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GCN Circular 31616

Subject
IceCube Alert 220220.60: Global MASTER-Net observations report
Date
2022-02-20T21:29:17Z (2 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, 
D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina,
A.Chasovnikov, V.Topolev, V.Grinshpun, 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
(Irkutsk State University, API),

B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez,
M.L.H.Rodriguez (INAOE, OAGH)

A. Tlatov, D. Dormidontov 
(Kislovodsk Solar Station of the Pulkovo Observatory),

A. Gabovich, V.Yurkov 
(Blagoveschensk Educational State University)


MASTER-Amur robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the IceCube Alert 220220.60 (trigger No 220220,14h 45m 23.98s , +13d 13m 48.0s, R=0.17) errorbox  25 sec after notice time and 618 sec after trigger time at 2022-02-20 14:29:55 UT, with upper limit up to  16.6 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -48.0 deg. 

The galactic latitude b = 59 deg., longitude l = 11 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1889478

We obtain a following upper limits.  

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

     678 | 2022-02-20 14:29:55 |         MASTER-Amur | (14h 42m 51.44s , +13d 34m 16.1s) |  P\ |   120 | 13.3 |        
     833 | 2022-02-20 14:32:14 |         MASTER-Amur | (14h 42m 51.57s , +13d 32m 31.1s) |  P\ |   150 | 13.0 |        
    1018 | 2022-02-20 14:35:04 |         MASTER-Amur | (14h 42m 54.86s , +13d 33m 58.4s) |  P\ |   180 | 13.4 |        
    1217 | 2022-02-20 14:38:24 |         MASTER-Amur | (14h 42m 48.84s , +13d 33m 15.2s) |  P\ |   180 | 13.0 |        
    1416 | 2022-02-20 14:41:43 |         MASTER-Amur | (14h 42m 49.03s , +13d 34m 12.8s) |  P\ |   180 | 13.5 |        
    1616 | 2022-02-20 14:45:03 |         MASTER-Amur | (14h 42m 55.32s , +13d 33m 09.4s) |  P\ |   180 | 13.4 |        
    5624 | 2022-02-20 15:52:50 |         MASTER-Amur | (14h 42m 58.57s , +13d 29m 12.0s) |   R |    60 | 15.5 |        
    5704 | 2022-02-20 15:54:10 |         MASTER-Amur | (14h 42m 52.54s , +13d 28m 09.8s) |   R |    60 | 15.7 |        
    5783 | 2022-02-20 15:55:30 |         MASTER-Amur | (14h 42m 59.85s , +13d 28m 16.4s) |   R |    60 | 15.6 |        
    5863 | 2022-02-20 15:56:49 |         MASTER-Amur | (14h 42m 56.65s , +13d 29m 49.2s) |   R |    60 | 15.7 |        
    5942 | 2022-02-20 15:58:09 |         MASTER-Amur | (14h 42m 56.76s , +13d 28m 28.4s) |   R |    60 | 15.6 |        
    6022 | 2022-02-20 15:59:28 |         MASTER-Amur | (14h 43m 00.05s , +13d 30m 01.7s) |   R |    60 | 15.7 |        
    6102 | 2022-02-20 16:00:48 |         MASTER-Amur | (14h 42m 52.91s , +13d 29m 01.5s) |   R |    60 | 15.8 |        
    6181 | 2022-02-20 16:02:08 |         MASTER-Amur | (14h 42m 53.02s , +13d 30m 01.1s) |   R |    60 | 15.7 |        
    6261 | 2022-02-20 16:03:28 |         MASTER-Amur | (14h 43m 00.34s , +13d 29m 00.3s) |   R |    60 | 15.8 |        
    6341 | 2022-02-20 16:04:48 |         MASTER-Amur | (14h 42m 54.36s , +13d 27m 60.0s) |   R |    60 | 15.9 |        
    6421 | 2022-02-20 16:06:08 |         MASTER-Amur | (14h 42m 59.44s , +13d 28m 06.4s) |   R |    60 | 15.8 |        
    6501 | 2022-02-20 16:07:27 |         MASTER-Amur | (14h 42m 57.33s , +13d 29m 31.0s) |   R |    60 | 15.9 |        
   10155 | 2022-02-20 17:07:21 |         MASTER-Amur | (14h 43m 03.36s , +13d 28m 31.0s) |   R |   180 | 16.1 |        
   10354 | 2022-02-20 17:10:41 |         MASTER-Amur | (14h 42m 57.44s , +13d 27m 51.8s) |   R |   180 | 16.1 |        
