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GCN Circular 33993

Subject
LIGO/Virgo S230617aj: Global MASTER-Net observations report
Date
2023-06-18T06:37:40Z (8 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-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the LIGO/Virgo S230617aj errorbox  12776 sec after notice time and 12827 sec after trigger time at 2023-06-17 15:56:56 UT, with upper limit up to  14.6 mag. Observations started at twilight.  The observations began at zenith distance = 64 deg. The sun  altitude  is -14.0 deg. 

The galactic latitude b = 60 deg., longitude l = 316 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/ligo_1.php?id=12076

We obtain a following upper limits.  

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

   12917 | 2023-06-17 15:56:56 |        MASTER-Tunka | (12h 22m 10.58s , +11d 36m 39.9s) |   C |   180 | 14.6 |        
   18909 | 2023-06-17 17:36:48 |        MASTER-Tunka | (11h 04m 56.55s , +39d 59m 34.2s) |   C |   180 | 14.4 |        
   19507 | 2023-06-17 17:46:46 |        MASTER-Tunka | (11h 44m 29.74s , +32d 26m 57.5s) |   C |   180 | 14.4 |        
   20105 | 2023-06-17 17:56:44 |        MASTER-Tunka | (10h 41m 37.50s , +43d 45m 39.7s) |   C |   180 | 14.5 |        
   21698 | 2023-06-17 18:23:16 |        MASTER-Tunka | (11h 03m 02.49s , +41d 52m 32.0s) |   C |   180 | 14.0 |        
   53450 | 2023-06-18 03:12:29 |             MASTER- | (11h 08m 29.72s , +42d 44m 32.7s) |   C |   180 | 12.5 |        
   54332 | 2023-06-18 03:27:11 |             MASTER- | (10h 57m 37.91s , +42d 43m 58.0s) |   C |   180 | 17.9 |        
   54532 | 2023-06-18 03:30:31 |             MASTER- | (11h 08m 28.59s , +42d 44m 08.5s) |   C |   180 | 17.9 |        
   55890 | 2023-06-18 03:54:34 |             MASTER- | (13h 05m 46.28s , +03d 07m 00.1s) |   C |    10 | 15.6 |        
   55925 | 2023-06-18 03:55:03 |             MASTER- | (13h 05m 39.10s , +03d 06m 26.2s) |   C |    20 | 16.1 |        
   55970 | 2023-06-18 03:55:43 |             MASTER- | (13h 05m 39.18s , +03d 07m 22.9s) |   C |    30 | 16.5 |        
   56025 | 2023-06-18 03:56:33 |             MASTER- | (13h 05m 46.50s , +03d 06m 21.0s) |   C |    40 | 16.6 |        
   56090 | 2023-06-18 03:57:33 |             MASTER- | (13h 05m 39.38s , +03d 05m 15.2s) |   C |    50 | 16.7 |        
   56165 | 2023-06-18 03:58:43 |             MASTER- | (13h 05m 45.56s , +03d 05m 28.0s) |   C |    60 | 17.1 |        
   56255 | 2023-06-18 04:00:03 |             MASTER- | (13h 05m 43.45s , +03d 06m 46.1s) |   C |    80 | 17.1 |        
   56364 | 2023-06-18 04:01:43 |             MASTER- | (13h 05m 43.55s , +03d 05m 19.1s) |   C |   100 | 17.1 |        
   56495 | 2023-06-18 04:03:43 |             MASTER- | (13h 05m 45.80s , +03d 06m 22.1s) |   C |   120 | 17.1 |        
   56649 | 2023-06-18 04:06:03 |             MASTER- | (13h 05m 39.76s , +03d 05m 40.1s) |   C |   150 | 17.2 |        
   56834 | 2023-06-18 04:08:53 |             MASTER- | (13h 05m 41.02s , +03d 06m 28.9s) |   C |   180 | 17.5 |        
   57034 | 2023-06-18 04:12:12 |             MASTER- | (13h 05m 46.13s , +03d 05m 19.2s) |   C |   180 | 17.1 |        
