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Title: Spectral lag features of GRB 060814 from swift bat and Suzaku observations

This work reports a study on the spectral lag of the prompt emission spectrum of a multi-pulse gamma-ray burst (GRB) GRB 060814 (z = 0.84) using the observations of the Swift Burst Alert Telescope and the Suzaku Wide Area Monitor. We found that the spectral lag for GRB 060814 is positive for the first two and the fourth pulses, while the third pulse exhibits negative lag. However, the time variation of the E {sub peak} of all the stated pulses shows a similar trend. The leading models for spectral lags in GRBs are thus found inadequate to explain the observed spectral lag features of GRB 060814. Probable causes of the spectral lag characteristics of GRB 060814 are discussed.
Authors:
 [1] ; ;  [2]
  1. Also at the Department of Physics, Sikkim Manipal Institute of Technology, Majitar, Sikkim, India. (India)
  2. High Energy Cosmic Ray Research Centre, University of North Bengal, Siliguri, WB 734013 (India)
Publication Date:
OSTI Identifier:
22351400
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 782; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMIC GAMMA BURSTS; EMISSION SPECTRA; PULSES; TELESCOPES