danhey / periodogram

A simple, tested Python package for making periodograms on Kepler/TESS time series.

Periodogram

Simple and tested periodogram normalizations for astronomical time-series

Installation

pip install periodogram

Usage

There are three types of normalizations available. The amplitude spectrum is normalized such that a sine wave of amplitude 1 will have a peak amplitude of 1. The power spectrum will have 1^2, and the power spectral density will have 1^2 * Tobs

from periodogram import Periodogram

p = Periodogram.calculate(x, y, normalization='amplitude')
p.plot()

Lower-level functions for directly calculating different normalizations are also available

from periodogram import amplitude_spectrum, psd, power_spectrum

frequency, amplitude = amplitude_spectrum(x, y)