2021-10-08 15:59:43 | MASTER-Kislovodsk | (19h 35m 01.05s , +13d 16m 23.0s) | P| | 90 | 17.0 | Coadd 172 | 2021-10-08 16:00:23 | MASTER-Kislovodsk | (19h 34m 57.14s , +12d 51m 26.6s) | P- | 30 | 15.0 | 172 | 2021-10-08 16:00:23 | MASTER-Kislovodsk | (19h 34m 55.33s , +13d 15m 21.4s) | P| | 30 | 16.6 | 227 | 2021-10-08 16:01:13 | MASTER-Kislovodsk | (19h 35m 02.97s , +12d 51m 51.1s) | P- | 40 | 15.2 | 282 | 2021-10-08 16:01:13 | MASTER-Kislovodsk | (19h 35m 02.97s , +12d 51m 51.0s) | P- | 150 | 16.0 | Coadd 227 | 2021-10-08 16:01:13 | MASTER-Kislovodsk | (19h 35m 01.08s , +13d 15m 46.6s) | P| | 40 | 16.8 | 292 | 2021-10-08 16:02:13 | MASTER-Kislovodsk | (19h 35m 00.19s , +12d 52m 53.8s) | P- | 50 | 15.4 | 292 | 2021-10-08 16:02:13 | MASTER-Kislovodsk | (19h 34m 58.23s , +13d 16m 49.1s) | P| | 50 | 17.0 | 362 | 2021-10-08 16:02:13 | MASTER-Kislovodsk | (19h 34m 58.23s , +13d 16m 49.0s) | P| | 190 | 17.5 | Coadd 368 | 2021-10-08 16:03:24 | MASTER-Kislovodsk | (19h 35m 00.28s , +12d 51m 40.6s) | P- | 60 | 15.6 | 368 | 2021-10-08 16:03:24 | MASTER-Kislovodsk | (19h 34m 58.26s , +13d 15m 35.0s) | P| | 60 | 17.1 | 458 | 2021-10-08 16:04:44 | MASTER-Kislovodsk | (19h 35m 03.24s , +12d 53m 11.9s) | P- | 80 | 15.9 | 458 | 2021-10-08 16:04:44 | MASTER-Kislovodsk | (19h 35m 01.12s , +13d 17m 05.6s) | P| | 80 | 17.4 | 568 | 2021-10-08 16:06:24 | MASTER-Kislovodsk | (19h 34m 56.54s , +12d 52m 14.1s) | P- | 100 | 16.2 | 568 | 2021-10-08 16:06:24 | MASTER-Kislovodsk | (19h 34m 54.34s , +13d 16m 07.1s) | P| | 100 | 17.5 | 674 | 2021-10-08 16:08:00 | MASTER-Tavrida | (19h 31m 58.51s , +13d 04m 24.1s) | P\ | 120 | 12.9 | 698 | 2021-10-08 16:08:24 | MASTER-Kislovodsk | (19h 34m 57.72s , +12d 53m 12.5s) | P- | 120 | 16.4 | 698 | 2021-10-08 16:08:24 | MASTER-Kislovodsk | (19h 34m 55.45s , +13d 17m 04.9s) | P| | 120 | 17.6 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.