[vsnet-grb-info 28582] Fermi GRB 210822B: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30685
SUBJECT: Fermi GRB 210822B: Global MASTER-Net observations report 
DATE:    21/08/22 18:43:24 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at 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 GRB 210822B ( Fermi GBM team, GCN 30683) errorbox  387 sec after notice time and 579 sec after trigger time at 2021-08-22 17:40:03 UT, with upper limit up to  18.6 mag. Observations started at twilight.  The observations began at zenith distance = 37 deg. The sun  altitude  is -11.4 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 210822B errorbox  2167 sec after notice time and 2359 sec after trigger time at 2021-08-22 18:09:43 UT, with upper limit up to  18.1 mag. The observations began at zenith distance = 58 deg. The sun  altitude  is -24.7 deg. 

The galactic latitude b = 47 deg., longitude l = 31 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1697277

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

     639 | 2021-08-22 17:40:03 |      MASTER-Tavrida | (15h 53m 58.93s , +17d 53m 42.3s) |   C |   120 | 17.7 |        
     974 | 2021-08-22 17:46:08 |      MASTER-Tavrida | (15h 57m 41.09s , +18d 10m 19.7s) |   C |    60 | 18.4 |        
    1053 | 2021-08-22 17:47:27 |      MASTER-Tavrida | (16h 06m 01.45s , +18d 09m 19.4s) |   C |    60 | 18.6 |        
    1132 | 2021-08-22 17:48:46 |      MASTER-Tavrida | (15h 47m 45.39s , +16d 16m 38.2s) |   C |    60 | 18.0 |        
    1211 | 2021-08-22 17:50:05 |      MASTER-Tavrida | (15h 56m 05.66s , +16d 15m 23.9s) |   C |    60 | 18.2 |        
    1291 | 2021-08-22 17:51:25 |      MASTER-Tavrida | (15h 41m 33.74s , +18d 09m 58.1s) |   C |    60 | 18.0 |        
    1369 | 2021-08-22 17:52:43 |      MASTER-Tavrida | (15h 50m 00.13s , +18d 10m 59.7s) |   C |    60 | 18.0 |        
    1449 | 2021-08-22 17:54:03 |      MASTER-Tavrida | (15h 54m 50.24s , +14d 21m 55.7s) |   C |    60 | 18.3 |        
    1528 | 2021-08-22 17:55:22 |      MASTER-Tavrida | (16h 03m 00.47s , +14d 20m 56.1s) |   C |    60 | 18.3 |        
    1750 | 2021-08-22 17:59:04 |      MASTER-Tavrida | (16h 01m 05.04s , +20d 04m 55.6s) |   C |    60 | 18.6 |        
    2176 | 2021-08-22 18:06:10 |      MASTER-Tavrida | (16h 12m 01.08s , +16d 15m 34.5s) |   C |    60 | 18.0 |        
    2255 | 2021-08-22 18:07:29 |      MASTER-Tavrida | (15h 57m 35.96s , +18d 08m 27.0s) |   C |    60 | 18.4 |        
    2334 | 2021-08-22 18:08:48 |      MASTER-Tavrida | (16h 06m 07.95s , +18d 08m 42.7s) |   C |    60 | 18.5 |        
    2449 | 2021-08-22 18:09:43 |         MASTER-SAAO | (15h 52m 16.53s , +20d 02m 07.5s) |   C |   180 | 17.4 |        
    2413 | 2021-08-22 18:10:07 |      MASTER-Tavrida | (15h 47m 46.58s , +16d 15m 56.7s) |   C |    60 | 18.0 |        
    2492 | 2021-08-22 18:11:26 |      MASTER-Tavrida | (15h 56m 06.69s , +16d 14m 39.4s) |   C |    60 | 18.1 |        
    2571 | 2021-08-22 18:12:45 |      MASTER-Tavrida | (15h 41m 40.77s , +18d 09m 44.1s) |   C |    60 | 18.1 |        
    2649 | 2021-08-22 18:13:03 |         MASTER-SAAO | (15h 52m 16.43s , +20d 00m 45.0s) |   C |   180 | 17.8 |        
    2651 | 2021-08-22 18:14:05 |      MASTER-Tavrida | (15h 50m 00.99s , +18d 09m 09.1s) |   C |    60 | 18.0 |        
    2730 | 2021-08-22 18:15:24 |      MASTER-Tavrida | (15h 54m 45.11s , +14d 22m 04.9s) |   C |    60 | 18.1 |        
    2849 | 2021-08-22 18:16:23 |         MASTER-SAAO | (15h 40m 17.75s , +20d 03m 08.0s) |   C |   180 | 18.1 |        
    2809 | 2021-08-22 18:16:43 |      MASTER-Tavrida | (16h 03m 08.52s , +14d 21m 06.2s) |   C |    60 | 18.1 |        
    2888 | 2021-08-22 18:18:02 |      MASTER-Tavrida | (15h 52m 34.77s , +20d 02m 03.5s) |   C |    60 | 18.2 |        
    2967 | 2021-08-22 18:19:21 |      MASTER-Tavrida | (16h 01m 11.14s , +20d 02m 15.1s) |   C |    60 | 18.6 |        
    3049 | 2021-08-22 18:19:42 |         MASTER-SAAO | (15h 40m 12.49s , +20d 02m 36.6s) |   C |   180 | 18.1 |        
    3046 | 2021-08-22 18:20:40 |      MASTER-Tavrida | (16h 03m 37.00s , +16d 15m 54.0s) |   C |    60 | 18.1 |        
    3125 | 2021-08-22 18:21:59 |      MASTER-Tavrida | (16h 11m 57.21s , +16d 14m 15.4s) |   C |    60 | 18.2 |        
    3248 | 2021-08-22 18:23:02 |         MASTER-SAAO | (15h 28m 09.73s , +20d 04m 25.9s) |   C |   180 | 17.8 |        
    3204 | 2021-08-22 18:23:18 |      MASTER-Tavrida | (15h 57m 42.24s , +18d 09m 24.6s) |   C |    60 | 18.4 |        
    3283 | 2021-08-22 18:24:37 |      MASTER-Tavrida | (16h 06m 02.03s , +18d 08m 55.0s) |   C |    60 | 18.5 |        
    3362 | 2021-08-22 18:25:56 |      MASTER-Tavrida | (15h 47m 43.66s , +16d 15m 41.0s) |   C |    60 | 17.8 |        
    3448 | 2021-08-22 18:26:22 |         MASTER-SAAO | (15h 28m 17.04s , +20d 03m 32.8s) |   C |   180 | 18.0 |        
    3441 | 2021-08-22 18:27:15 |      MASTER-Tavrida | (15h 56m 09.47s , +16d 14m 42.6s) |   C |    60 | 18.0 |        
    3521 | 2021-08-22 18:28:35 |      MASTER-Tavrida | (15h 41m 34.75s , +18d 07m 32.0s) |   C |    60 | 17.7 |        
    3600 | 2021-08-22 18:29:54 |      MASTER-Tavrida | (15h 50m 07.35s , +18d 08m 01.6s) |   C |    60 | 17.8 |        
    3908 | 2021-08-22 18:34:02 |         MASTER-SAAO | (15h 44m 13.37s , +20d 01m 51.6s) |   C |   180 | 17.6 |        
    3873 | 2021-08-22 18:34:27 |      MASTER-Tavrida | (15h 52m 33.23s , +20d 03m 35.4s) |   C |    60 | 17.4 |        
    3952 | 2021-08-22 18:35:46 |      MASTER-Tavrida | (16h 01m 09.80s , +20d 02m 36.5s) |   C |    60 | 18.0 |        
    4030 | 2021-08-22 18:37:04 |      MASTER-Tavrida | (16h 03m 31.58s , +16d 13m 32.9s) |   C |    60 | 17.9 |        
    4110 | 2021-08-22 18:38:24 |      MASTER-Tavrida | (16h 11m 58.83s , +16d 13m 38.5s) |   C |    60 | 17.8 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.