[vsnet-grb-info 28366] Fermi trigger No 648278666: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30469
SUBJECT: Fermi  trigger No 648278666: Global MASTER-Net observations report 
DATE:    21/07/18 21:16:03 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-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB210718.23 (trigger No 648278666,19h 19m 55.92s , +19d 28m 58.8s, R=24.13) errorbox  55639 sec after notice time and 55731 sec after trigger time at 2021-07-18 20:53:13 UT, with upper limit up to  17.6 mag. The observations began at zenith distance = 39 deg. The sun  altitude  is -23.8 deg. 

The galactic latitude b =  2 deg., longitude l = 54 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1663373

We obtain a following upper limits.  

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

   36522 | 2021-07-18 15:32:53 |             MASTER- | (19h 54m 40.89s , +44d 05m 18.1s) |   C |    20 | 16.5 |        
   36607 | 2021-07-18 15:34:19 |             MASTER- | (19h 54m 43.51s , +44d 05m 02.6s) |   C |    20 | 16.6 |        
   38548 | 2021-07-18 16:06:39 |             MASTER- | (19h 27m 28.05s , +43d 35m 31.5s) |   C |    20 | 16.8 |        
   38548 | 2021-07-18 16:06:39 |             MASTER- | (19h 16m 50.41s , +42d 13m 35.4s) |   C |    20 | 16.5 |        
   38626 | 2021-07-18 16:07:57 |             MASTER- | (19h 27m 28.67s , +43d 33m 31.3s) |   C |    20 | 16.8 |        
   38626 | 2021-07-18 16:07:57 |             MASTER- | (19h 16m 51.23s , +42d 11m 23.0s) |   C |    20 | 16.6 |        
   39027 | 2021-07-18 16:14:39 |             MASTER- | (19h 14m 02.23s , +05d 29m 24.6s) |   C |    20 | 15.9 |        
   39027 | 2021-07-18 16:14:39 |             MASTER- | (19h 06m 23.24s , +04d 06m 14.2s) |   C |    20 | 15.3 |        
   39473 | 2021-07-18 16:22:04 |             MASTER- | (19h 22m 30.82s , +45d 27m 36.2s) |   C |    20 | 16.5 |        
   39473 | 2021-07-18 16:22:05 |             MASTER- | (19h 11m 30.02s , +44d 04m 44.6s) |   C |    20 | 16.5 |        
   39548 | 2021-07-18 16:23:19 |             MASTER- | (19h 22m 28.22s , +45d 28m 15.4s) |   C |    20 | 16.9 |        
   39548 | 2021-07-18 16:23:19 |             MASTER- | (19h 11m 27.25s , +44d 05m 26.6s) |   C |    20 | 16.9 |        
   39611 | 2021-07-18 16:24:23 |             MASTER- | (18h 50m 02.18s , +44d 04m 60.0s) |   C |    20 | 16.7 |        
   39693 | 2021-07-18 16:25:45 |             MASTER- | (18h 50m 03.96s , +44d 04m 21.6s) |   C |    20 | 16.4 |        
   40143 | 2021-07-18 16:33:14 |             MASTER- | (18h 41m 16.24s , +39d 47m 28.2s) |   C |    20 | 15.8 |        
   40143 | 2021-07-18 16:33:14 |             MASTER- | (18h 31m 13.34s , +38d 24m 06.4s) |   C |    20 | 15.5 |        
   40217 | 2021-07-18 16:34:28 |             MASTER- | (18h 41m 11.33s , +39d 47m 45.5s) |   C |    20 | 15.1 |        
   40217 | 2021-07-18 16:34:28 |             MASTER- | (18h 31m 08.21s , +38d 24m 23.8s) |   C |    20 | 14.6 |        
   40269 | 2021-07-18 16:35:21 |             MASTER- | (19h 14m 01.34s , +05d 29m 42.3s) |   C |    20 | 15.3 |        
   40269 | 2021-07-18 16:35:21 |             MASTER- | (19h 06m 22.98s , +04d 06m 26.5s) |   C |    20 | 14.8 |        
   40309 | 2021-07-18 16:36:00 |             MASTER- | (19h 12m 45.06s , +36d 18m 24.1s) |   C |    20 | 15.3 |        
   40309 | 2021-07-18 16:36:00 |             MASTER- | (19h 03m 08.70s , +34d 55m 30.8s) |   C |    20 | 15.3 |        
   40339 | 2021-07-18 16:36:31 |             MASTER- | (19h 14m 36.55s , +36d 18m 29.8s) |   C |    20 | 15.5 |        
   40339 | 2021-07-18 16:36:31 |             MASTER- | (19h 05m 00.09s , +34d 55m 36.9s) |   C |    20 | 15.4 |        
   40381 | 2021-07-18 16:37:12 |             MASTER- | (19h 12m 47.71s , +36d 22m 21.9s) |   C |    20 | 15.8 |        
   40381 | 2021-07-18 16:37:13 |             MASTER- | (19h 03m 10.80s , +34d 59m 33.3s) |   C |    20 | 15.6 |        
   40416 | 2021-07-18 16:37:47 |             MASTER- | (19h 14m 34.38s , +36d 22m 53.9s) |   C |    20 | 15.3 |        
   40416 | 2021-07-18 16:37:47 |             MASTER- | (19h 04m 57.37s , +35d 00m 06.6s) |   C |    20 | 15.0 |        
   40490 | 2021-07-18 16:39:01 |             MASTER- | (18h 46m 34.40s , +37d 32m 31.8s) |   C |    20 | 14.8 |        
   40490 | 2021-07-18 16:39:01 |             MASTER- | (18h 36m 50.72s , +36d 09m 20.8s) |   C |    20 | 14.6 |        
   55761 | 2021-07-18 20:53:13 |      MASTER-Tavrida | (19h 09m 46.49s , +05d 00m 41.9s) |   C |    60 | 17.6 |        
   55761 | 2021-07-18 20:53:13 |      MASTER-Tavrida | (19h 16m 49.13s , +04d 51m 51.0s) |   C |    60 | 17.5 |        
Filter C is a clear (unfiltred) band. 


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