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Determination of the intrinsic Luminosity Time Correlation in the X-ray Afterglows of GRBs
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Gamma-ray bursts (GRBs), which have been observed up to redshifts z approx 9.5 can be good probes of the early universe and have the potential of testing cosmological models. The analysis by Dainotti of GRB Swift afterglow lightcurves with known redshifts and definite X-ray plateau shows an anti-correlation between the rest frame time when the plateau ends (the plateau end time) and the calculated luminosity at that time (or approximately an anti-correlation between plateau duration and luminosity). We present here an update of this correlation with a larger data sample of 101 GRBs with good lightcurves. Since some of this correlation could result from the redshift dependences of these intrinsic parameters, namely their cosmological evolution we use the Efron-Petrosian method to reveal the intrinsic nature of this correlation. We find that a substantial part of the correlation is intrinsic and describe how we recover it and how this can be used to constrain physical models of the plateau emission, whose origin is still unknown. The present result could help clarifing the debated issue about the nature of the plateau emission.
Forward citations
Cited by 4 Pith papers
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Model-independent calibration of Gamma-Ray Bursts with neural networks
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A conference summary of the authors' prior work, reporting that model-based gap filling reduces GRB light-curve fitting uncertainties without new data or validation.
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Supernovae Ia, high-redshift probes, and the Hubble tension: current status and future perspectives
A review of the authors' own binned supernova analyses reporting a mild redshift-dependent Hubble constant, plus a discussion of high-redshift probes.
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A review of long lasting activities of the central engine of gamma-ray bursts
A review of ultra-long gamma-ray bursts and X-ray plateau phases as evidence that the central engine keeps working long after the first flash.
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