---
name: "gimasterdark"
section: "7"
platform: "linux"
package: "cpl-plugin-giraf-doc"
version: "2.16.10+dfsg-1"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/gimasterdark"
---

# gimasterdark(7)

Creates a master dark image from a set of raw dark frames.

## NAME

gimasterdark - Creates a master dark image from a set of raw dark frames.

## SYNOPSIS

esorex **gimasterdark** \[OPTIONS\] FILE.sof

## DESCRIPTION

For detailed information please refer to the GIRAFFE pipeline user manual.

It is available at http://www.eso.org/pipelines.

## OPTIONS

- **--stack-method** *\<str\>*

  Stacking method: average, median, minmax or ksigma (str; default: ´median´). The full name of this option for the EsoRex configuration file is **giraffe.stacking.method** \[default = *median*\].

- **--stack-ksigmalow** *\<float\>*

  Lower threshold multiplier for method ksigma (float; default: 5.0). The full name of this option for the EsoRex configuration file is **giraffe.stacking.ksigma.low** \[default = *5.0*\].

- **--stack-ksigmahigh** *\<float\>*

  Upper threshold multiplier for method ksigma (float; default: 5.0). The full name of this option for the EsoRex configuration file is **giraffe.stacking.ksigma.high** \[default = *5.0*\].

- **--stack-minreject** *\<int\>*

  Minimum rejection level for method minmax (int; default: 1). The full name of this option for the EsoRex configuration file is **giraffe.stacking.minmax.minimum** \[default = *1*\].

- **--stack-maxreject** *\<int\>*

  Maximum rejection level for method minmax (int; default: 1). The full name of this option for the EsoRex configuration file is **giraffe.stacking.minmax.maximum** \[default = *1*\].

- **--remove-bias** *\<bool\>*

  Enable bias removal (bool; default: True). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.remove** \[default = *True*\].

- **--bsremove-method** *\<str\>*

  Bias removal method (str; default: ´PROFILE´). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.method** \[default = *PROFILE*\].

- **--bsremove-areas** *\<str\>*

  Bias areas to use (Xl0:Xr0:Yl0:Yr0, ... ,Xln:Xrn:Yln:Yrn) (str; default: ´5:40:0:4095´). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.areas** \[default = *5:40:0:4095*\].

- **--bsremove-sigma** *\<float\>*

  Sigma Clipping: sigma threshold factor (float; default: 2.5). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.sigma** \[default = *2.5*\].

- **--bsremove-niter** *\<int\>*

  Sigma Clipping: maximum number of iterations (int; default: 5). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.iterations** \[default = *5*\].

- **--bsremove-mfrac** *\<float\>*

  Sigma Clipping: minimum fraction of points accepted/total \[0.0..1.0\] (float; default: 0.8). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.fraction** \[default = *0.8*\].

- **--bsremove-xorder** *\<int\>*

  Order of X polynomial fit (CURVE method only) (int; default: 1). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.xorder** \[default = *1*\].

- **--bsremove-yorder** *\<int\>*

  Order of Y polynomial fit (CURVE method only) (int; default: 1). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.yorder** \[default = *1*\].

- **--bsremove-xstep** *\<int\>*

  Sampling step along X (CURVE method only) (int; default: 1). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.xstep** \[default = *1*\].

- **--bsremove-ystep** *\<int\>*

  Sampling step along Y (CURVE method only) (int; default: 1). The full name of this option for the EsoRex configuration file is **giraffe.biasremoval.ystep** \[default = *1*\].

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.

## SEE ALSO

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

-

  **ftp://ftp.eso.org/pub/dfs/pipelines/giraffe/giraf-pipeline-manual-2.11.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 giraf pipeline are [*giframestack*(7)](/giframestack/7.md), [*gimasterbias*(7)](/gimasterbias/7.md), [*gimasterflat*(7)](/gimasterflat/7.md), [*giscience*(7)](/giscience/7.md), [*gistandard*(7)](/gistandard/7.md), [*giwavecalibration*(7)](/giwavecalibration/7.md)

## VERSION

gimasterdark 2.16.10

## AUTHOR

Giraffe Pipeline \<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 GIRAFFE Instrument Pipeline\
  Copyright (C) 2002-2014 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