GRB 050421

Time: 04:11:52
Trigger Number: 115135
Burst Advocate: Louis Barbier

BAT Data:

RA: a	307.341 20:29:21.8
Dec: a	73.678 73:40:40.8
90% Error Radius: b	2.7
T90: c	15.000
Fluence: d	1.45 (0.40)
1s Peak Photon Flux: e	0.26 (0.19)
Photon Index: f	1.56, PL (0.43)

---

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:

XRT Data:

RA: a	20:29:02.75
Dec: a	73:39:17.7
90% Error Radius: b	1.7
Time to First Observation: c	n/a
Early Flux: d	n/a
11 Hour Flux: d	0.00000001489845
24 Hour Flux: d	0.0000000006240045
Initial Temporal Index:	-1.065
Spectral Index (Gamma):	2.29859
Column Density (NH): e	6.74594

---

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	112
V Magnitude:	V>17.5
Other Filter Magnitudes:	B>19.1 U>18.8

---

^a J2000; ^b arcsec; ^c seconds

Comments:

BAT: weak GRB, FRED lightcurve

References:

BAT: GCN 3296; GCN 3305; TS table 9/13/05, 9/24/05; arXiv:0707.4626
XRT: GCN 3296; GCN 3301; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 3296; GCN 3307
Radio:
Redshift:
Host:
Other: A&A, 452, 819, 2006