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GRB 090809

Time: 17:31:14
Trigger Number: 359530
Burst Advocate: Craig Markwardt

BAT Data:

RA: a 328.665
21:54:39.6
Dec: a -0.083
-00:04:58.8
90% Error Radius: b 2.0
T90: c 5.4
Fluence: d 3.4 (0.5)
1s Peak Photon Flux: e 1.1 (0.2)
Photon Index: f 1.34, PL (0.24)

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 21:54:43.20
Dec: a -00:05:01.4
90% Error Radius: b 1.4
Time to First Observation: c 104.02
Early Flux: d n/a
11 Hour Flux: d 0.05008357
24 Hour Flux: d 0.021830222
Initial Temporal Index: -1.064
Spectral Index (Gamma): 1.94644
Column Density (NH): e 8.30851

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 21:54:43.19
Dec: a -00:05:01.83
90% Error Radius: b 0.6
Time to First Observation: c 108
V Magnitude: V=19.87
Other Filter Magnitudes: B>21.1
U>20.8
UVW1>20.7
UVM2>20.5
UVW2>21.6
White=19.53

a J2000; b arcsec; c seconds

Other Burst Info:

Redshift:
2.737 (VLT)
Host Galaxy:
Other Observatory Detections:
NOT, VLT, WHT

Comments:

References:

BAT: GCN 9754; GCN 9756
XRT: GCN 9754; GCN 9757; GCN 9759; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 9754; GCN 9758
Radio:
Redshift: GCN 9761 (VLT)
Host:
Other: