ProfilesΒΆ

Profiles module consists of classes and functions neccessary to reproduce the plots from Bektesevic & Vinkovic et. al. 2017 (arxiv: 1707.07223).

The module provides classes for various different types of object brightness profiles (PointSource, GaussianSource, DiskSource, RabinaSource), seeing (Gaus- Kolmogorov), and defocusing effects (FluxPerAngle).

Sources represent 1D integrated brightness profiles of different source distributions as well as various parameters describing these distributions (such as FWHM, width, distance from instrument, variance etc.) in a common lookalike interface. They usually carry with them their resolution, scale or units (units are more for personal reference than actually useful).

Convolving Sources with Seeing and/or Defocus profile produce a new Source, which brightness profile corresponds to that of an source which is affected by these efects. So a convolution of a PointSource and seeing represents a source in focus observed through an atmoshere and PointSource convolved with Defocus corresponds to a defocused point source in ideal seeing (no seeing effects) etc

The module also provides a light wrapper around plotting utilities in matplotlib (but this is by no means extensive).

Examples

from lfd.analysis import profiles

point = profiles.PointSource(100)
seeing = profiles.GausKolmogorov(profiles.SDSSSEEING)
defocus = profiles.FluxPerAngle(100, *profiles.SDSS)

a = profiles.convolve(point, seeing, defocus)

import matplotlib.pyplot as plt
fig, ax = plt.subplots(1, 1)
profiles.plot_profiles(ax, (point, seeing, defocus, a))
plt.legend()
plt.show()