MuonIntensityFitter#

class ctapipe.image.MuonIntensityFitter(**kwargs: Any)[source]#

Fit muon ring images with a theoretical model to estimate optical efficiency.

The image prediction function is currently modeled after [CCdNT13].

For more information, also see [GFM+19].

Attributes Summary

`hole_radius_m`	The radius of the hole in the center of the primary mirror dish in meters.The hole is not circular in shape; however, it can be well approximated as a circle with the same area.It is defined with the flat-to-flat distance (LST: 1.51 m, MST: 1.2 m, SST: 0.78 m).We approximate the hexagonal hole with a circle that has the same surface area.
`max_lambda_m`	Minimum wavelength for Cherenkov light in m.
`min_lambda_m`	Minimum wavelength for Cherenkov light in m.
`oversampling`	Oversampling for the line integration.
`spe_width`	Width of a single photo electron distribution.

Methods Summary

__call__(tel_id, center_x, center_y, radius, ...)

Attributes Documentation

hole_radius_m#: The radius of the hole in the center of the primary mirror dish in meters.The hole is not circular in shape; however, it can be well approximated as a circle with the same area.It is defined with the flat-to-flat distance (LST: 1.51 m, MST: 1.2 m, SST: 0.78 m).We approximate the hexagonal hole with a circle that has the same surface area.

Methods Documentation

__call__(tel_id, center_x, center_y, radius, image, pedestal, mask=None)[source]#

Parameters:

tel_id: int: the telescope id
center_x: Angle quantity: Initial guess for muon ring center in telescope frame
center_y: Angle quantity: Initial guess for muon ring center in telescope frame
radius: Angle quantity: Initial guess for muon ring radius in telescope frame
image: ndarray: Amplitude of image pixels
pedestal: ndarray: Pedestal standard deviation in each pixel
mask: ndarray: mask marking the pixels to be used in the likelihood fit

Returns: