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GRB 250331B

Time: 04:19:43
Trigger Number: 1299965
Burst Advocate: Brad Cenko

BAT Data:

RA: a 71.381
04:45:31.4
Dec: a 43.805
43:48:18.0
90% Error Radius: b 3
T90: c n/a
Fluence: d n/a (n/a)
1s Peak Photon Flux: e n/a (n/a)
Photon Index: f n/a (n/a)

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 04:45:29.32
Dec: a 43:48:45.2
90% Error Radius: b 3.6
Time to First Observation: c 313.9
Early Flux: d n/a
11 Hour Flux: d n/a
24 Hour Flux: d n/a
Initial Temporal Index: -1.11
Spectral Index (Gamma): 2.2
Column Density (NH): e 21

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 317
V Magnitude: V>18.3
Other Filter Magnitudes: B>18.3
U>18.6
UVW1>18.0
UVM2>17.7
UVW2>18.4
White>19.9

a J2000; b arcsec; c seconds

Other Burst Info:

Redshift:
Host Galaxy:
Other Observatory Detections:

Comments:

UVOT: no detection

References:

BAT: GCN 39958
XRT: GCN 39958; GCN 39974; GCN 39995
UVOT: GCN 39958; GCN 40002
Radio:
Redshift:
Host:
Other: