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GRB 150818A

Time: 11:36:32
Trigger Number: 652603
Burst Advocate: Valerio D'Elia

BAT Data:

RA: a 230.340
15:21:21.6
Dec: a 68.342
68:20:31.2
90% Error Radius: b 1.1
T90: c 123.3
Fluence: d 41 (2)
1s Peak Photon Flux: e 2.4 (0.3)
Photon Index: f 1.96, 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 150818A

XRT Data:

RA: a 15:21:25.44
Dec: a 68:20:31.3
90% Error Radius: b 1.6
Time to First Observation: c 84.45
Early Flux: d 1590
11 Hour Flux: d 0.04607164
24 Hour Flux: d 0.0266887164
Initial Temporal Index: -2.357
Spectral Index (Gamma): 1.9776
Column Density (NH): e 0.886699

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 15:21:25.43
Dec: a 68:20:33.0
90% Error Radius: b 0.66
Time to First Observation: c 94
V Magnitude: V>19.36
Other Filter Magnitudes: B=20.56
U=19.63
UVW1=18.78
UVM2=18.81
UVW2=18.90
White=19.68

a J2000; b arcsec; c seconds

Other Burst Info:

Redshift:
0.282 (GTC: emission from possible host)
Host Galaxy:
Other Observatory Detections:
NOT, AZT-33IK, Konus-Wind, GTC (10.4m), Zeiss-1000

Comments:

References:

BAT: GCN 18152; GCN 18157
XRT: GCN 18152; GCN 18159; GCN 18162; GCN 18166; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 18152; GCN 18155; GCN 18161
Radio:
Redshift: GCN 18177 (GTC)
Host:
Other: