vmmosstandard (7)

esorex vmmosstandard [OPTIONS] FILE.sof

This recipe is used to calibrate and extract a standard star spectrum obtained in MOS mode, and compare it with a catalog spectrum to obtain the efficiency and the response curves.

Input files:

  DO category:               Type:      Explanation:         Required:
  MOS_STANDARD               Raw        Science exposure        Y
  MASTER_BIAS                Calib      Master bias             Y
  EXTINCT_TABLE              Calib      Atmospheric extinction  Y
  STD_FLUX_TABLE             Calib      Standard star fluxes    Y
  MASTER_DARK                Calib      Master dark             .

  MOS_MASTER_SCREEN_FLAT     Calib      Normalised flat field   .

  EXTRACT_TABLE              Calib      Extraction table        .

  GRISM_TABLE                Calib      Grism table             Y
  CCD_TABLE                  Calib      Bad pixel table         .

Output files:

  DO category:               Data type: Explanation:
  MOS_STANDARD_REDUCED       FITS image Extracted spectrum
  MOS_STANDARD_EXTRACTED     FITS image Sky subtracted slit spectra
  MOS_STANDARD_SKY           FITS image Sky slit spectra
  MOS_STANDARD_SKY_EXTRACTED FITS image Extracted sky spectrum
  OBJECT_TABLE               FITS table Objects spectra identification
  WINDOW_TABLE               FITS table Objects positions in slit
  MOS_SPECPHOT_TABLE         FITS table Efficiency and response curves

The standard star spectrum is calibrated and extracted as described for the recipe vmmosobsstare. The extracted spectrum is compared to catalog fluxes of the same star to obtain the efficiency curve and the response curve to use for flux calibration. For this comparison the extracted spectrum is converted into electrons/sec/Angstrom. The catalog fluxes, as well as the atmospheric extinction factors, are remapped to the same wavelength bins of the extracted spectrum. After removing the effect of the atmospheric extinction (i.e., correcting the extracted spectrum to airmass zero), the response curve is derived as the ratio between the catalog spectrum and the calibrated spectrum.

The efficiency curve is obtained by dividing the extracted spectrum in electrons/sec/Angstrom by the the catalog fluxes converted from erg/cm/cm/s/Angstrom to photons/s/Angstrom (at 100% efficiency each photon would correspond to one electron).

For more details, please refer to the VIMOS Pipeline User\'s Guide.

--BiasMethod <str>

Bias removal method. (str; default: \'Zmaster\'). The full name of this option for the EsoRex configuration file is vimos.Parameters.bias.removing.method [default = Zmaster].

--SkyMethod <str>

Sky level determination method. (str; default: \'Median\'). The full name of this option for the EsoRex configuration file is vimos.Parameters.sky.method [default = Median].

--PolyOrder <long>

Degree of polynomial used when the SkyMethod is set to Fit. (long; default: 0). The full name of this option for the EsoRex configuration file is vimos.Parameters.sky.order [default = 0].

--SkyKSigmaLow <float>

Low threshold for K-sigma rejection in sky fitting. (float; default: 3.0). The full name of this option for the EsoRex configuration file is vimos.Parameters.sky.ksigma.low [default = 3.0].

--SkyKSigmaHigh <float>

High threshold for K-sigma rejection in sky fitting. (float; default: 3.0). The full name of this option for the EsoRex configuration file is vimos.Parameters.sky.ksigma.high [default = 3.0].

--Fuzz <long>

Extra pixels from expected position of spectrum edge in extraction. (long; default: 5). The full name of this option for the EsoRex configuration file is vimos.Parameters.extraction.fuzz [default = 5].

--SlitMargin <long>

Number of excluded pixels at slit ends in object search or in sky level determination. (long; default: 2). The full name of this option for the EsoRex configuration file is vimos.Parameters.detection.exclude [default = 2].

--LineWidth <long>

Size of spectrum to extract around any skyline. (long; default: 16). The full name of this option for the EsoRex configuration file is vimos.Parameters.sky.linewidth [default = 16].

--DetectionLevel <float>

Object detection level in units of sigma. (float; default: 10.0). The full name of this option for the EsoRex configuration file is vimos.Parameters.detection.sigma [default = 10.0].

--WatershedLevels <long>

Number of levels in the watershed method in object detection. (long; default: 32). The full name of this option for the EsoRex configuration file is vimos.Parameters.detection.levels [default = 32].

--WatershedFraction <float>

Flux fraction to use in watershed. (float; default: 0.01). The full name of this option for the EsoRex configuration file is vimos.Parameters.detection.fraction [default = 0.01].

--MinObjectSize <long>

Minimal size for an object candidate to be considered an object. (long; default: 2). The full name of this option for the EsoRex configuration file is vimos.Parameters.detection.minsize [default = 2].

--MaxObjectSize <long>

Maximal size for an object candidate for not trying deblend into sub- objects. (long; default: 7). The full name of this option for the EsoRex configuration file is vimos.Parameters.detection.maxsize [default = 7].

--CleanBadPixel <bool>

Bad pixel correction on MOS science exposure. (bool; default: True). The full name of this option for the EsoRex configuration file is vimos.Parameters.badpixel.clean [default = True].

--HorneExtraction <bool>

Use 1D Horne extraction. (bool; default: False). The full name of this option for the EsoRex configuration file is vimos.Parameters.extraction.optimal [default = False].

--ModelSlit <bool>

Model wavelength solution within each slit. (bool; default: True). The full name of this option for the EsoRex configuration file is vimos.Parameters.slit.model [default = True].

--ModelSlitOrder <long>

Order of polynomial for wavelength solution modeling within each slit. (long; default: 0). The full name of this option for the EsoRex configuration file is vimos.Parameters.slit.order [default = 0].

--UseSkylines <bool>

Use sky lines to refine the wavelength calibration (bool; default: True). The full name of this option for the EsoRex configuration file is vimos.Parameters.sky.align [default = True].

--ResponseOrder <long>

Order of the polynomial used to smooth the instrument response curve. (long; default: 5). The full name of this option for the EsoRex configuration file is vimos.Parameters.response.order [default = 5].

--ReduceAnyFrame <bool>

Reduce any frame. (bool; default: False). The full name of this option for the EsoRex configuration file is vimos.Parameters.reduceall [default = False].

--ComputeQC <bool>

Compute QC1 parameters (bool; default: True). The full name of this option for the EsoRex configuration file is vimos.Parameters.quality.enable [default = True].

--SelectSlit <long>

Slit containing the standard star. (long; default: 0). The full name of this option for the EsoRex configuration file is vimos.Parameters.slit.select [default = 0].

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.

The full documentation for the vimos pipeline can be downloaded as a PDF file using the following URL:

• ftp://ftp.eso.org/pub/dfs/pipelines/vimos/vimos-pipeline-manual-6.9.pdf

An overview over the existing ESO pipelines can be found on the web page http://www.eso.org/sci/software/pipelines/.

Basic documentation about the EsoRex program can be found at the esorex (1) man page.

It is possible to call the pipelines from python using the python-cpl package. See http://packages.python.org/python-cpl/index.html for further information.

The other recipes of the vimos pipeline are vmifucombinecube(7), vmifucalib(7), vmimflatsky(7), vmspflat(7), vmmosobsstare(7), vmimflatscreen(7), vmimpreimaging(7), vmimcalphot(7), vmmoscombine(7), vmimstandard(7), vmmosobsjitter(7), vmifucombine(7), vmimobsjitter(7), vmspphot(7), vmdet(7), vmmosscience(7), vmspcaldisp(7), vmifustandard(7), vmbias(7), vmmoscalib(7), vmimobsstare(7), vmdark(7), vmifuscience(7)

vmmosstandard 2.9.15

ESO VIMOS Pipeline Team <[email protected]>

Please report any problems to [email protected]. Alternatively, you may send a report to the ESO User Support Department <[email protected]>.

This file is part of the VIMOS Instrument Pipeline Copyright (C) 2002-2005 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