[vsnet-grb-info 27916] Fermi GRB 210515B: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30019
SUBJECT: Fermi GRB 210515B: Global MASTER-Net observations report 
DATE:    21/05/15 18:31:04 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-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 Fermi GRB 210515B ( Fermi GBM team, GCN 30016) errorbox  11999 sec after notice time and 12030 sec after trigger time at 2021-05-15 18:17:16 UT, with upper limit up to  16.6 mag. Observations started at twilight.  The observations began at zenith distance = 80 deg. The sun  altitude  is -16.8 deg. 

The galactic latitude b = -0 deg., longitude l = 87 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1613711

We obtain a following upper limits.  

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

     109 | 2021-05-15 14:58:25 |             MASTER- | (21h 06m 02.23s , +47d 23m 09.8s) |   C |    20 | 16.2 |        
     184 | 2021-05-15 14:59:35 |             MASTER- | (21h 04m 42.79s , +45d 59m 02.9s) |   C |    30 | 16.4 |        
    1302 | 2021-05-15 15:18:17 |             MASTER- | (21h 04m 33.28s , +45d 13m 33.8s) |   C |    20 | 16.8 |        
    1332 | 2021-05-15 15:18:48 |             MASTER- | (21h 15m 40.72s , +45d 11m 58.3s) |   C |    20 | 16.6 |        
    1363 | 2021-05-15 15:19:18 |             MASTER- | (21h 04m 09.82s , +47d 06m 43.4s) |   C |    20 | 16.4 |        
    1425 | 2021-05-15 15:20:20 |             MASTER- | (20h 43m 07.59s , +45d 15m 09.1s) |   C |    20 | 17.2 |        
    1455 | 2021-05-15 15:20:51 |             MASTER- | (20h 54m 22.64s , +45d 12m 47.8s) |   C |    20 | 17.0 |        
    1486 | 2021-05-15 15:21:21 |             MASTER- | (21h 06m 08.80s , +43d 18m 34.5s) |   C |    20 | 17.0 |        
    1546 | 2021-05-15 15:22:22 |             MASTER- | (20h 41m 56.56s , +47d 07m 21.0s) |   C |    20 | 17.0 |        
    1579 | 2021-05-15 15:22:54 |             MASTER- | (20h 53m 41.36s , +47d 06m 37.3s) |   C |    20 | 16.8 |        
    1609 | 2021-05-15 15:23:25 |             MASTER- | (21h 05m 07.73s , +48d 59m 53.2s) |   C |    20 | 17.2 |        
    2226 | 2021-05-15 15:33:42 |             MASTER- | (21h 04m 28.00s , +45d 14m 10.8s) |   C |    20 | 16.9 |        
    2258 | 2021-05-15 15:34:14 |             MASTER- | (21h 15m 48.32s , +45d 12m 24.6s) |   C |    20 | 17.2 |        
    2291 | 2021-05-15 15:34:47 |             MASTER- | (21h 04m 05.16s , +47d 06m 15.7s) |   C |    20 | 16.6 |        
    2323 | 2021-05-15 15:35:19 |             MASTER- | (21h 15m 48.75s , +47d 05m 58.6s) |   C |    20 | 17.0 |        
    2389 | 2021-05-15 15:36:24 |             MASTER- | (20h 54m 24.69s , +45d 13m 15.4s) |   C |    20 | 17.4 |        
    2422 | 2021-05-15 15:36:58 |             MASTER- | (21h 06m 17.95s , +43d 20m 01.6s) |   C |    20 | 17.1 |        
    2484 | 2021-05-15 15:37:59 |             MASTER- | (20h 41m 59.09s , +47d 10m 00.2s) |   C |    20 | 17.0 |        
    2513 | 2021-05-15 15:38:29 |             MASTER- | (20h 53m 44.11s , +47d 08m 10.4s) |   C |    20 | 16.9 |        
    2547 | 2021-05-15 15:39:03 |             MASTER- | (21h 05m 06.54s , +49d 00m 25.3s) |   C |    20 | 17.4 |        
    2638 | 2021-05-15 15:40:34 |             MASTER- | (20h 56m 26.27s , +43d 19m 00.9s) |   C |    20 | 17.8 |        
    3137 | 2021-05-15 15:48:52 |             MASTER- | (21h 04m 33.72s , +45d 13m 21.3s) |   C |    20 | 16.5 |        
    3166 | 2021-05-15 15:49:22 |             MASTER- | (21h 15m 51.63s , +45d 13m 45.9s) |   C |    20 | 17.0 |        
    3200 | 2021-05-15 15:49:56 |             MASTER- | (21h 04m 08.23s , +47d 07m 58.2s) |   C |    20 | 15.9 |        
    3230 | 2021-05-15 15:50:26 |             MASTER- | (21h 15m 46.86s , +47d 08m 12.0s) |   C |    20 | 16.7 |        
    3291 | 2021-05-15 15:51:27 |             MASTER- | (20h 54m 23.31s , +45d 13m 44.7s) |   C |    20 | 16.7 |        
    3324 | 2021-05-15 15:52:00 |             MASTER- | (21h 06m 19.64s , +43d 19m 16.3s) |   C |    20 | 16.7 |        
    3386 | 2021-05-15 15:53:01 |             MASTER- | (20h 42m 04.44s , +47d 09m 14.9s) |   C |    20 | 16.2 |        
    3415 | 2021-05-15 15:53:31 |             MASTER- | (20h 53m 46.50s , +47d 09m 36.7s) |   C |    20 | 16.8 |        
    3448 | 2021-05-15 15:54:04 |             MASTER- | (21h 05m 10.58s , +49d 02m 10.8s) |   C |    20 | 15.1 |        
    3509 | 2021-05-15 15:55:05 |             MASTER- | (20h 45m 38.00s , +43d 21m 30.8s) |   C |    20 | 16.5 |        
    3539 | 2021-05-15 15:55:34 |             MASTER- | (20h 56m 26.18s , +43d 19m 46.8s) |   C |    20 | 16.3 |        
   12061 | 2021-05-15 18:17:16 |   MASTER-Kislovodsk | (21h 05m 23.40s , +44d 55m 15.5s) |   C |    60 | 15.6 |        
   12061 | 2021-05-15 18:17:16 |   MASTER-Kislovodsk | (21h 10m 52.80s , +44d 29m 34.6s) |   C |    60 | 14.2 |        
   12221 | 2021-05-15 18:19:57 |   MASTER-Kislovodsk | (21h 05m 04.57s , +46d 48m 41.2s) |   C |    60 | 16.3 |        
   12221 | 2021-05-15 18:19:57 |   MASTER-Kislovodsk | (21h 10m 39.76s , +46d 23m 00.4s) |   C |    60 | 16.6 |        
Filter C is a clear (unfiltred) band. 


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