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GRB 210504A

Time: 13:54:53
Trigger Number: 1046782
Burst Advocate: Andy Beardmore

BAT Data:

RA: a 222.379
14:49:31.0
Dec: a -30.557
-30:33:25.2
90% Error Radius: b 2.1
T90: c 135.06
Fluence: d 27 (2)
1s Peak Photon Flux: e 0.9 (0.2)
Photon Index: f 1.64, PL (0.13)

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 14:49:33.89
Dec: a -30:32:00.5
90% Error Radius: b 2.0
Time to First Observation: c 218
Early Flux: d n/a
11 Hour Flux: d 0.035433123
24 Hour Flux: d 0.0206848707
Initial Temporal Index: -2.963
Spectral Index (Gamma): 2.11488
Column Density (NH): e 0.0000426977

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 14:49:34.03
Dec: a -30:32:02.2
90% Error Radius: b 0.6
Time to First Observation: c 218
V Magnitude: V>18.26
Other Filter Magnitudes: B=19.17
U>18.89
UVW1>18.49
UVM2>17.24
UVW2>18.60
White=19.75

a J2000; b arcsec; c seconds

Other Burst Info:

Redshift:
2.077 (VLT: absorption)
Host Galaxy:
Other Observatory Detections:
NOT, VLT, Lowell Discovery Telescope (4.3m)

Comments:

References:

BAT: GCN 29929; GCN 29930; GCN 29939
XRT: GCN 29929; GCN 29942; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 29929; GCN 29933
Radio:
Redshift: GCN 29944 (VLT)
Host:
Other: