GRB 211204A
GCN Circular 31167
Subject
GRB 211204A: Fermi GBM Final Real-time Localization
Date
2021-12-04T03:38:02Z (4 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 03:27:36 UT on 4 Dec 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211204A (trigger 660281261.437168 / 211204144).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 35.4, Dec = -49.5 (J2000 degrees, equivalent to J2000 02h 21m, -49d 30'), with a statistical uncertainty of 10.3 degrees.
The angle from the Fermi LAT boresight is 59.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211204144/quicklook/glg_skymap_all_bn211204144.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211204144/quicklook/glg_healpix_all_bn211204144.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211204144/quicklook/glg_lc_medres34_bn211204144.gif
GCN Circular 31168
Subject
Fermi GRB 211204A: Global MASTER-Net observations report
Date
2021-12-04T03:45:06Z (4 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov,
D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina,
A.Chasovnikov, V.Topolev, V.Grinshpun, 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
(Irkutsk State University, API),
A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov
(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 211204A ( Fermi GBM team, GCN 31167) errorbox 425 sec after notice time and 452 sec after trigger time at 2021-12-04 03:35:08 UT, with upper limit up to 18.4 mag. The observations began at zenith distance = 32 deg. The sun altitude is -35.5 deg.
The galactic latitude b = -62 deg., longitude l = 270 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1803448
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
482 | 2021-12-04 03:35:08 | MASTER-OAFA | (02h 22m 56.00s , -59d 01m 07.3s) | C | 60 | 18.3 |
562 | 2021-12-04 03:36:28 | MASTER-OAFA | (02h 38m 43.63s , -58d 58m 59.5s) | C | 60 | 18.2 |
642 | 2021-12-04 03:37:48 | MASTER-OAFA | (02h 16m 25.09s , -49d 29m 44.3s) | C | 60 | 18.4 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.