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GRB 180821A

Time: 16:40:34
Trigger Number: 854578
Burst Advocate: Aaron Tohuvavohu

BAT Data:

RA: a 7.739
00:30:57.4
Dec: a -38.612
-38:36:43.2
90% Error Radius: b 2.3
T90: c 64.00
Fluence: d 14 (3)
1s Peak Photon Flux: e n/a (n/a)
Photon Index: f 1.79, PL (0.31)

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 00:31:09.64
Dec: a -38:37:37.7
90% Error Radius: b 1.6
Time to First Observation: c 210.33
Early Flux: d 36.7
11 Hour Flux: d 0.05259072
24 Hour Flux: d 0.035938368
Initial Temporal Index: -3.932
Spectral Index (Gamma): 2.89113
Column Density (NH): e 3.765445

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 n/a
Dec: a n/a
90% Error Radius: b n/a
Time to First Observation: c 219
V Magnitude: V>17.7
Other Filter Magnitudes: B>19.3
U>18.6
UVW1>19.3
UVM2>20.5
UVW2>20.3
White>21.1

a J2000; b arcsec; c seconds

Other Burst Info:

Redshift:
Host Galaxy:
Other Observatory Detections:

Comments:

UVOT: no detection

References:

BAT: GCN 23158; GCN 23166
XRT: GCN 23158; GCN 23162; GCN 23164; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 23158; GCN 23167
Radio:
Redshift:
Host:
Other: