Changelog

0.3.0 (2018-12-30)

  • Release of the code for the published version of the paper.
  • Sped up gradient I/O for limb-darkened light curves.
  • Fixed bug that led to huge (> 100 MB) binary sizes on Linux machines.
  • Small miscellaneous bugfixes.

0.2.2 (2018-10-14)

  • Third release of the code for submission to the arXiv.
  • Implemented the faster equations for polynomial limb-darkening from Agol & Luger (2018, in prep).
  • Implemented gradients of planet-planet occultation light curves and added complete benchmarking of all derivatives in the System class.
  • Fixed memory issue in the System class that de-allocated the Primary and Secondary objects if they went out of scope on the Python side.
  • Small miscellaneous bugfixes.

0.2.1 (2018-10-01)

  • Second release of the code for resubmission to AJ.
  • Major code re-write. Redesigned user interface, easier to use, faster, and more flexible.
  • Maps are now instantiated via a single Map object that supports both spherical harmonic coefficients and limb darkening coefficients, as well as arbitrary combinations of both.
  • The Map class now accepts a nwav keyword specifying the number of wavelength bins (default 1). This allows users to easily and efficiently compute wavelength-dependent light curves from spectral surface maps.
  • The Primary and Secondary classes replaced the old Star and Planet classes for increased generality. These are now actual subclasses of Map, making them even easier to use.
  • Several modifications to the computation of the light curves were made to increase speed. The largest speed improvement is in the computation of gradients. The code is no longer limited by the STARRY_NGRAD parameter, and arbitrary number of gradients can now be taken efficiently.
  • Derivatives with respect to the map coefficients are no longer labeled as Y_{0,0}, Y_{1,-1}, … Instead, they are labeled by a single key y, whose value is a vector of derivatives corresponding to each element in the spherical harmonic vector y. The same applies to the limb darkening coefficients, whose derivatives are stored in they key u.
  • Minor changes to the names of some keywords and class properties, and to some call sequences.
  • Minor bug fixes here and there.

0.1.2 (2018-07-15)

  • Initial stable beta release of the code for submission to AJ.
  • Implements simple Map and LimbDarkenedMap surface maps for arbitrary surface maps and radial (limb-darkened) surface maps, respectively. Also implements a simple System class for modeling light curves of Keplerian star-planet systems.
  • Supports gradient computation via autodifferentiation in the grad module and multi-precision floating point calculations in the multi module.