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class PeriodicScout( object )	[source]

Investigating scout for periodic models

PeriodicScout( )	[source]

findPeriod( days, flux, pmin=1, pmax=2, grid=1000, clip=2, verbose=0 )	[source]

Find period in eclipsing star data.

The search periods are defined as a geometric series, from pmin to pmax with NP points, where NP = int( grid * log10( pmax / pmin ) / math.log10( 2 ) ) That is grid points per octave from pmin to pmax.

Select eclipsing parts and find the minimum distance

Parameters

• days : array
       Julian days of observation
• flux : array
       measured flux
• pmin : float (1)
       smallest period to be considered
• pmax : float (2)
       largest period to be considered
• grid : int (1000)
       number of points per octave in pmin to pmax
• clip : float (2)
       select data below median flux minus clip * median abs deviants
• verbose : int
       0 : silent
       1 : not

downhill( days, flux, prs, scl, nrknots=20, tol=0.01, verbose=0 )	[source]

Search minimum chisq in a range of periods

Parameters

• days : array
       Julian days of observation
• flux : array
       measured flux
• prs : array
       list of periods
• scl : array
       pertaining scale of fit
• nrknots : int (20)
       number of knots in BasicSplinesModel
• tol : float (0.001)
       tolerance, stop criterion

findParameters( days, flux, period, verbose=False, plot=0 )	[source]

Return a first guess for the parameters eccentricity, phase, longitude

Parameters

• days : array
       time of observations
• flux : array
       flux of observations
• period : float
       the period (from findPeriod() )
• verbose : bool
       print some things
• plot : int
       0 dont plot
       1 plot and show the results
       2 plot but dont show the results

findRadius( time, yfit, kmin, ymed )	[source]

Find the radius of a star from the eclips duration

Parameters

• time : array
       time values of yfit
• yfit : array
       splines fit to the clipsing data
• kmin : int
       index of (local) minimum in yfit
• ymed : float
       median value of yfit