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GCN Circular 33940

Subject
LIGO/Virgo S230608q: Global MASTER-Net observations report
Date
2023-06-09T06:40:44Z (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, 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 S230608q errorbox  47668 sec after notice time and 47755 sec after trigger time at 2023-06-08 22:38:00 UT, with upper limit up to  19.1 mag. Observations started at twilight.  The observations began at zenith distance = 55 deg. The sun  altitude  is -12.4 deg. 

The galactic latitude b = 43 deg., longitude l = 88 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/ligo_1.php?id=11958

We obtain a following upper limits.  

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

   47845 | 2023-06-08 22:38:00 |         MASTER-OAFA | (08h 40m 42.61s , +10d 16m 17.1s) |   C |   180 | 17.0 |        
   48057 | 2023-06-08 22:41:31 |         MASTER-OAFA | (08h 48m 45.49s , +10d 15m 35.1s) |   C |   180 | 17.5 |        
   48737 | 2023-06-08 22:52:52 |         MASTER-OAFA | (08h 44m 18.11s , +12d 08m 44.5s) |   C |   180 | 18.3 |        
   48948 | 2023-06-08 22:56:23 |         MASTER-OAFA | (08h 52m 26.08s , +12d 10m 26.2s) |   C |   180 | 18.4 |        
   49525 | 2023-06-08 23:05:59 |         MASTER-OAFA | (08h 44m 11.83s , +12d 10m 08.8s) |   C |   180 | 18.5 |        
   49736 | 2023-06-08 23:09:31 |         MASTER-OAFA | (08h 52m 29.57s , +12d 09m 23.8s) |   C |   180 | 18.3 |        
   49948 | 2023-06-08 23:13:02 |         MASTER-OAFA | (08h 59m 46.53s , +12d 08m 37.0s) |   C |   180 | 18.3 |        
   50263 | 2023-06-08 23:18:17 |         MASTER-OAFA | (08h 56m 08.80s , +10d 14m 26.6s) |   C |   180 | 18.3 |        
   61901 | 2023-06-09 02:32:16 |         MASTER-OAFA | (16h 25m 28.81s , +15d 58m 24.4s) |   C |   180 | 18.7 |        
   62475 | 2023-06-09 02:41:50 |         MASTER-OAFA | (16h 17m 14.77s , +15d 56m 35.6s) |   C |   180 | 18.8 |        
   62686 | 2023-06-09 02:45:21 |         MASTER-OAFA | (16h 25m 31.84s , +15d 58m 01.7s) |   C |   180 | 18.7 |        
   62899 | 2023-06-09 02:48:53 |         MASTER-OAFA | (16h 16m 08.41s , +12d 10m 33.0s) |   C |   180 | 18.8 |        
   63321 | 2023-06-09 02:55:56 |         MASTER-OAFA | (16h 11m 25.11s , +17d 51m 42.3s) |   C |   180 | 19.1 |        
   63754 | 2023-06-09 03:03:09 |         MASTER-OAFA | (16h 16m 08.48s , +12d 08m 43.0s) |   C |   180 | 18.8 |        
   64176 | 2023-06-09 03:10:11 |         MASTER-OAFA | (16h 11m 22.37s , +17d 51m 05.9s) |   C |   180 | 18.9 |        
   64388 | 2023-06-09 03:13:42 |         MASTER-OAFA | (16h 19m 51.02s , +17d 52m 10.5s) |   C |   180 | 18.7 |        
   64598 | 2023-06-09 03:17:13 |         MASTER-OAFA | (16h 27m 21.26s , +17d 52m 17.2s) |   C |   180 | 18.6 |        
   65021 | 2023-06-09 03:24:15 |         MASTER-OAFA | (15h 57m 48.76s , +25d 27m 10.4s) |   C |   180 | 18.5 |        
   65231 | 2023-06-09 03:27:46 |         MASTER-OAFA | (16h 06m 39.41s , +25d 28m 17.1s) |   C |   180 | 18.4 |        
   65443 | 2023-06-09 03:31:17 |         MASTER-OAFA | (16h 27m 23.14s , +17d 50m 22.6s) |   C |   180 | 18.5 |        
   66108 | 2023-06-09 03:42:23 |         MASTER-OAFA | (16h 06m 37.05s , +25d 28m 35.5s) |   C |   180 | 18.4 |        
   66320 | 2023-06-09 03:45:54 |         MASTER-OAFA | (15h 56m 46.50s , +27d 20m 45.9s) |   C |   180 | 18.4 |        
   66561 | 2023-06-09 03:49:55 |         MASTER-OAFA | (16h 05m 55.62s , +27d 20m 40.7s) |   C |   180 | 18.4 |        
   67196 | 2023-06-09 04:00:30 |         MASTER-OAFA | (15h 56m 46.30s , +27d 21m 32.2s) |   C |   180 | 18.4 |        
Filter C is a clear (unfiltred) band. 


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