Gamma-ray Burst 220209A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 09 Feb 22 23:01:14 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      48
TRIGGER_NUM:     666140455
GRB_RA:           44.367d {+02h 57m 28s} (J2000),
                  44.884d {+02h 59m 32s} (current),
                  43.209d {+02h 52m 50s} (1950)
GRB_DEC:         +69.683d {+69d 40' 60"} (J2000),
                 +69.771d {+69d 46' 15"} (current),
                 +69.482d {+69d 28' 56"} (1950)
GRB_ERROR:       27.33 [deg radius, statistical plus systematic]
GRB_INTEN:       68 [cnts/sec]
DATA_SIGNIF:     4.90 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        19619 TJD;    40 DOY;   22/02/09
GRB_TIME:        82850.42 SOD {23:00:50.42} UT
GRB_PHI:          50.00 [deg]
GRB_THETA:        55.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      0.36
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      90%  GRB
2nd_MOST_LIKELY:   3%  Cyg X-1
DETECTORS:       1,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       323.56d {+21h 34m 16s}  -14.44d {-14d 26' 14"}
SUN_DIST:        100.57 [deg]   Sun_angle= -5.4 [hr] (East of Sun)
MOON_POSTN:       64.20d {+04h 16m 48s}  +22.03d {+22d 01' 36"}
MOON_DIST:        49.13 [deg]
MOON_ILLUM:      63 [%]
GAL_COORDS:      133.53,  9.45 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       67.38, 49.80 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_lc_medres34_bn220209959.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 5.38,2.63 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 09 Feb 22 23:01:33 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      70
TRIGGER_NUM:     666140455
GRB_RA:           15.967d {+01h 03m 52s} (J2000),
                  16.353d {+01h 05m 25s} (current),
                  15.105d {+01h 00m 25s} (1950)
GRB_DEC:         +71.500d {+71d 30' 00"} (J2000),
                 +71.618d {+71d 37' 06"} (current),
                 +71.232d {+71d 13' 54"} (1950)
GRB_ERROR:       6.30 [deg radius, statistical plus systematic]
GRB_INTEN:       474 [cnts/sec]
DATA_SIGNIF:     49.40 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        19619 TJD;    40 DOY;   22/02/09
GRB_TIME:        82850.42 SOD {23:00:50.42} UT
GRB_PHI:          41.00 [deg]
GRB_THETA:        60.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.49
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      95%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       1,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       323.57d {+21h 34m 16s}  -14.44d {-14d 26' 14"}
SUN_DIST:         92.98 [deg]   Sun_angle= -3.5 [hr] (East of Sun)
MOON_POSTN:       64.20d {+04h 16m 49s}  +22.03d {+22d 01' 38"}
MOON_DIST:        56.49 [deg]
MOON_ILLUM:      63 [%]
GAL_COORDS:      123.93,  8.65 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       56.29, 56.65 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_lc_medres34_bn220209959.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 5.38,2.63 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 09 Feb 22 23:01:23 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      59
TRIGGER_NUM:     666140455
GRB_RA:          351.683d {+23h 26m 44s} (J2000),
                 351.921d {+23h 27m 41s} (current),
                 351.150d {+23h 24m 36s} (1950)
GRB_DEC:         +68.867d {+68d 52' 00"} (J2000),
                 +68.989d {+68d 59' 19"} (current),
                 +68.591d {+68d 35' 29"} (1950)
GRB_ERROR:       10.62 [deg radius, statistical plus systematic]
GRB_INTEN:       294 [cnts/sec]
DATA_SIGNIF:     16.60 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        19619 TJD;    40 DOY;   22/02/09
GRB_TIME:        82850.42 SOD {23:00:50.42} UT
GRB_PHI:          33.00 [deg]
GRB_THETA:        65.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.46
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      91%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       1,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       323.57d {+21h 34m 16s}  -14.44d {-14d 26' 14"}
SUN_DIST:         85.82 [deg]   Sun_angle= -1.9 [hr] (East of Sun)
MOON_POSTN:       64.20d {+04h 16m 48s}  +22.03d {+22d 01' 37"}
MOON_DIST:        63.17 [deg]
MOON_ILLUM:      63 [%]
