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GRB 100728B

Time: 10:31:55
Trigger Number: 430172
Burst Advocate: David Morris

BAT Data:

RA: a 44.051
02:56:12.2
Dec: a 0.296
00:17:45.6
90% Error Radius: b 1.5
T90: c 12.1
Fluence: d 17 (1)
1s Peak Photon Flux: e 3.5 (0.5)
Photon Index: f 1.55, PL (0.14)

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 02:56:13.50
Dec: a 00:16:51.8
90% Error Radius: b 1.5
Time to First Observation: c 97.05
Early Flux: d n/a
11 Hour Flux: d 0.021160965
24 Hour Flux: d 0.006448505
Initial Temporal Index: -1.033
Spectral Index (Gamma): 2.04379
Column Density (NH): e 3.94372

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 02:56:13.467
Dec: a 00:16:52.18
90% Error Radius: b 0.52
Time to First Observation: c 100
V Magnitude: V=20.19
Other Filter Magnitudes: B=20.47
U=19.90
UVW1>20.50
UVM2>20.52
UVW2>20.93
White=17.43

a J2000; b arcsec; c seconds

Other Burst Info:

Redshift:
~2.8 (UVOT: photometric)
2.106 (VLT: absorption)
Host Galaxy:
Other Observatory Detections:
KAIT, Lick (1.0m), PROMPT (16"), ISON-NM Observatory (0.45m), MPI/ESO (2.2m), Fermi (GBM), NOT, VLT

Comments:

UVOT: The non-detection in the UV filters suggests a photometric redshift of z~2.8

References:

BAT: GCN 11009; GCN 11023
XRT: GCN 11009; GCN 11017; GCN 11022; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 11009; GCN 11026; GCN 11028; GCN 11029
Radio:
Redshift: GCN 11026 (UVOT); GCN 11317 (VLT)
Host:
Other: