| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
22:09:01 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
194.6000° |
GCN_circulars,Fermi GBM final loc |
| decl |
-60.9000° |
GCN_circulars,Fermi GBM final loc |
| GBM_located |
True |
|
| mjd |
60726.92292824074 |
GCN_circulars,Fermi GBM final loc |
| GCN 39389 table |
|---|
| GRB_name |
GRB250220A |
| GCN_number |
39389 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
22:09:01 UTC |
| ra |
194.6000° |
| decl |
-60.9000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 39389
SUBJECT: GRB 250220A: Fermi GBM Final Real-time Localization
DATE: 25/02/20 22:19:28 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 22:09:01 UT on 20 Feb 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250220A (trigger 761782146.820828 / 250220923).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 194.6, Dec = -60.9 (J2000 degrees, equivalent to J2000 12h 58m, -60d 53'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 171.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250220923/quicklook/glg_skymap_all_bn250220923.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250220923/quicklook/glg_healpix_all_bn250220923.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250220923/quicklook/glg_lc_medres34_bn250220923.gif
|