Gamma-ray burst afterglow broadband fitting based directly on
hydrodynamics simulations
BOXFIT is a freely available numerical code for broadband afterglow light curve data fitting and creating light curves and spectra, based on compressed output from a set of 114 high-resolution 2D hydrodynamics simulations. The source code and data files for BOXFIT can be downloaded from this page.
Important notes for BOXFIT version 2:
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Model fitting is still included, but deprecated.
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All times are in seconds (i.e. cgs units), no longer in days. Fluxes are still in mJy.
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Various settings in the parameter files have been renamed or added.
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Boosted frame BOX files require boosted frame compiled BOXFIT.
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Boosted frame BOX files do not cover late times, small ("medium") boost wind case excepted. Conversely lab frame simulations and small boost simulations do not properly cover very small angles (< 0.045 rad) at early times especially.
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Synchrotron self-absorption is treated via a different algorithm by default.
The user manual:
boxfitguidev2.pdf (version v2, BOXfit re-release)
source code:
the source code for BOXfit has been moved to github:
https://github.com/hveerten/boxfit (based on version v2 BOXfit re-release
Latest non-github version: boxfitv2.tar.gz (version v2, BOXfit re-release)
Note that starting with the github versions, BOXfit makes use of shared memory on nodes, whereas previous versions would separately load the BOX files into memory for each core, even when on the same node.
box files (containing compressed simulation data), lab frame ISM environment:
box files (containing compressed simulation data), medium boost wind environment:
box files (containing compressed simulation data), strong boost ISM environment:
box files (containing compressed simulation data), strong boost stellar wind environment:
Reference for BOXFIT:
"Gamma-ray burst afterglow broadband fitting based directly on hydrodynamics simulations"
Van Eerten, H.J.; Van Der Horst, A.J.; MacFadyen, Andrew
The Astrophysical Journal, Volume 749, p. 44 (2012)
When using this code in your own work, please also add to the acknowledgements:
Development of the Boxfit code was supported in part by NASA through grant NNX10AF62G
issued through the Astrophysics Theory Program and by the NSF through
grant AST-1009863. Simulations for BOXFIT version 2 have been carried out in part on the computing facilities of the Computational Center for Particle and Astrophysics (C2PAP) of the research cooperation "Excellence Cluster Universe" in Garching, Germany.
See also Astronomy Abstract Service (ADS)
PRIOR VERSION: BOXFIT v1
BOXFIT is a freely available numerical code for broadband afterglow light
curve data fitting and creating light curves and spectra, based on compressed
output from a set of 19 high-resolution 2D hydrodynamics simulations. The
source code and data files for BOXFIT can be downloaded from this page. Do not mix BOXFIT v2 BOX files with prior versions of BOXFIT.
The user manual:
boxfitguidev1.pdf (version v1, clean-up of v0.3)
source code:
boxfitv1.tar.gz (version v1, clean-up of v0.3)
box files (containing compressed simulation data):
Initial Release (0.3): boxfitv03.tar.gz , boxfitguidev03.pdf
The BOX files for v0.3 are the same as for v1.
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