Create the orders centre traces table file
This recipe creates the orders centre traces table.
Prepare PRE structures.
For NIR, subtract NIR-OFF from NIR-ON.
For UVB and NIR, Substract the master Bias and master dark.
Detect Orders and calculate the order table.
An updated Order Table, PRO.CATG=ORDER_TABLE_CENTR_arm.
A order trace residuals Table, PRO.CATG=ORDERPOS_RESID_TAB_arm.
The order pos frame bias subtracted, PRO.CATG=ORDERDEF_ON_arm.
Create an object for the recipe xsh_orderpos.
import cpl
xsh_orderpos = cpl.Recipe("xsh_orderpos")
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].
pre-overscan correction.0: no correction1: mean overscan correction2: mean prescan correction3: (mean pre+mean overscan)/2 correction (long; default: 1) [default=1].
Half window size in pixels for the 1D box to search for the maximum in the cross-dispersion profile (long; default: 5) [default=5].
Half window size for the running median box during the search for the maximum in the cross-dispersion profile (long; default: 0) [default=0].
Half window size for the fit of the cross-dispersion profile (long; default: 5) [default=5].
Threshold factor applied to check that the flux at the fitted peak is higher than error. (float; default: 0.0) [default=0.0].
Step in Y for order centroid detection (long; default: 1) [default=1].
Degree in Y in the polynomial order tracing X=f(Y) (long; default: 5) [default=5].
Maximum allowed residual (before kappa-sigma clip) (float; default: 0.5) [default=0.5].
Kappa value in sigma clipping during order trace polynomial fit (float; default: 5.0) [default=5.0].
Number of iterations in sigma clipping during order trace polynomial fit (long; default: 5) [default=5].
Minimal fractions of points accepted / total in sigma clippingduring order trace polynomial fit (float; default: 0.4) [default=0.4].
The following code snippet shows the default settings for the available parameters.
import cpl
xsh_orderpos = cpl.Recipe("xsh_orderpos")
xsh_orderpos.param.keep_temp = "no"
xsh_orderpos.param.debug_level = "none"
xsh_orderpos.param.time_stamp = False
xsh_orderpos.param.decode_bp = 2144337919
xsh_orderpos.param.pre_overscan_corr = 1
xsh_orderpos.param.detectcontinuum_search_win_hsize = 5
xsh_orderpos.param.detectcontinuum_running_win_hsize = 0
xsh_orderpos.param.detectcontinuum_fit_win_hsize = 5
xsh_orderpos.param.detectcontinuum_center_thresh_fac = 0.0
xsh_orderpos.param.detectcontinuum_ordertab_step_y = 1
xsh_orderpos.param.detectcontinuum_ordertab_deg_y = 5
xsh_orderpos.param.detectcontinuum_clip_res_max = 0.5
xsh_orderpos.param.detectcontinuum_clip_sigma = 5.0
xsh_orderpos.param.detectcontinuum_clip_niter = 5
xsh_orderpos.param.detectcontinuum_clip_frac = 0.4
You may also set or overwrite some or all parameters by the recipe parameter param, as shown in the following example:
import cpl
xsh_orderpos = cpl.Recipe("xsh_orderpos")
[...]
res = xsh_orderpos( ..., param = {"keep_temp":"no", "debug_level":"none"})
See also
cpl.Recipe for more information about the recipe object.
Please report any problems to L.Guglielmi,R.Haigron,P.Goldoni,F.Royer, 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: L.Guglielmi,R.Haigron,P.Goldoni,F.Royer, A. Modigliani <amodigli@eso.org>