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GRB 120909A

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

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

Burst Alert Telescope (BAT):

RA
(J2000)
Dec
(J2000)
90% Error a
Radius
T90 b Fluence c
(15-150 keV)
1-sec Peak d
Photon Flux
(15-150 keV)
Photon Index e
(15-150 keV)
275.735
18:22:56.4
-59.432
-59:25:55.2
1.2 n/a 68 (2) 1.8 (0.3) 1.39, PL (0.06)

90% error in parentheses,
a arcmin; b seconds; c 10-7 erg/cm2; d ph/cm2/sec; e PL = simple power-law, CPL = cutoff power-law

X-Ray Telescope (XRT):

RA
(J2000)
Dec
(J2000)
90% Error a
Radius
Time to First b
Observation
Early Flux c
(0.3-10 keV)
11 Hour Flux c
(0.3-10 keV)
24 Hour Flux c
(0.3-10 keV)
Initial d
LC Index
Spectral
Index
(Gamma)
Column e
Density
(NH)
18:22:56.77 -59:26:55.0 1.4 93.42 755 0.2152997 0.0619185 -1.209 2.06709 20.6609

a arcsec; b seconds; c 10-11 erg/cm2/s; d temporal; e 1021 cm-2

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.

» XRT GRB Live Catalogue
» XRT Light Curves
» XRT Spectra

UltraViolet/Optical Telescope (UVOT):

RA
(J2000)
Dec
(J2000)
90% Error a
Radius
Time to First b
Observation
Magnitude Other Filter
Magnitudes
n/a n/a n/a 3308 V>20.2 B>21.5
U>21.4
UVW1>21.6
UVM2>21.4
UVW2>21.6
White=20.75

a arcsec; b seconds

Comments:

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

References:

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

BAT Light Curve:

BAT Light Curve for GRBblc/120909A.png