- GCN NOTICE
TITLE: GCN/FERMI NOTICE
NOTICE_DATE: Fri 09 Dec 22 05:51:04 UT
NOTICE_TYPE: Fermi-GBM Flight Position
RECORD_NUM: 58
TRIGGER_NUM: 692257829
GRB_RA: 11.117d {+00h 44m 28s} (J2000),
11.472d {+00h 45m 53s} (current),
10.350d {+00h 41m 24s} (1950)
GRB_DEC: +67.767d {+67d 46' 00"} (J2000),
+67.892d {+67d 53' 31"} (current),
+67.493d {+67d 29' 35"} (1950)
GRB_ERROR: 3.55 [deg radius, statistical plus systematic]
GRB_INTEN: 3412 [cnts/sec]
DATA_SIGNIF: 227.40 [sigma]
INTEG_TIME: 2.048 [sec]
GRB_DATE: 19922 TJD; 343 DOY; 22/12/09
GRB_TIME: 21024.85 SOD {05:50:24.85} UT
GRB_PHI: 60.00 [deg]
GRB_THETA: 155.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO: 0.39
LOC_ALGORITHM: 3 (version number of)
MOST_LIKELY: 95% GRB
2nd_MOST_LIKELY: 3% Generic Transient
DETECTORS: 0,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN: 256.01d {+17h 04m 03s} -22.81d {-22d 48' 45"}
SUN_DIST: 120.55 [deg] Sun_angle= -7.7 [hr] (East of Sun)
MOON_POSTN: 88.86d {+05h 55m 27s} +27.21d {+27d 12' 25"}
MOON_DIST: 60.22 [deg]
MOON_ILLUM: 99 [%]
GAL_COORDS: 122.27, 4.90 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 49.53, 55.11 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221209243/quicklook/glg_lc_medres34_bn221209243.gif
COMMENTS: Fermi-GBM Flight-calculated Coordinates.
COMMENTS: This trigger occurred at longitude,latitude = 70.97,-0.88 [deg].
COMMENTS: The LC_URL file will not be created until ~15 min after the trigger.
- GCN NOTICE
TITLE: GCN/FERMI NOTICE
NOTICE_DATE: Fri 09 Dec 22 05:50:54 UT
NOTICE_TYPE: Fermi-GBM Flight Position
RECORD_NUM: 47
TRIGGER_NUM: 692257829
GRB_RA: 10.967d {+00h 43m 52s} (J2000),
11.321d {+00h 45m 17s} (current),
10.202d {+00h 40m 49s} (1950)
GRB_DEC: +67.717d {+67d 43' 00"} (J2000),
+67.842d {+67d 50' 31"} (current),
+67.443d {+67d 26' 35"} (1950)
GRB_ERROR: 3.50 [deg radius, statistical plus systematic]
GRB_INTEN: 3872 [cnts/sec]
DATA_SIGNIF: 101.30 [sigma]
INTEG_TIME: 0.256 [sec]
GRB_DATE: 19922 TJD; 343 DOY; 22/12/09
GRB_TIME: 21024.85 SOD {05:50:24.85} UT
GRB_PHI: 60.00 [deg]
GRB_THETA: 155.00 [deg]
DATA_TIME_SCALE: 0.2560 [sec]
HARD_RATIO: 0.29
LOC_ALGORITHM: 3 (version number of)
MOST_LIKELY: 97% GRB
2nd_MOST_LIKELY: 1% Generic Transient
DETECTORS: 0,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN: 256.01d {+17h 04m 03s} -22.81d {-22d 48' 45"}
SUN_DIST: 120.51 [deg] Sun_angle= -7.7 [hr] (East of Sun)
MOON_POSTN: 88.86d {+05h 55m 27s} +27.21d {+27d 12' 25"}
MOON_DIST: 60.28 [deg]
MOON_ILLUM: 99 [%]
GAL_COORDS: 122.21, 4.86 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 49.40, 55.11 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221209243/quicklook/glg_lc_medres34_bn221209243.gif
COMMENTS: Fermi-GBM Flight-calculated Coordinates.
