target.stars

This module defines StableTarget and Star, representing time-independent point sources such as stars.

class skysurvey.target.stars.StableTarget

Bases: Target

A class to model targets with fixed, time-independent properties.

Parameters:

• _KIND (str) – The transient type. Default is "stable".

• _MODEL (dict) –

  The model to use. The default is a dictionary with the following keys:

  • radec: The ra and dec of the target.

  • magobs: Randomly drawn observed magnitudes of the target, using random_magobs().

static random_magobs(size=None, zpmax=22.5, scale=3, rng=None)

Draw random observed magnitudes from an exponential decay distribution.

Parameters:

• size (int, optional) – Number of magnitudes to draw. Default is None.

• zpmax (float, optional) – Upper magnitude limit. Default is 22.5.

• scale (float, optional) – Scale parameter of the exponential distribution. Default is 3.

• rng (None, int, or (Bit)Generator, optional) – Seed for the random number generator. Default is None.

Returns:

Randomly drawn observed magnitudes.

Return type:

array

class skysurvey.target.stars.Star

Bases: StableTarget

A class to model stars, modelled as a stable point source.

Parameters:

_KIND (str) – The transient type. Default is "star".