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22 papers · 2 filters
Early optical afterglow lightcurves of neutron-fed Gamma-ray bursts
Y. Z. Fan, B. Zhang, D. M. Wei
In this paper, within the popular internal shock scenario of GRBs, we calculate the early optical afterglow lightcurves of a neutron-fed GRB fireball for different assumed neutron…
Gamma-Ray Bursts: Polarization of Afterglows from Two-Component Jets
X. F. Wu, Z. G. Dai, Y. F. Huang +1
Polarization behaviors of optical afterglows from two-component gamma-ray burst jets are investigated, assuming various configurations for the two components. In most cases, the ob…
Analytical light curves in the realistic model for GRB afterglows
X. F. Wu, Z. G. Dai, Y. F. Huang +1
(abridged) Afterglow light curves are constructed analytically for realistic gamma-ray burst remnants decelerating in either a homogeneous interstellar medium or a stellar wind env…
The Ultraviolet flash accompanying GRBs from neutron-rich internal shocks
Y. Z. Fan, D. M. Wei
In the neutron-rich internal shocks model for Gamma-ray Burts (GRBs), the Lorentz factors (LFs) of ions shells are variable, so are the LFs of accompanying neutron shells. For slow…
Optical afterglows of short Gamma-ray Bursts and GRB 040924
Y. Z. Fan, Bing Zhang, Shiho Kobayashi +1
Short-duration Gamma-ray bursts (GRBs) (\leq 2{\rm s}) have remained a mystery due to the lack of afterglow detection until recently. The models to interpret short GRBs invoke dist…
Pre-Maximum Spectropolarimetry of the Type Ia SN 2004dt
Lifan Wang, Dietrich Baade, Peter Hoeflich +5
We report observations of SN 2004dt obtained with the Very Large Telescope of the European Southern Observatory on August 13.30, 2004 when the supernova was more than a week before…