Provided by: cpl-plugin-muse-doc_2.8.7+dfsg-3_all 
NAME
muse_bias - Combine several separate bias images into one master bias file.
SYNOPSIS
esorex muse_bias [OPTIONS] FILE.sof
DESCRIPTION
This recipe combines several separate bias images into one master bias file. The master
bias contains the combined pixel values, in adu, of the raw bias exposures, with respect
to the image combination method used. Processing trims the raw data and records the
overscan statistics, corrects the data levels using the overscan (if overscan is not
"none") and combines the exposures using input parameters. The read-out noise is computed
for each quadrant of the raw input images and stored as QC parameter. The variance
extension is filled with an initial value accordingly, before image combination. Further
QC statistics are computed on the output master bias. Additionally, bad columns are
searched for and marked in the data quality extension.
OPTIONS
--nifu <int>
IFU to handle. If set to 0, all IFUs are processed serially. If set to -1, all IFUs
are processed in parallel. (int; default: 0). The full name of this option for the
EsoRex configuration file is muse.muse_bias.nifu [default = 0].
--overscan <str>
If this is "none", stop when detecting discrepant overscan levels (see ovscsigma),
for "offset" it assumes that the mean overscan level represents the real offset in
the bias levels of the exposures involved, and adjusts the data accordingly; for
"vpoly", a polynomial is fit to the vertical overscan and subtracted from the whole
quadrant. (str; default: ´vpoly´). The full name of this option for the EsoRex
configuration file is muse.muse_bias.overscan [default = vpoly].
--ovscreject <str>
This influences how values are rejected when computing overscan statistics. Either
no rejection at all ("none"), rejection using the DCR algorithm ("dcr"), or
rejection using an iterative constant fit ("fit"). (str; default: ´dcr´). The full
name of this option for the EsoRex configuration file is muse.muse_bias.ovscreject
[default = dcr].
--ovscsigma <float>
If the deviation of mean overscan levels between a raw input image and the
reference image is higher than |ovscsigma x stdev|, stop the processing. If
overscan="vpoly", this is used as sigma rejection level for the iterative
polynomial fit (the level comparison is then done afterwards with |100 x stdev| to
guard against incompatible settings). Has no effect for overscan="offset". (float;
default: 30.0). The full name of this option for the EsoRex configuration file is
muse.muse_bias.ovscsigma [default = 30.0].
--ovscignore <int>
The number of pixels of the overscan adjacent to the data section of the CCD that
are ignored when computing statistics or fits. (int; default: 3). The full name of
this option for the EsoRex configuration file is muse.muse_bias.ovscignore [default
= 3].
--combine <str>
Type of image combination to use. (str; default: ´sigclip´). The full name of this
option for the EsoRex configuration file is muse.muse_bias.combine [default =
sigclip].
--nlow <int>
Number of minimum pixels to reject with minmax. (int; default: 1). The full name of
this option for the EsoRex configuration file is muse.muse_bias.nlow [default = 1].
--nhigh <int>
Number of maximum pixels to reject with minmax. (int; default: 1). The full name of
this option for the EsoRex configuration file is muse.muse_bias.nhigh [default =
1].
--nkeep <int>
Number of pixels to keep with minmax. (int; default: 1). The full name of this
option for the EsoRex configuration file is muse.muse_bias.nkeep [default = 1].
--lsigma <float>
Low sigma for pixel rejection with sigclip. (float; default: 3.0). The full name of
this option for the EsoRex configuration file is muse.muse_bias.lsigma [default =
3.0].
--hsigma <float>
High sigma for pixel rejection with sigclip. (float; default: 3.0). The full name
of this option for the EsoRex configuration file is muse.muse_bias.hsigma [default
= 3.0].
--losigmabadpix <float>
Low sigma to find dark columns in the combined bias (float; default: 30.0). The
full name of this option for the EsoRex configuration file is
muse.muse_bias.losigmabadpix [default = 30.0].
--hisigmabadpix <float>
High sigma to find bright columns in the combined bias (float; default: 3.0). The
full name of this option for the EsoRex configuration file is
muse.muse_bias.hisigmabadpix [default = 3.0].
--merge <bool>
Merge output products from different IFUs into a common file. (bool; default:
False). The full name of this option for the EsoRex configuration file is
muse.muse_bias.merge [default = False].
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.
SEE ALSO
The full documentation for the muse pipeline can be downloaded as a PDF file using the
following URL:
ftp://ftp.eso.org/pub/dfs/pipelines/muse/muse-pipeline-cookbook-2.8.7.pdf
An overview over the existing ESO pipelines can be found on the web page
https://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
https://packages.python.org/python-cpl/index.html for further information.
The other recipes of the muse pipeline are muse_ampl(7), muse_astrometry(7),
muse_create_sky(7), muse_dark(7), muse_exp_align(7), muse_exp_combine(7), muse_flat(7),
muse_geometry(7), muse_illum(7), muse_lingain(7), muse_lsf(7), muse_qi_mask(7),
muse_scibasic(7), muse_scipost(7), muse_scipost_apply_astrometry(7),
muse_scipost_calibrate_flux(7), muse_scipost_combine_pixtables(7),
muse_scipost_correct_dar(7), muse_scipost_correct_rv(7), muse_scipost_make_cube(7),
muse_scipost_raman(7), muse_scipost_subtract_sky(7), muse_scipost_subtract_sky_simple(7),
muse_standard(7), muse_twilight(7), muse_wavecal(7)
VERSION
muse_bias 2.8.7
AUTHOR
Peter Weilbacher <https://support.eso.org>
BUG REPORTS
Please report any problems to https://support.eso.org. Alternatively, you may send a
report to the ESO User Support Department <usd-help@eso.org>.
LICENSE
This file is part of the MUSE Instrument Pipeline Copyright (C) 2005, 2019 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 02111-1307 USA