Statistical classification of gamma-ray bursts based on the Amati relation
arXiv:1311.4713 · doi:10.1093/mnras/sts547
Abstract
Gamma-ray bursts (GRBs) are believed to belong to two classes and they are conventionally divided according to their durations. This classification scheme is not satisfied due to the fact that duration distributions of the two classes are heavily overlapped. We collect a new sample (153 sources) of GRBs and investigate the distribution of the logarithmic deviation of the value from the Amati relation. The distribution possesses an obvious bimodality structure and it can be accounted for by the combination of two Gaussian curves. Based on this analysis, we propose to statistically classify GRBs in the well-known vs. plane with the logarithmic deviation of the value. This classification scheme divides GRBs into two groups: Amati type bursts and non-Amati type bursts. While Amati type bursts well follow the Amati relation, non-Amati type bursts do not. It shows that most Amati type bursts are long duration bursts and the majority of non-Amati type bursts are short duration bursts. In addition, it reveals that Amati type bursts are generally more energetic than non-Amati type bursts. An advantage of the new classification is that the two kinds of burst are well distinguishable and therefore their members can be identified in certainty.
References in corpus (15)
- Long gamma-ray bursts and core-collapse supernovae have different environments
- No supernovae associated with two long-duration gamma ray bursts
- An enigmatic long-lasting gamma-ray burst not accompanied by a bright supernova
- A Complete Catalog of Swift GRB Spectra and Durations: Demise of a Physical Origin for Pre-Swift High-Energy Correlations
- Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614
- Short versus Long Gamma-Ray Bursts: spectra, energetics, and luminosities
- The Epeak-Eiso plane of long Gamma Ray Bursts and selection effects
- On the consistency of the peculiar GRBs 060218 and 060614 with the Ep,i - Eiso correlation
- Revisiting the Long/Soft-Short/Hard Classification of Gamma-Ray Bursts in the Fermi Era
- Peak energy of the prompt emission of long Gamma Ray Bursts vs their fluence and peak flux
- Generalized Tests for Selection Effects in GRB High-Energy Correlations
- Spectral analysis of Swift long GRBs with known redshift
- The short GRB070707 afterglow and its very faint host galaxy
- A New Discriminator for Gamma-Ray Burst Classification: The Epeak-Fluence Energy Ratio
- X-ray Flashes or soft Gamma-ray Bursts? The case of the likely distant XRF 040912
Cited by in corpus (25)
- Short-Duration Gamma-Ray Bursts
- The Ep,i - Eiso correlation: type I gamma-ray bursts and the new classification method
- GRB170817A associated with GW170817: multifrequency observations and modeling of prompt gamma-ray emission
- Cosmological Models and Gamma-Ray Bursts Calibrated by Using Pade Method
- Short vs. Long Gamma-Ray Bursts: A Comprehensive Study of Energetics and Prompt Gamma-Ray Correlations
- Gamma Ray Burst Prompt correlations
- A comprehensive statistical study on gamma-ray bursts
- GRB 221009A: An ordinary nearby GRB with extraordinary observational properties
- Are long gamma-ray bursts standard candles?
- The quest for new correlations in the realm of the Gamma-Ray Burst -- Supernova connection
- Determine the Lorentz factor and the viewing angle of GRB 170817A
- GRB 140102A: Insight into Prompt Spectral Evolution and Early Optical Afterglow Emission
- Two Dimensional Classification of the Swift/BAT GRBs
- Gamma-Ray Bursts with Extended Emission: Classifications, Energy Correlations and Radiation Properties
- Giant X-ray and optical Bump in GRBs: evidence for fall-back accretion model
- Low redshift calibration of the Amati relation using galaxy clusters
- A Multilevel Empirical Bayesian Approach to Estimating the Unknown Redshifts of 1366 BATSE Catalog Long-Duration Gamma-Ray Bursts
- Discovery of a Universal Correlation For Long and Short GRBs and Its Application on the Study of Luminosity Function and Formation Rate
- New evidence of multiple channels for the origin of gamma-ray bursts with extended emission
- Possible correlations between gamma-ray burst and its host galaxy offset
- GRB 210217A: A short or a long GRB?
- Revisiting the Spectral-Energy Correlations of GRBs with {\it Fermi} Data I: Model-wise Properties
- The Djorgovski-Gurzadyan dark energy integral equation and the Hubble diagram
- Confirmed width-Eiso and width-Liso relations in GRB: comparison with the Amati and Yonetoku relations
- Do Short GRBs Exhibit an Anticorrelation between Their Intrinsic Duration and Redshift?