[vsnet-grb-info 28399] Fermi trigger No 648868114: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30502
SUBJECT: Fermi  trigger No 648868114: Global MASTER-Net observations report 
DATE:    21/07/25 04:16:36 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at 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),

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-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 Fermi GRB210725.05 (trigger No 648868114,22h 36m 02.40s , +14d 57m 00.0s, R=2.12) errorbox  7281 sec after notice time and 7318 sec after trigger time at 2021-07-25 03:10:28 UT, with upper limit up to  16.5 mag. The observations began at zenith distance = 69 deg. The sun  altitude  is -66.6 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB210725.05 errorbox  10528 sec after notice time and 10566 sec after trigger time at 2021-07-25 04:04:35 UT, with upper limit up to  16.8 mag. The observations began at zenith distance = 16 deg. The sun  altitude  is -26.2 deg. 

The galactic latitude b = -37 deg., longitude l = 82 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1669564

We obtain a following upper limits.  

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

    7349 | 2021-07-25 03:10:28 |         MASTER-OAFA | (22h 21m 14.57s , +15d 05m 34.9s) |   C |    60 | 15.4 |        
    7428 | 2021-07-25 03:11:47 |         MASTER-OAFA | (22h 29m 30.54s , +15d 07m 04.9s) |   C |    60 | 14.9 |        
    7648 | 2021-07-25 03:14:27 |         MASTER-OAFA | (22h 37m 36.86s , +13d 13m 46.4s) |   C |   180 | 15.0 |        
    7787 | 2021-07-25 03:17:46 |         MASTER-OAFA | (22h 33m 31.64s , +16d 59m 05.3s) |   C |    60 | 14.4 |        
    7947 | 2021-07-25 03:20:25 |         MASTER-OAFA | (22h 26m 08.88s , +13d 11m 50.3s) |   C |    60 | 15.7 |        
    8026 | 2021-07-25 03:21:45 |         MASTER-OAFA | (22h 34m 20.99s , +13d 13m 13.1s) |   C |    60 | 15.7 |        
    8106 | 2021-07-25 03:23:04 |         MASTER-OAFA | (22h 36m 53.22s , +15d 07m 10.0s) |   C |    60 | 15.4 |        
    8185 | 2021-07-25 03:24:24 |         MASTER-OAFA | (22h 45m 12.33s , +15d 06m 01.8s) |   C |    60 | 14.6 |        
    8265 | 2021-07-25 03:25:44 |         MASTER-OAFA | (22h 21m 14.43s , +15d 05m 30.5s) |   C |    60 | 16.3 |        
    8345 | 2021-07-25 03:27:04 |         MASTER-OAFA | (22h 29m 36.29s , +15d 05m 32.0s) |   C |    60 | 15.9 |        
    8504 | 2021-07-25 03:29:43 |         MASTER-OAFA | (22h 26m 13.55s , +17d 01m 15.1s) |   C |    60 | 15.9 |        
    8584 | 2021-07-25 03:31:03 |         MASTER-OAFA | (22h 31m 43.15s , +18d 55m 09.6s) |   C |    60 | 15.5 |        
    8723 | 2021-07-25 03:32:22 |         MASTER-OAFA | (22h 37m 47.34s , +13d 13m 01.3s) |   C |   180 | 16.2 |        
    8863 | 2021-07-25 03:35:42 |         MASTER-OAFA | (22h 40m 07.75s , +18d 53m 01.5s) |   C |    60 | 15.5 |        
    8943 | 2021-07-25 03:37:02 |         MASTER-OAFA | (22h 33m 42.83s , +16d 59m 28.3s) |   C |    60 | 15.9 |        
    9022 | 2021-07-25 03:38:21 |         MASTER-OAFA | (22h 41m 58.13s , +17d 01m 01.9s) |   C |    60 | 15.8 |        
    9102 | 2021-07-25 03:39:41 |         MASTER-OAFA | (22h 26m 12.41s , +13d 11m 57.9s) |   C |    60 | 16.4 |        
    9184 | 2021-07-25 03:41:03 |         MASTER-OAFA | (22h 34m 26.34s , +13d 13m 20.2s) |   C |    60 | 16.3 |        
    9264 | 2021-07-25 03:42:23 |         MASTER-OAFA | (22h 36m 57.47s , +15d 06m 21.5s) |   C |    60 | 16.2 |        
    9344 | 2021-07-25 03:43:43 |         MASTER-OAFA | (22h 45m 11.38s , +15d 07m 13.0s) |   C |    60 | 16.0 |        
    9505 | 2021-07-25 03:46:24 |         MASTER-OAFA | (22h 26m 09.65s , +16d 59m 29.1s) |   C |    60 | 16.5 |        
    9585 | 2021-07-25 03:47:44 |         MASTER-OAFA | (22h 31m 51.53s , +18d 53m 24.5s) |   C |    60 | 16.3 |        
   10596 | 2021-07-25 04:04:35 |          MASTER-IAC | (22h 32m 56.58s , +14d 22m 21.8s) |   C |    60 | 16.8 |        
   10596 | 2021-07-25 04:04:35 |          MASTER-IAC | (22h 24m 38.52s , +14d 27m 45.1s) |   C |    60 | 16.5 |        
Filter C is a clear (unfiltred) band. 


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