A possible use of Fourier Transform analysis method as a distance estimator

Details A possible use of Fourier Transform analysis method as a distance estimator A possible use of Fourier Transform analysis method as a distance estimator

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...383l...1c&link_type=abstract

Astronomy and Astrophysics, v.383, p.L1-L4 (2002)

Astronomy and Astrophysics

Astrophysics

6

Cosmology: Theory, Gamma Rays: Bursts, Methods: Data Analysis

Scientific paper

We speculate on the possibility of using the Fourier transform analysis method as a distance estimator of the observed gamma-ray bursts (GRBs). It is based on a hypothetical empirical relation between the redshift and the power-law index of power density spectra (PDSs) of the observed GRBs. This relation is constructed by using the fact that the observed power-law index is dependent upon a characteristic timescale of GRB light curves. The rms error of redshift estimates is 0.42 for an empirical relation obtained with the 7 long (T90 > 15) GRBs observed by the BATSE whose redshift information is available. We attempt to determine the spatial distribution of the GRBs observed by the BATSE as a function of redshifts on the basis of the resulting redshift estimator. We discuss possible uncertainties of the suggested method.

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