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GRB 080804

Time: 23:20:14
Trigger Number: 319016
Burst Advocate: Judy Racusin

BAT Data:

RA: a 328.675
21:54:42.0
Dec: a -53.189
-53:11:20.4
90% Error Radius: b 1.2
T90: c 34
Fluence: d 36 (2)
1s Peak Photon Flux: e 3.1 (0.4)
Photon Index: f 1.19, PL (0.09)

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:

BAT Light Curve for GRB 080804

XRT Data:

RA: a 21:54:40.11
Dec: a -53:11:05.3
90% Error Radius: b 1.4
Time to First Observation: c 99.04
Early Flux: d 55
11 Hour Flux: d 0.0682385
24 Hour Flux: d 0.028811486
Initial Temporal Index: -1.105
Spectral Index (Gamma): 1.81617
Column Density (NH): e 1.36745

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 21:54:40.2
Dec: a -53:11:04.6
90% Error Radius: b 0.4
Time to First Observation: c 91
V Magnitude: V=17.17
Other Filter Magnitudes: B=18.1
U=17.4
UVW1=20.9
UVM2>20.8
UVW2>21.8
White=16.83

a J2000; b arcsec; c seconds

Other Burst Info:

Redshift:
2.2045 (VLT: absorption)
2.20 (Gemini-South: absorption)
Host Galaxy:
Other Observatory Detections:
ROTSE-IIIc, VLT, Faulkes South, Gemini-South, ESO/MPI (2.2m)

Comments:

References:

BAT: GCN 8057; GCN 8067
XRT: GCN 8057; GCN 8066; GCN 8070; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 8057; GCN 8069
Radio:
Redshift: GCN 8058 (VLT); GCN 8065 (Gemini-South)
Host:
Other: GCN Report 158.1