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The sinfo_rec_mflat recipe

sinfo_rec_mflat

Synopsis

Master flat determination

Description

This recipe reduce normal raw flat fields.

The input files are a set of flat fields with tag FLAT_LAMP optionally one may have in input also several bad pixel maps to be coadded.

The main products are a master flat field (PRO.CATG=MASTER_FLAT_LAMP) image a bad pixel map (PRO.CATG=BP_MAP_NO), a master bad pixel map (PRO.CATG=MASTER_BP_MAP) resulting by the coaddition of all bad pixel maps.

Constructor

cpl.Recipe("sinfo_rec_mflat")

Create an object for the recipe sinfo_rec_mflat.

import cpl
sinfo_rec_mflat = cpl.Recipe("sinfo_rec_mflat")

Parameters

sinfo_rec_mflat.param.gen_overpar

Overwrite DRS ini parameters: (bool; default: True) [default=True].

sinfo_rec_mflat.param.lc_sw

Correct for bad lines introduced by instrument software: (bool; default: False) [default=False].

sinfo_rec_mflat.param.lc_kappa

Kappa sigma value (long; default: 18) [default=18].

sinfo_rec_mflat.param.lc_filt_rad

Filtering radii applied during median filter. Should be small (long; default: 3) [default=3].

sinfo_rec_mflat.param.product_density

Density of pipeline products: 0 (low), 1 (low+skycor), 2 (med-QC), 3 (high-debug+skycor) (long; default: 2) [default=2].

sinfo_rec_mflat.param.bp_norm_s_factor

Threshold Sigma Factor: to remove the column intensity tilt only pixels which lie within a defined noiselimit are used to fit a straight line (float; default: 5.0) [default=5.0].

sinfo_rec_mflat.param.bp_norm_method_ind

Bad pixel Method Index1: median of nearest neighbors,2: absolute distances check, 3: mean of nearest spectral neighbors (long; default: 1) [default=1].

sinfo_rec_mflat.param.bp_norm_fct

Factor: if |pixel - median| > factor * standard deviation -> then the pixel value is replaced by the median of the 8 nearest neighbors (float; default: 10.0) [default=10.0].

sinfo_rec_mflat.param.bp_norm_it

Iterations: number of iterations to of median filtering to find bad pixel clusters (long; default: 8) [default=8].

sinfo_rec_mflat.param.bp_norm_lo_rej

low_rejection: percentage of rejected low intensity pixels before averaging (float; default: 0.1) [default=0.1].

sinfo_rec_mflat.param.bp_norm_hi_rej

high_rejection: percentage of rejected high intensity pixels before averaging (float; default: 0.1) [default=0.1].

sinfo_rec_mflat.param.bp_norm_llx

llx: to compute image statistics on a rectangularzone of the image the coordinates of the rectangle are needed:lower left x coordinate (long; default: 270) [default=270].

sinfo_rec_mflat.param.bp_norm_lly

lly: to compute image statistics on a rectangularzone of the image the coordinates of the rectangle are needed:lower left y coordinate (long; default: 1000) [default=1000].

sinfo_rec_mflat.param.bp_norm_urx

urx: to compute image statistics on a rectangularzone of the image the coordinates of the rectangle are needed:upper right x coordinate (long; default: 310) [default=310].

sinfo_rec_mflat.param.bp_norm_ury

ury: to compute image statistics on a rectangularzone of the image the coordinates of the rectangle are needed:upper right y coordinate (long; default: 1200) [default=1200].

sinfo_rec_mflat.param.bp_norm_thr_ind

Threshold Index: indicator that indicates if the values beyond a threshold deviation from the mean are flagged as bad pixels (bool; default: True) [default=True].

sinfo_rec_mflat.param.bp_norm_mean_fct

Mean Factor: factor to the clean standard deviation to define the threshold deviation from the clean mean (float; default: 100.0) [default=100.0].

sinfo_rec_mflat.param.bp_norm_min_cut

the minimum value of real data (float; default: 0.0) [default=0.0].

sinfo_rec_mflat.param.bp_norm_max_cut

the minimum value of real data (float; default: 50000.0) [default=50000.0].

sinfo_rec_mflat.param.lamp_flats_lo_rej

lower rejection: percentage of rejected low intensity pixels before averaging (float; default: 0.1) [default=0.1].

sinfo_rec_mflat.param.lamp_flats_hi_rej

high rejection: percentage of rejected high intensity pixels before averaging (float; default: 0.1) [default=0.1].

sinfo_rec_mflat.param.lamp_flats_interpol_index

Interpolation index switch: indicator if the bad pixels of the flatfield should be interpolated (bool; default: False) [default=False].

sinfo_rec_mflat.param.lamp_flats_max_rad

Max Rad: maximal pixel distance from bad pixel to take valid pixels (long; default: 4) [default=4].

sinfo_rec_mflat.param.lamp_flats_bad_ind

indicator if a bad pixel mask should be generated or not (bool; default: False) [default=False].

sinfo_rec_mflat.param.lamp_flats_sigma_factor

Sigma Factor: factor of the sigma noise limit; to remove the column intensity tilt only pixels which lie within a defined noise limit are used to fit a straight line (float; default: 5.0) [default=5.0].

sinfo_rec_mflat.param.lamp_flats_factor

Factor: if |pixel - median| > factor * standard deviation -> then the pixel value is replaced by the median of the 8 nearest neighbors (float; default: 3.0) [default=3.0].

sinfo_rec_mflat.param.lamp_flats_iterations

Iterations: number of iterations to of median filtering to find bad pixel clusters (long; default: 8) [default=8].

sinfo_rec_mflat.param.lamp_flats_bad_lo_rej

low rejection: Percentage for bad pixel low rejection (float; default: 10.0) [default=10.0].

sinfo_rec_mflat.param.lamp_flats_bad_hi_rej

high rejection: Percentage for bad pixel high rejection (float; default: 10.0) [default=10.0].

sinfo_rec_mflat.param.lamp_flats_llx

Lower Lext X corner (long; default: 1350) [default=1350].

sinfo_rec_mflat.param.lamp_flats_lly

Lower Lext Y corner (long; default: 1000) [default=1000].

sinfo_rec_mflat.param.lamp_flats_rrx

Upper right X corner (long; default: 1390) [default=1390].

sinfo_rec_mflat.param.lamp_flats_ury

Upper right Y corner (long; default: 1200) [default=1200].

sinfo_rec_mflat.param.lamp_flats_tresh_ind

Treshold index: (bool; default: False) [default=False].

sinfo_rec_mflat.param.lamp_flats_mean_factor

Mean Factor: factor to the clean standard deviation to define the threshold deviation from the clean mean (float; default: 10.0) [default=10.0].

sinfo_rec_mflat.param.lamp_flats_qc_fpn_xmin1

qc_fpn_xmin1 (long; default: 512) [default=512].

sinfo_rec_mflat.param.lamp_flats_qc_fpn_xmax1

qc_fpn_xmax1 (long; default: 1536) [default=1536].

sinfo_rec_mflat.param.lamp_flats_qc_fpn_ymin1

qc_fpn_ymin1 (long; default: 512) [default=512].

sinfo_rec_mflat.param.lamp_flats_qc_fpn_ymax1

qc_fpn_ymax1 (long; default: 1536) [default=1536].

sinfo_rec_mflat.param.lamp_flats_qc_fpn_xmin2

qc_fpn_xmin2 (long; default: 1350) [default=1350].

sinfo_rec_mflat.param.lamp_flats_qc_fpn_xmax2

qc_fpn_xmax2 (long; default: 1390) [default=1390].

sinfo_rec_mflat.param.lamp_flats_qc_fpn_ymin2

qc_fpn_ymin2 (long; default: 1000) [default=1000].

sinfo_rec_mflat.param.lamp_flats_qc_fpn_ymax2

qc_fpn_ymax2 (long; default: 1200) [default=1200].

sinfo_rec_mflat.param.lamp_flats_qc_thresh_min

qc_thresh_min (long; default: 0) [default=0].

sinfo_rec_mflat.param.lamp_flats_qc_thresh_max

qc_thresh_max (long; default: 49000) [default=49000].

