[vsnet-grb-info 28000] Fermi GRB 210529A: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30103
SUBJECT: Fermi GRB 210529A: Global MASTER-Net observations report 
DATE:    21/05/30 07:45:09 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-IAC robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 210529A ( Fermi GBM team, GCN 30100) errorbox  46458 sec after notice time and 46483 sec after trigger time at 2021-05-30 05:10:08 UT, with upper limit up to  16.7 mag. Observations started at twilight.  The observations began at zenith distance = 77 deg. The sun  altitude  is -11.8 deg. 

The galactic latitude b = -78 deg., longitude l = 140 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1624095

We obtain a following upper limits.  

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

   46514 | 2021-05-30 05:10:08 |          MASTER-IAC | (00h 57m 36.05s , -15d 53m 40.4s) |   C |    60 | 16.7 |        
   46594 | 2021-05-30 05:11:28 |          MASTER-IAC | (00h 57m 10.58s , -14d 00m 40.8s) |   C |    60 | 16.6 |        
   46674 | 2021-05-30 05:12:48 |          MASTER-IAC | (00h 58m 11.01s , -17d 49m 42.8s) |   C |    60 | 16.4 |        
   46754 | 2021-05-30 05:14:08 |          MASTER-IAC | (01h 04m 58.61s , -12d 12m 43.3s) |   C |    60 | 14.0 |        
   46754 | 2021-05-30 05:14:08 |          MASTER-IAC | (00h 56m 43.43s , -12d 07m 22.0s) |   C |    60 | 16.4 |        
   46836 | 2021-05-30 05:15:30 |          MASTER-IAC | (01h 12m 13.21s , -12d 05m 52.7s) |   C |    60 | 16.3 |        
   46916 | 2021-05-30 05:16:51 |          MASTER-IAC | (01h 04m 29.02s , -10d 18m 54.0s) |   C |    60 | 15.6 |        
   46916 | 2021-05-30 05:16:51 |          MASTER-IAC | (00h 56m 17.02s , -10d 13m 34.5s) |   C |    60 | 16.5 |        
   46998 | 2021-05-30 05:18:12 |          MASTER-IAC | (01h 12m 50.64s , -14d 00m 03.7s) |   C |    60 | 16.0 |        
   47078 | 2021-05-30 05:19:33 |          MASTER-IAC | (01h 13m 23.94s , -15d 54m 34.5s) |   C |    60 | 15.8 |        
   47159 | 2021-05-30 05:20:53 |          MASTER-IAC | (00h 58m 52.30s , -19d 41m 44.6s) |   C |    60 | 15.9 |        
   47239 | 2021-05-30 05:22:13 |          MASTER-IAC | (00h 50m 47.44s , -17d 54m 11.0s) |   C |    60 | 15.6 |        
   47239 | 2021-05-30 05:22:13 |          MASTER-IAC | (00h 42m 18.76s , -17d 48m 52.0s) |   C |    60 | 16.1 |        
   47319 | 2021-05-30 05:23:33 |          MASTER-IAC | (00h 49m 43.74s , -14d 07m 09.3s) |   C |    60 | 15.6 |        
   47319 | 2021-05-30 05:23:33 |          MASTER-IAC | (00h 41m 24.57s , -14d 01m 51.4s) |   C |    60 | 16.1 |        
   47497 | 2021-05-30 05:26:31 |          MASTER-IAC | (01h 06m 02.18s , -15d 59m 14.5s) |   C |    60 | 13.5 |        
   47497 | 2021-05-30 05:26:31 |          MASTER-IAC | (00h 57m 38.54s , -15d 53m 54.9s) |   C |    60 | 15.5 |        
   47577 | 2021-05-30 05:27:52 |          MASTER-IAC | (01h 05m 26.30s , -14d 06m 33.0s) |   C |    60 | 14.7 |        
   47577 | 2021-05-30 05:27:52 |          MASTER-IAC | (00h 57m 07.11s , -14d 01m 14.4s) |   C |    60 | 15.3 |        
   47657 | 2021-05-30 05:29:11 |          MASTER-IAC | (01h 06m 46.47s , -17d 53m 33.8s) |   C |    60 | 13.4 |        
   47657 | 2021-05-30 05:29:11 |          MASTER-IAC | (00h 58m 17.69s , -17d 48m 14.3s) |   C |    60 | 14.2 |        
   47738 | 2021-05-30 05:30:32 |          MASTER-IAC | (01h 04m 53.32s , -12d 12m 01.0s) |   C |    60 | 14.2 |        
Filter C is a clear (unfiltred) band. 


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