COMMENTS: This trigger occurred at longitude,latitude = 70.97,-0.88 [deg].
COMMENTS: The LC_URL file will not be created until ~15 min after the trigger.
- GCN NOTICE
TITLE: GCN/FERMI NOTICE
NOTICE_DATE: Fri 09 Dec 22 05:51:13 UT
NOTICE_TYPE: Fermi-GBM Ground Position
RECORD_NUM: 57
TRIGGER_NUM: 692257829
GRB_RA: 240.290d {+16h 01m 10s} (J2000),
240.459d {+16h 01m 50s} (current),
239.922d {+15h 59m 41s} (1950)
GRB_DEC: +48.450d {+48d 27' 00"} (J2000),
+48.387d {+48d 23' 13"} (current),
+48.589d {+48d 35' 20"} (1950)
GRB_ERROR: 1.58 [deg radius, statistical only]
DATA_SIGNIF: 321.40 [sigma]
DATA_INTERVAL: 2.048 [sec]
GRB_DATE: 19922 TJD; 343 DOY; 22/12/09
GRB_TIME: 21024.85 SOD {05:50:24.85} UT
GRB_PHI: 56.00 [deg]
GRB_THETA: 97.00 [deg]
E_RANGE: 44.032 - 279.965 [keV]
LOC_ALGORITHM: 4173 (Gnd S/W Version number)
SUN_POSTN: 256.01d {+17h 04m 03s} -22.81d {-22d 48' 45"}
SUN_DIST: 72.55 [deg] Sun_angle= 1.0 [hr] (West of Sun)
MOON_POSTN: 88.86d {+05h 55m 27s} +27.21d {+27d 12' 26"}
MOON_DIST: 100.23 [deg]
MOON_ILLUM: 99 [%]
GAL_COORDS: 76.30, 47.78 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 215.08, 66.32 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221209243/quicklook/glg_lc_medres34_bn221209243.gif
POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_692257829.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: Fri 09 Dec 22 05:59:48 UT
NOTICE_TYPE: Fermi-GBM Final Position
RECORD_NUM: 0
TRIGGER_NUM: 692257829
GRB_RA: 241.680d {+16h 06m 43s} (J2000),
241.849d {+16h 07m 24s} (current),
241.313d {+16h 05m 15s} (1950)
GRB_DEC: +48.080d {+48d 04' 48"} (J2000),
+48.020d {+48d 01' 11"} (current),
+48.213d {+48d 12' 46"} (1950)
GRB_ERROR: 1.00 [deg radius, statistical only]
GRB_DATE: 19922 TJD; 343 DOY; 22/12/09
GRB_TIME: 21024.85 SOD {05:50:24.85} UT
GRB_PHI: 55.00 [deg]
GRB_THETA: 97.00 [deg]
E_RANGE: 44.032 - 279.965 [keV]
LOC_ALGORITHM: 41731 (Gnd S/W Version number)
SUN_POSTN: 256.02d {+17h 04m 05s} -22.81d {-22d 48' 47"}
SUN_DIST: 71.97 [deg] Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN: 88.94d {+05h 55m 47s} +27.21d {+27d 12' 43"}
MOON_DIST: 100.93 [deg]
MOON_ILLUM: 99 [%]
GAL_COORDS: 75.49, 46.95 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 217.55, 66.44 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221209243/quicklook/glg_lc_medres34_bn221209243.gif
LOC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221209243/quicklook/glg_locplot_all_bn221209243.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.
- GCN Circular #33031
The Fermi GBM team reports the detection of a likely LONG GRB
At 05:50:24 UT on 9 Dec 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221209A (trigger 692257829.852778 / 221209243).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 241.7, Dec = 48.1 (J2000 degrees, equivalent to J2000 16h 06m, 48d 06'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 97.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221209243/quicklook/glg_skymap_all_bn221209243.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/bn221209243/quicklook/glg_healpix_all_bn221209243.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221209243/quicklook/glg_lc_medres34_bn221209243.gif
- GCN Circular #33032
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
692257829 at 05:50:24 on 09 Dec. 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) = 234.9+/-0.9 deg
Decl.(2000.0) = 48.7+/-0.6 deg
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB221209243/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB221209243/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB221209243/json
- GCN Circular #33034
E. Bissaldi (Politecnico and INFN Bari)
reports on behalf of the Fermi GBM Team:
"At 05:50:24.85 UT on 9 December 2022,
the Fermi Gamma-Ray Burst Monitor (GBM)
triggered and located GRB 221209A
(trigger 692257829 / 221209243).
