SYNOPSIS

esorex vmmoscalib [OPTIONS] FILE.sof

DESCRIPTION

This recipe is used to identify reference lines on MOS arc lamp exposures, and trace the spectral edges on the corresponding flat field exposures. This information is used to determine the spectral extraction mask to be applied in the scientific data reduction, performed with the recipe vimos_science. The input arc lamp and flat field exposures are assumed to be obtained quasi-simultaneously, so that they would be described by exactly the same instrument distortions.

A line catalog must be specified, containing the wavelengths of the reference arc lamp lines used for the wavelength calibration. A grism table (typically depending on the instrument mode, and in particular on the grism used) may also be specified: this table contains a default recipe parameter setting to control the way spectra are extracted for a specific instrument mode, as it is used for automatic run of the pipeline on Paranal and in Garching. If this table is specified, it will modify the default recipe parameter setting, with the exception of those parameters which have been explicitly modifyed on the command line.

If a grism table is not specified, the input recipe parameters values will always be read from the command line, or from an esorex configuration file if present, or from their generic default values (that are rarely meaningful). Finally a master bias frame must be input to this recipe.

In the table below the MOS_CURV_COEFF, MOS_CURV_TRACES, MOS_SPATIAL_MAP MOS_ARC_SPECTRUM_EXTRACTED, MOS_SPECTRA_DETECTION, MOS_SLIT_MAP, and MOS_SLIT_LOCATION, are never created in case of long-slit-like data.

The products MOS_SPECTRA_DETECTION, MOS_SLIT_MAP, and MOS_DISP_RESIDUALS, are just created if the --check parameter is set to true. The product GLOBAL_DISTORTION_TABLE is just created if more than 12 separate spectra are found in the CCD.

Input files:

  DO category:               Type:       Explanation:         Required:
  MOS_SCREEN_FLAT            Raw         Flat field exposures    Y
  MOS_ARC_SPECTRUM           Raw         Arc lamp exposure       Y
  MASTER_BIAS                Calib       Bias frame              Y
  LINE_CATALOG               Calib       Line catalog            Y
  CONFIG_TABLE               Calib       Grism table             .

Output files:

  DO category:               Data type:  Explanation:
  MOS_COMBINED_SCREEN_FLAT   FITS image  Combined (sum) flat field
  MOS_MASTER_SCREEN_FLAT     FITS image  Normalised flat field
  MOS_ARC_SPECTRUM_EXTRACTED FITS image  Wavelength calibrated arc spectrum
  MOS_DISP_COEFF             FITS table  Inverse dispersion coefficients
  MOS_DISP_RESIDUALS         FITS image  Residuals in wavelength calibration
  MOS_DISP_RESIDUALS_TABLE   FITS table  Residuals in wavelength calibration
  MOS_DELTA_IMAGE            FITS image  Offset vs linear wavelength calib
  MOS_WAVELENGTH_MAP         FITS image  Wavelength for each pixel on CCD
  MOS_SPECTRA_DETECTION      FITS image  Check for preliminary detection
  MOS_SLIT_MAP               FITS image  Map of central wavelength on CCD
  MOS_CURV_TRACES            FITS table  Spectral curvature traces
  MOS_CURV_COEFF             FITS table  Spectral curvature coefficients
  MOS_SPATIAL_MAP            FITS image  Spatial position along slit on CCD
  MOS_SPECTRAL_RESOLUTION    FITS table  Resolution at reference arc lines
  MOS_SLIT_LOCATION          FITS table  Slits on product frames and CCD
  GLOBAL_DISTORTION_TABLE    FITS table  Global distortions table

OPTIONS

--dispersion <float>

Expected spectral dispersion (Angstrom/pixel) (float; default: 0.0). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.dispersion [default = 0.0].

--peakdetection <float>

Initial peak detection threshold (ADU) (float; default: 0.0). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.peakdetection [default = 0.0].

--wdegree <long>

Degree of wavelength calibration polynomial (long; default: 0). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.wdegree [default = 0].

--wradius <long>

Search radius if iterating pattern-matching with first-guess method (pixel) (long; default: 4). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.wradius [default = 4].

--wreject <float>

Rejection threshold in dispersion relation fit (pixel) (float; default: 1.0). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.wreject [default = 1.0].

--wmodelss <long>

Interpolation mode of wavelength solution (0 = no interpolation, 1 = fill gaps, 2 = global model) (long; default: 2). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.wmodelss [default = 2].

--wmodemos <long>

Interpolation mode of wavelength solution (0 = no interpolation, 1 = local (slit) solution, 2 = global model) (long; default: 1). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.wmodemos [default = 1].

--ignore_lines <str>

Catalog lines nearest to wavelengths in this list will be ignored for wavelength calibration (str; default: ''). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.ignore_lines [default = ].

--used_linesets <str>

Linesets to use. Valid are 'standard' and'extended' (see column LINE_SET in the line catalogue) (str; default: 'standard'). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.used_linesets [default = standard].

--cdegree <long>

Degree of spectral curvature polynomial (long; default: 0). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.cdegree [default = 0].

--cmode <long>

Interpolation mode of curvature solution applicable to MOS-like data (0 = no interpolation, 1 = fill gaps, 2 = global model) (long; default: 1). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.cmode [default = 1].

--startwavelength <float>

Start wavelength in spectral extraction (float; default: 0.0). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.startwavelength [default = 0.0].

--endwavelength <float>

End wavelength in spectral extraction (float; default: 0.0). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.endwavelength [default = 0.0].

--reference <float>

Reference wavelength for slit map (float; default: 0.0). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.reference [default = 0.0].

--slit_ident <bool>

Attempt slit identification.For multiplexing data slit identification is always performed. Switching it off will cause systematic errors in the absolute flux calibration if the FLAT_SED correction is used (see pipeline manual for details) (bool; default: True). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.slit_ident [default = True].

--s_degree <long>

Polynomial degree for the flat field fitting along spatial direction (long; default: -1). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.s_degree [default = -1].

--sradius <long>

Smooth box radius for flat field along spatial direction (used if s_knots < 0) (long; default: -1). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.sradius [default = -1].

--d_nknots <long>

Number of knots in flat field fitting splines along dispersion direction (long; default: -1). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.d_nknots [default = -1].

--dradius <long>

Smooth box radius for flat field along dispersion direction (if d_knots < 0) (long; default: 10). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.dradius [default = 10].

--fit_threshold <float>

Threshold percentage for flat spline fitting with respect to the maximum (float; default: 0.01). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.fit_threshold [default = 0.01].

--line_ident_tol <float>

Tolerance for the ratio of detected lines vs reference lines. This is used during for arc line identification. (float; default: 0.05). The full name of this option for the EsoRex configuration file is vimos.vmmoscalib.line_ident_tol [default = 0.05].

Note that it is possible to create a configuration file containing these options, along with suitable default values. Please refer to the details provided by the 'esorex --help' command.

VERSION

vmmoscalib 3.1.6

AUTHOR

Carlo Izzo <[email protected]>

LICENSE

This file is currently part of the VIMOS Instrument Pipeline Copyright (C) 2002-2006 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA