| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB240226236 |
|
| T0 |
5:40:00.228 UTC |
Fermi_GBM |
| ra |
342.0800° |
Fermi_GBM |
| decl |
-24.6400° |
Fermi_GBM |
| pos_error |
9.54e+00° |
Fermi_GBM |
| T90 |
20.224 s |
Fermi_GBM |
| T90_error |
2.985 s |
Fermi_GBM |
| T90_start |
5:40:00.228 UTC |
Fermi_GBM |
| fluence |
9.33e-07 erg/cm² |
Fermi_GBM |
| fluence_error |
4.50e-08 erg/cm² |
Fermi_GBM |
| T100 |
20.224 s |
|
| GBM_located |
True |
|
| mjd |
60366.23611375 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB240226236 |
| trigger_name |
bn240226236 |
| ra |
342.0800° |
| decl |
-24.6400° |
| pos_error |
9.54e+00° |
| datum |
2024-02-26 |
| t_trigger |
5:40:04.580 UTC |
| T90 |
20.224 s |
| T90_error |
2.985 s |
| T90_start |
5:40:00.228 UTC |
| fluence |
9.33e-07 erg/cm² |
| fluence_error |
4.50e-08 erg/cm² |
| flux_1024 |
2.09e+00 erg/cm²/s |
| flux_1024_error |
2.23e-01 erg/cm²/s |
| flux_1024_time |
1.36e+01 erg/cm²/s |
| flux_64 |
4.89e+00 erg/cm²/s |
| flux_64_error |
1.31e+00 erg/cm²/s |
| GCN 35809 table |
|---|
| GRB_name |
GRB240226B |
| GCN_number |
35809 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
5:40:04 UTC |
| ra |
353.7000° |
| decl |
-24.4000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 35809
SUBJECT: GRB 240226B: Fermi GBM Final Real-time Localization
DATE: 24/02/26 21:41:00 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 05:40:04 UT on 26 Feb 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240226B (trigger 730618809.579832 / 240226236).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 353.7, Dec = -24.4 (J2000 degrees, equivalent to J2000 23h 34m, -24d 23'), with a statistical uncertainty of 5.4 degrees.
The angle from the Fermi LAT boresight is 100.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240226236/quicklook/glg_skymap_all_bn240226236.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240226236/quicklook/glg_healpix_all_bn240226236.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240226236/quicklook/glg_lc_medres34_bn240226236.gif
|
| GCN 35813 table |
|---|
| GRB_name |
GRB240226B |
| GCN_number |
35813 |
| Detection_method |
Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 35813
SUBJECT: Fermi Gamma-ray Burst Monitor trigger 730618809/240226236 is not a GRB
DATE: 24/02/27 00:17:45 GMT
FROM: Lorenzo Scotton at UAH
L. Scotton (UAH) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:
"The Fermi Gamma-ray Burst Monitor (GBM) trigger 730618809/240226236 at 05:40:04.58 UT
on 26 February 2024 was initially classified as a GRB, and named GRB 240226B (GCN 35809).
This trigger is in fact not due to a GRB, but to a solar flare." |