Create the master bias frame
This recipe creates a master bias frame by computing the median of all input bias frames.
Create an object for the recipe xsh_mbias.
import cpl
xsh_mbias = cpl.Recipe("xsh_mbias")
If ‘no’, temporary files are deleted. (str; default: ‘no’) [default=”no”].
Additional xshooter debug level. One of ‘none’, ‘low’, ‘medium’, ‘high’ (str; default: ‘none’) [default=”none”].
Add timestamp to product file name. (bool; default: False) [default=False].
Integer representation of the bits to be considered bad when decoding the bad pixel mask pixel values. Most frequent codes relevant for the user: 0: good pixel, 8: pick-up noise, 16: cosmic-ray removed, 32: cosmic-ray unremoved, 128: calibration file defect, 256: hot pixel, 512: dark pixel, 4096: A/D converted saturation, 32768: non linear pixel, 1048576: extrapolated flux in NIR, 4194304: Interpolated flux during extraction. (long; default: 2144337919) [default=2144337919].
Method used to build master frame. (str; default: ‘median’) [default=”median”].
Kappa used to clip low level values, when method is set to ‘mean’ (float; default: 5.0) [default=5.0].
Kappa used to clip high level values, when method is set to ‘mean’ (float; default: 5.0) [default=5.0].
Lower left reference area X coordinate for Fixed Pattern Noise computation (long; default: 10) [default=10].
Lower left reference area Y coordinate for Fixed Pattern Noise computation (long; default: 10) [default=10].
Upper right reference area X coordinate for Fixed Pattern Noise computation (long; default: 1024) [default=1024].
Upper right reference area Y coordinate for Fixed Pattern Noise computation (long; default: 1024) [default=1024].
Sample size for Fixed Pattern Noise computation (long; default: 10) [default=10].
Number of sampling points for Fixed Pattern Noise computation (long; default: 100) [default=100].
RON computation method (str; default: ‘ALL’) [default=”ALL”].
Region X size for random computation (long; default: 10) [default=10].
Number of random samples (long; default: 100) [default=100].
Lower left X of reference region (long; default: -1) [default=-1].
Lower left Y of reference region (long; default: -1) [default=-1].
Upper right X of reference region (long; default: -1) [default=-1].
Upper right Y of reference region (long; default: -1) [default=-1].
Lower left X of reference region (long; default: -1) [default=-1].
Lower left Y of reference region (long; default: -1) [default=-1].
Upper right X of reference region (long; default: -1) [default=-1].
Upper right Y of reference region (long; default: -1) [default=-1].
Lower value of kappa-sigma clip in stacking (long; default: 3) [default=3].
Number of iterations in kappa-sigma clip in stacking (long; default: 25) [default=25].
Reference X value to compute structure (long; default: -1) [default=-1].
Reference Y value to compute structure (long; default: -1) [default=-1].
The following code snippet shows the default settings for the available parameters.
import cpl
xsh_mbias = cpl.Recipe("xsh_mbias")
xsh_mbias.param.keep_temp = "no"
xsh_mbias.param.debug_level = "none"
xsh_mbias.param.time_stamp = False
xsh_mbias.param.decode_bp = 2144337919
xsh_mbias.param.stack_method = "median"
xsh_mbias.param.klow = 5.0
xsh_mbias.param.khigh = 5.0
xsh_mbias.param.fpn_llx = 10
xsh_mbias.param.fpn_lly = 10
xsh_mbias.param.fpn_urx = 1024
xsh_mbias.param.fpn_ury = 1024
xsh_mbias.param.fpn_hsize = 10
xsh_mbias.param.fpn_nsamples = 100
xsh_mbias.param.ron_method = "ALL"
xsh_mbias.param.random_sizex = 10
xsh_mbias.param.random_nsamples = 100
xsh_mbias.param.ref1_llx = -1
xsh_mbias.param.ref1_lly = -1
xsh_mbias.param.ref1_urx = -1
xsh_mbias.param.ref1_ury = -1
xsh_mbias.param.ref2_llx = -1
xsh_mbias.param.ref2_lly = -1
xsh_mbias.param.ref2_urx = -1
xsh_mbias.param.ref2_ury = -1
xsh_mbias.param.stacking_ks_low = 3
xsh_mbias.param.stacking_ks_iter = 25
xsh_mbias.param.struct_refx = -1
xsh_mbias.param.struct_refy = -1
You may also set or overwrite some or all parameters by the recipe parameter param, as shown in the following example:
import cpl
xsh_mbias = cpl.Recipe("xsh_mbias")
[...]
res = xsh_mbias( ..., param = {"keep_temp":"no", "debug_level":"none"})
See also
cpl.Recipe for more information about the recipe object.
Please report any problems to P.Goldoni, L.Guglielmi, R. Haigron, F. Royer, D. Bramich, A. Modigliani. Alternatively, you may send a report to the ESO User Support Department.
This file is part of the X-shooter Instrument Pipeline Copyright (C) 2006 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: P.Goldoni, L.Guglielmi, R. Haigron, F. Royer, D. Bramich, A. Modigliani <amodigli@eso.org>