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GRB 200830A

GCN Circular 28320

Subject
GRB 200830A: Fermi GBM Final Real-time Localization
Date
2020-08-30T10:04:40Z (5 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
The Fermi GBM team reports the detection of a likely LONG GRB

At 09:54:18 UT on 30 Aug 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200830A (trigger 620474063.489866 / 200830413).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 344.8, Dec = 56.5 (J2000 degrees, equivalent to J2000 22h 59m, 56d 30'), with a statistical uncertainty of 7.2 degrees.

The angle from the Fermi LAT boresight is 56.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200830413/quicklook/glg_skymap_all_bn200830413.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200830413/quicklook/glg_healpix_all_bn200830413.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200830413/quicklook/glg_lc_medres34_bn200830413.gif

GCN Circular 28321

Subject
GRB 200830A: BALROG localization (Fermi Trigger 620474063 / GRB 200830413)
Date
2020-08-30T10:20:03Z (5 years ago)
From
Jochen Greiner at MPE,Garching <jcg@mpe.mpg.de>
F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
620474063 at 09:54:18 on 30 Aug. 2020 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).

The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 351.6+/-10.1 deg
Decl.(2000.0) = 44.2+/-3.1 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB200830413/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB200830413/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB200830413/json

GCN Circular 28327

Subject
Fermi GRB 200830A: Global MASTER-Net observations report
Date
2020-08-30T18:00:25Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@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 GRB 200830A ( Fermi GBM team, GCN 28320) errorbox  26966 sec after notice time and 26992 sec after trigger time at 2020-08-30 17:24:11 UT, with upper limit up to  17.8 mag. Observations started at twilight.  The observations began at zenith distance = 40 deg. The sun  altitude  is -11.4 deg. 

The galactic latitude b = -3 deg., longitude l = 108 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1430319

We obtain a following upper limits.  

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

   27023 | 2020-08-30 17:24:11 |      MASTER-Tavrida | (22h 18m 55.98s , +49d 54m 04.7s) |   C |    60 | 17.0 |        
   27103 | 2020-08-30 17:25:31 |      MASTER-Tavrida | (22h 26m 08.03s , +51d 53m 06.1s) |   C |    60 | 16.9 |        
   27184 | 2020-08-30 17:26:52 |      MASTER-Tavrida | (22h 43m 43.82s , +49d 53m 04.9s) |   C |    60 | 17.2 |        
   27345 | 2020-08-30 17:29:33 |      MASTER-Tavrida | (22h 18m 49.49s , +49d 55m 01.4s) |   C |    60 | 17.3 |        
   27425 | 2020-08-30 17:30:53 |      MASTER-Tavrida | (22h 31m 20.87s , +49d 53m 49.1s) |   C |    60 | 17.3 |        
   27506 | 2020-08-30 17:32:14 |      MASTER-Tavrida | (22h 26m 02.03s , +51d 52m 56.0s) |   C |    60 | 17.2 |        
   27586 | 2020-08-30 17:33:34 |      MASTER-Tavrida | (22h 39m 05.41s , +51d 52m 58.3s) |   C |    60 | 17.3 |        
   27667 | 2020-08-30 17:34:55 |      MASTER-Tavrida | (22h 43m 43.82s , +49d 54m 30.6s) |   C |    60 | 17.5 |        
   27748 | 2020-08-30 17:36:16 |      MASTER-Tavrida | (22h 56m 09.16s , +49d 52m 33.7s) |   C |    60 | 17.8 |        
   27828 | 2020-08-30 17:37:36 |      MASTER-Tavrida | (22h 37m 46.61s , +47d 54m 37.7s) |   C |    60 | 17.4 |        
   27908 | 2020-08-30 17:38:56 |      MASTER-Tavrida | (22h 49m 34.87s , +47d 53m 33.4s) |   C |    60 | 17.7 |        
Filter C is a clear (unfiltred) band. 


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

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