GlobalPeakWindowSum

class ctapipe.image.GlobalPeakWindowSum(**kwargs: Any)

Bases: ctapipe.image.extractor.ImageExtractor

Extractor which sums in a window about the peak from the global average waveform.

To reduce the influence of noise pixels, the average can be calculated only on the pixel_fraction brightest pixels. The “brightest” pixels are determined by sorting the waveforms by their maximum value.

Attributes Summary

apply_integration_correction	Apply the integration window correction.
pixel_fraction	Fraction of pixels to use for finding the integration window.
window_shift	Define the shift of the integration window from the peak_index (peak_index - shift).
window_width	Define the width of the integration window.

Methods Summary

__call__(waveforms, tel_id, …)

Call the relevant functions to fully extract the charge and time for the particular extractor.

Attributes Documentation

apply_integration_correction

Apply the integration window correction.

pixel_fraction

Fraction of pixels to use for finding the integration window. By default, the full camera is used. If fraction is smaller 1, only the brightest pixels will be averaged to find the peak position.

window_shift

Define the shift of the integration window from the peak_index (peak_index - shift).

window_width

Define the width of the integration window.

Methods Documentation

__call__(waveforms, tel_id, selected_gain_channel, broken_pixels) → ctapipe.containers.DL1CameraContainer

Call the relevant functions to fully extract the charge and time for the particular extractor.

Parameters

waveformsndarray

Waveforms stored in a numpy array of shape (n_pix, n_samples).

tel_idint

The telescope id. Used to obtain to correct traitlet configuration and instrument properties

selected_gain_channelndarray

The channel selected in the gain selection, per pixel. Required in some cases to calculate the correct correction for the charge extraction.

Returns

DL1CameraContainer:

extracted images and validity flags