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GCN Circular 27649

Subject
IceCube Alert 200425.98: Global MASTER-Net observations report
Date
2020-04-26T00:13:21Z (4 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, 
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
D.Kuvshinov,  D. Cheryasov
(Lomonosov Moscow State University, SAI, Physics Department),

R. Podesta, C.Lopez, F. Podesta, C.Francile 
(Observatorio Astronomico Felix Aguilar OAFA),

H.Levato 
(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),

R. Rebolo, M. Serra 
(The Instituto de Astrofisica de Canarias),

D. Buckley 
(South African Astronomical Observatory),

O.A. Gres, N.M. Budnev, O.Ershova 
(Irkutsk State University, API),

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

V. Yurkov, A. Gabovich, Yu. Sergienko 
(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) was pointed to the IceCube Alert 200425.98 (trigger No 16038252,06h 42m 20.64s , +52d 38m 52.8s, R=0.95) errorbox  12 sec after notice time and 1171 sec after trigger time at 2020-04-25 23:46:17 UT, with upper limit up to  18.3 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -23.0 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) was pointed to the IceCube Alert 200425.98 errorbox  26 sec after notice time and 1185 sec after trigger time at 2020-04-25 23:46:32 UT, with upper limit up to  18.5 mag. The observations began at zenith distance = 71 deg. The sun  altitude  is -44.8 deg. 

The galactic latitude b = 20 deg., longitude l = 163 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1344471

We obtain a following upper limits.  

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

    1261 | 2020-04-25 23:46:17 |   MASTER-Kislovodsk | (06h 42m 22.49s , +52d 57m 03.7s) |  P| |   180 | 17.0 |        
    1261 | 2020-04-25 23:46:17 |   MASTER-Kislovodsk | (06h 41m 56.14s , +52d 28m 56.6s) |  P- |   180 | 16.9 |        
    1276 | 2020-04-25 23:46:32 |          MASTER-IAC | (06h 40m 51.60s , +52d 37m 09.8s) |  P| |   180 | 17.7 |        
    1456 | 2020-04-25 23:46:32 |          MASTER-IAC | (06h 40m 51.60s , +52d 37m 09.8s) |  P| |   540 | 18.5 |  Coadd 
    1276 | 2020-04-25 23:46:32 |          MASTER-IAC | (06h 39m 42.85s , +52d 41m 34.2s) |  P- |   180 | 17.5 |        
    1456 | 2020-04-25 23:46:32 |          MASTER-IAC | (06h 39m 42.85s , +52d 41m 34.2s) |  P- |   540 | 18.4 |  Coadd 
    1462 | 2020-04-25 23:49:38 |   MASTER-Kislovodsk | (06h 42m 19.93s , +52d 58m 21.8s) |  P| |   180 | 17.5 |        
    1462 | 2020-04-25 23:49:38 |   MASTER-Kislovodsk | (06h 41m 53.58s , +52d 30m 15.3s) |  P- |   180 | 17.5 |        
    1642 | 2020-04-25 23:49:38 |   MASTER-Kislovodsk | (06h 41m 53.57s , +52d 30m 15.3s) |  P- |   540 | 18.3 |  Coadd 
    1512 | 2020-04-25 23:50:28 |          MASTER-IAC | (06h 40m 57.74s , +52d 37m 04.9s) |  P| |   180 | 18.0 |        
    1512 | 2020-04-25 23:50:28 |          MASTER-IAC | (06h 39m 48.90s , +52d 41m 29.6s) |  P- |   180 | 17.7 |        
    1663 | 2020-04-25 23:52:59 |   MASTER-Kislovodsk | (06h 42m 20.41s , +52d 56m 42.2s) |  P| |   180 | 17.6 |        
    1663 | 2020-04-25 23:52:59 |   MASTER-Kislovodsk | (06h 41m 53.97s , +52d 28m 35.9s) |  P- |   180 | 17.5 |        
    1754 | 2020-04-25 23:54:30 |          MASTER-IAC | (06h 40m 53.95s , +52d 38m 50.7s) |  P| |   180 | 18.1 |        
    1754 | 2020-04-25 23:54:30 |          MASTER-IAC | (06h 39m 45.11s , +52d 43m 15.2s) |  P- |   180 | 17.9 |        
    1864 | 2020-04-25 23:56:20 |   MASTER-Kislovodsk | (06h 42m 23.82s , +52d 58m 06.8s) |  P| |   180 | 17.7 |        
    1864 | 2020-04-25 23:56:20 |   MASTER-Kislovodsk | (06h 41m 57.21s , +52d 29m 60.0s) |  P- |   180 | 17.7 |        
    1995 | 2020-04-25 23:58:30 |          MASTER-IAC | (06h 40m 54.07s , +52d 37m 27.0s) |  P| |   180 | 18.1 |        
    1995 | 2020-04-25 23:58:30 |          MASTER-IAC | (06h 39m 45.15s , +52d 41m 51.0s) |  P- |   180 | 17.9 |        


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