Gamma-ray Burst 211219A

(All information courtesy of the instrument teams.)

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Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 19 Dec 21 14:55:56 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      58
TRIGGER_NUM:     661618527
GRB_RA:           59.417d {+03h 57m 40s} (J2000),
                  59.626d {+03h 58m 30s} (current),
                  58.940d {+03h 55m 46s} (1950)
GRB_DEC:         -34.417d {-34d 25' 00"} (J2000),
                 -34.355d {-34d 21' 16"} (current),
                 -34.559d {-34d 33' 33"} (1950)
GRB_ERROR:       6.82 [deg radius, statistical plus systematic]
GRB_INTEN:       268 [cnts/sec]
DATA_SIGNIF:     16.50 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        19567 TJD;   353 DOY;   21/12/19
GRB_TIME:        53722.57 SOD {14:55:22.57} UT
GRB_PHI:         242.00 [deg]
GRB_THETA:       100.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.40
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      95%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
SUN_POSTN:       267.74d {+17h 50m 58s}  -23.42d {-23d 25' 09"}
SUN_DIST:        116.35 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:       92.94d {+06h 11m 46s}  +26.08d {+26d 04' 53"}
MOON_DIST:        68.19 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      235.13,-49.69 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       45.48,-53.23 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211219622/quicklook/glg_lc_medres34_bn211219622.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 19 Dec 21 14:55:47 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      46
TRIGGER_NUM:     661618527
GRB_RA:           58.967d {+03h 55m 52s} (J2000),
                  59.177d {+03h 56m 42s} (current),
                  58.489d {+03h 53m 57s} (1950)
GRB_DEC:         -34.233d {-34d 13' 59"} (J2000),
                 -34.170d {-34d 10' 13"} (current),
                 -34.378d {-34d 22' 39"} (1950)
GRB_ERROR:       8.35 [deg radius, statistical plus systematic]
GRB_INTEN:       365 [cnts/sec]
DATA_SIGNIF:     11.50 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        19567 TJD;   353 DOY;   21/12/19
GRB_TIME:        53722.57 SOD {14:55:22.57} UT
GRB_PHI:         242.00 [deg]
GRB_THETA:       100.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.39
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   3%  Generic Transient
SUN_POSTN:       267.74d {+17h 50m 58s}  -23.42d {-23d 25' 09"}
SUN_DIST:        116.33 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:       92.94d {+06h 11m 45s}  +26.08d {+26d 04' 52"}
MOON_DIST:        68.23 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      234.82,-50.05 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       45.00,-52.93 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211219622/quicklook/glg_lc_medres34_bn211219622.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 19 Dec 21 14:56:05 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     661618527
GRB_RA:           63.270d {+04h 13m 05s} (J2000),
                  63.488d {+04h 13m 57s} (current),
                  62.774d {+04h 11m 06s} (1950)
GRB_DEC:         -30.200d {-30d 11' 59"} (J2000),
                 -30.145d {-30d 08' 42"} (current),
                 -30.326d {-30d 19' 34"} (1950)
GRB_ERROR:       2.61 [deg radius, statistical only]
DATA_SIGNIF:     26.80 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        19567 TJD;   353 DOY;   21/12/19
GRB_TIME:        53722.57 SOD {14:55:22.57} UT
GRB_PHI:         237.00 [deg]
GRB_THETA:        98.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       267.74d {+17h 50m 58s}  -23.42d {-23d 25' 09"}
SUN_DIST:        121.59 [deg]   Sun_angle= -10.4 [hr] (East of Sun)
MOON_POSTN:       92.94d {+06h 11m 46s}  +26.08d {+26d 04' 53"}
MOON_DIST:        62.90 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      229.37,-46.02 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       52.58,-50.22 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211219622/quicklook/glg_lc_medres34_bn211219622.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_661618527.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        Bright hard burst in the GBM.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 19 Dec 21 15:04:44 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     661618527
GRB_RA:           60.480d {+04h 01m 55s} (J2000),
                  60.699d {+04h 02m 48s} (current),
                  59.982d {+03h 59m 56s} (1950)
GRB_DEC:         -30.540d {-30d 32' 23"} (J2000),
                 -30.480d {-30d 28' 47"} (current),
                 -30.678d {-30d 40' 41"} (1950)
GRB_ERROR:       3.30 [deg radius, statistical only]
GRB_DATE:        19567 TJD;   353 DOY;   21/12/19
GRB_TIME:        53722.57 SOD {14:55:22.57} UT
GRB_PHI:         238.00 [deg]
GRB_THETA:       100.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       267.75d {+17h 51m 00s}  -23.42d {-23d 25' 10"}
SUN_DIST:        120.18 [deg]   Sun_angle= -10.2 [hr] (East of Sun)
MOON_POSTN:       93.02d {+06h 12m 05s}  +26.09d {+26d 05' 08"}
MOON_DIST:        64.47 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      229.35,-48.45 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       48.84,-49.85 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211219622/quicklook/glg_lc_medres34_bn211219622.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211219622/quicklook/glg_locplot_all_bn211219622.png
COMMENTS:        Fermi-GBM Final Position.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file should be available by the time this FINAL notice is produced.  
COMMENTS:        This notice was generated completely by automated pipeline processing.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=9569).

GCN Circular #31265
The Fermi GBM team reports the detection of a likely LONG GRB
At 14:55:22 UT on 19 Dec 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211219A (trigger 661618527.567338 / 211219622).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 60.5, Dec = -30.5 (J2000 degrees, equivalent to J2000 04h 01m, -30d 30'), with a statistical uncertainty of 3.3 degrees.
The angle from the Fermi LAT boresight is 100.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211219622/quicklook/glg_skymap_all_bn211219622.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/bn211219622/quicklook/glg_healpix_all_bn211219622.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211219622/quicklook/glg_lc_medres34_bn211219622.gif
GCN Circular #31266
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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 211219A ( Fermi GBM team, GCN 31265) errorbox 4877 sec after notice time and 4903 sec after trigger time at 2021-12-19 16:17:06 UT, with upper limit up to 14.3 mag. The observations began at zenith distance = 80 deg. The sun altitude is -28.1 deg.
The galactic latitude b = -48 deg., longitude l = 229 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1819804
We obtain a following upper limits.
```
Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    4934 | 2021-12-19 16:17:06 |   MASTER-Kislovodsk | (03h 58m 29.45s , -25d 40m 02.5s) |   C |    60 | 14.2 |        
    5913 | 2021-12-19 16:33:25 |   MASTER-Kislovodsk | (03h 58m 23.82s , -25d 41m 23.6s) |   C |    60 | 14.3 |        
    6073 | 2021-12-19 16:36:05 |   MASTER-Kislovodsk | (03h 45m 18.21s , -27d 33m 24.6s) |   C |    60 | 13.0 |        
    6314 | 2021-12-19 16:40:06 |   MASTER-Kislovodsk | (04h 02m 20.29s , -27d 34m 30.9s) |   C |    60 | 12.3 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
GCN Circular #31269
Aaron Tohuvavohu (U Toronto), James DeLaunay (UAlabama), Gayathri Raman (PSU), Jamie A. Kennea (PSU), report:
Swift/BAT did not localize GRB 211219A (T0: 2021-12-19T14:55:22 UTC, Fermi/GBM GCN 31265, INTEGRAL/SPI-ACS trig #9569).
The Fermi and INTEGRAL notices, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1).
Upon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground.
The BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu, arXiv:2111.01769), detects the burst with a sqrt(TS) of 11.8 in a 4.096 s analysis time bin.
NITRATES results are consistent with a burst coming from outside the coded FOV, with DeltaLLHOut of 5.5. An out of FOV origin is consistent with the Fermi/GBM localization.
See Section 9.1 and Figure 20 in the NITRATES paper for brief descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut.
GUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches.
A live reporting of Swift/BAT event data recovered by GUANO can be found at: https://www.swift.psu.edu/guano/
GCN Circular #31270
A. Ursi (INAF/IAPS), F. Lucarelli, C. Pittori, F. Verrecchia (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, C. Casentini, Y. Evangelista, L. Foffano, E. Menegoni, G. Piano (INAF/IAPS), 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 the long GRB 211219A at T0 = 2021-12-19 14:55:22 (UTC), reported by Fermi GBM (GCN #31265).
The burst is clearly visible in the AGILE scientific ratemeters of the MiniCALorimeter (MCAL; 0.4-100 MeV) and AntiCoincidence (AC; 50-200 keV) detectors. The event lasted about 6.0 s and it released a total number of 7115 counts in the MCAL detector (above a background rate of 1240 Hz), and 18620 counts in the AC detector (above a background rate of 3450 Hz). The AGILE ratemeter light curves can be found at http://www.agilescienceapp.it/notices/GRB211219A_AGILE_RM.png . At the T0, the event was about 63° off-axis.
Additional analysis of AGILE data is in progress. Automatic MCAL GRB alert Notices can be found at: https://gcn.gsfc.nasa.gov/agile_mcal.html.
GCN Circular #31283
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 211219A which was also detected by Fermi (GCN 31265), MASTER-Net (Lipunov et al. GCN 31268), Swift/BAT-GUANO (Tohuvavohu et al., GCN 31269) and AGILE (Ursi et al., GCN 31270).
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 14:55:22.50 UT. The measured peak count rate associated with the burst is 178 (+42, -26) cts/s above the background in the combined data of two quadrants, with a total of 912 (+201, -218) cts. The local mean background count rate was 382 (+2, -3) cts/s. Using cumulative rates, we measure a T90 of 15 (+3, -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 14:55:23.063 UT. The measured peak count rate is 740 (+72, -70) cts/s above the background in the combined Veto data of four quadrants, with a total of 3100 (+285, -308) cts. The local mean background count rate was 1243 (+4, -5) cts/s. We measure a T90 of 11.0 (+0.3, -5.2) s from the cumulative Veto light curve.
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
```
GCN Circular #31346
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the MGNS/BepiColombo and HEND/Mars Odyssey teams,
J. Benkhoff on behalf of the BepiColombo team,
K. Hurley on behalf of the IPN,
D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team,
A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
A. Goldstein, M. S. Briggs, and C. Wilson-Hodge on behalf of the Fermi GBM team,
S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team,
and
W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr, on behalf of the GRS-Odyssey GRB team, report:
A long-duration GRB 211219A (Fermi-GBM detection: Fermi GBM Team, GCN Circ. 31265; Swift/BAT-GUANO detection: Tohuvavohu et al., GCN Circ. 31269; AGILE-MCAL detection: Ursi et al., GCN Circ. 31270; AstroSat-CZTI detection: Prasad et al., GCN Circ. 31283) was detected by Fermi (GBM trigger 661618527), Swift (BAT), AGILE (MCAL), AstroSat (CZTI), Konus-Wind, INTEGRAL (SPI-ACS), Mars-Odyssey (HEND) and BepiColombo (MGNS) at about 53722 s UT (14:55:22). The burst was outside the coded field of view of the BAT.
We have triangulated it to a preliminary, 3 sigma error box whose coordinates are:
```
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    58.652 (03h 54m 37s) -34.619 (-34d 37' 09")
  Corners:
    59.468 (03h 57m 52s) -34.736 (-34d 44' 11")
    57.992 (03h 51m 58s) -34.656 (-34d 39' 23")
    57.835 (03h 51m 20s) -34.491 (-34d 29' 27")
    59.309 (03h 57m 14s) -34.575 (-34d 34' 30")
  ---------------------------------------------
```
The error box area is 676 sq. arcmin, and its maximum dimension is 1.37 deg (the minimum one is 6 arcmin). The Sun distance was 115 deg.
This box may be improved.
The IPN localization is consistent with, but reduces the area of, the Fermi final position.
A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB211219_T53724/IPN

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Jochen Greiner, last update: 31-Dec-2021 [Disclaimer]