Scientific Algorithms

This documentation has a lot of stubs.

• Basic astronomical calculations (pwkit.astutil)
  • Useful Constants
  • Sexagesimal Notation
  • Working with Angles
  • Simple Operations on 2D Gaussians
  • Basic Astrometry
  • Miscellaneous Astronomical Computations
• File-format-agnostic loading of astronomical images (pwkit.astimage)
  • AstroImage
  • FITSImage
  • MIRIADImage
  • PyrapImage
  • SimpleImage
  • UnsupportedError
• The Bayesian Blocks algorithm (pwkit.bblocks)
  • bin_bblock()
  • bs_tt_bblock()
  • tt_bblock()
• Constants in CGS units (pwkit.cgs)
• Simple synchrotron radiation emission coefficients (pwkit.dulk_models)
  • Free-free emission
  • Gyrosynchrotron emission
  • Relativistic synchrotron emission
  • Helpers
• Representations of and computations with ellipses (pwkit.ellipses)
  • abcd2()
  • abcell()
  • bivabc()
  • bivell()
  • bivnorm()
  • bivrandom()
  • clscale()
  • databiv()
  • ellabc()
  • ellbiv()
  • elld2()
  • ellplot()
  • ellpoint()
  • sigmascale()
• Run the Fleischman & Kuznetsov (2010) synchrotron code (pwkit.fk10)
  • Installing the code
  • Calculator
• Modeling sources in images (pwkit.immodel)
• Bayesian confidence intervals for count rates (pwkit.kbn_conf)
  • kbn_conf()
• Nonlinear least-squares minimization with Levenberg-Marquardt (pwkit.lmmin)
  • Problem
  • Solution
• Fitting generic models with least-squares minimization (pwkit.lsqmdl)
  • ModelBase
  • Parameter
  • Generic Nonlinear Modeling
  • One-dimensional Polynomial Modeling
  • Modeling of a Single Scale Factor
  • Modeling With Pluggable Components
• Math with uncertain and censored measurements (pwkit.msmt)
  • LimitError
  • Lval
  • Textual
  • UQUANT_UNCERT
  • Uval
  • errinfo()
  • find_gamma_params()
  • fmtinfo()
  • liminfo()
  • limtype()
  • repval()
  • sample_double_norm()
  • sample_gamma()
  • unwrap()
  • uval_dtype
• Period-finding with Phase Dispersion Minimization (pwkit.pdm)
  • PDMResult
  • pdm()
• Loading the outputs of PHOENIX atmospheric models (pwkit.phoenix)
  • load_spectrum()
• Flux density models of radio calibrators (pwkit.radio_cal_models)
  • cas_a()
  • init_cas_a()
• Helpers for X-ray spectral modeling with the Sherpa packge (pwkit.sherpa)
  • Additional Spectral Models
  • Tools for Plotting with Sherpa Data Objects
  • Data Structure Utilities
• Synthetic photometry (pwkit.synphot)
  • Example
  • Conventions
  • References
  • The Registry class
  • The Bandpass class
  • Simple, careful conversions
  • Exceptions
• Scaling relations for physical properties of ultra-cool dwarfs (pwkit.ucd_physics)
  • bcj_from_spt()
  • bck_from_spt()
  • load_bcah98_mass_radius()
  • mass_from_j()
  • mk_radius_from_mass_bcah98()
  • tauc_from_mass()