GRB 081221
Time: 16:21:11
Trigger Number: 337889
Burst Advocate: Erik Hoversten
BAT Data:
| RA: a | 15.801 01:03:12.2 |
| Dec: a | -24.542 -24:32:31.2 |
| 90% Error Radius: b | 1.0 |
| T90: c | 34 |
| Fluence: d | 181 (3) |
| 1s Peak Photon Flux: e | 18.2 (0.5) |
| Photon Index: f | 1.21, CPL (0.13) |
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)
BAT Light Curve:
XRT Data:
| RA: a | 01:03:10.25 |
| Dec: a | -24:32:53.3 |
| 90% Error Radius: b | 1.4 |
| Time to First Observation: c | 68.40 |
| Early Flux: d | 7360 |
| 11 Hour Flux: d | 0.1717238 |
| 24 Hour Flux: d | 0.06286634 |
| Initial Temporal Index: | -1.403 |
| Spectral Index (Gamma): | 2.4947 |
| Column Density (NH): e | 3.74385 |
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 | n/a |
| Dec: a | n/a |
| 90% Error Radius: b | n/a |
| Time to First Observation: c | 78 |
| V Magnitude: | V>20.74 |
| Other Filter Magnitudes: | B>21.55 U>21.69 UVW1>21.57 UVM2>21.55 UVW2>21.35 White>21.41 |
a J2000; b arcsec; c seconds
Other Burst Info:
Redshift:2.26 (Salvaterra)Host Galaxy:
B~25.4, I~24.5 (Keck I)Other Observatory Detections:
Gemini-North, Fermi (GBM), ESO/MPI (2.2m), VLA @ 8.46 GHz
Comments:
Note that this burst is coincident with a Fermi GBM burst (trigger 251569273)
UVOT: no detection
References:
BAT: GCN 8687; GCN 8708
XRT: GCN 8687; GCN 8690; GCN 8701; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 8687; GCN 8703
Radio: GCN 8748 (VLA)
Redshift: Salvaterra et al. 2012
Host: GCN 8711 (Keck I)
Other: