satlas.profiles.Crystalball

class satlas.profiles.Crystalball(fwhm=None, mu=None, amp=None, alpha=None, n=None, ampIsArea=False)

A callable Crystalball profile.

__init__(fwhm=None, mu=None, amp=None, alpha=None, n=None, ampIsArea=False)

Creates a callable object storing the fwhm, amplitude and location of a Crystalball lineshape. For more information, see [Gai82] and [Skw86]

Parameters:

• fwhm (float) – Full Width At Half Maximum, defaults to 1.
• mu (float) – Location of the center, defaults to 0.
• amp (float) – Amplitude of the profile, defaults to 1.
• alpha (float) – Location of the tail.
• n (float) – Relative amplitude of the tail.
• ampIsArea (boolean) – Sets if the amplitude is the integral or the peakheight. Defaults to False.

Returns:

Callable instance, evaluates the Crystalball profile in the arguments supplied.

Return type:

Crystalball

__call__(x)

Evaluates the lineshape in the given values.

Parameters:vals (array_like) – Array of values to evaluate the lineshape in. Returns:Array of seperate response values of the lineshape. Return type:array_like

Methods

__init__([fwhm, mu, amp, alpha, n, ampIsArea])

Creates a callable object storing the fwhm, amplitude and location of a Crystalball lineshape.

Attributes

alpha
amp	Peak amplitude.
ampIsArea	Boolean controlling the behaviour of amp.
fwhm	FWHM of the peak.
mu
n