GRB 200808A
GCN Circular 28230
Subject
GRB 200808A: Fermi GBM Final Real-time Localization
Date
2020-08-08T11:26:13Z (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 11:15:57 UT on 8 Aug 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200808A (trigger 618578162.404866 / 200808469).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 20.1, Dec = 55.5 (J2000 degrees, equivalent to J2000 01h 20m, 55d 30'), with a statistical uncertainty of 5.3 degrees.
The angle from the Fermi LAT boresight is 38.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200808469/quicklook/glg_skymap_all_bn200808469.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/bn200808469/quicklook/glg_healpix_all_bn200808469.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200808469/quicklook/glg_lc_medres34_bn200808469.gif
GCN Circular 28231
Subject
Fermi GRB 200808A: Global MASTER-Net observations report
Date
2020-08-08T15:45:09Z (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),
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-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB 200808A ( Fermi GBM team, GCN 28230) errorbox 15558 sec after notice time and 15585 sec after trigger time at 2020-08-08 15:35:43 UT, with upper limit up to 15.1 mag. The observations began at zenith distance = 48 deg. The sun altitude is -19.8 deg.
The galactic latitude b = 2 deg., longitude l = 125 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1415866
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
15616 | 2020-08-08 15:35:43 | MASTER-Tunka | (01h 17m 33.52s , +55d 38m 40.5s) | C | 60 | 15.1 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 28235
Subject
GRB 200808A: AGILE detection
Date
2020-08-09T13:27:57Z (5 years ago)
From
Alessandro Ursi at INAF/IAPS <alessandro.ursi@gmail.com>
A. Ursi (INAF/IAPS), C. Pittori (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS,
and Univ. Roma Tor Vergata), C. Casentini (INAF/IAPS), A. Argan, M.
Cardillo, Y. Evangelista, G. Piano (INAF/IAPS), F. Lucarelli, F. Verrecchia
(SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, F. Fuschino, N.
Parmiggiani (INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen
University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), F.
Longo (Univ. Trieste and INFN Trieste), A. Giuliani (INAF/IASF-Mi), report
on behalf of the AGILE Team:
The AGILE satellite detected emission most likely associated with the long
burst GRB 200808A reported by Fermi-GBM (GCN #28230). The event is visible
in the scientific ratemeters of the SuperAGILE detector (SA; 18-60 keV),
starting at T0 = 2020-08-08 11:15:05 (UT). The SA light curve shows two
separate emission episodes about 250 s apart. The first episode lasted
about 27 s and released ~4350 counts; the second episode lasted about 50 s
and released ~7900 counts in the detector, above a background rate of 60
Hz. The event has an off-axis angle of about 40 degrees. The SA light curve
can be found at:
http://www.agilescienceapp.it/notices/GRB200808A_AGILE_RMs.png .
No detection is visible in the scientific ratemeters of the MiniCALorimeter
(MCAL; 0.4-100 MeV).
Additional analysis of AGILE data is in progress.