GRB 200904A
GCN Circular 28365
Subject
GRB 200904A: Fermi GBM Final Real-time Localization
Date
2020-09-04T02:13:11Z (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 02:02:55 UT on 4 Sep 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200904A (trigger 620877780.28243 / 200904085).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 15.8, Dec = -16.0 (J2000 degrees, equivalent to J2000 01h 03m, -16d 00'), with a statistical uncertainty of 11.6 degrees.
The angle from the Fermi LAT boresight is 102.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200904085/quicklook/glg_skymap_all_bn200904085.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/bn200904085/quicklook/glg_healpix_all_bn200904085.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200904085/quicklook/glg_lc_medres34_bn200904085.gif
GCN Circular 28366
Subject
Fermi GRB 200904A: Global MASTER-Net observations report
Date
2020-09-04T02:45:07Z (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-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 200904A ( Fermi GBM team, GCN 28365) errorbox 533 sec after notice time and 651 sec after trigger time at 2020-09-04 02:13:46 UT, with upper limit up to 17.2 mag. The observations began at zenith distance = 62 deg. The sun altitude is -49.5 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=1433460
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
742 | 2020-09-04 02:13:46 | MASTER-OAFA | (01h 00m 58.86s , -16d 47m 45.9s) | C | 180 | 17.2 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.