TY - JOUR
T1 - Spectral-lag relations in GRB pulses detected with HETE-2
AU - Arimoto, Makoto
AU - Kawai, Nobuyuki
AU - Asano, Katsuaki
AU - Hurley, Kevin
AU - Suzuki, Motoko
AU - Nakagawa, Yujin E.
AU - Shimokawabe, Takashi
AU - Pazmino, Nicolas Vasquez
AU - Sato, Rie
AU - Matsuoka, Masaru
AU - Yoshida, Atsumasa
AU - Tamagawa, Toru
AU - Shirasaki, Yuji
AU - Sugita, Satoshi
AU - Takahashi, Ichiro
AU - Atteia, Jean Luc
AU - Pelangeon, Alexandre
AU - Vanderspek, Roland
AU - Graziani, Carlo
AU - Prigozhin, Gregory
AU - Villasenor, Joel
AU - Jernigan, J. Garrett
AU - Crew, Geoffrey B.
AU - Sakamoto, Takanori
AU - Ricker, George R.
AU - Woosley, Stanford E.
AU - Butler, Nat
AU - Levine, Alan
AU - Doty, John P.
AU - Donaghy, Timothy Q.
AU - Lamb, Donald Q.
AU - Fenimore, Edward
AU - Galassi, Mark
AU - Boer, Michel
AU - Dezalay, Jean Pascal
AU - Olive, Jean François
AU - Braga, João
AU - Manchanda, Ravi
AU - Pizzichini, Graziella
PY - 2010/4/25
Y1 - 2010/4/25
N2 - Using a pulse-fit method, we investigated the spectral lags between the traditional gamma-ray band (50-400 keV) and the X-ray band (6-25keV) for 8 GRBs with known redshifts (GRB 010921, GRB 020124, GRB 020127, GRB 021211, GRB 030528, GRB 040924, GRB 041006, and GRB 050408), detected with the WXM and FREGATE instruments aboard the HETE-2 satellite. We found several relations for 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 found that me photon energy dependence for the spectral lags can be reconciled with the simple curvature effect model. We discuss the implications of these results from various points of view.
AB - Using a pulse-fit method, we investigated the spectral lags between the traditional gamma-ray band (50-400 keV) and the X-ray band (6-25keV) for 8 GRBs with known redshifts (GRB 010921, GRB 020124, GRB 020127, GRB 021211, GRB 030528, GRB 040924, GRB 041006, and GRB 050408), detected with the WXM and FREGATE instruments aboard the HETE-2 satellite. We found several relations for 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 found that me photon energy dependence for the spectral lags can be reconciled with the simple curvature effect model. We discuss the implications of these results from various points of view.
KW - Gamma rays: Bursts
KW - Gamma rays: observations
KW - Radiation mechanisms: non-thermal
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M3 - Article
AN - SCOPUS:77953341742
SN - 0004-6264
VL - 62
SP - 487
EP - 499
JO - Publications of the Astronomical Society of Japan
JF - Publications of the Astronomical Society of Japan
IS - 2
ER -