GRB 120909A

Time: 01:42:03
Trigger Number: 533060
Burst Advocate: Stefan Immler

BAT Data:

RA: a 275.735
Dec: a -59.432
90% Error Radius: b 1.2
T90: c n/a
Fluence: d 68 (2)
1s Peak Photon Flux: e 1.8 (0.3)
Photon Index: f 1.39, PL (0.06)

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:

BAT Light Curve for GRB 120909A

XRT Data:

RA: a 18:22:56.77
Dec: a -59:26:55.0
90% Error Radius: b 1.4
Time to First Observation: c 93.42
Early Flux: d 755
11 Hour Flux: d 0.2152997
24 Hour Flux: d 0.0619185
Initial Temporal Index: -1.209
Spectral Index (Gamma): 2.06709
Column Density (NH): e 20.6609

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 3308
V Magnitude: V>20.2
Other Filter Magnitudes: B>21.5

a J2000; b arcsec; c seconds

Other Burst Info:

3.93 (VLT: absorption)
Host Galaxy:
Other Observatory Detections:
PROMPT, MPG/ESO (2.2m), VLT, Konus-Wind, Fermi (GBM), TAROT (25cm)


Because of an earth limb constraint, Swift slewed away before UVOT could take its initial exposures.


BAT: GCN 13727; GCN 13733
XRT: GCN 13727; GCN 13732; GCN 13734; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 13735
Redshift: GCN 13730 (VLT)