GRB 211219B
GCN Circular 31267
Subject
GRB 211219B: Fermi GBM Final Real-time Localization
Date
2021-12-19T22:00:03Z (3 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 21:49:46 UT on 19 Dec 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211219B (trigger 661643391.008452 / 211219910).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 68.5, Dec = -63.2 (J2000 degrees, equivalent to J2000 04h 33m, -63d 12'), with a statistical uncertainty of 3.0 degrees.
The angle from the Fermi LAT boresight is 151.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211219910/quicklook/glg_skymap_all_bn211219910.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/bn211219910/quicklook/glg_healpix_all_bn211219910.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211219910/quicklook/glg_lc_medres34_bn211219910.gif
GCN Circular 31268
Subject
Fermi GRB 211219B: Global MASTER-Net observations report
Date
2021-12-20T05:15:13Z (3 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 211219B ( Fermi GBM team, GCN 31267) errorbox 25126 sec after notice time and 25134 sec after trigger time at 2021-12-20 04:48:40 UT, with upper limit up to 17.9 mag. The observations began at zenith distance = 37 deg. The sun altitude is -35.4 deg.
The galactic latitude b = -39 deg., longitude l = 274 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1820147
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
25164 | 2021-12-20 04:48:40 | MASTER-OAFA | (04h 23m 47.22s , -64d 09m 14.6s) | C | 60 | 17.9 |
25446 | 2021-12-20 04:53:22 | MASTER-OAFA | (04h 41m 43.78s , -64d 06m 58.4s) | C | 60 | 17.7 |
25527 | 2021-12-20 04:54:42 | MASTER-OAFA | (04h 39m 30.62s , -62d 12m 59.3s) | C | 60 | 17.6 |
25606 | 2021-12-20 04:56:02 | MASTER-OAFA | (04h 56m 12.55s , -62d 13m 23.7s) | C | 60 | 17.7 |
25686 | 2021-12-20 04:57:21 | MASTER-OAFA | (04h 42m 48.47s , -66d 01m 55.2s) | C | 60 | 17.7 |
25971 | 2021-12-20 05:02:07 | MASTER-OAFA | (05h 01m 59.43s , -66d 02m 11.3s) | C | 60 | 17.5 |
26050 | 2021-12-20 05:03:26 | MASTER-OAFA | (04h 07m 34.30s , -62d 15m 39.0s) | C | 60 | 17.7 |
26335 | 2021-12-20 05:08:10 | MASTER-OAFA | (04h 24m 17.72s , -62d 14m 19.0s) | C | 60 | 17.7 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 31284
Subject
GRB 211219B: AstroSat CZTI detection
Date
2021-12-23T03:18:31Z (3 years ago)
From
Gaurav Waratkar at IIT,Bombay <gauravwaratkar@iitb.ac.in>
V. Prasad (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao
(IITB), D. Bhattacharya (IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale
(PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al.,
2021, JApA, 42, 73) showed detection of a long GRB 211219B which was
also detected by Fermi-GBM (GCN 31267).
The source was clearly detected in the 20-200 keV energy range. The
light curve showed multiple peaks of emission with the strongest peak at
2021-12-19 21:49:45.50 UT. The measured peak count rate associated with
the burst is 95 (+38, -18) cts/s above the background in the combined
data of two quadrants, with a total of 573 (+196, -205) cts. The local
mean background count rate was 398 (+2, -2) cts/s. Using cumulative
rates, we measure a T90 of 14 (+6, -8) s.
It was also clearly detected in the CsI anticoincidence (Veto) detector
in the 100-500 keV energy range. The light curve peaks at 2021-12-19
21:49:45.056 UT. The measured peak count rate is 280 (+63, -50) cts/s
above the background in the combined Veto data of four quadrants, with a
total of 1460 (+257, -400) cts. The local mean background count rate was
1339 (+5, -3) cts/s. We measure a T90 of 8 (+5, -2) s from the
cumulative Veto light curve.
We also detected another fainter burst, likely from the same source,
that lasted for around 6 s in the CsI anticoincidence (Veto) detector
about 70 s after the primary burst.
CZTI GRB detections are reported regularly on the payload site at
http://astrosat.iucaa.in/czti/?q=grb [1]. CZTI is built by a TIFR-led
consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC,
and PRL. The Indian Space Research Organisation funded, managed, and
facilitated the project.
Links:
------
[1] http://astrosat.iucaa.in/czti/?q=grb