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

GRB 090423

Redshift:
8.0 (MPI/ESO: photometric)
~8.1 (TNG)
Host Galaxy:
Other Observatory Detections:
UKIRT, Gemini-North, MPI/ESO (2.2m), TNG (3.6m), Okayama Astrophysical Observatory (188cm), Fermi (GBM), Plateau de Bure Interferometer, Spitzer

Time: 07:55:19
Trigger Number: 350184
Burst Advocate: Hans Krimm

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)
148.891
09:55:33.8
18.165
18:09:54.0
1.1 10.3 5.9 (0.4) 1.7 (0.2) 0.80, CPL (0.50)

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)
09:55:33.26 18:08:57.9 1.4 72.48 n/a 0.04166331 0.013979004 -1.36 1.8158 56.4459

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 77 V>19.6 B>20.2
U>20.4
UVW1>20.1
UVM2>20.1
UVW2>20.5
White>21.3

a arcsec; b seconds

Comments:

UVOT: no detection

References:

BAT: GCN 9198; GCN 9204; GCN 9241
XRT: GCN 9198; GCN 9205; GCN 9212; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 9198; GCN 9210
Radio: GCB 9273 (Plateau de Bure)
Redshift: GCN 9215; GCN 9261 (MPI); GCN 9216 (TNG); GCN 9222 (TNG)
Host:
Other: GCN Report 211.1
GCN Report 211.2

BAT Light Curve:

BAT Light Curve for GRBblc/090423.png