Revisiting the characteristics of the spectral lags in short gamma-ray bursts

Abstract

In this paper, we restudy the spectral lag features of short bright gamma-ray bursts (T90 < 2.6s) with a BATSE time-tagged event (TTE) sample including 65 single pulse bursts. We also make an investigation on the characteristics of ratios between the spectral lag and the full width at half maximum ($FWHM$) of the pulses, called relative spectral lags (RSLs). We draw the conclusions as follows: 1) Spectral lags of short GRBs are normally distributed and concentrated on around the value of 0.014 with 40 percent of them having negative lags. With K-S test, we find the lag distribution is identical with a normal one caused by white noises, which indicates the lags of the vast majority of short bursts are so small that they are negligible as Norris et al. have suggested.

10 pages, 3 figures, accepted for publication in MNRAS

References in corpus (2)

• A new definition of the intermediate group of gamma-ray bursts
• On the Spectral Lags of the Short Gamma-Ray Bursts

Cited by in corpus (18)

• The Ep,i - Eiso correlation: type I gamma-ray bursts and the new classification method
• An analysis of the durations of Swift Gamma-Ray Bursts
• On the investigation of the closure relations for Gamma-Ray Bursts observed by Swift in the post-plateau phase and the GRB fundamental plane
• Catalog of Short Gamma-Ray Transients Detected in the SPI/INTEGRAL Experiment
• Temporal Properties of Precursors, Main peaks and Extended Emissions of Short GRBs in the Third Swift/BAT GRB Catalog
• A New Discriminator for Gamma-Ray Burst Classification: The Epeak-Fluence Energy Ratio
• On Spectral Peak Energy of Swift Gamma-Ray Bursts
• Identification of Extended Emission Gamma-Ray-Bursts Candidates using Machine Learning
• Properties of Gamma-Ray Bursts Associated with Supernovae and Kilonovae
• Broadband lightcurve characteristics of GRBs 980425 and 060218 and comparison with long-lag, wide-pulse GRBs
• The closure relations in optical afterglow of Gamma-Ray Bursts
• Interpretation of Radio Afterglows in the framework of the Standard Fireball and Energy Injection models
• Properties of Short GRB Pulses in the Fourth BATSE Catalog: Implications for Structure and Evolution of the Jetted Outflows
• Another short-burst host galaxy with an optically obscured high star formation rate: The case of GRB 071227
• Testing a new luminosity/redshift indicator for $\gamma$-ray bursts
• Overall Spectral Properties of Prompt Emissions with Diverse Segments in Swift/BAT Short Gamma-ray Bursts
• Relationship between pulse width and energy in GRB 060124: from X-ray to gamma-ray bands
• Outliers in spectral time lag selected gamma-ray bursts