ecpi.process.imag.core.source_finder module
Section author: ECLAIRs GP team
Methods to find sources in the sky image
Reference
- class MaxSourceFinder(sky_count, sky_snr, fit_method=<function gaussian_2d_2width_offset>, fit_sigma=1.155, subimage_size=10, image_margins=0)[source]
Bases:
objectSky source finder, based on the best excess in the SNR image
- change_sky(sky_count, sky_snr)[source]
re-configure the MaxSourceFinder with a new sky
- Parameters
sky_count (2D array) – sky image to loo for sources in
sky_snr (2D array) – sky snr image
- fit_source(snr_min, peak_position=None, show=None, verbose=None)[source]
Finds the source using the SkySNR and SkyCount images
look for the best excess in the SkySNR map.
select a region around the source in the SkyCount image to do the fit (+-10 pixels)
perform a 2D-Gaussian fit to get the final location of the source
fit results in self.params = [height_fit, x_pos_fit, y_pos_fit, sigma_x_fit, sigma_y_fit]
- Parameters
snr_min – snr limit for the source research
peak_position – position of the peak to be fitted,
if already known. [pix_y, pix_z]. Default=None :param show: show fit plot :param verbose: print statement feedback :type snr_min: float (>0) :type peak_position: [float, float] :type show: string (‘2d’ or ‘3d’ or default=None) :type verbose: bool (default=None)
- Variables
success – 0
- fit_source_position(show=None)[source]
fit a gaussian 2D on a sky portion around the source
sky portion = subimage_size around the source
If the fitted peak position is out of the sky portion, the fit is considered as a failure.
fit params are save in sky image pixel coordinates
- Parameters
show (string) – plot the sky portion in ‘2d’ or in ‘3d’. Default=None.