   10554 | 2022-02-20 17:14:00 |         MASTER-Amur | (14h 42m 57.58s , +13d 28m 50.2s) |   R |   180 | 16.1 |        
   10753 | 2022-02-20 17:17:20 |         MASTER-Amur | (14h 43m 04.93s , +13d 27m 48.2s) |   R |   180 | 16.1 |        
   10953 | 2022-02-20 17:20:40 |         MASTER-Amur | (14h 42m 57.96s , +13d 26m 47.7s) |   R |   180 | 16.1 |        
   11153 | 2022-02-20 17:24:00 |         MASTER-Amur | (14h 43m 05.28s , +13d 27m 05.1s) |   R |   180 | 16.1 |        
   12996 | 2022-02-20 17:54:43 |         MASTER-Amur | (14h 43m 08.31s , +13d 28m 58.9s) |   R |   180 | 15.5 |        
   13423 | 2022-02-20 18:01:49 |         MASTER-Amur | (14h 43m 02.64s , +13d 28m 10.2s) |   R |   180 | 15.9 |        
   13622 | 2022-02-20 18:05:09 |         MASTER-Amur | (14h 43m 03.81s , +13d 29m 02.7s) |   R |   180 | 16.1 |        
   13822 | 2022-02-20 18:08:28 |         MASTER-Amur | (14h 43m 10.03s , +13d 28m 00.1s) |   R |   180 | 16.1 |        
   14022 | 2022-02-20 18:11:48 |         MASTER-Amur | (14h 43m 02.98s , +13d 26m 57.6s) |   R |   180 | 16.1 |        
   14221 | 2022-02-20 18:15:08 |         MASTER-Amur | (14h 43m 09.27s , +13d 27m 15.0s) |   R |   180 | 16.2 |        
   14652 | 2022-02-20 18:22:19 |         MASTER-Amur | (14h 43m 07.64s , +13d 27m 06.3s) |   R |   180 | 15.6 |        
   14852 | 2022-02-20 18:25:38 |         MASTER-Amur | (14h 43m 11.03s , +13d 28m 47.3s) |   R |   180 | 15.9 |        
   15051 | 2022-02-20 18:28:58 |         MASTER-Amur | (14h 43m 03.91s , +13d 27m 55.6s) |   R |   180 | 16.1 |        
   15251 | 2022-02-20 18:32:18 |         MASTER-Amur | (14h 43m 03.99s , +13d 28m 52.0s) |   R |   180 | 16.1 |        
   15451 | 2022-02-20 18:35:37 |         MASTER-Amur | (14h 43m 11.31s , +13d 27m 52.0s) |   R |   180 | 16.2 |        
   15650 | 2022-02-20 18:38:57 |         MASTER-Amur | (14h 43m 05.30s , +13d 26m 50.6s) |   R |   180 | 16.3 |        
   17556 | 2022-02-20 19:11:42 |         MASTER-Amur | (14h 43m 05.21s , +13d 29m 20.2s) |   C |    60 | 16.0 |        
   17636 | 2022-02-20 19:13:02 |         MASTER-Amur | (14h 43m 10.31s , +13d 28m 15.8s) |   C |    60 | 15.7 |        
   17716 | 2022-02-20 19:14:23 |         MASTER-Amur | (14h 43m 05.24s , +13d 27m 12.4s) |   C |    60 | 16.1 |        
   17776 | 2022-02-20 19:14:23 |         MASTER-Amur | (14h 43m 05.24s , +13d 27m 12.4s) |   C |   180 | 16.6 |  Coadd 
   17796 | 2022-02-20 19:15:43 |         MASTER-Amur | (14h 43m 11.35s , +13d 27m 24.3s) |   C |    60 | 16.3 |        
   17876 | 2022-02-20 19:17:02 |         MASTER-Amur | (14h 43m 08.51s , +13d 29m 08.6s) |   C |    60 | 16.2 |        
   17955 | 2022-02-20 19:18:22 |         MASTER-Amur | (14h 43m 08.56s , +13d 27m 39.1s) |   C |    60 | 16.2 |        
   18095 | 2022-02-20 19:19:42 |         MASTER-Amur | (14h 43m 11.46s , +13d 28m 52.5s) |   C |   180 | 16.6 |        
   18295 | 2022-02-20 19:23:02 |         MASTER-Amur | (14h 43m 04.72s , +13d 28m 07.3s) |   C |   180 | 16.6 |        
   18495 | 2022-02-20 19:26:21 |         MASTER-Amur | (14h 43m 04.75s , +13d 29m 06.9s) |   C |   180 | 16.4 |        
   18695 | 2022-02-20 19:29:41 |         MASTER-Amur | (14h 43m 11.67s , +13d 28m 07.7s) |   C |   180 | 16.3 |        
   18894 | 2022-02-20 19:33:01 |         MASTER-Amur | (14h 43m 04.89s , +13d 27m 09.0s) |   C |   180 | 16.3 |        
   19100 | 2022-02-20 19:36:26 |         MASTER-Amur | (14h 43m 11.80s , +13d 27m 39.3s) |   C |   180 | 16.2 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
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