The Swift Gamma-Ray Burst Mission Italian site U.K. site

GRB 120911A

Redshift:
Host Galaxy:
Other Observatory Detections:
Fermi (GBM)

Time: 07:08:33
Trigger Number: 533268
Burst Advocate: John Cannizzo

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)
357.966
23:51:51.8
63.090
63:05:24.0
1.6 17.8 11 (1) 2.7 (0.3) 1.71, PL (0.16)

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)
23:51:55.05 63:05:55.7 1.6 3333.2 10 0.027094068 0.010295964 -1.24 2.0211 9.03116

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 3323 V>19.9 B>21.5
U>20.4
UVW1>20.0
UVM2>21.1
UVW2>20.9
White>21.6

a arcsec; b seconds

Comments:

Due to an observing constraint, Swift did not slew until T0+51.6 minutes.
UVOT: no detection

References:

BAT: GCN 13744; GCN 13749
XRT: GCN 13746; GCN 13748; GCN 13750; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 13751
Radio:
Redshift:
Host:
Other: GCN Report 393.1

BAT Light Curve:

BAT Light Curve for GRBblc/120911A.png