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GCN Circular 33853

Subject
LIGO/Virgo S230522a: Global MASTER-Net observations report
Date
2023-05-23T02:50:46Z (9 months 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, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov,  D.Cheryasov, Ya.Kechin
(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),

L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez 
(INAOE, Guillermo Haro Astrophysics Observatory),

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

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


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S230522a errorbox  16 sec after notice time and 58 sec after trigger time at 2023-05-22 09:39:03 UT, with upper limit up to  17.3 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -21.1 deg. 

MASTER-Amur robotic telescope  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the LIGO/Virgo S230522a errorbox  11003 sec after notice time and 11044 sec after trigger time at 2023-05-22 12:42:09 UT, with upper limit up to  18.3 mag. Observations started at twilight.  The observations began at zenith distance = 58 deg. The sun  altitude  is -10.8 deg. 

The galactic latitude b =  5 deg., longitude l = 65 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/ligo_1.php?id=11878

We obtain a following upper limits.  

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

      63 | 2023-05-22 09:39:03 |         MASTER-OAFA | (19h 34m 48.88s , +30d 35m 13.5s) |   C |    10 | 14.9 |        
      97 | 2023-05-22 09:39:32 |         MASTER-OAFA | (19h 34m 55.42s , +30d 34m 12.8s) |   C |    20 | 15.4 |        
     137 | 2023-05-22 09:40:12 |         MASTER-OAFA | (19h 34m 49.64s , +30d 33m 11.4s) |   C |    20 | 15.6 |        
     177 | 2023-05-22 09:40:12 |         MASTER-OAFA | (19h 34m 49.64s , +30d 33m 11.6s) |   C |   100 | 15.9 |  Coadd 
     182 | 2023-05-22 09:40:51 |         MASTER-OAFA | (19h 34m 56.49s , +30d 33m 17.5s) |   C |    30 | 15.7 |        
     236 | 2023-05-22 09:41:41 |         MASTER-OAFA | (19h 34m 52.51s , +30d 35m 03.1s) |   C |    40 | 15.7 |        
     301 | 2023-05-22 09:42:40 |         MASTER-OAFA | (19h 34m 52.47s , +30d 33m 32.0s) |   C |    50 | 15.7 |        
     380 | 2023-05-22 09:43:49 |         MASTER-OAFA | (19h 34m 55.75s , +30d 34m 56.6s) |   C |    70 | 14.9 |        
     480 | 2023-05-22 09:45:19 |         MASTER-OAFA | (19h 34m 50.29s , +30d 34m 01.5s) |   C |    90 | 14.9 |        
     599 | 2023-05-22 09:47:09 |         MASTER-OAFA | (19h 34m 49.49s , +30d 34m 57.5s) |   C |   110 | 15.5 |        
     739 | 2023-05-22 09:49:19 |         MASTER-OAFA | (19h 34m 55.24s , +30d 33m 52.2s) |   C |   130 | 15.9 |        
     914 | 2023-05-22 09:51:48 |         MASTER-OAFA | (18h 23m 08.96s , +24d 48m 15.6s) |   C |   180 | 17.0 |        
    1113 | 2023-05-22 09:55:08 |         MASTER-OAFA | (18h 23m 15.43s , +24d 48m 31.7s) |   C |   180 | 17.0 |        
    1313 | 2023-05-22 09:58:27 |         MASTER-OAFA | (18h 23m 12.21s , +24d 49m 34.8s) |   C |   180 | 16.9 |        
    1513 | 2023-05-22 10:01:47 |         MASTER-OAFA | (18h 23m 12.33s , +24d 48m 03.6s) |   C |   180 | 17.2 |        
    1712 | 2023-05-22 10:05:06 |         MASTER-OAFA | (18h 23m 14.90s , +24d 49m 35.1s) |   C |   180 | 17.3 |        
    1912 | 2023-05-22 10:08:26 |         MASTER-OAFA | (18h 23m 09.18s , +24d 48m 34.7s) |   C |   180 | 17.3 |        
    2111 | 2023-05-22 10:11:45 |         MASTER-OAFA | (18h 23m 10.28s , +24d 49m 27.3s) |   C |   180 | 16.9 |        
    2310 | 2023-05-22 10:15:05 |         MASTER-OAFA | (18h 23m 16.54s , +24d 48m 18.6s) |   C |   180 | 16.9 |        
    2510 | 2023-05-22 10:18:24 |         MASTER-OAFA | (18h 23m 09.79s , +24d 47m 10.3s) |   C |   180 | 16.7 |        
   11074 | 2023-05-22 12:42:09 |         MASTER-Amur | (13h 09m 08.87s , -07d 41m 16.2s) |   C |    60 | 16.3 |        
   11167 | 2023-05-22 12:43:42 |         MASTER-Amur | (13h 09m 15.69s , -07d 42m 26.4s) |   C |    60 | 16.4 |        
   11260 | 2023-05-22 12:45:14 |         MASTER-Amur | (13h 09m 09.88s , -07d 43m 33.6s) |   C |    60 | 16.6 |        
   11412 | 2023-05-22 12:46:46 |         MASTER-Amur | (18h 25m 35.96s , +25d 01m 34.0s) |   C |   180 | 16.4 |        
   11624 | 2023-05-22 12:50:19 |         MASTER-Amur | (18h 25m 34.01s , +25d 02m 58.8s) |   C |   180 | 16.8 |        
   11837 | 2023-05-22 12:53:51 |         MASTER-Amur | (18h 25m 33.94s , +25d 01m 03.8s) |   C |   180 | 17.1 |        
   12049 | 2023-05-22 12:57:24 |         MASTER-Amur | (18h 25m 36.44s , +25d 02m 12.0s) |   C |   180 | 17.2 |        
   12262 | 2023-05-22 13:00:56 |         MASTER-Amur | (18h 25m 31.18s , +25d 01m 33.9s) |   C |   180 | 17.4 |        
   12474 | 2023-05-22 13:04:29 |         MASTER-Amur | (18h 25m 30.07s , +25d 02m 25.9s) |   C |   180 | 17.5 |        
   12693 | 2023-05-22 13:08:07 |         MASTER-Amur | (18h 25m 35.67s , +25d 01m 18.8s) |   C |   180 | 17.6 |        
   12905 | 2023-05-22 13:11:40 |         MASTER-Amur | (18h 25m 29.62s , +25d 00m 10.4s) |   C |   180 | 17.6 |        
   13117 | 2023-05-22 13:15:12 |         MASTER-Amur | (18h 25m 35.03s , +25d 00m 08.1s) |   C |   180 | 17.6 |        
   13330 | 2023-05-22 13:18:44 |         MASTER-Amur | (18h 25m 31.65s , +25d 01m 49.3s) |   C |   180 | 17.6 |        
   13542 | 2023-05-22 13:22:17 |         MASTER-Amur | (18h 22m 51.71s , +31d 39m 51.4s) |   C |   180 | 18.0 |        
   13755 | 2023-05-22 13:25:49 |         MASTER-Amur | (18h 32m 09.42s , +31d 39m 08.5s) |   C |   180 | 18.0 |        
   13967 | 2023-05-22 13:29:22 |         MASTER-Amur | (18h 19m 03.49s , +29d 44m 31.9s) |   C |   180 | 18.1 |        
   14180 | 2023-05-22 13:32:54 |         MASTER-Amur | (18h 28m 09.75s , +29d 43m 48.1s) |   C |   180 | 18.1 |        
   14393 | 2023-05-22 13:36:28 |         MASTER-Amur | (18h 22m 50.32s , +31d 37m 47.1s) |   C |   180 | 18.1 |        
   14606 | 2023-05-22 13:40:00 |         MASTER-Amur | (18h 32m 10.82s , +31d 39m 34.8s) |   C |   180 | 18.0 |        
   14818 | 2023-05-22 13:43:33 |         MASTER-Amur | (18h 18m 58.78s , +29d 43m 07.8s) |   C |   180 | 18.1 |        
   15031 | 2023-05-22 13:47:06 |         MASTER-Amur | (18h 28m 15.27s , +29d 45m 02.1s) |   C |   180 | 18.1 |        
   15244 | 2023-05-22 13:50:38 |         MASTER-Amur | (18h 09m 37.48s , +33d 31m 56.8s) |   C |   180 | 18.2 |        
   15456 | 2023-05-22 13:54:11 |         MASTER-Amur | (18h 19m 20.25s , +33d 31m 16.7s) |   C |   180 | 18.3 |        
   15669 | 2023-05-22 13:57:43 |         MASTER-Amur | (18h 40m 40.87s , +31d 37m 21.9s) |   C |   180 | 18.0 |        
   15887 | 2023-05-22 14:01:21 |         MASTER-Amur | (18h 50m 01.44s , +31d 39m 08.5s) |   C |   180 | 18.0 |        
   16100 | 2023-05-22 14:04:54 |         MASTER-Amur | (18h 09m 39.47s , +33d 29m 32.4s) |   C |   180 | 18.3 |        
   16312 | 2023-05-22 14:08:26 |         MASTER-Amur | (18h 19m 17.66s , +33d 31m 21.9s) |   C |   180 | 18.2 |        
   16524 | 2023-05-22 14:11:59 |         MASTER-Amur | (18h 40m 31.51s , +31d 37m 30.9s) |   C |   180 | 17.8 |        
   16737 | 2023-05-22 14:15:31 |         MASTER-Amur | (18h 49m 56.01s , +31d 38m 47.6s) |   C |   180 | 17.8 |        
   16949 | 2023-05-22 14:19:04 |         MASTER-Amur | (18h 16m 25.56s , +27d 47m 03.6s) |   C |   180 | 18.0 |        
   17162 | 2023-05-22 14:22:36 |         MASTER-Amur | (18h 25m 34.86s , +27d 47m 51.1s) |   C |   180 | 18.0 |        
   17383 | 2023-05-22 14:26:17 |         MASTER-Amur | (18h 33m 40.05s , +27d 47m 56.1s) |   C |   180 | 17.9 |        
   17595 | 2023-05-22 14:29:50 |         MASTER-Amur | (18h 42m 46.37s , +27d 49m 28.7s) |   C |   180 | 17.9 |        
   17832 | 2023-05-22 14:33:47 |         MASTER-Amur | (18h 16m 23.33s , +27d 47m 18.8s) |   C |   180 | 18.0 |        
   18045 | 2023-05-22 14:37:20 |         MASTER-Amur | (18h 25m 27.48s , +27d 48m 37.1s) |   C |   180 | 18.1 |        
   18183 | 2023-05-22 14:40:53 |         MASTER-Amur | (18h 25m 27.64s , +24d 57m 04.9s) |   C |    30 | 17.3 |        
   18246 | 2023-05-22 14:41:55 |         MASTER-Amur | (18h 25m 23.01s , +24d 56m 01.1s) |   C |    30 | 17.3 |        
   18308 | 2023-05-22 14:42:58 |         MASTER-Amur | (18h 25m 27.60s , +24d 56m 06.9s) |   C |    30 | 17.3 |        
   18371 | 2023-05-22 14:44:01 |         MASTER-Amur | (18h 25m 25.64s , +24d 57m 39.0s) |   C |    30 | 17.3 |        
   18434 | 2023-05-22 14:45:03 |         MASTER-Amur | (18h 25m 25.75s , +24d 55m 54.3s) |   C |    30 | 17.3 |        
   18497 | 2023-05-22 14:46:06 |         MASTER-Amur | (18h 25m 27.37s , +24d 57m 45.3s) |   C |    30 | 17.3 |        
   18560 | 2023-05-22 14:47:09 |         MASTER-Amur | (18h 25m 22.72s , +24d 56m 42.4s) |   C |    30 | 17.3 |        
   18623 | 2023-05-22 14:48:12 |         MASTER-Amur | (18h 25m 22.61s , +24d 57m 37.5s) |   C |    30 | 17.3 |        
   18685 | 2023-05-22 14:49:15 |         MASTER-Amur | (18h 25m 28.45s , +24d 56m 34.0s) |   C |    30 | 17.2 |        
   18748 | 2023-05-22 14:50:17 |         MASTER-Amur | (18h 25m 22.74s , +24d 55m 29.7s) |   C |    30 | 17.3 |        
   18811 | 2023-05-22 14:51:20 |         MASTER-Amur | (18h 25m 29.50s , +24d 55m 37.9s) |   C |    30 | 17.3 |        
   18873 | 2023-05-22 14:52:23 |         MASTER-Amur | (18h 25m 25.40s , +24d 57m 07.9s) |   C |    30 | 17.3 |        
   19011 | 2023-05-22 14:53:25 |         MASTER-Amur | (18h 33m 38.51s , +27d 46m 07.8s) |   C |   180 | 18.0 |        
   19224 | 2023-05-22 14:56:58 |         MASTER-Amur | (18h 42m 44.76s , +27d 48m 19.8s) |   C |   180 | 18.1 |        
