Gamma-ray Burst 230116B

(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:     Mon 16 Jan 23 08:59:35 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     695552351
GRB_RA:           97.317d {+06h 29m 16s} (J2000),
                  97.501d {+06h 30m 00s} (current),
                  96.918d {+06h 27m 40s} (1950)
GRB_DEC:         -41.183d {-41d 10' 59"} (J2000),
                 -41.200d {-41d 11' 58"} (current),
                 -41.149d {-41d 08' 55"} (1950)
GRB_ERROR:       3.40 [deg radius, statistical plus systematic]
GRB_INTEN:       5854 [cnts/sec]
DATA_SIGNIF:     58.20 [sigma]
INTEG_TIME:      0.064 [sec]
GRB_DATE:        19960 TJD;    16 DOY;   23/01/16
GRB_TIME:        32346.67 SOD {08:59:06.67} UT
GRB_PHI:         115.00 [deg]
GRB_THETA:        90.00 [deg]
DATA_TIME_SCALE: 0.0640 [sec]
HARD_RATIO:      0.11
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      98%  GRB
2nd_MOST_LIKELY:   1%  Generic SGR
DETECTORS:       1,1,1, 0,0,0, 0,0,1, 1,1,1, 0,0,
SUN_POSTN:       297.95d {+19h 51m 48s}  -20.95d {-20d 57' 08"}
SUN_DIST:        115.01 [deg]   Sun_angle= -10.6 [hr] (East of Sun)
MOON_POSTN:      218.94d {+14h 35m 45s}  -15.51d {-15d 30' 23"}
MOON_DIST:       101.66 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      249.36,-21.40 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      102.77,-64.30 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230116374/quicklook/glg_lc_medres34_bn230116374.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 116.98,-14.73 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 16 Jan 23 08:59:55 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     695552351
GRB_RA:          116.190d {+07h 44m 46s} (J2000),
                 116.383d {+07h 45m 32s} (current),
                 115.771d {+07h 43m 05s} (1950)
GRB_DEC:         -41.530d {-41d 31' 47"} (J2000),
                 -41.587d {-41d 35' 12"} (current),
                 -41.408d {-41d 24' 28"} (1950)
GRB_ERROR:       2.27 [deg radius, statistical only]
DATA_SIGNIF:     78.90 [sigma]
DATA_INTERVAL:   0.064 [sec]
GRB_DATE:        19960 TJD;    16 DOY;   23/01/16
GRB_TIME:        32346.67 SOD {08:59:06.67} UT
GRB_PHI:         117.00 [deg]
GRB_THETA:       104.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       297.95d {+19h 51m 48s}  -20.95d {-20d 57' 07"}
SUN_DIST:        117.44 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      218.94d {+14h 35m 46s}  -15.51d {-15d 30' 27"}
MOON_DIST:        88.81 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      255.49, -8.55 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      133.14,-61.11 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230116374/quicklook/glg_lc_medres34_bn230116374.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_695552351.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(0.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=10161).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 16 Jan 23 09:08:35 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     695552351
GRB_RA:          113.620d {+07h 34m 29s} (J2000),
                 113.815d {+07h 35m 16s} (current),
                 113.197d {+07h 32m 47s} (1950)
GRB_DEC:         -40.410d {-40d 24' 35"} (J2000),
                 -40.462d {-40d 27' 41"} (current),
                 -40.299d {-40d 17' 57"} (1950)
GRB_ERROR:       2.09 [deg radius, statistical only]
GRB_DATE:        19960 TJD;    16 DOY;   23/01/16
GRB_TIME:        32346.67 SOD {08:59:06.67} UT
GRB_PHI:         118.00 [deg]
GRB_THETA:       102.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       297.96d {+19h 51m 50s}  -20.95d {-20d 57' 03"}
SUN_DIST:        118.47 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:      219.02d {+14h 36m 05s}  -15.54d {-15d 32' 22"}
MOON_DIST:        91.05 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      253.56, -9.73 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      128.60,-60.72 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230116374/quicklook/glg_lc_medres34_bn230116374.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230116374/quicklook/glg_locplot_all_bn230116374.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 Short GRB.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(0.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=10161).

GCN Circular #33172
The Fermi GBM team reports the detection of a likely SHORT GRB
At 08:59:06 UT on 16 Jan 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230116B (trigger 695552351.674084 / 230116374).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 113.6, Dec = -40.4 (J2000 degrees, equivalent to J2000 07h 34m, -40d 23'), with a statistical uncertainty of 2.1 degrees.
The angle from the Fermi LAT boresight is 102.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230116374/quicklook/glg_skymap_all_bn230116374.png
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230116374/quicklook/glg_healpix_all_bn230116374.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230116374/quicklook/glg_lc_medres34_bn230116374.gif
GCN Circular #33200
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, short-duration GRB 230116B (Fermi-GBM detection: the Fermi GBM team, GCN Circ. 33172) has been detected by Fermi(GBM trigger 695552351), Konus-Wind, INTEGRAL (SPI-ACS), and Mars-Odyssey (HEND), so far, at about 32347 s UT (08:59:07).
We have triangulated it to a preliminary, 3 sigma error box whose coordinates are:
```
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   115.533 (07h 42m 08s) -43.027 (-43d 01' 39")
  Corners:
   115.712 (07h 42m 51s) -42.983 (-42d 58' 59")
   115.582 (07h 42m 20s) -43.076 (-43d 04' 34")
   115.353 (07h 41m 25s) -43.071 (-43d 04' 17")
   115.483 (07h 41m 56s) -42.979 (-42d 58' 44")
  ---------------------------------------------
```
The error box area is 58 sq. arcmin, and its maximum dimension is 17 arcmin (the minimum one is 5.8 arcmin). The Sun distance was 116 deg.
This box may be improved.
The IPN localization is consistent with, but reduces the area of, the Fermi-GBM final localization (GCN 33172).
A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB230116_T32349/IPN
The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.
GCN Circular #33203
R. Hamburg (CNRS/IJCLab) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
"At 08:59:06.67 UT on 16 January 2023, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 230116B (trigger 695552351 / 230116374), which was also localized by the IPN network (Kozyrev et al. 2023, GCN 33200). The GBM on-ground location is consistent with the IPN position.
The angle from the Fermi LAT boresight at the GBM trigger time is 104 degrees.
The GBM light curve consists of a single pulse with a duration (T90) of about 64 ms (50-300 keV). The time-averaged spectrum from T0-0.064 s to T0+0.128 is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.07 +/- 0.09 and the cutoff energy, parameterized as Epeak, is 733 +/- 53 keV.
The event fluence (10-1000 keV) in this time interval is (3.7 +/- 0.1)E-06 erg/cm^2. The 64-ms peak photon flux measured starting from T0+0.0 s in the 10-1000 keV band is 75.5 +/- 3.0 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/"

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Jochen Greiner, last update: 21-Jan-2023 [Disclaimer]