   57234 | 2023-06-18 04:15:32 |             MASTER- | (13h 05m 41.10s , +03d 04m 04.8s) |   C |   180 | 17.1 |        
   57434 | 2023-06-18 04:18:52 |             MASTER- | (13h 05m 47.15s , +03d 04m 20.9s) |   C |   180 | 17.1 |        
   57633 | 2023-06-18 04:22:12 |             MASTER- | (13h 05m 43.91s , +03d 05m 17.5s) |   C |   180 | 17.1 |        
   57908 | 2023-06-18 04:26:47 |             MASTER- | (13h 05m 44.00s , +03d 03m 28.8s) |   C |   180 | 17.0 |        
   58249 | 2023-06-18 04:32:28 |             MASTER- | (13h 05m 46.27s , +03d 04m 44.6s) |   C |   180 | 17.5 |        
   58590 | 2023-06-18 04:38:08 |             MASTER- | (13h 05m 41.53s , +03d 03m 36.1s) |   C |   180 | 17.4 |        
   58930 | 2023-06-18 04:43:48 |             MASTER- | (13h 05m 41.51s , +03d 04m 11.9s) |   C |   180 | 17.4 |        
   59270 | 2023-06-18 04:49:29 |             MASTER- | (13h 05m 47.82s , +03d 02m 50.2s) |   C |   180 | 17.4 |        
   59610 | 2023-06-18 04:55:09 |             MASTER- | (13h 05m 41.79s , +03d 01m 24.4s) |   C |   180 | 17.5 |        
   59950 | 2023-06-18 05:00:48 |             MASTER- | (13h 05m 47.06s , +03d 01m 21.0s) |   C |   180 | 17.5 |        
   60289 | 2023-06-18 05:06:27 |             MASTER- | (13h 05m 45.21s , +03d 02m 35.5s) |   C |   180 | 17.5 |        
   60628 | 2023-06-18 05:12:07 |             MASTER- | (13h 05m 45.48s , +03d 00m 24.9s) |   C |   180 | 17.4 |        
   60970 | 2023-06-18 05:17:48 |             MASTER- | (13h 05m 48.00s , +03d 01m 29.2s) |   C |   180 | 17.5 |        
   61310 | 2023-06-18 05:23:29 |             MASTER- | (13h 05m 42.33s , +03d 00m 21.8s) |   C |   180 | 17.4 |        
   61648 | 2023-06-18 05:29:07 |             MASTER- | (13h 05m 43.64s , +03d 00m 56.9s) |   C |   180 | 17.5 |        
   61988 | 2023-06-18 05:34:47 |             MASTER- | (13h 05m 50.20s , +02d 59m 33.6s) |   C |   180 | 17.5 |        
   62328 | 2023-06-18 05:40:26 |             MASTER- | (13h 05m 43.38s , +02d 58m 07.1s) |   C |   180 | 17.5 |        
   62667 | 2023-06-18 05:46:06 |             MASTER- | (13h 05m 51.08s , +02d 57m 49.5s) |   C |   180 | 17.5 |        
   63008 | 2023-06-18 05:51:47 |             MASTER- | (13h 05m 48.14s , +02d 59m 05.5s) |   C |   180 | 17.5 |        
   63348 | 2023-06-18 05:57:27 |             MASTER- | (13h 05m 48.59s , +02d 57m 10.3s) |   C |   180 | 17.5 |        
   63689 | 2023-06-18 06:03:08 |             MASTER- | (13h 05m 51.22s , +02d 58m 24.1s) |   C |   180 | 17.5 |        
   64029 | 2023-06-18 06:08:48 |             MASTER- | (13h 05m 45.56s , +02d 57m 00.2s) |   C |   180 | 17.5 |        
   64370 | 2023-06-18 06:14:29 |             MASTER- | (13h 05m 46.01s , +02d 57m 32.2s) |   C |   180 | 17.5 |        
   64710 | 2023-06-18 06:20:09 |             MASTER- | (13h 05m 52.68s , +02d 56m 09.9s) |   C |   180 | 17.5 |        
   65051 | 2023-06-18 06:25:50 |             MASTER- | (13h 05m 47.05s , +02d 54m 44.4s) |   C |   180 | 17.5 |        
Filter C is a clear (unfiltred) band. 


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


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