The Fermi GBM Final Real-time Localization
is reported in GCN 33031.
The angle from the Fermi LAT boresight
at the GBM trigger time is 97 degrees.
The GBM light curve consists of a single
bright emission episode with a duration (T90)
of about 4 s (50-300 keV).
The time-averaged spectrum from T0 to T0+7 s is
best fit by a Band function with
Epeak = 325 +/- 12 keV, alpha = -0.62 +/- 0.02,
and beta = -2.08 +/- 0.03.
The event fluence (10-1000 keV) in this
time interval is (3.35 +/- 0.03)E-05 erg/cm^2.
The 1-sec peak photon flux measured starting
from T0+1.2 in the 10-1000 keV band
is 67.1 +/- 0.6 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 #33037
R. Gopalakrishnan (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V.
Bhalerao (IITB), D. Bhattacharya (Ashoka University/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 ML pipeline (Abraham et al.,
2021, MNRAS, 504, 3084) and the CIFT framework (Sharma et al., 2021,
JApA, 42, 73) showed the detection of a bright GRB 221209A which was
also detected by Fermi-GBM (Fermi GBM team, GCN Circ. 33031) and BALROG
(Kunzweiler et al., GCN Circ. 33032).
The source was clearly detected in the 20-200 keV energy range. The
light curve peaks at 2022-12-09 05:50:26.45 UTC. The measured peak count
rate associated with the burst is 6052 (+437, -209) counts/s above the
background in the combined data of all quadrants, with a total of 9174
(+346, -285) counts. The local mean background count rate was 445 (+8,
-10) counts/s. Using cumulative rates, we measure a T90 of 2.7 (+0.2,
-0.1) s. In the preliminary analysis, we find 1078 Compton events
associated with this event.
It was also clearly detected in the CsI anticoincidence (Veto) detector
in the 100-500 keV energy range. The light curve peaks at 2022-12-09
05:50:26.18 UTC. The measured peak count rate is 5980 (+136, -150)
counts/s above the background in the combined Veto data of all
quadrants, with a total of 12635 (+713, -729) counts. The local mean
background count rate was 1402 (+8, -7) counts/s. We measure a T90 of
3.5 (+1.0, -0.6) 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. CZTI is built by a TIFR-led
consortium of institutes across India, including VSSC, URSC, IUCAA, SAC,
and PRL. The Indian Space Research Organisation funded, managed, and
facilitated the project.
- GCN Circular #33049
Y. Kawakubo (LSU), A. Yoshida, T. Sakamoto, S. Sugita (AGU),
K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), Y. Asaoka (ICRR),
S. Torii, Y. Akaike, K. Kobayashi (Waseda U),
Y. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC),
M. L. Cherry (LSU), S. Ricciarini (U of Florence),
P. S. Marrocchesi (U of Siena),
and the CALET collaboration:
The long GRB 221209A (Fermi GBM Final Real-time Localization:
Fermi GBM team, GCN Circ. 33031; BALROG localization:
Kunzweiler et al., GCN Circ 33032; Fermi GBM observation:
Bissaldi et al., GCN Circ 33034; AstroSat CZTI detection:
Gopalakrishnan et al., GCN Circ 33037) triggered the CALET Gamma-ray
Burst Monitor (CGBM) at 05:50:25.591 UTC on 9 December 2022
(http://cgbm.calet.jp/cgbm_trigger/flight/1354600238/index.html).
The burst signal was seen by all CGBM detectors.
No real-time CGBM GCN notice was distributed about this trigger because
the real-time communication from the ISS was off (loss of signal).
The burst light curve shows a single pulse that starts
at T-2.0 sec, peaks at T+0.9 sec, and ends at T+5.0 sec.
The T90 and T50 durations measured by the SGM data are 3.2 +/- 0.4 sec
and 1.3 +/- 0.1 sec (40-1000 keV), respectively.
The ground-processed light curve is available at
http://cgbm.calet.jp/cgbm_trigger/ground/1354600238/
The CALET data used in this analysis are provided by
the Waseda CALET Operation Center located at Waseda University.
- GCN Circular #33059
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, C. Wilson-Hodge,
and E. Burns on behalf of the Fermi GBM team,
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 bright, long-duration GRB 221209A
(Fermi-GBM detection: the Fermi GBM team, GCN Circ. 33031;
Bissaldi, GCN Circ. et al., GCN Circ. 33034;
BALROG localization: Kunzweiler et al., GCN Circ. 33032;
AstroSat-CZTI detection: Gopalakrishnan et al., GCN Circ. 33037;
CALET-CGBM detection: Kawakubo et al., GCN Circ. 33049)
was detected by Fermi(GBM trigger 692257829), Konus-Wind,
INTEGRAL (SPI-ACS), AstroSat (CZTI), CALET (CGBM),
and Mars-Odyssey (HEND) at about 21024 s UT (05:50:24).
We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
---------------------------------------------
RA(2000), deg Dec(2000), deg
---------------------------------------------
Center:
231.643 (15h 26m 34s) +49.850 (+49d 50' 59")
Corners:
230.092 (15h 20m 22s) +49.310 (+49d 18' 36")
230.747 (15h 22m 59s) +49.761 (+49d 45' 38")
233.222 (15h 32m 53s) +50.361 (+50d 21' 41")
232.541 (15h 30m 10s) +49.930 (+49d 55' 48")
---------------------------------------------
The error box area is 1573 sq. arcmin, and its maximum
dimension is 2.28 deg (the minimum one is 15.5 arcmin).
The Sun distance was 76 deg.
This box may be improved.
The IPN localization is consistent with, but reduces the area of,
the Fermi-GBM final localization (GCN 33034) and the BALROG localization
(33032).
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB221209_T21024/IPN/
The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.
- GCN Circular #33061
D. Frederiks, A.Lysenko, A. Ridnaia, D. Svinkin,
A. Tsvetkova, M. Ulanov, and T. Cline,
on behalf of the Konus-Wind team, report:
The long GRB 221209A (Fermi-GBM observation: Bissaldi, GCN 33034;
AstroSat CZTI detection: Gopalakrishnan et al., GCN Circ 33037;
IPN triangulation: Kozyrev et al., GCN 33059)
triggered Konus-Wind (KW) at T0=21024.993 s UT (05:50:24.993).
The burst light curve shows a bright, FRED-like pulse,
which starts at ~T0-0.5 s, peaks at ~T0-0.640 s,
and has a total duration of ~10 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/GRB221209_T21024/
As observed by Konus-Wind, the burst had
a fluence of (6.39 ± 0.43)x10^-5 erg/cm^2 and
a 64-ms peak energy flux, measured from T0 + 0.640 s,
of (4.89 ± 0.28)x10^-5 erg/cm^2/s (both in the 20 keV - 10 MeV energy range).
The time-integrated spectrum (measured from T0 to T0+12.302 s)
is best fit in the 20 keV - 15 MeV range
by a GRB (Band) function with the following model parameters:
the low-energy photon index alpha = -0.64 (-0.09,+0.10),
the high energy photon index beta = -2.05 (-0.08,+0.07),
the peak energy Ep = 306 (-32,+36) keV,
chi2 = 103/97 dof.
The spectrum near the peak count rate (measured from T0+0.256 to T0+1.280 s)
is best fit in the 20 keV - 15 MeV range
by a GRB (Band) function with the following model parameters:
the low-energy photon index alpha = -0.28 (-0.11,+0.12),
the high energy photon index beta = -1.97 (-0.07,+0.06),
the peak energy Ep = 366 (-39,+46) keV,
chi2 = 68/66 dof.
All the quoted errors are estimated at the 90% confidence level.
All the presented results are preliminary.
Previous IAU Circulars 
