Peranso is the leading light curve and period analysis software in astronomy. It offers a complete set of powerful light curve and period analysis functions to work with large, multi-night astronomical data sets, collected by a variety of observers. It is equally effective for the individual observer, who wants to analyze his observations of one or more nights.

Substantial attention has been given to ease-of-use and data accuracy, making Peranso the most productive period or time series analysis software on the market. Peranso lets you take control of your data analysis. Forget intimidating manuals and complex commands - powerful light curve and period analysis capabilities are now within your reach. Click here for an overview of Peranso's product features.
We are shipping Peranso 2.60
Download instructions (including a trial version) are available here. Check the Revision History to learn about the new features in this release.

Registration is required to activate Peranso for use on your personal computer. Peranso is distributed as shareware.
Before downloading the software, you might want to take a look at the extensive Peranso User Manual, available as a PDF document, and as online help. Over 190 pages, with more than 100 illustrations. Convince your-self of the power of Peranso !

Now also available in French language!
Windows 10 support
Peranso 2.60 features full Windows 10 compatibi-lity.
Peranso 2.11 features the Planetary Transit AoV method, a brand new and very efficient method to search for planetary transits in stellar light curves, invented by A. Schwarzenberg-Czerny.
       Transit AoV
   Phase Binned AoV
Peranso 2.10 features the Phase Binned AoV (Analysis of Variance) period analysis method, designed by A. Schwar-zenberg-Czerny.
This method is com-monly used by professio-nal astronomers on a wide variety of variable stars.
Peranso 2.0 boosts many new product features and greatly enhances existing functions. Asteroid light curve work got a strong focus, through (1) the addition of Dr. Alan Harris' [JPL] famous Fourier Analysis method, (2) the ability to plot and use magnitude error bars in period analysis routines, (3) the ability to set the base time for period calculations in hours (instead of days, which is more common for variable star research).
      FALC method
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Light Curve and Period Analysis Software

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Further literature

For an excellent introduction to time-series analysis, we refer to the book "Analyzing Light Curves, a practical guide" by Grant Foster (
Peranso 2.60 features full Windows 10 compatibi-lity.
  Exoplanet transits
Peranso 1.33 features the EEBLS method (Kovacs, 2002). This is a box-fitting algorithm  to search for exoplanet transits in survey data.
Although Peranso has been developed as a Microsoft Windows product, several end users are running Peranso successfully on other operating systems too, using appropriate Windows emulation software (also called desktop virtualization software) :
On Apple MacBook computers, we advise to use Parallels Desktop For Mac or the WINE emulator (free of charge), which delivers very good performance in combination with Peranso.
On Linux systems, we advise VMWare Player (free of charge) or the WINE emulator (free of charge), which has been reported to run Peranso flawlessly on Ubuntu.
Light Curve and Period Analysis Software
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Author: Tonny Vanmunster
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We are thrilled to announce that Peranso 3.0 will be released by end of December. We are gradually converting this website to become ready for the release. During this transition period, you will find a mix of Peranso 2.x and Peranso 3.0 contents. We apologize for the inconveniences this creates. You can have a look at the new Peranso 3 features here, see what's new compared to Peranso 2, or start reading the new User Guide (contents are gradually released).

Meanwhile, you are still able to buy Peranso 2.6 licenses. Moreover, Peranso 3.0 will be available free of charge to all customers who purchased a Peranso 2.x license after December 1st, 2019. Details about the new Peranso 3.0 pricing strategy and licensing model will be shared as we move closer to the release date.
  Create with one-mouse-click a light curve of AAVSO, ASAS or ZTF observations

  Study the period evolution of a Mira variable over the range of a century

  Auto-detect multi periodicities in a Delta Scuti or RV Tauri type variable star

  Discover an exoplanet transit in TESS light curves

  Find the rotation period of a Near-Earth Asteroid

  Detect the orbital period of an Algol-type eclipsing binary

  Find the spin period of the Crab nebula pulsar in over 600,000 XMM-Newton observations

  Select from 17 different period analysis methods to study periodicities in light curves

  Automatically remove outlier observations from light curves

For all of the above challenges, and many more, you will find a fully worked out Tutorial
in the new Peranso 3 User Guide.