[vsnet-grb-info 25506] Fermi trigger No 608935505: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27606
SUBJECT: Fermi  trigger No 608935505: Global MASTER-Net observations report 
DATE:    20/04/19 17:30:17 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),

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-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB200418.86 (trigger No 608935505,04h 50m 21.60s , -00d 59m 24.0s, R=8.06) errorbox  72770 sec after notice time and 72779 sec after trigger time at 2020-04-19 16:57:59 UT, with upper limit up to  18.8 mag. Observations started at twilight.  The observations began at zenith distance = 56 deg. The sun  altitude  is -10.2 deg. 

The galactic latitude b = -27 deg., longitude l = 199 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1340036

We obtain a following upper limits.  

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

   72809 | 2020-04-19 16:57:59 |         MASTER-SAAO | (04h 49m 57.06s , -01d 59m 54.1s) |   C |    60 | 16.4 |        
   72814 | 2020-04-19 16:58:04 |         MASTER-SAAO | (04h 42m 53.56s , -02d 01m 35.6s) |   C |    60 | 16.2 |        
   72889 | 2020-04-19 16:59:19 |         MASTER-SAAO | (04h 49m 37.54s , -00d 00m 47.1s) |   C |    60 | 16.8 |        
   72894 | 2020-04-19 16:59:24 |         MASTER-SAAO | (04h 42m 34.38s , -00d 02m 28.8s) |   C |    60 | 16.9 |        
   72968 | 2020-04-19 17:00:38 |         MASTER-SAAO | (04h 50m 29.09s , -04d 00m 34.8s) |   C |    60 | 17.1 |        
   72974 | 2020-04-19 17:00:43 |         MASTER-SAAO | (04h 43m 24.65s , -04d 02m 15.3s) |   C |    60 | 17.2 |        
   73054 | 2020-04-19 17:02:04 |         MASTER-SAAO | (04h 49m 50.71s , +02d 01m 12.7s) |   C |    60 | 17.0 |        
   73059 | 2020-04-19 17:02:09 |         MASTER-SAAO | (04h 42m 47.28s , +01d 59m 31.8s) |   C |    60 | 17.0 |        
   73134 | 2020-04-19 17:03:23 |         MASTER-SAAO | (04h 49m 52.90s , -02d 00m 45.8s) |   C |    60 | 17.4 |        
   73139 | 2020-04-19 17:03:29 |         MASTER-SAAO | (04h 42m 49.29s , -02d 02m 25.5s) |   C |    60 | 17.5 |        
   73218 | 2020-04-19 17:04:48 |         MASTER-SAAO | (04h 42m 40.27s , -00d 00m 30.9s) |   C |    60 | 17.6 |        
   73370 | 2020-04-19 17:07:20 |         MASTER-SAAO | (04h 42m 43.69s , +01d 59m 28.6s) |   C |    60 | 17.6 |        
   73459 | 2020-04-19 17:08:48 |         MASTER-SAAO | (05h 05m 44.87s , +00d 01m 00.2s) |   C |    60 | 18.0 |        
   73464 | 2020-04-19 17:08:54 |         MASTER-SAAO | (04h 58m 41.45s , -00d 00m 39.0s) |   C |    60 | 18.1 |        
   73538 | 2020-04-19 17:10:08 |         MASTER-SAAO | (05h 05m 50.84s , -02d 00m 08.8s) |   C |    60 | 18.1 |        
   73544 | 2020-04-19 17:10:13 |         MASTER-SAAO | (04h 58m 47.07s , -02d 01m 47.1s) |   C |    60 | 18.2 |        
   73618 | 2020-04-19 17:11:28 |         MASTER-SAAO | (05h 05m 53.73s , +02d 00m 17.2s) |   C |    60 | 18.1 |        
   73623 | 2020-04-19 17:11:33 |         MASTER-SAAO | (04h 58m 50.15s , +01d 58m 38.5s) |   C |    60 | 18.2 |        
   73698 | 2020-04-19 17:12:47 |         MASTER-SAAO | (05h 06m 28.57s , -03d 58m 42.2s) |   C |    60 | 18.6 |        
   73703 | 2020-04-19 17:12:53 |         MASTER-SAAO | (04h 59m 23.94s , -04d 00m 19.7s) |   C |    60 | 18.8 |        
   73777 | 2020-04-19 17:14:07 |         MASTER-SAAO | (05h 05m 40.97s , -00d 00m 01.3s) |   C |    60 | 18.3 |        
   73782 | 2020-04-19 17:14:12 |         MASTER-SAAO | (04h 58m 37.51s , -00d 01m 39.5s) |   C |    60 | 18.6 |        
Filter C is a clear (unfiltred) band. 


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