Improved Correlation between the Variability and Peak Luminosity of Gamma-Ray Bursts

Abstract

A new procedure for smoothing a gamma-ray burst (GRB) lightcurve and calculating its variability is presented. Applying the procedure to a sample of 25 long GRBs, we have obtained a very tight correlation between the variability and the peak luminosity. The only significant outlier in the sample is GRB 030329. With this outlier excluded, the data scatter is reduced by a factor of \sim 3 compared to that of Guidorzi et al. (2005), measured by the deviation of fit. Possible causes for the outlier are discussed.

9 pages, including 7 figure. Expanded as requested by referee. An error in Fig. 1 was corrected (the two 1-sigma lines in the old version were wrong). Accepted for publication by MNRAS

References in corpus (15)

• Discovery of the peculiar supernova 1998bw in the error box of GRB980425
• The Physics of Gamma-Ray Bursts
• A very energetic supernova associated with the gamma-ray burst of 29 March 2003
• Intrinsic spectra and energetics of BeppoSAX Gamma-Ray Bursts with known redshifts
• Spectroscopic Discovery of the Supernova 2003dh Associated with GRB 030329
• The collimation--corrected GRB energies correlate with the peak energy of their $\nu F_{\nu }$ spectrum
• Connection Between Energy-dependent Lags And Peak Luminosity In Gamma-ray Bursts
• The afterglow, the redshift, and the extreme energetics of the gamma-ray burst 990123
• A Possible Cepheid-Like Luminosity Estimator for the Long Gamma-Ray Bursts
• Spectroscopy of the Host Galaxy of the Gamma--Ray Burst 980703
• Very high column density and small reddening towards GRB 020124 at z = 3.20
• The redshift determination of GRB 990506 and GRB 000418 with the Echellete Spectrograph Imager on Keck
• The GRB Variability/Peak Luminosity Correlation: new results
• Testing the GRB Variability/Peak Luminosity correlation using the pseudo-redshifts of a large sample of BATSE GRBs
• SCUBA sub-millimeter observations of gamma-ray bursters IV. GRB 021004, 021211, 030115, 030226, 041006

Cited by in corpus (19)

• The Hubble Diagram to Redshift >6 from 69 Gamma-Ray Bursts
• Gamma-Ray Bursts in the Swift Era
• Gamma Ray Bursts as standard candles to constrain the cosmological parameters
• Gamma-ray Burst Cosmology
• The redshift and afterglow of the extremely energetic gamma-ray burst GRB 080916C
• Gamma-ray burst prompt correlations: selection and instrumental effects
• The Swift/Fermi GRB 080928 from 1 eV to 150 keV
• How common are long Gamma-Ray Bursts in the Local Universe?
• Gamma Ray Burst Prompt correlations
• Variation of the Amati Relation with the Cosmological Redshift: a Selection Effect or an Evolution Effect?
• The slope of the GRB Variability/Peak Luminosity Correlation
• Testing the gamma-ray burst variability/peak luminosity correlation on a Swift homogeneous sample
• The morphology of the X-ray afterglows and of the jetted GeV emission in long GRBs
• Statistical analysis of BATSE gamma-ray bursts: Self-similarity and the Amati-relation
• Statistical Analysis of the Parameters of Gamma-Ray Bursts with Known Redshifts and Peaked Optical Light Curves
• A New Frequency-Luminosity Relation for Long GRBs?
• BLADE: An Automated Framework for Classifying Light Curves from the Center for Near-Earth Object Studies (CNEOS) Fireball Database
• Are There Any Redshift >8 Gamma-Ray Bursts in the BATSE Catalog?
• A statistical method to detect non-stationarities of gamma-ray burst jets