| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
4:28:40 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
227.8000° |
GCN_circulars,Fermi GBM final loc |
| decl |
-18.6000° |
GCN_circulars,Fermi GBM final loc |
| GBM_located |
True |
|
| mjd |
59984.186574074076 |
GCN_circulars,Fermi GBM final loc |
| GCN 33306 table |
|---|
| GRB_name |
GRB230209A |
| GCN_number |
33306 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
4:28:40 UTC |
| ra |
227.8000° |
| decl |
-18.6000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 33306
SUBJECT: GRB 230209A: Fermi GBM Final Real-time Localization
DATE: 23/02/09 04:38:55 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 04:28:40 UT on 9 Feb 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230209A (trigger 697609725.271226 / 230209187).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 227.8, Dec = -18.6 (J2000 degrees, equivalent to J2000 15h 11m, -18d 36'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 1.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230209187/quicklook/glg_skymap_all_bn230209187.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/bn230209187/quicklook/glg_healpix_all_bn230209187.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230209187/quicklook/glg_lc_medres34_bn230209187.gif
|
| GCN 33308 table |
|---|
| GRB_name |
GRB230209A |
| GCN_number |
33308 |
| Detection_method |
Fermi GBM Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 33308
SUBJECT: GRB 230209A is not a GRB
DATE: 23/02/09 17:19:49 GMT
FROM: Joshua Wood at MSFC/Fermi-GBM
J. Wood (NASA/MSFC) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:
"The Fermi Gamma-ray Burst Monitor (GBM) trigger 697609725/230209187 at 04:28:40 UT
on 09 February 2023, tentatively classified as GRB 230209A (GCN 33306), is in fact not due
to a GRB. This trigger is likely due to local particles."
|