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GCN Circular 34064

Subject
LIGO/Virgo S230622e: Global MASTER-Net observations report
Date
2023-06-22T14:30:26Z (3 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-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the LIGO/Virgo S230622e errorbox 289 sec after trigger time at 2023-06-22 00:23:51 UT, with upper limit up to  17.0 mag. Observations started at twilight.  The observations began at zenith distance = 60 deg. The sun  altitude  is -10.3 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S230622e errorbox 979 sec after trigger time at 2023-06-22 00:35:21 UT, with upper limit up to  20.1 mag. The observations began at zenith distance = 61 deg. The sun  altitude  is -63.3 deg. 

The galactic latitude b = -76 deg., longitude l = 92 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/ligo_1.php?id=12220

We obtain a following upper limits.  

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

     380 | 2023-06-22 00:23:51 |   MASTER-Kislovodsk | (14h 52m 07.65s , +52d 51m 51.6s) |   C |   180 | 17.0 |        
    1069 | 2023-06-22 00:35:21 |         MASTER-SAAO | (00h 17m 30.82s , -15d 25m 31.9s) |   C |   180 | 19.3 |        
    1249 | 2023-06-22 00:35:21 |         MASTER-SAAO | (00h 17m 30.78s , -15d 25m 31.9s) |   C |   540 | 20.1 |  Coadd 
    1069 | 2023-06-22 00:35:21 |         MASTER-SAAO | (00h 16m 42.49s , -15d 25m 31.0s) |   C |   180 | 19.4 |        
    1249 | 2023-06-22 00:35:21 |         MASTER-SAAO | (00h 16m 42.47s , -15d 25m 31.0s) |   C |   540 | 20.1 |  Coadd 
    1281 | 2023-06-22 00:38:53 |         MASTER-SAAO | (00h 17m 30.50s , -15d 24m 29.7s) |   C |   180 | 19.5 |        
    1281 | 2023-06-22 00:38:53 |         MASTER-SAAO | (00h 16m 42.03s , -15d 24m 30.8s) |   C |   180 | 19.5 |        
    1493 | 2023-06-22 00:42:24 |         MASTER-SAAO | (00h 17m 36.10s , -15d 25m 30.2s) |   C |   180 | 19.5 |        
    1493 | 2023-06-22 00:42:24 |         MASTER-SAAO | (00h 16m 47.55s , -15d 25m 31.0s) |   C |   180 | 19.5 |        
    1703 | 2023-06-22 00:45:55 |         MASTER-SAAO | (00h 17m 30.79s , -15d 26m 31.6s) |   C |   180 | 19.5 |        
    1703 | 2023-06-22 00:45:55 |         MASTER-SAAO | (00h 16m 42.21s , -15d 26m 32.4s) |   C |   180 | 19.4 |        
    8058 | 2023-06-22 02:31:50 |         MASTER-SAAO | (04h 06m 16.71s , -38d 51m 26.1s) |   C |   180 | 19.1 |        
    8058 | 2023-06-22 02:31:50 |         MASTER-SAAO | (04h 07m 19.45s , -38d 53m 21.6s) |   C |   180 | 18.7 |        
    8269 | 2023-06-22 02:35:21 |         MASTER-SAAO | (04h 16m 26.57s , -38d 52m 02.1s) |   C |   180 | 19.4 |        
    8269 | 2023-06-22 02:35:21 |         MASTER-SAAO | (04h 17m 29.19s , -38d 53m 57.2s) |   C |   180 | 18.9 |        
   12853 | 2023-06-22 03:51:44 |             MASTER- | (07h 37m 23.10s , +40d 31m 11.9s) |   C |   180 | 15.2 |        
   13536 | 2023-06-22 04:03:08 |             MASTER- | (07h 47m 52.81s , +40d 31m 38.9s) |   C |   180 | 14.1 |        
   19931 | 2023-06-22 05:49:43 |             MASTER- | (10h 21m 08.12s , +38d 38m 12.6s) |   C |   180 | 15.5 |        
   20270 | 2023-06-22 05:55:22 |             MASTER- | (10h 31m 22.78s , +38d 40m 05.7s) |   C |   180 | 16.7 |        
   20816 | 2023-06-22 06:04:27 |             MASTER- | (10h 21m 03.64s , +38d 38m 25.1s) |   C |   180 | 16.7 |        
   21354 | 2023-06-22 06:13:26 |             MASTER- | (10h 31m 29.40s , +38d 38m 29.7s) |   C |   180 | 17.3 |        
   35196 | 2023-06-22 10:05:02 |             MASTER- | (14h 56m 22.83s , +74d 49m 53.9s) |   C |    70 | 18.5 |        
   35296 | 2023-06-22 10:06:32 |             MASTER- | (14h 56m 20.99s , +74d 51m 13.4s) |   C |    90 | 18.4 |        
   35416 | 2023-06-22 10:08:22 |             MASTER- | (14h 56m 22.55s , +74d 49m 48.6s) |   C |   110 | 18.6 |        
   38702 | 2023-06-22 11:02:33 |             MASTER- | (00h 44m 07.17s , +41d 56m 55.9s) |   C |   180 | 17.4 |        
   38902 | 2023-06-22 11:05:54 |             MASTER- | (00h 44m 11.99s , +41d 55m 28.7s) |   C |   180 | 16.5 |        
   39103 | 2023-06-22 11:09:14 |             MASTER- | (00h 44m 05.10s , +41d 54m 24.6s) |   C |   180 | 15.9 |        
Filter C is a clear (unfiltred) band. 


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


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