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GalSim: Modular galaxy image simulation toolkit

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owlice
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GalSim: Modular galaxy image simulation toolkit

Postby owlice » Wed Feb 05, 2014 1:26 pm

GalSim: Modular galaxy image simulation toolkit

Abstract: GalSim is a fast, modular software package for simulation of astronomical images. Though its primary purpose is for tests of weak lensing analysis methods, it can be used for other purposes. GalSim allows galaxies and PSFs to be represented in a variety of ways, and can apply shear, magnification, dilation, or rotation to a galaxy profile including lensing-based models from a power spectrum or NFW halo profile. It can write images in regular FITS files, FITS data cubes, or multi-extension FITS files. It can also compress the output files using various compressions including gzip, bzip2, and rice. The user interface is in python or via configuration scripts, and the computations are done in C++ for speed.

Credit: Rowe, Barney; Jarvis, Mike; Mandelbaum, Rachel

Site: https://github.com/GalSim-developers/GalSim
http://adsabs.harvard.edu/abs/2014ApJS..212....5M

Bibcode: 2014ascl.soft02009R

ID: ascl:1402.009
Last edited by Ada Coda on Thu Oct 11, 2018 2:27 pm, edited 1 time in total.
Reason: Updated code entry.
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augustmuench
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Re: GalSim: Modular galaxy image simulation toolkit

Postby augustmuench » Wed Mar 25, 2015 1:10 am

Two points:

  • The Github repository points to a different arXiv entry (http://arxiv.org/abs/1407.7676) that resolves (only VERY recently) to an Astronomy & Computing article (http://dx.doi.org/10.1016/j.ascom.2015.02.002).
  • How was the "credit" determined for this entry? Interestingly, the current order matches the 1st three authors of the A&C article I list above, but not the github contributors nor the extant arXiv link.
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owlice
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Re: GalSim: Modular galaxy image simulation toolkit

Postby owlice » Wed Mar 25, 2015 1:35 am

This code was submitted by the one of the lead developers in December 2013 and included the arXiv link; the submission predates the A&C paper.
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augustmuench
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Re: GalSim: Modular galaxy image simulation toolkit

Postby augustmuench » Wed Mar 25, 2015 4:05 pm

Is there a procedure for updating the record if new information comes into existence?
--
August (Gus) Muench
Journals Data Scientist
American Astronomical Society
august.muench@aas.org
august.fly@gmail.com
(202) 328-2010 x118

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owlice
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Re: GalSim: Modular galaxy image simulation toolkit

Postby owlice » Wed Mar 25, 2015 6:03 pm

Yes, but whether the record is changed depends on what the new information is. The most common updates are to links, either because the software has moved to a new site or because additional papers that use the code are found. We run a link-checker regularly for the site links and update them accordingly.

If there are errors in the record -- we email authors asking them to check for errors after a record has been created -- we correct the record. For information that may be ephemeral, we hope authors keep their sites up-to-date with that information, and if they'd like to post updates to the code thread here, well, that's a major reason for having the thread!
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