The following code snippet shows the default settings for the available parameters.

import cpl
sinfo_rec_mflat = cpl.Recipe("sinfo_rec_mflat")

sinfo_rec_mflat.param.gen_overpar = True
sinfo_rec_mflat.param.lc_sw = False
sinfo_rec_mflat.param.lc_kappa = 18
sinfo_rec_mflat.param.lc_filt_rad = 3
sinfo_rec_mflat.param.product_density = 2
sinfo_rec_mflat.param.bp_norm_s_factor = 5.0
sinfo_rec_mflat.param.bp_norm_method_ind = 1
sinfo_rec_mflat.param.bp_norm_fct = 10.0
sinfo_rec_mflat.param.bp_norm_it = 8
sinfo_rec_mflat.param.bp_norm_lo_rej = 0.1
sinfo_rec_mflat.param.bp_norm_hi_rej = 0.1
sinfo_rec_mflat.param.bp_norm_llx = 270
sinfo_rec_mflat.param.bp_norm_lly = 1000
sinfo_rec_mflat.param.bp_norm_urx = 310
sinfo_rec_mflat.param.bp_norm_ury = 1200
sinfo_rec_mflat.param.bp_norm_thr_ind = True
sinfo_rec_mflat.param.bp_norm_mean_fct = 100.0
sinfo_rec_mflat.param.bp_norm_min_cut = 0.0
sinfo_rec_mflat.param.bp_norm_max_cut = 50000.0
sinfo_rec_mflat.param.lamp_flats_lo_rej = 0.1
sinfo_rec_mflat.param.lamp_flats_hi_rej = 0.1
sinfo_rec_mflat.param.lamp_flats_interpol_index = False
sinfo_rec_mflat.param.lamp_flats_max_rad = 4
sinfo_rec_mflat.param.lamp_flats_bad_ind = False
sinfo_rec_mflat.param.lamp_flats_sigma_factor = 5.0
sinfo_rec_mflat.param.lamp_flats_factor = 3.0
sinfo_rec_mflat.param.lamp_flats_iterations = 8
sinfo_rec_mflat.param.lamp_flats_bad_lo_rej = 10.0
sinfo_rec_mflat.param.lamp_flats_bad_hi_rej = 10.0
sinfo_rec_mflat.param.lamp_flats_llx = 1350
sinfo_rec_mflat.param.lamp_flats_lly = 1000
sinfo_rec_mflat.param.lamp_flats_rrx = 1390
sinfo_rec_mflat.param.lamp_flats_ury = 1200
sinfo_rec_mflat.param.lamp_flats_tresh_ind = False
sinfo_rec_mflat.param.lamp_flats_mean_factor = 10.0
sinfo_rec_mflat.param.lamp_flats_qc_fpn_xmin1 = 512
sinfo_rec_mflat.param.lamp_flats_qc_fpn_xmax1 = 1536
sinfo_rec_mflat.param.lamp_flats_qc_fpn_ymin1 = 512
sinfo_rec_mflat.param.lamp_flats_qc_fpn_ymax1 = 1536
sinfo_rec_mflat.param.lamp_flats_qc_fpn_xmin2 = 1350
sinfo_rec_mflat.param.lamp_flats_qc_fpn_xmax2 = 1390
sinfo_rec_mflat.param.lamp_flats_qc_fpn_ymin2 = 1000
sinfo_rec_mflat.param.lamp_flats_qc_fpn_ymax2 = 1200
sinfo_rec_mflat.param.lamp_flats_qc_thresh_min = 0
sinfo_rec_mflat.param.lamp_flats_qc_thresh_max = 49000

You may also set or overwrite some or all parameters by the recipe parameter param, as shown in the following example:

import cpl
sinfo_rec_mflat = cpl.Recipe("sinfo_rec_mflat")
[...]
res = sinfo_rec_mflat( ..., param = {"gen_overpar":True, "lc_sw":False})

See also

cpl.Recipe for more information about the recipe object.

Bug reports

Please report any problems to Andrea Modigliani. Alternatively, you may send a report to the ESO User Support Department.