SIMBAD references

2013ApJ...778L..11Z - Astrophys. J., 778, L11 (2013/November-3)

Cosmological time dilation in durations of Swift long gamma-ray bursts.

ZHANG F.-W., FAN Y.-Z., SHAO L. and WEI D.-M.

Abstract (from CDS):

Cosmological time dilation is a fundamental phenomenon in an expanding universe, which stresses that both the duration and wavelength of the emitted light from a distant object at the redshift z will be dilated by a factor of 1 + z at the observer. By using a sample of 139 Swift long gamma-ray bursts with known redshift (z ≤ 8.2), we measure the observed duration (T90) in the observed energy range between 140/(1 + z) keV and 350/(1 + z) keV, corresponding to a fixed energy range of 140-350 keV in the rest frame. We obtain a significant correlation between the duration and the factor 1 + z, i.e., T90= 10.5(1 + z)0.94±0.26, which is consistent with that expected from the cosmological time dilation effect.

Abstract Copyright:

Journal keyword(s): gamma-ray burst: general - methods: data analysis

Simbad objects: 12

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