man kmo_extract_spec (7): Extract a spectrum from a cube.

SYNOPSIS

esorex kmo_extract_spec [OPTIONS] FILE.sof

DESCRIPTION

This recipe extracts a spectrum from a datacube. The datacube must be in F3I KMOS FITS format (either with or without noise). The output will be a similarly formatted F1I KMOS FITS file.

BASIC PARAMETERS

--mask_method There are several ways to define the region to consider for spectrum calculation:
  * 'integrated'' (default)
  A circular mask with defined centre and radius is created (--centre and
  --radius have to be defined). This mask is applied to all extensions.

  * 'mask'
  An arbitrary mask can be provided (for example the mask created by kmo_sky_mask
  can be used). The mask must be in F2I KMOS FITS format, mustn't contain noise
  and must have as many extensions as the input cube. The mask can be binary as
  well as it can contain float values, so a weighted mask is also possible.

(0: pixels is ignored, 1: pixel is included) The mask must be of the same size
that the input datacube.

  * 'optimal'
  The mask is created automatically by fitting a normalised profile (using
  kmo_fit_profile) to the image of the datacube (using kmo_make_image the data-
  cube is summed up in spectral direction according to the specified --cmethod).

  This profile is then used as mask input. When --save_mask is set to true the
  mask is saved on disk. The remaining parameters not described here apply to
  the fitting of the profile.

If the spectra of several objects in a IFU should be extracted, --mask_method= 'mask' is recommended. With several calls to kmo_extract_spec using different masks all spectra can be extracted.

ADVANCED PARAMETERS

--centre --radius see --mask_method = 'integrated'

--save_mask see --mask_method = 'optimal'

--cmethod Applies only if –mask_method = 'integral' Following methods of frame combination are available:
   * 'ksigma' (Default)
   An iterative sigma clipping. For each position all pixels in the spectrum
   are examined. If they deviate significantly, they will be rejected according
   to the conditions:
       val > mean + stdev * cpos_rej
   and
       val < mean - stdev * cneg_rej
   where --cpos_rej, --cneg_rej and --citer are the corresponding configuration
   parameters. In the first iteration median and percentile level are used.

* 'median'
At each pixel position the median is calculated.

* 'average'
At each pixel position the average is calculated.

* 'sum'
At each pixel position the sum is calculated.

* 'min_max'
The specified number of minimum and maximum pixel values will be rejected.

--cmax and --cmin apply to this method.

--cpos_rej --cneg_rej --citer see --cmethod='ksigma'

--cmax --cmin see --cmethod='min_max'

Input files:

   DO                    KMOS
   category              Type   Explanation                    Required #Frames
   --------              -----  -----------                    -------- -------
   <none or any>         F3I    The datacubes                     Y        1
   <none or any>         F2I    The mask                          N       0,1

Output files:

   DO                    KMOS
   category              Type   Explanation
   --------              -----  -----------
   EXTRACT_SPEC          F1I    Extracted spectrum
   EXTRACT_SPEC_MASK     F2I    (optional, if --save_mask=true and
                                --mask_method='optimal': The calculated mask)

OPTIONS

--mask_method <str>: Either apply 'mask', 'integrated' or 'optimal' masking method. (str; default: 'integrated'). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.mask_method [default = integrated].
--centre <str>: The centre of the circular mask (pixel). (str; default: '7.5,7.5'). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.centre [default = 7.5,7.5].
--radius <float>: The radius of the circular mask (pixel). (float; default: 3.0). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.radius [default = 3.0].
--save_mask <bool>: True if the calculated mask should be saved. (bool; default: False). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.save_mask [default = False].
--cmethod <str>: Apply "average", "median", "sum", "min_max." or "ksigma". (str; default: 'ksigma'). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.cmethod [default = ksigma].
--cpos_rej <float>: The positive rejection threshold for kappa-sigma-clipping (sigma). (float; default: 3.0). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.cpos_rej [default = 3.0].
--cneg_rej <float>: The negative rejection threshold for kappa-sigma-clipping (sigma). (float; default: 3.0). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.cneg_rej [default = 3.0].
--citer <long>: The number of iterations for kappa-sigma-clipping. (long; default: 3). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.citer [default = 3].
--cmax <long>: The number of maximum pixel values to clip with min/max-clipping. (long; default: 1). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.cmax [default = 1].
--cmin <long>: The number of minimum pixel values to clip with min/max-clipping. (long; default: 1). The full name of this option for the EsoRex configuration file is kmos.kmo_extract_spec.cmin [default = 1].

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

kmo_extract_spec 1.3.5

AUTHOR

Alex Agudo Berbel <[email protected]>

BUG REPORTS

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

LICENSE

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