GRB 051221A
Time: 01:51:16
Trigger Number: 173780
Burst Advocate: Ann Parsons
BAT Data:
| RA: a | 328.715 21:54:51.6 |
| Dec: a | 16.888 16:53:16.8 |
| 90% Error Radius: b | 1.0 |
| T90: c | 1.400 |
| Fluence: d | 11.50 (0.35) |
| 1s Peak Photon Flux: e | 12.00 (0.39) |
| Photon Index: f | 1.39, PL (0.06) |
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 | 21:54:48.62 |
| Dec: a | 16:53:26.5 |
| 90% Error Radius: b | 1.4 |
| Time to First Observation: c | 88.00 |
| Early Flux: d | n/a |
| 11 Hour Flux: d | 0.078128 |
| 24 Hour Flux: d | 0.025704872 |
| Initial Temporal Index: | -1.501 |
| Spectral Index (Gamma): | 2.0589 |
| Column Density (NH): e | 1.87909 |
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 | 73 |
| V Magnitude: | V>19.2 |
| Other Filter Magnitudes: | B>20.8 U>20.2 UVW1=20.2 UVM2>20.7 UVW2>20.7 White>19.2 |
a J2000; b arcsec; c seconds
Other Burst Info:
Redshift:0.547 (Gemini: emission)Host Galaxy:
Other Observatory Detections:
PAIRITEL, Gemini, RAPTOR, Chandra, MDM (1.3m), Suzaku (WAM), Konus-Wind, VLA @ 8.5 GHz, Maidanak
Comments:
short hard burst
UVOT: summed image UVW1 detection at 4.8-σ
References:
BAT: GCN 4363; GCN 4365; arXiv:0707.4626
XRT: GCN 4363; GCN 4366; GCN 4374; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 4363; GCN 4373; GCN 4390
Radio: GCN 4416
Redshift: GCN 4384
Host: GCN 4375
Other: