GRB 120811A
Time: 02:35:18
Trigger Number: 530581
Burst Advocate: Binbin Zhang
BAT Data:
| RA: a | 257.184 17:08:44.2 |
| Dec: a | -22.735 -22:44:06.0 |
| 90% Error Radius: b | 2.6 |
| T90: c | 166 |
| Fluence: d | 11 (1) |
| 1s Peak Photon Flux: e | 1.0 (0.1) |
| Photon Index: f | 1.95, PL (0.20) |
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 | 17:08:39.70 |
| Dec: a | -22:42:38.0 |
| 90% Error Radius: b | 2.8 |
| Time to First Observation: c | n/a |
| Early Flux: d | n/a |
| 11 Hour Flux: d | 0.08926366 |
| 24 Hour Flux: d | 0.052599426 |
| Initial Temporal Index: | -0.6779 |
| Spectral Index (Gamma): | 1.99897 |
| Column Density (NH): e | 8.66874 |
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 | 5627 |
| V Magnitude: | V>19.1 |
| Other Filter Magnitudes: | B>20.2 U>20.0 UVW1>19.9 UVW2>19.8 White>20.7 |
a J2000; b arcsec; c seconds
Other Burst Info:
Redshift:Host Galaxy:
Other Observatory Detections:
Comments:
While the BAT lightcurve and spectral results are consistant with a GRB origin for this trigger, given that the galactic coordinates are (lon,lat)=(0.6,10.3) deg, we cannot rule out a galactic source origin.
XRT: The fact that the XRT source is fading suggests that Swift trigger 530581 is most likely a GRB.
UVOT: no detection
References:
BAT: GCN 13618; GCN 13633
XRT: GCN 13641; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 13641
Radio:
Redshift:
Host:
Other: GCN Report 413.1