TITLE: GCN CIRCULAR NUMBER: 30970 SUBJECT: Fermi GRB 211023A: Global MASTER-Net observations report DATE: 21/10/24 11:00:15 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-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 211023A ( Fermi GBM team, GCN 30958) errorbox 7595 sec after notice time and 7627 sec after trigger time at 2021-10-23 15:12:50 UT, with upper limit up to 18.9 mag. Observations started at twilight. The observations began at zenith distance = 53 deg. The sun altitude is -11.0 deg. The galactic latitude b = 24 deg., longitude l = 131 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1762531 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 7657 | 2021-10-23 15:12:50 | MASTER-Kislovodsk | (04h 49m 25.33s , +80d 59m 06.4s) | C | 60 | 17.6 | 7657 | 2021-10-23 15:12:50 | MASTER-Kislovodsk | (05h 14m 59.29s , +80d 31m 48.1s) | C | 60 | 18.0 | 7737 | 2021-10-23 15:14:10 | MASTER-Kislovodsk | (06h 05m 53.66s , +82d 52m 16.2s) | C | 60 | 17.6 | 7738 | 2021-10-23 15:14:10 | MASTER-Kislovodsk | (06h 38m 00.47s , +82d 24m 21.4s) | C | 60 | 18.1 | 7818 | 2021-10-23 15:15:30 | MASTER-Kislovodsk | (04h 03m 55.16s , +82d 55m 29.7s) | C | 60 | 17.6 | 7818 | 2021-10-23 15:15:30 | MASTER-Kislovodsk | (04h 35m 48.63s , +82d 26m 44.7s) | C | 60 | 18.3 | 7898 | 2021-10-23 15:16:50 | MASTER-Kislovodsk | (06h 14m 35.51s , +84d 16m 43.5s) | C | 60 | 18.5 | 7978 | 2021-10-23 15:18:11 | MASTER-Kislovodsk | (06h 26m 03.45s , +80d 59m 05.9s) | C | 60 | 17.8 | 8739 | 2021-10-23 15:30:52 | MASTER-Kislovodsk | (04h 49m 49.99s , +81d 01m 17.2s) | C | 60 | 17.9 | 8739 | 2021-10-23 15:30:52 | MASTER-Kislovodsk | (05h 15m 18.70s , +80d 34m 03.5s) | C | 60 | 18.9 | 8820 | 2021-10-23 15:32:12 | MASTER-Kislovodsk | (06h 06m 13.17s , +82d 53m 02.8s) | C | 60 | 17.9 | 8820 | 2021-10-23 15:32:12 | MASTER-Kislovodsk | (06h 38m 08.10s , +82d 25m 14.9s) | C | 60 | 18.8 | 8900 | 2021-10-23 15:33:32 | MASTER-Kislovodsk | (04h 04m 13.51s , +82d 56m 18.7s) | C | 60 | 18.1 | 8900 | 2021-10-23 15:33:32 | MASTER-Kislovodsk | (04h 35m 54.56s , +82d 27m 46.4s) | C | 60 | 18.9 | 8980 | 2021-10-23 15:34:52 | MASTER-Kislovodsk | (05h 32m 37.45s , +84d 47m 34.5s) | C | 60 | 18.1 | 8980 | 2021-10-23 15:34:52 | MASTER-Kislovodsk | (06h 14m 59.02s , +84d 17m 59.9s) | C | 60 | 18.9 | 9060 | 2021-10-23 15:36:13 | MASTER-Kislovodsk | (06h 26m 19.59s , +80d 57m 45.3s) | C | 60 | 18.2 | 9822 | 2021-10-23 15:48:54 | MASTER-Kislovodsk | (04h 49m 45.52s , +80d 59m 47.8s) | C | 60 | 17.9 | 9822 | 2021-10-23 15:48:54 | MASTER-Kislovodsk | (05h 15m 14.78s , +80d 32m 34.9s) | C | 60 | 18.8 | 10503 | 2021-10-23 16:00:16 | MASTER-Kislovodsk | (06h 08m 19.72s , +82d 54m 05.0s) | C | 60 | 18.0 | 10503 | 2021-10-23 16:00:16 | MASTER-Kislovodsk | (06h 38m 33.51s , +82d 25m 32.3s) | C | 60 | 18.8 | 10583 | 2021-10-23 16:01:36 | MASTER-Kislovodsk | (04h 06m 04.03s , +82d 55m 51.3s) | C | 60 | 18.0 | 10583 | 2021-10-23 16:01:36 | MASTER-Kislovodsk | (04h 35m 57.28s , +82d 27m 01.3s) | C | 60 | 18.9 | 10664 | 2021-10-23 16:02:56 | MASTER-Kislovodsk | (05h 35m 10.07s , +84d 49m 07.8s) | C | 60 | 18.1 | 10664 | 2021-10-23 16:02:56 | MASTER-Kislovodsk | (06h 15m 13.89s , +84d 18m 52.0s) | C | 60 | 18.9 | 10744 | 2021-10-23 16:04:16 | MASTER-Kislovodsk | (06h 27m 59.93s , +80d 59m 13.0s) | C | 60 | 18.1 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.