GRB 230805A
GCN Circular 34338
Subject
GRB 230805A: Fermi GBM Final Real-time Localization
Date
2023-08-05T07:26:53Z (2 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB
At 07:16:16 UT on 5 Aug 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230805A (trigger 712912581.49606 / 230805303).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 44.7, Dec = 47.6 (J2000 degrees, equivalent to J2000 02h 58m, 47d 36'), with a statistical uncertainty of 6.5 degrees.
The angle from the Fermi LAT boresight is 77.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230805303/quicklook/glg_skymap_all_bn230805303.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230805303/quicklook/glg_healpix_all_bn230805303.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230805303/quicklook/glg_lc_medres34_bn230805303.gif
GCN Circular 34344
Subject
Fermi GRB 230805A: Global MASTER-Net observations report
Date
2023-08-05T20:45:51Z (2 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,
G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin
(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
(Irkutsk State University, API),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez
(INAOE, Guillermo Haro Astrophysics Observatory),
A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov
(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 230805A ( Fermi GBM team, GCN 34338) errorbox 23358 sec after notice time and 23391 sec after trigger time at 2023-08-05 13:46:07 UT, with upper limit up to 14.1 mag. Observations started at twilight. The observations began at zenith distance = 76 deg. The sun altitude is -8.4 deg.
The galactic latitude b = -9 deg., longitude l = 145 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2250244
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
23421 | 2023-08-05 13:46:07 | MASTER-Tunka | (02h 45m 41.38s , +46d 10m 48.2s) | C | 60 | 14.1 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.