GRB 051221B

Time: 20:03:20
Trigger Number: 173904
Burst Advocate: Padi Boyd

BAT Data:

RA: a	312.378 20:49:30.7
Dec: a	53.041 53:02:27.6
90% Error Radius: b	1.6
T90: c	39.900
Fluence: d	9.17 (1.04)
1s Peak Photon Flux: e	0.54 (0.20)
Photon Index: f	1.34, PL (0.19)

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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	20:49:35.35
Dec: a	53:02:11.1
90% Error Radius: b	2.1
Time to First Observation: c	275.72
Early Flux: d	n/a
11 Hour Flux: d	0.0000000000000001857115
24 Hour Flux: d	0.0000000000000000004250623
Initial Temporal Index:	-7.793
Spectral Index (Gamma):	2.07809
Column Density (NH): e	14.7827

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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	275
V Magnitude:	n/a
Other Filter Magnitudes:	n/a

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^a J2000; ^b arcsec; ^c seconds

Comments:

Cannot rule out the possibility that it is a hard x-ray transient

References:

BAT: GCN 4376; GCN 4382; arXiv:0707.4626
XRT: GCN 4376; GCN 4378; GCN 4796; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 4376
Radio:
Redshift:
Host:
Other: