The sinfo_utl_skycor recipe¶
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sinfo_utl_skycor
¶
Synopsis¶
Sky lines residuals correction
Description¶
This recipe perform a correction of possible sky line residuals in the object cube after standard data reduction.
Input frames are cubes with target and sky observations.
Their tags can be respectively OBS_OBJ (or OBS_PSF or OBS_STD) and OBS_SKY.
The output is a cube with same tag as the corresponding input target frame.
Constructor¶
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cpl.
Recipe
("sinfo_utl_skycor") Create an object for the recipe sinfo_utl_skycor.
import cpl
sinfo_utl_skycor = cpl.Recipe("sinfo_utl_skycor")
Parameters¶
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sinfo_utl_skycor.param.
skycor_mask_ws
¶ Starting wavelength for object-sky cross correlation (float; default: 1.4) [default=1.4].
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sinfo_utl_skycor.param.
skycor_mask_we
¶ End wavelength for object-sky cross correlation (float; default: 2.5) [default=2.5].
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sinfo_utl_skycor.param.
skycor_min_frac
¶ Threshold value for fraction of spatial pixels to be sky (float; default: 0.8) [default=0.8].
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sinfo_utl_skycor.param.
skycor_sky_bkg_filter_width
¶ Width of sky-thermal background pre filter (to remove emission lines before fitting a Black Body). (long; default: 12) [default=12].
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sinfo_utl_skycor.param.
skycor_line_hw
¶ Threshold value for full width in pixels of unresolved emission line. Lines with FWHM smaller than this value are not considered in the object-sky cross correlation and in computation of the optimal sky lines scaling factor (float; default: 4.0) [default=4.0].
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sinfo_utl_skycor.param.
skycor_scale_method
¶ Optimal sky lines scaling factor computation method: amoeba fit (0), maximum likelihood (1) (long; default: 1) [default=1].
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sinfo_utl_skycor.param.
skycor_rot_cor
¶ Computes scaling factor correction due to rotational levels transitions (bool; default: False) [default=False].
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sinfo_utl_skycor.param.
skycor_fit_obj_noise
¶ Do Gaussian fit of object noise (bool; default: False) [default=False].
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sinfo_utl_skycor.param.
skycor_niter
¶ Number of iterations of background fit (long; default: 10) [default=10].
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sinfo_utl_skycor.param.
skycor_pshift
¶ Sky spectrum shift towar object (float; default: 0.0) [default=0.0].
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sinfo_utl_skycor.param.
skycor_llx
¶ Lower left X defining object spectrum location (long; default: 1) [default=1].
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sinfo_utl_skycor.param.
skycor_lly
¶ Lower left Y defining object spectrum location (long; default: 1) [default=1].
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sinfo_utl_skycor.param.
skycor_urx
¶ Upper right X defining object spectrum location (long; default: 64) [default=64].
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sinfo_utl_skycor.param.
skycor_ury
¶ Upper right Y defining object spectrum location (long; default: 64) [default=64].
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sinfo_utl_skycor.param.
skycor_sub_thr_bkg_from_obj
¶ Subtract thermal background contribute from object spectra. Set it to TRUE if stack-sub_raw_sky is set to FALSE (bool; default: False) [default=False].
The following code snippet shows the default settings for the available parameters.
import cpl
sinfo_utl_skycor = cpl.Recipe("sinfo_utl_skycor")
sinfo_utl_skycor.param.skycor_mask_ws = 1.4
sinfo_utl_skycor.param.skycor_mask_we = 2.5
sinfo_utl_skycor.param.skycor_min_frac = 0.8
sinfo_utl_skycor.param.skycor_sky_bkg_filter_width = 12
sinfo_utl_skycor.param.skycor_line_hw = 4.0
sinfo_utl_skycor.param.skycor_scale_method = 1
sinfo_utl_skycor.param.skycor_rot_cor = False
sinfo_utl_skycor.param.skycor_fit_obj_noise = False
sinfo_utl_skycor.param.skycor_niter = 10
sinfo_utl_skycor.param.skycor_pshift = 0.0
sinfo_utl_skycor.param.skycor_llx = 1
sinfo_utl_skycor.param.skycor_lly = 1
sinfo_utl_skycor.param.skycor_urx = 64
sinfo_utl_skycor.param.skycor_ury = 64
sinfo_utl_skycor.param.skycor_sub_thr_bkg_from_obj = False
You may also set or overwrite some or all parameters by the recipe parameter param, as shown in the following example:
import cpl
sinfo_utl_skycor = cpl.Recipe("sinfo_utl_skycor")
[...]
res = sinfo_utl_skycor( ..., param = {"skycor_mask_ws":1.4, "skycor_mask_we":2.5})
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.
Copyright¶
This file is part of the SINFONI Instrument Pipeline Copyright (C) 2002,2003 European Southern Observatory
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Code author: Andrea Modigliani <Andrea.Modigliani@eso.org>