GRB 070721A

Time: 10:01:08
Trigger Number: 285653
Burst Advocate: Houri Ziaeepour

BAT Data:

RA: a	3.144 00:12:34.6
Dec: a	-28.530 -28:31:48.0
90% Error Radius: b	2.3
T90: c	3.4
Fluence: d	0.71 (0.18)
1s Peak Photon Flux: e	0.7 (0.1)
Photon Index: f	2.46, PL (0.41)

---

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	00:12:39.13
Dec: a	-28:33:00.9
90% Error Radius: b	1.6
Time to First Observation: c	n/a
Early Flux: d	n/a
11 Hour Flux: d	0.014782443
24 Hour Flux: d	0.007986902
Initial Temporal Index:	-2.703
Spectral Index (Gamma):	2.46164
Column Density (NH): e	0.890624

---

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	00:12:39.22
Dec: a	-28:33:00.7
90% Error Radius: b	2.0
Time to First Observation: c	69
V Magnitude:	V=20.2
Other Filter Magnitudes:	B>19.5 U>20.0 UVW1>19.6 UVM2>19.2 UVW2>19.4 White=21.4

---

^a J2000; ^b arcsec; ^c seconds

Comments:

BAT: burst can be classified as an X-ray flash

References:

BAT: GCN 6639; GCN 6642
XRT: GCN 6639; GCN 6644; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 6648; GCN 6676
Radio:
Redshift:
Host:
Other: GCN Report 72.1
GCN Report 72.2