GAL_COORDS:      115.39,  7.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       42.17, 61.23 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_lc_medres34_bn220209959.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 5.38,2.63 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 09 Feb 22 23:01:31 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     666140455
GRB_RA:           21.390d {+01h 25m 34s} (J2000),
                  21.778d {+01h 27m 07s} (current),
                  20.522d {+01h 22m 05s} (1950)
GRB_DEC:         +66.530d {+66d 31' 48"} (J2000),
                 +66.644d {+66d 38' 40"} (current),
                 +66.270d {+66d 16' 12"} (1950)
GRB_ERROR:       14.50 [deg radius, statistical only]
DATA_SIGNIF:     6.10 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        19619 TJD;    40 DOY;   22/02/09
GRB_TIME:        82850.42 SOD {23:00:50.42} UT
GRB_PHI:          45.00 [deg]
GRB_THETA:        63.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       323.57d {+21h 34m 16s}  -14.44d {-14d 26' 14"}
SUN_DIST:         91.53 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
MOON_POSTN:       64.20d {+04h 16m 48s}  +22.03d {+22d 01' 38"}
MOON_DIST:        52.01 [deg]
MOON_ILLUM:      63 [%]
GAL_COORDS:      126.33,  3.88 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       53.33, 51.61 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_lc_medres34_bn220209959.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_666140455.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
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:     Wed 09 Feb 22 23:02:25 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      0
TRIGGER_NUM:     666140455
GRB_RA:          356.060d {+23h 44m 14s} (J2000),
                 356.320d {+23h 45m 17s} (current),
                 355.477d {+23h 41m 54s} (1950)
GRB_DEC:         +70.490d {+70d 29' 24"} (J2000),
                 +70.613d {+70d 36' 46"} (current),
                 +70.212d {+70d 12' 44"} (1950)
GRB_ERROR:       5.90 [deg radius, statistical only]
DATA_SIGNIF:     13.20 [sigma]
DATA_INTERVAL:   7.168 [sec]
GRB_DATE:        19619 TJD;    40 DOY;   22/02/09
GRB_TIME:        82850.42 SOD {23:00:50.42} UT
GRB_PHI:          34.00 [deg]
GRB_THETA:        63.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       323.57d {+21h 34m 16s}  -14.44d {-14d 26' 13"}
SUN_DIST:         87.98 [deg]   Sun_angle= -2.2 [hr] (East of Sun)
MOON_POSTN:       64.21d {+04h 16m 50s}  +22.03d {+22d 01' 45"}
MOON_DIST:        61.99 [deg]
MOON_ILLUM:      63 [%]
GAL_COORDS:      117.33,  8.35 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       46.73, 60.92 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_lc_medres34_bn220209959.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_666140455.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(7.0<100sec) coincident with the CALET_GBM event (trignum=1328482817).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 09 Feb 22 23:02:36 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      2
TRIGGER_NUM:     666140455
GRB_RA:          354.180d {+23h 36m 43s} (J2000),
                 354.424d {+23h 37m 42s} (current),
                 353.634d {+23h 34m 32s} (1950)
GRB_DEC:         +72.750d {+72d 45' 00"} (J2000),
                 +72.872d {+72d 52' 21"} (current),
                 +72.473d {+72d 28' 23"} (1950)
GRB_ERROR:       1.53 [deg radius, statistical only]
DATA_SIGNIF:     38.50 [sigma]
DATA_INTERVAL:   10.240 [sec]
GRB_DATE:        19619 TJD;    40 DOY;   22/02/09
GRB_TIME:        82850.42 SOD {23:00:50.42} UT
GRB_PHI:          33.00 [deg]
GRB_THETA:        61.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       323.57d {+21h 34m 16s}  -14.44d {-14d 26' 13"}
SUN_DIST:         89.62 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:       64.21d {+04h 16m 51s}  +22.03d {+22d 01' 46"}
MOON_DIST:        63.08 [deg]
MOON_ILLUM:      63 [%]
GAL_COORDS:      117.39, 10.69 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       50.06, 62.64 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_lc_medres34_bn220209959.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_666140455.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(7.0<100sec) coincident with the CALET_GBM event (trignum=1328482817).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 09 Feb 22 23:02:55 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      4
TRIGGER_NUM:     666140455
GRB_RA:          355.860d {+23h 43m 26s} (J2000),
                 356.117d {+23h 44m 28s} (current),
                 355.284d {+23h 41m 08s} (1950)
GRB_DEC:         +71.680d {+71d 40' 48"} (J2000),
                 +71.803d {+71d 48' 10"} (current),
                 +71.402d {+71d 24' 09"} (1950)
GRB_ERROR:       1.17 [deg radius, statistical only]
DATA_SIGNIF:     54.40 [sigma]
DATA_INTERVAL:   15.360 [sec]
GRB_DATE:        19619 TJD;    40 DOY;   22/02/09
GRB_TIME:        82850.42 SOD {23:00:50.42} UT
GRB_PHI:          34.00 [deg]
GRB_THETA:        62.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       323.57d {+21h 34m 16s}  -14.44d {-14d 26' 13"}
SUN_DIST:         88.96 [deg]   Sun_angle= -2.2 [hr] (East of Sun)
MOON_POSTN:       64.21d {+04h 16m 51s}  +22.03d {+22d 01' 48"}
MOON_DIST:        62.33 [deg]
MOON_ILLUM:      63 [%]
GAL_COORDS:      117.59,  9.52 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       48.70, 61.64 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_lc_medres34_bn220209959.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_666140455.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(7.0<100sec) coincident with the CALET_GBM event (trignum=1328482817).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 09 Feb 22 23:10:07 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     666140455
GRB_RA:          352.270d {+23h 29m 05s} (J2000),
                 352.503d {+23h 30m 01s} (current),
                 351.748d {+23h 26m 59s} (1950)
GRB_DEC:         +72.020d {+72d 01' 12"} (J2000),
                 +72.142d {+72d 08' 31"} (current),
                 +71.744d {+71d 44' 39"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
GRB_DATE:        19619 TJD;    40 DOY;   22/02/09
GRB_TIME:        82850.42 SOD {23:00:50.42} UT
GRB_PHI:          33.00 [deg]
GRB_THETA:        62.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       323.57d {+21h 34m 17s}  -14.44d {-14d 26' 07"}
SUN_DIST:         88.70 [deg]   Sun_angle= -1.9 [hr] (East of Sun)
MOON_POSTN:       64.28d {+04h 17m 06s}  +22.05d {+22d 02' 43"}
MOON_DIST:        63.50 [deg]
MOON_ILLUM:      63 [%]
GAL_COORDS:      116.60, 10.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       48.05, 62.77 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_lc_medres34_bn220209959.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_locplot_all_bn220209959.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(7.0<100sec) coincident with the CALET_GBM event (trignum=1328482817).

GCN Circular #31561
The Fermi GBM team reports the detection of a likely LONG GRB
At 23:00:50 UT on 9 Feb 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220209A (trigger 666140455.423452 / 220209959).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 352.3, Dec = 72.0 (J2000 degrees, equivalent to J2000 23h 29m, 72d 00'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 62.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_skymap_all_bn220209959.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/bn220209959/quicklook/glg_healpix_all_bn220209959.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220209959/quicklook/glg_lc_medres34_bn220209959.gif
GCN Circular #31562
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),
B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez, M.L.H.Rodriguez (INAOE, OAGH)
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational State University)
MASTER-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 220209A ( Fermi GBM team, GCN 31561) errorbox 28670 sec after notice time and 28704 sec after trigger time at 2022-02-10 06:59:14 UT, with upper limit up to 13.9 mag. Observations started at twilight. The observations began at zenith distance = 75 deg. The sun altitude is -10.6 deg.
MASTER-Amur robotic telescope located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 220209A errorbox 38592 sec after notice time and 38625 sec after trigger time at 2022-02-10 09:44:35 UT, with upper limit up to 14.6 mag. Observations started at twilight. The observations began at zenith distance = 37 deg. The sun altitude is -10.9 deg.
The galactic latitude b = 10 deg., longitude l = 117 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1876477
We obtain a following upper limits.
```
Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   28734 | 2022-02-10 06:59:14 |          MASTER-IAC | (23h 47m 25.56s , +69d 30m 47.3s) |   C |    60 | 13.9 |        
   38656 | 2022-02-10 09:44:35 |         MASTER-Amur | (23h 01m 26.56s , +71d 09m 13.9s) |   C |    60 | 14.3 |        
   38735 | 2022-02-10 09:45:55 |         MASTER-Amur | (23h 26m 44.90s , +71d 10m 06.6s) |   C |    60 | 14.6 |        
   38815 | 2022-02-10 09:47:15 |         MASTER-Amur | (23h 49m 22.42s , +71d 09m 55.0s) |   C |    60 | 14.6 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
GCN Circular #31563
A. Ursi (INAF/IAPS), A. Di Piano (INAF/OAS-Bologna), 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), F. Lucarelli (SSDC, and INAF/OAR), 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), A. Giuliani (INAF/IASF-Mi), F. Longo (Univ. Trieste and INFN Trieste), and P. Tempesta (TeleSpazio), report on behalf of the AGILE Team:
The AGILE satellite detected the long GRB 220209A at T0 = 2022-02-09 23:00:58.72 +/- 0.01 s (UTC), reported by Fermi GBM (GCN #31561).
The burst is clearly visible in the AGILE scientific ratemeters of the SuperAGILE (SA; 20-60 keV), MiniCALorimeter (MCAL; 0.4-100 MeV), and AntiCoincidence (AC; 50-200 keV) detectors. The event lasted T90 = 14.5 +/- 0.5 s (in the 0.4-100 MeV energy range) and it released a total number of 2230 counts in the SA detector (above a background rate of 80 Hz), 25480 counts in the MCAL detector (above a background rate of 1110 Hz), and 48110 counts in the AC detector (above a background rate of 3015 Hz). The AGILE ratemeters light curves can be found at http://www.agilescienceapp.it/notices/GRB220209A_AGILE_RM.png .
The event also triggered a high time resolution MCAL data acquisition, and released 13500 counts in the detector, above a background rate of 525 Hz. The time-integrated spectrum of the burst, from T0-2 s to T0+13 s, can be fitted in the energy range 0.4-10 MeV with a Band model with alpha = -0.29 (-0.15/+0.11), beta = -2.50 (-0.23,+0.25), and Ep = 2.06 (-1.94,+2.38) MeV, resulting in a reduced chi-squared of 1.42 (46 d.o.f.) and a fluence of 4.45e-05 erg/cm^2 (90% confidence level), in the same energy range. The MCAL light curve can be found at http://www.agilescienceapp.it/notices/076934_GRB_571532458.721385.png and the best-fit spectrum can be found at http://www.agilescienceapp.it/notices/GRB220209A_MCALsp.png . At the T0, the event was 12 deg off-axis.
At T0+192 s, we notice another bursting episode, possibly related to GRB 220209A, and also visible in the Fermi GBM public light curves. This episode lasted about 30 s and released a total number of 3610 counts in the SA detector (above a background rate of 140 Hz), 38820 counts in the MCAL detector (above a background rate of 1135 Hz), and 108520 counts in the AC detector (above a background rate of 4160 Hz). This episode also triggered a second partial high time resolution MCAL data acquisition, and released 6875 counts in the detector, above a background rate of 535 Hz. Assuming that this event belongs to GRB 220209A, the time-integrated spectrum from T0+187 s to T0+197 s can be fitted in the energy range 0.4-5 MeV with a power-law with ph.ind. = -2.62 (-0.17,+0.19), resulting in a reduced chi-squared of 1.33 (36 d.o.f.) and a fluence of 1.38e-05 erg/cm^2 (90% confidence level), in the same energy range. At T0+192 s, the event was 140 deg 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 #31564
Y. Q. Zhang, S. L. Xiong, C. Cai, S. Xiao, P. Zhang, C. Y. Li, S. L. Xie, X. Y. Zhao, Y. Huang, X. Y. Song, J. C. Liu, Y. Zhao, Z. W. Guo, C. Zheng, W. C. Xue, C. W. Wang, Q. B. Yi, B. X. Zhang, W. X. Peng, R. Qiao, D. Y. Guo, X. B. Li, X. Ma, L. M. Song, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, J. J. He, G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang, H. M. Zhang, Z. H. An, M. Gao, K. Gong, B. Li, C. Li, J. H. Li, X. Q. Li, Y. G. Li, X. H. Liang, X. J. Liu, Y. Q. Liu, X. L. Sun, Y. L. Tuo, J. Z. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang, X. Zhou, F. J. Lu, S. N. Zhang (IHEP) report on behalf of GECAM team:
During the commissioning phase, GECAM-B was triggered in-flight by a long burst, GRB 220209A, at 2022-02-09T23:00:59.200 UTC (denoted as T0), which was also observed by Fermi/GBM (GCN #31561) and AGILE/MCAL (GCN #31563).
GECAM alert data was downlinked to the ground through the short message service of BeiDou Navigation Satellite System (BDS) within ~60 s after T0.
According to the BDS alert data, this burst mainly consists of a broad pulse with a duration of about 30 s.
The GECAM light curve could be found here: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/multiLCvsE_2022-02-09T23_00_59.150.png
Using the automatic on-ground localization pipeline with the BDS alert data, GECAM-B localized this burst to the following position (J2000): Ra: 355.5 deg Dec: 65.3 deg Err: 3.9 deg (1-sigma, statistical only) The current systematic error of location is estimated to be several degrees which could be minimized by the ongoing calibration.
GECAM location is consistent with the Fermi/GBM position within the error.
Given that the location is consistent with the Galactic plane, we cannot rule out the galactic origin of this burst.
Please note that all GECAM results here are preliminary. The final analysis will be published in journal papers or GECAM online catalog.
Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time), which was funded by the Chinese Academy of Sciences (CAS).
GCN Circular #31565
S. Lesage (UAH) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:
"At 23:00:50 UT on 09 February 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220209A (trigger 666140455/220209959) which was also detected by AGILE (A. Ursi, et al. 2022, GCN 31563) and GECAM (Y. Q. Zhang, et al. 2022, GCN 31564). The Fermi GBM Final Real-time Localization (GCN 31561) is consistent with the GECAM position.
The GBM light curve shows two bright emission episodes with a duration (T90) of about 201 s (10-1000 keV).
The time-averaged spectrum for the first emission episode from T0+7.2 to T0+51.2 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.92 +/- 0.02 and the cutoff energy, parameterized as Epeak, is 1097 +/- 118 keV. The event fluence (10-1000 keV) in this time interval is (3.48 +/- 0.05)E-05 erg/cm^2.
The time-averaged spectrum for the second emission episode from T0+159.7 to T0+220.2 s is also best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.95 +/- 0.02 and the cutoff energy, parameterized as Epeak, is 307 +/- 12 keV. The event fluence (10-1000 keV) in this time interval is (2.6 +/- 0.04)E-05 erg/cm^2.
The 1-sec peak photon flux measured starting from T0+198.3 s in the 10-1000 keV band is 17.8 +/- 0.4 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog:https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
For Fermi GBM data and info, please visit the official Fermi GBM Support Page:https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
GCN Circular #31577
M. Pesce-Rollins (INFN Pisa), D. Horan (CNRS/IN2P3/LLR), F. Piron (CNRS/IN2P3/LUPM), M. Axelsson (KTH & Stockholm Univ.), F. Longo (University and INFN, Trieste), and N. Di Lalla (Stanford) report on behalf of the Fermi-LAT Collaboration:
On February 9th, 2022, Fermi-LAT detected high-energy emission from GRB 220209A, which was also detected by Fermi-GBM (GCN 31561), GECAM (GCN 31564) and AGILE (GCN 31565).
The best LAT on-ground location is found to be
RA, Dec = 352.13, 73.11 (degrees, J2000)
with an error radius of 1.4 deg (90% containment, statistical error only).
This was 68 deg from the LAT boresight at the time of the GBM trigger:
T0 = 23:00:50 UT.
The data from the Fermi-LAT show a significant increase in the event rate about 10 s after the GBM trigger that is temporally correlated with the GBM emission with high significance. The GRB has a very soft estimated photon index (above 50 MeV) of -4.7 +/- 0.7 in the time interval 0 - 20 s after the GBM trigger. The corresponding estimated photon flux above 50 MeV is 1.1E-4 +/- 5.1E-5 ph/cm2/s. The highest-energy photon is a 200 MeV event which is observed 13 seconds after the GBM trigger.
The Fermi-LAT point of contact for this burst is Niccolo' di Lalla (niccolo.dilalla@stanford.edu).
The Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.
GCN Circular #31598
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the MGNS/BepiColombo team,
J. Benkhoff on behalf of the BepiColombo 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,
A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB 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 220209A (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 31561; Lesage eat al., GCN Circ. 31565; AGILE-MCAL detection: Ursi et al., GCN Circ. 31563; GECAM detection: Zhang et al., GCN Circ. 31564; Fermi-LAT detection: Pesce-Rollins et al., GCN Circ. 31577) was detected by Fermi (GBM trigger 666140455), GECAM-B, AGILE (MCAL), Konus-Wind, INTEGRAL (SPI-ACS), and BepiColombo (MGNS) at about 82850 s UT (23:00:50).
We have triangulated it to a preliminary, 3 sigma error box whose coordinates are:
```
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   351.998 (23h 28m 00s) +69.556 (+69d 33' 22")
  Corners:
    19.772 (01h 19m 05s) +60.497 (+60d 29' 49")
    18.826 (01h 15m 18s) +61.426 (+61d 25' 34")
   310.634 (20h 42m 32s) +70.589 (+70d 35' 21")
   313.447 (20h 53m 47s) +70.575 (+70d 34' 31")
  ---------------------------------------------
```
The error box area is 7.1 sq. deg, and its maximum dimension is 28.4 deg (the minimum one is 15.5 arcmin). The Sun distance was 85 deg.
This box may be improved.
The IPN localization is consistent with, but reduces the area of, the Fermi-GBM final position (GCN Circ. 31561) and the BALROG position (https://grb.mpe.mpg.de/grb/GRB220209959/) localizations.
The distance between the center of the Fermi (LAT) position (GCN 31577) and the IPN error box is 3.3 deg.
A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB220209_T82859/IPN/
The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.
GCN Circular #31604
D. Svinkin, D. Frederiks, M. Ulanov, A. Tsvetkova, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, report:
The long-duration GRB 220209A (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 31561; Lesage eat al., GCN Circ. 31565; AGILE-MCAL detection: Ursi et al., GCN Circ. 31563; GECAM detection: Zhang et al., GCN Circ. 31564; Fermi-LAT detection: Pesce-Rollins et al., GCN Circ. 31577; IPN triangulation: Kozyrev et al., GCN Circ. 31598) triggered Konus-Wind at T0=82859.23 s UT (23:00:59.230).
The burst light curve shows two emission episodes. The first one, lasting from ~T0-12 s to ~T0+98 s, and the second episode, from ~T0+147 s to ~T0+260 s. The total burst duration was ~272 s. The emission is seen up to ~10 MeV.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB220209_T82859/
As observed by Konus-Wind, the burst had a fluence of 1.86(-0.32,+0.42)x10^-4 erg/cm2, and a 64-ms peak flux, measured from T0+1.312 s, of 1.12(-0.28,+0.29)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
The time-averaged spectrum of the burst (measured from T0 to T0+218.624 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.83(-0.19,+0.60), the high energy photon index beta = -1.81(-0.21,+0.16), the peak energy Ep = 320(-162,+162) keV (chi2 = 101/86 dof).
The spectrum near the maximum count rate (measured from T0 to T0+7.936 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.89(-0.05,+0.06), the high energy photon index beta = -3.17(-6.83,+0.89), the peak energy Ep = 1675(-288,+289) keV (chi2 = 96/86 dof).
All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.

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Jochen Greiner, last update: 18-Feb-2022 [Disclaimer]