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Product Features

Peranso includes these powerful features :
bullet An extensive set of period analysis methods to detect periodicities in variable star and asteroid time-series data : Lomb-Scargle, Bloomfield,  Discrete Fourier Transform DFT (Deeming), Date Compensated Discrete Fourier Transform DCDFT (Ferraz-Mello), CLEANest (Foster), Jurkewich, PDM (Phase Dispersion Minimization), Dworetsky, Renson, Analysis of Variance ANOVA (Schwarzenberg-Czerny), Phase-binned AoV (Schwarzenberg-Czerny), Lafler-Kinman, EEBLS (Kovacs) for exoplanet transits, FALC

ANOVA period window

bullet Multiple windows to display observation sets, period diagrams, phase diagrams, etc.  Each observation set is drawn in a distinctive color, that is consistently used throughout all related windows. 

Top left : Observation window, top right : notepad, 
bottom left : Period window, bottom right : Phase window.

bullet Powerful data analysis functions for averaging, detrending, heliocentric correction, curve fitting, etc.  

Observation window with trendline. A separate dialog box shows more detailed information.

bullet A unique Lightcurve Workbench for advanced light curve analysis, comprising functions for data reduction (binning), polynomial fitting, extremum finding, etc.

Binning applied to an Observation window showing a transit of exoplanet TrES-1

User controlled "prewhitening" routine for elimination of aliases and confirmation of secondary periods.  
Particularly effective multi-periodic analysis function using the CLEANest / SLICK method by Grant Foster. 

 CLEANest WorkBench conveniently grouping all CLEANest operations in one dialog box

Model Function to visualize how selected frequencies/periods fit the observations (CLEANest method).
Display the residuals that result from subtracting a Model Function from the observations (CLEANest method).

Observation window with Model Function and Residulas.

bullet Analyse photometric time series in search for periodic transits by exoplanets, using the EEBLS (Edge Enhanced Box-fitting Least Squares) method by Kovacs. Calculate and visualize the EEBLS frequency spectrum, fold the time series over the most significant EEBLS period, calculate the epoch of mid-transit events, the transit depth and duration, graphically display the fit obtained by the EEBLS method. Or use the Planetary Transit AoV method, a brand new and very efficient transit detection method, invented by A. Schwarzenberg-Czerny.

Phase window with EEBLS fit (red curve) for exoplanet OGLE-TR-111

Use Tingley's Exoplanet Diagnostic, to calculate how "planet-like" a transit event is, using only the transit period, duration and depth. It is integrated in Peranso's EEBLS method.
Period determination of eclipsing Algol-type (EA) binaries using the EASolver method (Wils). It works on photometric survey data with only few observations showing the variable in faint state.
Determination of period error values (uncertainties) based on a method by Schwarzenberg-Czerny.  
Sophisticated calculation of False Alarm Probabilities to determine the period significances, using a Fisher Randomization method (Monte Carlo permutations).  

False Alarm Probabilities are calculated using the Fisher Randomization method

bullet Extremum finding based on (a) the Kwee-van Woerden algorithm, or (b) local minima/maxima determination through polynomial fitting.  

The Kwee-van Woerden method is used to find extrema in all Peranso windows.
Simply mark the area of interest in a graphical way and hit the 'Calculate' button.


bullet Handles datasets of >300.000 observations (and probably even much more).   
bullet Temporary deactivate observations and study the impact on your period analysis results  
bullet Swiftly import observations from Microsoft Excel™, Microsoft Word™, AIP4WIN™ v1 & v2, AAVSO, ASAS (All Sky Automated Survey), NSVS (Northern Sky Variability Survey) and other file formats, including coma-delimited (CSV) files. Full support of the Windows Clipboard.  

Time-series data can be imported in Peranso through the Clipboard, 
or from a variety of file formats. During import, one can already
apply heliocentric and other data corrections.


bullet Powerful data and image export capabilities (to file or to clipboard)   
bullet "One-Button-Save" to store all analysis windows on disk and continue your work in identical conditions at a later stage  
bullet Toolbars, cursors and indicators let you select dominant periods, indicate intervals for refinement of your period analysis, etc    
bullet Easy navigation bar to step through and zoom in on observation sets   
bullet Fully customizable windows : axes, grids, window annotation, trendlines, colors, etc.

Peranso has several Properties dialog boxes to tune parameters and appearances



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