GRB 250221A
Time: 03:34:37
Trigger Number: 1290305
Burst Advocate: Regina Caputo
BAT Data:
| RA: a | 59.476 03:57:54.2 |
| Dec: a | -15.137 -15:08:13.2 |
| 90% Error Radius: b | 1.9 |
| T90: c | 1.80 |
| Fluence: d | 3.9 (0.6) |
| 1s Peak Photon Flux: e | 2.9 (0.5) |
| Photon Index: f | 1.43, PL (0.23) |
90% error in parentheses,
a J2000;
b arcmin;
c seconds;
d 10-7 erg/cm2 (15-150 keV);
e ph/cm2/sec (15-150 keV);
f PL = simple power-law, CPL = cutoff power-law (15-150 keV)
XRT Data:
| RA: a | 03:57:51.10 |
| Dec: a | -15:08:00.8 |
| 90% Error Radius: b | 2.5 |
| Time to First Observation: c | 122.92 |
| Early Flux: d | n/a |
| 11 Hour Flux: d | 0.020259921 |
| 24 Hour Flux: d | 0.008963856 |
| Initial Temporal Index: | -1.045 |
| Spectral Index (Gamma): | 2.084146215 |
| Column Density (NH): e | 3.258644826 |
Note: Please be aware that only the very basic temporal and spectral quantities are reported here. You are strongly encouraged to see the referenced GCN circulars for full details.
a J2000;
b arcsec;
c seconds;
d 10-11 erg/cm2/s (0.3-10 keV);
e 1021 cm-2
» XRT GRB Live Catalogue
» XRT Light Curves
» XRT Spectra
UVOT Data:
| RA: a | 03:57:51.06 |
| Dec: a | -15:07:59.2 |
| 90% Error Radius: b | 0.76 |
| Time to First Observation: c | 107 |
| V Magnitude: | V=17.10 |
| Other Filter Magnitudes: | B>18.7 U=17.78 UVW1>19.0 UVM2>18.6 UVW2>18.7 White=17.52 |
a J2000; b arcsec; c seconds
Other Burst Info:
Redshift:0.768 (VLT: emission)Host Galaxy:
Other Observatory Detections:
MASTER-OAFA, COLIBRÍ/DDRAGO, REM (60cm), Mephisto (1.6m), NOT, GRANDMA/TAROT, VLT, Assy AZT-20, Konus-Wind, Mondy AZT-33IK, LCO (1m), VLA @ 4 GHz, TNOT (80cm), ATCA @ 9 GHz
Comments:
References:
BAT: GCN 39396; GCN 39471
XRT: GCN 39396; GCN 39404; GCN 39414; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 39396; GCN 39409
Radio: GCN 39433 (VLA); GCN 39501 (ATCA)
Redshift: GCN 39418 (VLT)
Host:
Other: