| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB231224868 |
|
| T0 |
20:49:15 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
230.9290° |
GCN_circulars,IPN Triangulation |
| decl |
-83.5170° |
GCN_circulars,IPN Triangulation |
| T90 |
0.832 s |
Fermi_GBM |
| T90_error |
0.838 s |
Fermi_GBM |
| T90_start |
20:49:15.610 UTC |
Fermi_GBM |
| fluence |
2.37e-07 erg/cm² |
Fermi_GBM |
| fluence_error |
1.97e-08 erg/cm² |
Fermi_GBM |
| T100 |
1.442 s |
|
| GBM_located |
False |
|
| mjd |
60302.86753472222 |
GCN_circulars,Fermi GBM final loc |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB231224868 |
| trigger_name |
bn231224868 |
| ra |
102.2900° |
| decl |
-71.1700° |
| pos_error |
9.99e+00° |
| datum |
2023-12-24 |
| t_trigger |
20:49:15.994 UTC |
| T90 |
0.832 s |
| T90_error |
0.838 s |
| T90_start |
20:49:15.610 UTC |
| fluence |
2.37e-07 erg/cm² |
| fluence_error |
1.97e-08 erg/cm² |
| flux_1024 |
1.16e+00 erg/cm²/s |
| flux_1024_error |
1.69e-01 erg/cm²/s |
| flux_1024_time |
-5.12e-01 erg/cm²/s |
| flux_64 |
6.40e+00 erg/cm²/s |
| flux_64_error |
7.93e-01 erg/cm²/s |
| GCN 35426 table |
|---|
| GRB_name |
GRB231224A |
| GCN_number |
35426 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
20:49:15 UTC |
| ra |
102.3000° |
| decl |
-71.2000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 35426
SUBJECT: GRB 231224A: Fermi GBM Final Real-time Localization
DATE: 23/12/24 20:59:57 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely SHORT GRB
At 20:49:15 UT on 24 Dec 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231224A (trigger 725143760.994196 / 231224868).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 102.3, Dec = -71.2 (J2000 degrees, equivalent to J2000 06h 49m, -71d 12'), with a statistical uncertainty of 11.9 degrees.
The angle from the Fermi LAT boresight is 24.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231224868/quicklook/glg_skymap_all_bn231224868.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/bn231224868/quicklook/glg_healpix_all_bn231224868.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231224868/quicklook/glg_lc_medres34_bn231224868.gif
|
| GCN 35430 table |
|---|
| GRB_name |
GRB231224A |
| GCN_number |
35430 |
| Detection_method |
IPN Triangulation |
| t_trigger |
20:49:16 UTC |
| ra |
230.9290° |
| decl |
-83.5170° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 35430
SUBJECT: IPN triangulation of GRB 231224A (short)
DATE: 23/12/27 12:51:08 GMT
FROM: Dmitry Svinkin at Ioffe Institute
D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko,
on behalf of the IPN,
A. Goldstein, M. S. Briggs, C. Wilson-Hodge,
and E. Burns on behalf of the Fermi GBM team,
and
E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
report:
The short-duration GRB 231224A
(Fermi-GBM detection: The Fermi GBM team, GCN 35426)
was detected by Fermi (GBM trigger 725143760) and
INTEGRAL (SPI-ACS) at about 74956 s UT (20:49:16).
We have triangulated it to a GBM-SPI-ACS annulus centered at
RA(2000)=230.929 deg (15h 23m 43s) Dec(2000)=-83.517 deg (-83d 30' 60"),
whose radius is 32.644 +/- 5.664 deg (3 sigma).
The annulus combined with the Fermi-GBM final position (GCN 35426;
glg_healpix_all_bn231224868_v00) gives ~792 sq. deg (3 sigma) localization region.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB231224_T74955/IPN/ |