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GRB 150821A

Time: 09:44:00
Trigger Number: 652847
Burst Advocate: Nora Troja

BAT Data:

RA: a 341.913
22:47:39.1
Dec: a -57.883
-57:52:58.8
90% Error Radius: b 1.7
T90: c 172.1
Fluence: d 7.9 (1.9)
1s Peak Photon Flux: e n/a (n/a)
Photon Index: f 2.10, PL (0.37)

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 150821A

XRT Data:

RA: a 22:47:39.13
Dec: a -57:53:38.1
90% Error Radius: b 1.4
Time to First Observation: c 243.26
Early Flux: d 349
11 Hour Flux: d 0.07879995
24 Hour Flux: d 0.0288219258
Initial Temporal Index: -0.655
Spectral Index (Gamma): 2.21622
Column Density (NH): e 21.9065

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 22:47:39.18
Dec: a -57:53:38.1
90% Error Radius: b 0.61
Time to First Observation: c 251
V Magnitude: n/a
Other Filter Magnitudes: V=17.21
B=17.48
U=16.70
UVW1=17.62
UVM2>19.8
UVW2=19.85
White=16.59

a J2000; b arcsec; c seconds

Other Burst Info:

Redshift:
0.755 (VLT: absorption)
Host Galaxy:
Other Observatory Detections:
VLT, Fermi (GBM), MPG (2.2m), Siding Springs (1m), Konus-Wind

Comments:

References:

BAT: GCN 18186; GCN 18196
XRT: GCN 18186; GCN 18191; GCN 18194; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 18186; GCN 18192; GCN 18224
Radio:
Redshift: GCN 18187 (VLT)
Host:
Other: