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GRB 130427A

Redshift:
0.34 (Gemini-North: absorption)
0.338 (NOT: absorption)
0.3399 (VLT: absorption)
0.340 (LBT: absorption)
0.3399 (William Herschel: emission, host)
0.3393 (BTA)
Host Galaxy:
Irregular galaxy, with a broadly elliptical shape (William Herschel).
Other Observatory Detections:
ISON-NM (0.45m), Palomar 60", Faulkes North (2m), PAIRITEL (1.3m), MITSuME (50cm), Gemini-North, iTelescope (T11, T21, T30), Weihai (1m), HJT (1.5m), MAXI/GSC, GMG (2.4m), Zadko (100cm), Fermi (LAT, GBM), AZT-11, T100 (1.0m), RAPTOR, NOT (2.5m), VLA @ 5.8 GHz, SNUO (0.6m), SOAO (0.6m), BOAO, CARMA @ 85 GHz, INTEGRAL, Kanata (1.5m), Konus-Wind, ARIES Nainital (1.04m), Stansbury Park (0.35m), VLT, TNT (80cm), CARMA @ 93 GHz, Nayuta (2m), PROMPT (16"), CrAO RT-22 @ 36 GHz, SARA (0.9m), Challis Observatory (0.4m), Murikabushi (1m), AGILE, GMRT @ 1390 GHz, ABT (10"), VLA @ 20-22 GHz, KAIT (0.76m), Murikabushi (1m), Pan-STARRS 1 (1.8 m), RHESSI, Tautenburg (1.43m), Sandvreten Observatory (0.45m), NOT, Watcher (40cm), LBT, Keck, William Herschel (4.2m), AZT-33IK, GTC (10.4m), HST, BTA (6m), Konkoly Observatory

Time: 07:47:57
Trigger Number: 554620
Burst Advocate: Alessandro Maselli

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)
173.150
11:32:36.0
27.706
27:42:21.6
1.0 162.83 3100 (30) 331.0 (4.6) 1.21, PL (0.02)

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)
11:32:32.63 27:41:51.7 3.5 140.19 43800 9.83052 3.329276 -2.787 1.78644 0.977721

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 147 V=12.1 B=12.6
U=11.8
UVW1=11.2
UVM2=11.2
UVW2=11.2
White=13.8

a arcsec; b seconds

Comments:

This is an extremely bright burst in all three instruments.

References:

BAT: GCN 14448; GCN 14470
XRT: GCN 14448; GCN 14485; GCN 14502; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 14448; GCN 14472
Radio: GCN 14480 (VLA); GCN 14482 (CARMA); GCN 14494 (CARMA); GCN 14505 (RT-22); GCN 14519 (GMRT); GCN 14522 (VLA)
Redshift: GCN 14455 (Gemini-North); GCN 14478 (NOT); GCN 14491 (VLT); GCN 14605 (LBT); GCN 14617 (William Herschel); GCN 14669 (BTA)
Host: GCN 14617 (William Herschel)
Other:

BAT Light Curve:

BAT Light Curve for GRBblc/130427A.png