GRB 130427A

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

BAT Data:

RA: a 173.150
Dec: a 27.706
90% Error Radius: b 1.0
T90: c 162.83
Fluence: d 3100 (30)
1s Peak Photon Flux: e 331.0 (4.6)
Photon Index: f 1.21, PL (0.02)

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 130427A

XRT Data:

RA: a 11:32:32.63
Dec: a 27:41:51.7
90% Error Radius: b 3.5
Time to First Observation: c 140.19
Early Flux: d 43800
11 Hour Flux: d 9.83052
24 Hour Flux: d 3.329276
Initial Temporal Index: -2.787
Spectral Index (Gamma): 1.78644
Column Density (NH): e 0.977721

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 147
V Magnitude: V=12.1
Other Filter Magnitudes: B=12.6

a J2000; b arcsec; c seconds

Other Burst Info:

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


This is an extremely bright burst in all three instruments.


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)