GRB 210101A
GCN Circular 29215
Subject
GRB 210101A: Fermi GBM Final Real-time Localization
Date
2021-01-01T15:03:31Z (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 14:53:06 UT on 1 Jan 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210101A (trigger 631205591.859738 / 210101620).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 136.7, Dec = 50.1 (J2000 degrees, equivalent to J2000 09h 06m, 50d 06'), with a statistical uncertainty of 4.6 degrees.
The angle from the Fermi LAT boresight is 147.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210101620/quicklook/glg_skymap_all_bn210101620.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/bn210101620/quicklook/glg_healpix_all_bn210101620.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210101620/quicklook/glg_lc_medres34_bn210101620.gif
GCN Circular 29216
Subject
GRB 210101A: BALROG localization (Fermi Trigger 631205591 / GRB 210101620)
Date
2021-01-01T17:05:32Z (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
631205591 at 14:53:06 on 01 Jan. 2021 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) = 149.6+/-3.8 deg
Decl.(2000.0) = 53.1+/-2.4 deg
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB210101620/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB210101620/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB210101620/json
GCN Circular 29222
Subject
Fermi GRB 210101A: Global MASTER-Net observations report
Date
2021-01-02T04:00:09Z (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),
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 210101A ( Fermi GBM team, GCN 29215) errorbox 19545 sec after notice time and 19603 sec after trigger time at 2021-01-01 20:19:50 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 35 deg. The sun altitude is -62.4 deg.
MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 210101A errorbox 38568 sec after notice time and 38626 sec after trigger time at 2021-01-02 01:36:52 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 36 deg. The sun altitude is -81.5 deg.
The galactic latitude b = 42 deg., longitude l = 169 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1516794
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
19633 | 2021-01-01 20:19:50 | MASTER-Tavrida | (08h 53m 10.40s , +56d 17m 44.1s) | C | 60 | 18.0 |
19633 | 2021-01-01 20:19:50 | MASTER-Tavrida | (09h 03m 54.67s , +56d 15m 14.2s) | C | 60 | 18.2 |
20536 | 2021-01-01 20:34:53 | MASTER-Tavrida | (08h 53m 01.80s , +56d 17m 48.0s) | C | 60 | 18.2 |
20536 | 2021-01-01 20:34:53 | MASTER-Tavrida | (09h 03m 45.63s , +56d 15m 32.5s) | C | 60 | 18.1 |
38656 | 2021-01-02 01:36:52 | MASTER-IAC | (09h 23m 12.29s , +56d 10m 19.9s) | C | 60 | 18.2 |
43403 | 2021-01-02 02:56:00 | MASTER-Tavrida | (08h 44m 09.21s , +53d 57m 34.6s) | C | 60 | 18.0 |
43403 | 2021-01-02 02:56:00 | MASTER-Tavrida | (08h 33m 51.91s , +54d 00m 03.2s) | C | 60 | 17.7 |
44349 | 2021-01-02 03:11:45 | MASTER-Tavrida | (08h 44m 05.63s , +53d 56m 08.2s) | C | 60 | 18.0 |
44349 | 2021-01-02 03:11:45 | MASTER-Tavrida | (08h 33m 52.43s , +53d 58m 37.8s) | C | 60 | 18.0 |
45423 | 2021-01-02 03:29:40 | MASTER-Tavrida | (08h 44m 05.11s , +53d 57m 15.1s) | C | 60 | 18.0 |
45423 | 2021-01-02 03:29:40 | MASTER-Tavrida | (08h 33m 50.61s , +54d 00m 16.0s) | C | 60 | 18.0 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.