   19436 | 2023-05-22 15:00:31 |         MASTER-Amur | (18h 53m 51.50s , +29d 42m 44.4s) |   C |   180 | 18.0 |        
   19649 | 2023-05-22 15:04:03 |         MASTER-Amur | (19h 03m 10.65s , +29d 42m 05.9s) |   C |   180 | 17.9 |        
   19861 | 2023-05-22 15:07:36 |         MASTER-Amur | (18h 33m 00.18s , +22d 03m 52.7s) |   C |   180 | 17.7 |        
   20074 | 2023-05-22 15:11:08 |         MASTER-Amur | (18h 41m 34.88s , +22d 05m 40.7s) |   C |   180 | 17.8 |        
   20286 | 2023-05-22 15:14:40 |         MASTER-Amur | (18h 53m 54.46s , +29d 40m 12.3s) |   C |   180 | 18.0 |        
   20498 | 2023-05-22 15:18:13 |         MASTER-Amur | (19h 03m 09.35s , +29d 42m 06.9s) |   C |   180 | 17.9 |        
   20735 | 2023-05-22 15:22:09 |         MASTER-Amur | (18h 32m 53.36s , +22d 03m 43.5s) |   C |   180 | 17.5 |        
   20947 | 2023-05-22 15:25:42 |         MASTER-Amur | (18h 41m 31.56s , +22d 04m 59.5s) |   C |   180 | 17.4 |        
   21160 | 2023-05-22 15:29:15 |         MASTER-Amur | (18h 35m 05.87s , +20d 08m 27.5s) |   C |   180 | 17.6 |        
   22132 | 2023-05-22 15:45:27 |         MASTER-Amur | (18h 43m 36.01s , +20d 08m 05.3s) |   C |   180 | 17.2 |        
   22344 | 2023-05-22 15:48:59 |         MASTER-Amur | (18h 35m 09.40s , +20d 07m 41.9s) |   C |   180 | 17.5 |        
   22769 | 2023-05-22 15:56:04 |         MASTER-Amur | (18h 43m 34.40s , +20d 08m 24.9s) |   C |   180 | 17.2 |        
   22982 | 2023-05-22 15:59:36 |         MASTER-Amur | (16h 31m 50.40s , +45d 25m 20.0s) |   C |   180 | 14.3 |        
   48017 | 2023-05-22 22:56:52 |         MASTER-OAFA | (07h 18m 44.17s , -42d 36m 34.5s) |   C |   180 | 12.6 |        
   48228 | 2023-05-22 23:00:23 |         MASTER-OAFA | (07h 15m 28.04s , -40d 41m 57.3s) |   C |   180 | 13.1 |        
   48803 | 2023-05-22 23:09:57 |         MASTER-OAFA | (07h 06m 02.65s , -40d 42m 60.0s) |   C |   180 | 13.0 |        
   49015 | 2023-05-22 23:13:29 |         MASTER-OAFA | (07h 28m 37.57s , -42d 35m 27.3s) |   C |   180 | 13.4 |        
   49785 | 2023-05-22 23:26:19 |         MASTER-OAFA | (07h 28m 30.09s , -42d 37m 57.4s) |   C |   180 | 12.3 |        
   50199 | 2023-05-22 23:33:14 |         MASTER-OAFA | (06h 47m 20.76s , -42d 40m 59.3s) |   C |   180 | 14.3 |        
   50411 | 2023-05-22 23:36:46 |         MASTER-OAFA | (06h 58m 14.22s , -42d 38m 44.8s) |   C |   180 | 13.7 |        
   50622 | 2023-05-22 23:40:17 |         MASTER-OAFA | (07h 23m 04.98s , -38d 48m 52.6s) |   C |   180 | 13.7 |        
   51404 | 2023-05-22 23:53:19 |         MASTER-OAFA | (07h 23m 08.25s , -38d 49m 42.5s) |   C |   180 | 12.8 |        
   51616 | 2023-05-22 23:56:50 |         MASTER-OAFA | (07h 33m 22.49s , -38d 50m 42.4s) |   C |   180 | 12.0 |        
   52038 | 2023-05-23 00:03:53 |         MASTER-OAFA | (07h 46m 00.76s , -40d 42m 18.2s) |   C |   180 | 12.1 |        
   53528 | 2023-05-23 00:28:42 |         MASTER-OAFA | (06h 51m 18.26s , -36d 31m 33.9s) |   C |   180 | 14.1 |        
   53950 | 2023-05-23 00:35:45 |         MASTER-OAFA | (07h 47m 35.99s , -42d 08m 14.1s) |   C |   180 | 12.9 |        
Filter C is a clear (unfiltred) band. 


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


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