A comprehensive comparative study of temporal properties between X-ray flares and GRB pulses

Peng, Zhao-Yang; Yin, Yue; Yi, Ting-Feng; Bao, Y. Y.; Wu, H.

doi:10.1007/s10509-014-2149-7

Cited by 4 publications

(4 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Looking at the scatter plot of Lag − w in Figure 8, for the flares and GRB pulses, the Lag − w correlation also exists in flares, and their evolution slopes are close (see Table 2). This result is consistent with those from previous studies (Peng et al 2015). As well as Lag − w, for t rise − t decay , together with Lag − t rise and Lag − t decay , we also find that the evolution slopes of the pulses are close to those of the flares, and they can connect smoothly with one another.…”

Section: The Evolution Behaviors Of Pulses and Flares Among Grbssupporting

confidence: 93%

“…Guidorzi et al (2015) found that the distributions of the waiting times of prompt pulses and X-ray flares showed similar power-law behaviors. Peng et al (2015) presented a comprehensive comparison of the temporal characteristics of 24 optical flares, 92 X-ray flares, and 102 GRB pulses, finding that: the flares and the pulses had the same lag-width relationship, and the evolution slopes were very close; and the dependencies of the pulse widths, rise widths, and decay widths on energies were the same as for the flare. Their results suggest a direct link between the physical mechanisms that produce the flares and the prompt emission in GRBs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Study of the Overall Evolution Behaviors of Pulses and Flares within Gamma-Ray Bursts

Zhu

Peng

Chen

et al. 2023

ApJ

View full text Add to dashboard Cite

Many studies have shown that the X-ray flares in gamma-ray bursts (GRBs) have similar properties to the prompt emission pulses that occur in GRBs, suggesting that they may come from the same origin. We attempt to extend the evolution behavior that exists among GRBs to within individual GRBs. By selecting 12 GRBs with both multipulses and multiflares, we systematically study the overall evolution behaviors of the pulses and flares that occur within GRBs, including the width (w), peak time (t peak), rise time (t rise), decay time (t decay), and spectral lag. We find that correlated relationships exist within the GRBs, even if the overall evolution slopes of the pulses and flares in different GRBs are different. We also study the relations between the full pulse width (ω), the ratio of the rising width to the decay width (r/d), and the energy (E) of multipulses and multiflares within GRBs. It is found that there is a power-law anticorrelation between ω and E and a power-law correlation between r/d and E, with the mean values of the two power-law indexes being −0.42 and 0.07, respectively, which are very close to the values that are obtained for the prompt emission pulses. In addition, we find that the percentages of the positive lags for pulses and flares are 83% and 92%, respectively, with the lags of the flares being much larger than those of the pulses. Our results indicate that the overall evolution behaviors of the pulses and flares within individual GRBs are similar to the evolution behavior among GRBs, and that flares are low-energy extensions of pulses, providing further evidence that both come from the same origin.

show abstract

Section: The Evolution Behaviors Of Pulses and Flares Among Grbssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

A Study of the Overall Evolution Behaviors of Pulses and Flares within Gamma-Ray Bursts

Zhu

Peng

Chen

et al. 2023

ApJ

View full text Add to dashboard Cite

show abstract

“…Many authors afterwards [254][255][256][257][258][259][260][261][262][263][264] have used the motivated pulse profile of Willingale et al [108] for various studies on the prompt emission properties of the pulses.…”

Section: The -Correlation and Its Physical Interpretationmentioning

confidence: 99%

Gamma-Ray Burst Prompt Correlations

Dainotti

Vecchio

Tarnopolski

2018

Advances in Astronomy

View full text Add to dashboard Cite

The mechanism responsible for the prompt emission of gamma-ray bursts (GRBs) is still a debated issue. The prompt phase-related GRB correlations can allow discriminating among the most plausible theoretical models explaining this emission. We present an overview of the observational two-parameter correlations, their physical interpretations, and their use as redshift estimators and possibly as cosmological tools. The nowadays challenge is to make GRBs, the farthest stellar-scaled objects observed (up to redshift = 9.4), standard candles through well established and robust correlations. However, GRBs spanning several orders of magnitude in their energetics are far from being standard candles. We describe the advances in the prompt correlation research in the past decades, with particular focus paid to the discoveries in the last 20 years.

show abstract

“…This confirms that flares are distinctly different from the observed underlying afterglow emission. Several studies have been done to analyze various spectral and temporal properties of these flares observed in the X-ray and optical in comparison with the prompt emission properties (Sonbas et al 2013;Peng et al 2015;Yi et al 2016Yi et al , 2017Liu & Mao 2019;Chang et al 2021;Lü et al 2022;Shi et al 2022). Spectral studies have noted that flares possess energy fluence comparable to that of the prompt emission (Burrows et al 2005b;Falcone et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis of Long GRBs’ Prompt Emission and X-Ray Flares: Multivariate Clustering and Correlations

Saji,

Iyyani,

Mazde

2023

ApJS

View full text Add to dashboard Cite

The extensive observations done by the X-ray Telescope on board Neil Gehrels Swift Observatory have revealed the presence of late-time flares concurrent with the decaying afterglow emission. However, the origins of these flares are elusive. In this work, we make use of the large database of Swift observations (2005–2020) of long gamma-ray bursts (GRBs) to conduct a systematic statistical study between the prompt gamma-ray emission and X-ray flares by characterizing their temporal and spectral properties of duration, quiescent period, peak flux, fluence, minimum variability timescale, and spectral power-law index. The multidimensional database of parameters thereby generated was investigated by principal component analysis, which revealed there is no evident correlation between the different parameters of the prompt emission and X-ray flares. Furthermore, the correlation studies revealed that while there is a trend of positive correlation between the minimum variability timescale of the flare and its duration, and of strong negative correlation with its peak flux, there are no such correlations observed in the prompt emission. Similarly, we find a positive correlation between the quiescent period and the flare duration, and a negative correlation with the flare peak flux, while no such correlations are observed for the prompt emission of the GRBs. Finally, among the X-ray flares, we find two dominant classes, whose variations are driven by the minimum variability timescale, peak flux, and fluence of the flares. A catalog of these different parameters characterizing the prompt and flare emissions is presented.

show abstract

A comprehensive comparative study of temporal properties between X-ray flares and GRB pulses

Cited by 4 publications

References 49 publications

A Study of the Overall Evolution Behaviors of Pulses and Flares within Gamma-Ray Bursts

A Study of the Overall Evolution Behaviors of Pulses and Flares within Gamma-Ray Bursts

Gamma-Ray Burst Prompt Correlations

Statistical Analysis of Long GRBs’ Prompt Emission and X-Ray Flares: Multivariate Clustering and Correlations

Contact Info

Product

Resources

About