Spectral Lag Relations in GRB Pulses Detected with HETE-2
Abstract
Using a pulse-fit method, we investigate the spectral lags between the traditional gamma-ray band (50-400 keV) and the X-ray band (6-25 keV) for 8 GRBs with known redshifts (GRB 010921, GRB 020124, GRB 020127, GRB 021211, GRB 030528, GRB 040924, GRB 041006, GRB 050408) detected with the WXM and FREGATE instruments aboard the HETE-2 satellite. We find several relations for the individual GRB pulses between the spectral lag and other observables, such as the luminosity, pulse duration, and peak energy (Epeak). The obtained results are consistent with those for BATSE, indicating that the BATSE correlations are still valid at lower energies (6-25 keV). Furthermore, we find that the photon energy dependence for the spectral lags can reconcile the simple curvature effect model. We discuss the implication of these results from various points of view.
Keywords
Cite
@article{arxiv.1002.3849,
title = {Spectral Lag Relations in GRB Pulses Detected with HETE-2},
author = {M. Arimoto and N. Kawai and K. Asano and K. Hurley and M. Suzuki and Y. E. Nakagawa and T. Shimokawabe and N. V. Pazmino and R. Sato and M. Matsuoka and A. Yoshida and T. Tamagawa and Y. Shirasaki and S. Sugita and I. Takahashi and J. -L. Atteia and A. Pelangeon and R. Vanderspek and C. Graziani and G. Prigozhin and J. Villasenor and J. G. Jernigan and G. B. Crew and T. Sakamoto and G. R. Ricker and S. E. Woosley and N. Butler and A. Levine and J. P. Doty and T. Q. Donaghy and D. Q. Lamb and E. Fenimore and M. Galassi and M. Boer and J. -P. Dezalay and J. -F. Olive and J. Braga and R. Manchanda and G. Pizzichini},
journal= {arXiv preprint arXiv:1002.3849},
year = {2015}
}
Comments
13 pages, 9 figures, accepted for the publication in PASJ (minor corrections)