van Eerten, Hendrik J. 2011 拟合短暴的余辉光变

主要内容:
他们用数值计算模拟了狂多的长暴短暴的各种辐射。
见：
http://cosmo.nyu.edu/afterglowlibrary/

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Title:		Synthetic Off-axis Light Curves for Low-energy Gamma-Ray Bursts
Authors:		van Eerten, Hendrik J.; MacFadyen, Andrew I.
Affiliation:		AA(Center for Cosmology and Particle Physics, Physics Department, New York University, New York, NY 10003, USA), AB(Center for Cosmology and Particle Physics, Physics Department, New York University, New York, NY 10003, USA)
Publication:		The Astrophysical Journal Letters, Volume 733, Issue 2, article id. L37 (2011). (ApJL Homepage)
Publication Date:		06/2011
Origin:		IOP
Astronomy Keywords:		acceleration of particles, gamma-ray burst: general, hydrodynamics, methods: numerical
DOI:		10.1088/2041-8205/733/2/L37
Bibliographic Code:		2011ApJ...733L..37V

Abstract

We present results for a large number of gamma-ray burst (GRB) afterglow light curve calculations, done by combining high-resolution two-dimensional relativistic hydrodynamics simulations using RAM with a synchrotron radiation code. Results were obtained for jet energies, circumburst medium densities, and jet angles typical for short and underluminous GRBs, different observer angles, and observer frequencies from low radio (75 MHz) to X-ray (1.5 keV). We summarize the light curves through smooth power-law fits with up to three breaks, covering jet breaks for small observer angles, the rising phase for large observer angles, and the rise and decay of the counterjet. All light curve data are publicly available on the Web. The data can be used for model fits to observational data and as an aid for predicting observations by future telescopes such as LOFAR or the Square Kilometer Array and will benefit the study of neutron star mergers using different channels, such as gravitational-wave observations with LIGO or Virgo. For small observer angles, we find jet break times that vary significantly between frequencies, with the break time in the radio substantially postponed. Increasing the observer angle also postpones the measured jet break time. The rising phase of the light curve for large observer angle has a complex shape that cannot always be summarized by a simple power law. Except for very large observer angles, the counterjet is a distinct feature in the light curve, although in practice the signal will be exceedingly difficult to observe by then.

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