firefly (Fitting IteRativEly For Likelihood analYsis): a full spectral fitting code

ULySS: A Full Spectrum Fitting Package

Aims. We provide an easy-to-use full-spectrum fitting package and explore its applications to (i) the determination of the stellar atmospheric parameters and (ii) the study of the history of stellar populations. Methods. We developed ULySS, a package to fit spectroscopic observations against a linear combination of non-linear model components convolved with a parametric line-of-sight velocity d...

frailtyHL: A Package for Fitting Frailty Models with H-likelihood

We present the frailtyHL package for fitting semi-parametric frailty models using hlikelihood. This package allows lognormal or gamma frailties for random-effect distribution, and it fits shared or multilevel frailty models for correlated survival data. Functions are provided to format and summarize the frailtyHL results. The estimates of fixed effects and frailty parameters and their standard ...

A maximum-likelihood method for fitting colour–magnitude diagrams

We present a maximum likelihood method for fitting two-dimensional model distributions to stellar data in colour-magnitude space. This allows one to include (for example) binary stars in an isochronal population. The method also allows one to derive formal uncertainties for fitted parameters, and assess the likelihood that a good fit has been found. We use the method to derive an age of 38.5 −6...

A Fitting Robot for Variational Analysis

∗Speaker. †We thank the Australian Partnership for Advanced Computing (APAC) and the South Australian Partnership for Advanced Computing (SAPAC) for generous grants of supercomputer time which have enabled this project. We also thank the University of Adelaide Faculty of Sciences for allowing us time on their CondorTMcycle-scavenging system. This work is supported by the Australian Research Cou...

A System for Footwear Fitting Analysis