Gamma-ray Burst 220219A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 19 Feb 22 11:21:59 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     666962499
GRB_RA:           44.600d {+02h 58m 24s} (J2000),
                  44.893d {+02h 59m 34s} (current),
                  43.940d {+02h 55m 46s} (1950)
GRB_DEC:          +5.833d {+05d 49' 60"} (J2000),
                  +5.921d {+05d 55' 15"} (current),
                  +5.634d {+05d 38' 02"} (1950)
GRB_ERROR:       4.82 [deg radius, statistical plus systematic]
GRB_INTEN:       1180 [cnts/sec]
DATA_SIGNIF:     51.20 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        19629 TJD;    50 DOY;   22/02/19
GRB_TIME:        40894.10 SOD {11:21:34.10} UT
GRB_PHI:         287.00 [deg]
GRB_THETA:        75.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.88
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   1%  Generic Transient
DETECTORS:       0,0,0, 1,1,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       332.85d {+22h 11m 23s}  -11.19d {-11d 11' 26"}
SUN_DIST:         73.70 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      185.38d {+12h 21m 32s}   +2.05d {+02d 03' 16"}
MOON_DIST:       139.75 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      170.63,-44.96 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       43.89,-10.64 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220219473/quicklook/glg_lc_medres34_bn220219473.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 154.75,-18.13 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 19 Feb 22 11:22:08 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      59
TRIGGER_NUM:     666962499
GRB_RA:           44.633d {+02h 58m 32s} (J2000),
                  44.926d {+02h 59m 42s} (current),
                  43.974d {+02h 55m 54s} (1950)
GRB_DEC:          +5.700d {+05d 42' 00"} (J2000),
                  +5.787d {+05d 47' 15"} (current),
                  +5.501d {+05d 30' 03"} (1950)
GRB_ERROR:       4.10 [deg radius, statistical plus systematic]
GRB_INTEN:       1217 [cnts/sec]
DATA_SIGNIF:     105.10 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        19629 TJD;    50 DOY;   22/02/19
GRB_TIME:        40894.10 SOD {11:21:34.10} UT
GRB_PHI:         287.00 [deg]
GRB_THETA:        75.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.77
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
DETECTORS:       0,0,0, 1,1,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       332.85d {+22h 11m 23s}  -11.19d {-11d 11' 25"}
SUN_DIST:         73.70 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      185.39d {+12h 21m 33s}   +2.05d {+02d 03' 13"}
MOON_DIST:       139.74 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      170.79,-45.04 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       43.88,-10.78 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220219473/quicklook/glg_lc_medres34_bn220219473.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 154.75,-18.13 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the CALET_GBM event (trignum=1329304902).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 19 Feb 22 11:22:18 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     666962499
GRB_RA:           42.810d {+02h 51m 14s} (J2000),
                  43.106d {+02h 52m 25s} (current),
                  42.142d {+02h 48m 34s} (1950)
GRB_DEC:          +8.340d {+08d 20' 24"} (J2000),
                  +8.430d {+08d 25' 49"} (current),
                  +8.135d {+08d 08' 05"} (1950)
GRB_ERROR:       1.20 [deg radius, statistical only]
DATA_SIGNIF:     112.30 [sigma]
DATA_INTERVAL:   2.048 [sec]
GRB_DATE:        19629 TJD;    50 DOY;   22/02/19
GRB_TIME:        40894.10 SOD {11:21:34.10} UT
GRB_PHI:         288.00 [deg]
GRB_THETA:        78.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       332.85d {+22h 11m 23s}  -11.19d {-11d 11' 25"}
SUN_DIST:         72.58 [deg]   Sun_angle= -4.7 [hr] (East of Sun)
MOON_POSTN:      185.39d {+12h 21m 33s}   +2.05d {+02d 03' 11"}
MOON_DIST:       140.96 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      166.46,-44.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       42.90, -7.72 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220219473/quicklook/glg_lc_medres34_bn220219473.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_666962499.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.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the CALET_GBM event (trignum=1329304902).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 19 Feb 22 11:22:57 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      2
TRIGGER_NUM:     666962499
GRB_RA:           42.790d {+02h 51m 10s} (J2000),
                  43.086d {+02h 52m 21s} (current),
                  42.122d {+02h 48m 29s} (1950)
GRB_DEC:          +8.380d {+08d 22' 48"} (J2000),
                  +8.470d {+08d 28' 13"} (current),
                  +8.175d {+08d 10' 29"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
DATA_SIGNIF:     123.00 [sigma]
DATA_INTERVAL:   5.120 [sec]
GRB_DATE:        19629 TJD;    50 DOY;   22/02/19
GRB_TIME:        40894.10 SOD {11:21:34.10} UT
GRB_PHI:         288.00 [deg]
GRB_THETA:        78.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       332.85d {+22h 11m 23s}  -11.19d {-11d 11' 25"}
SUN_DIST:         72.58 [deg]   Sun_angle= -4.7 [hr] (East of Sun)
MOON_POSTN:      185.39d {+12h 21m 34s}   +2.05d {+02d 03' 01"}
MOON_DIST:       140.98 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      166.41,-44.15 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       42.90, -7.68 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220219473/quicklook/glg_lc_medres34_bn220219473.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_666962499.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        Bright hard burst in the GBM.  
COMMENTS:        This is likely a Long GRB.  
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.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the CALET_GBM event (trignum=1329304902).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 19 Feb 22 11:31:51 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     666962499
GRB_RA:           41.570d {+02h 46m 17s} (J2000),
                  41.867d {+02h 47m 28s} (current),
                  40.901d {+02h 43m 36s} (1950)
GRB_DEC:          +8.960d {+08d 57' 36"} (J2000),
                  +9.052d {+09d 03' 07"} (current),
                  +8.751d {+08d 45' 02"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
GRB_DATE:        19629 TJD;    50 DOY;   22/02/19
GRB_TIME:        40894.10 SOD {11:21:34.10} UT
GRB_PHI:         289.00 [deg]
GRB_THETA:        79.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       332.85d {+22h 11m 24s}  -11.19d {-11d 11' 17"}
SUN_DIST:         71.55 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.47d {+12h 21m 52s}   +2.01d {+02d 00' 50"}
MOON_DIST:       142.08 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:      164.58,-44.43 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       41.91, -6.77 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220219473/quicklook/glg_lc_medres34_bn220219473.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220219473/quicklook/glg_locplot_all_bn220219473.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:        Bright hard burst in the GBM.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(4.0<100sec) coincident with the CALET_GBM event (trignum=1329304902).

GCN Circular #31609
The Fermi GBM team reports the detection of a likely LONG GRB
At 11:21:34 UT on 19 Feb 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220219A (trigger 666962499.096148 / 220219473).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 41.6, Dec = 9.0 (J2000 degrees, equivalent to J2000 02h 46m, 9d 00'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 79.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220219473/quicklook/glg_skymap_all_bn220219473.png
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220219473/quicklook/glg_healpix_all_bn220219473.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220219473/quicklook/glg_lc_medres34_bn220219473.gif
GCN Circular #31610
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 at 11:21:34 on 19 Feb. 2022 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) = 37.8+/-0.7 deg
Decl.(2000.0) = 17.0+/-1.1 deg
```
We estimate an additional systematic error of 2 deg.
Further details are available at: https://grb.mpe.mpg.de/grb/GRB220219473/
The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB220219473/healpix
The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB220219473/json
GCN Circular #31611
A. Ursi (INAF/IAPS), M. Pilia (INAF/OA-Cagliari), 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), F. Lucarelli, C. Pittori, F. Verrecchia (SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, F. Fuschino, N. Parmiggiani (INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen University), 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 Mini-CALorimeter (MCAL) detected the GRB 220219A T0 = 2022-02-19 11:21:35.02 +/- 0.01 s (UTC), reported by Fermi GBM (GCN #31609).
The event lasted about 9.5 s and released a total number of 7450 counts in the MCAL detector (in the 0.4-100 MeV energy range), above an average background rate of 597 Hz. The MCAL light curve can be found at http://www.agilescienceapp.it/notices/077070_GRB_MCAL_572354495.021853.png . The time-integrated spectrum of the burst, from T0-3.0 s to T0+6.5 s, can be fitted in the energy range 0.4-10 MeV with a power-law with ph.ind. = -2.83 (-0.24,+0.28), resulting in a reduced chi-squared of 0.78 (48 d.o.f.) and a fluence of 1.26e-05 erg/cm^2 (90% confidence level), in the same energy range.
The burst is also 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 9 s and it released a total number of 13810 counts in the MCAL detector (above a background rate of 1210 Hz), and 33110 counts in the AC detector (above a background rate of 3370 Hz). The AGILE ratemeter light curves can be found at http://www.agilescienceapp.it/notices/GRB220219A_AGILE_RM.png . At the T0, the event was 140 deg off-axis.
The AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the energy range 0.4-100 MeV. 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 #31621
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the HEND/Mars-Odyssey team,
D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team,
A. Goldstein, M. S. Briggs, and C. Wilson-Hodge on behalf of the Fermi GBM team, and
W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr, and A.S. Gardner on on behalf of the GRS-Odyssey GRB team, report:
The long-duration GRB 220219A (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 31609; BALROG localization: Kunzweiler et al., GCN Circ. 31610; AGILE-MCAL detection: Ursi et al., GCN Circ. 31611) has been detected by Fermi (GBM trigger 666962499), AGILE (MCAL), Konus-Wind, and Mars-Odyssey (HEND), so far, at about 40894 s UT (11:21:34).
We have triangulated it to a preliminary, 3 sigma error box whose coordinates are:
```
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    42.243 (02h 48m 58s) +10.588 (+10d 35' 17")
  Corners:
    43.946 (02h 55m 47s)  +6.216 ( +6d 12' 57")
    39.857 (02h 39m 26s) +17.180 (+17d 10' 49")
    39.457 (02h 37m 50s) +18.548 (+18d 32' 54")
    43.844 (02h 55m 23s)  +6.598 ( +6d 35' 54")
  ---------------------------------------------
```
The error box area is 2243 sq. arcmin, and its maximum dimension is 13.1 deg (the minimum one is 3.1 arcmin). The Sun distance was 72 deg.
This box may be improved.
The IPN localization is consistent with, but reduces the area of, the Fermi GBM Final Real-time position (GCN Circ. 31609) and BALROG (GCN 31610) localizations.
A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB220219_T40894/IPN/
The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.
GCN Circular #31622
A. Tsvetkova, D. Frederiks, A. Lysenko, A. Ridnaia, D. Svinkin, M. Ulanov, and T. Cline on behalf of the Konus-Wind team, report:
The long-duration GRB 220219A (Fermi-GBM detection: The Fermi GBM team, GCN 31609; AGILE/MCAL detection: Ursi at al., GCN31611; IPN triangulation: Kozyrev et al., GCN 31621) triggered Konus-Wind at T0=40894.695 s UT (11:21:34.695).
The burst light curve shows a multi-peaked structure which starts at ~T0-0.4 s and has a total duration of~76.6 s. The emission is seen up to ~15 MeV.
As observed by Konus-Wind, the burst had a fluence of 5.75(-2.01,+1.80)x10^-5 erg/cm2, and a 64-ms peak energy flux, measured from T0+3.792 s, of 1.08(-0.21,+0.21)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
The time-integrated spectrum of the burst (measured from T0 to T0+80.384 s) is best fit in the 20 keV - 15 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -1.01(-0.39,+0.52), the high energy photon index beta = -1.86(-1.11,+0.20), the peak energy Ep = 379(-155,+830) keV, chi2 = 93/97 dof.
The spectrum near the peak count rate (measured from T0 to T0+6.656 s) is best fit in the 20 keV - 15 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -1.03(-0.10,+0.11), and Ep = 480(-57,+73) keV (chi2 = 97/98 dof). Fitting by the GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.29 (chi2 = 96.1/97 dof).
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB220219_T40894/
All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.

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Jochen Greiner, last update: 21-Feb-2022 [Disclaimer]