PixelFitter

class higal_sedfitter.fit.PixelFitter(tguess=20, bguess=1.75, nguess=1e+22, trange=[2.73, 50], brange=[1, 3], nrange=[1e+20, 1e+25], tfixed=False, bfixed=False, nfixed=False)

Bases: object

Initialize an SED fitter instance with a set of guesses. The input parameters follow a template that is the same for each of temperature, beta, and column.

Once initialized, PixelFitter can be called as a function of frequency (Hz), flux (MJy), and error (MJy)

Parameters:

guess : float

The guessed value for T,N, or beta. Temperature in Kelvin, column in \(cm^{-2}\)

range : tuple or list of length 2

The minimum/maximum values of each parameter

fixed : bool

Is the parameter fixed at the guessed value?

Methods Summary

__call__(frequency, flux, err)	Perform the fit and return a tuple of values & errors
integral(fmin, fmax)	Compute the integral of the currently-fitted parameters

Methods Documentation

__call__(frequency, flux, err)

Perform the fit and return a tuple of values & errors

Parameters:

frequency : Quantity

An array of frequencies to be converted to Hz and passed to the fitter

flux : Quantity

An array of u.MJy equivalent flux values

err : Quantity

An array of u.MJy equivalent flux values that specify the errors on flux

integral(fmin, fmax)

Compute the integral of the currently-fitted parameters

Parameters:

fmin, fmax : Quantity

Frequency-equivalent start and end points for the integral

Returns:

The SED integrated in units of

bbunit = u.erg/u.s/u.cm**2