NAME¶

SYNOPSIS¶

DESCRIPTION¶

Combine a list of twilight flat frames into a mean frame. Optionally compare the output frame to a master twilight flat frame

The program accepts the following files in the SOF:

Tag Description

FLAT_TWILIGHT A list of raw twilight flat images MASTER_DARK A master dark frame REFERENCE_TWILIGHT_FLAT Optional reference twilight flat frame MASTER_BPM Optional master bad pixel map or MASTER_CONF Optional master confidence map If no reference twilight flat is made available, then no comparison will be done. This means there will be no output ratio image. If either a masterbad pixel mask or a master confidence map is specified, this will be usedto help mask out bad pixels

OPTIONS¶

--lthr <float>

Low rejection threshold for underexpsed images (float; default: 4000.0). The full name of this option for the EsoRex configuration file is hawki.hawki_twilight_flat_combine.lthr [default = 4000.0].

--hthr <float>

High rejection threshold for overexposed images (float; default: 30000.0). The full name of this option for the EsoRex configuration file is hawki.hawki_twilight_flat_combine.hthr [default = 30000.0].

--combtype <str>

Combination algorithm (str; default: ´median´). The full name of this option for the EsoRex configuration file is hawki.hawki_twilight_flat_combine.combtype [default = median].

--scaletype <str>

Scaling algorithm (str; default: ´multiplicative´). The full name of this option for the EsoRex configuration file is hawki.hawki_twilight_flat_combine.scaletype [default = multiplicative].

--xrej <bool>

True if using extra rejection cycle (bool; default: True). The full name of this option for the EsoRex configuration file is hawki.hawki_twilight_flat_combine.xrej [default = True].

--thresh <float>

Rejection threshold in sigma above background (float; default: 5.0). The full name of this option for the EsoRex configuration file is hawki.hawki_twilight_flat_combine.thresh [default = 5.0].

--ncells <int>

Number of cells for data channel stats (int; default: 8). The full name of this option for the EsoRex configuration file is hawki.hawki_twilight_flat_combine.ncells [default = 8].

--prettynames <bool>

Use pretty output file names? (bool; default: False). The full name of this option for the EsoRex configuration file is hawki.hawki_twilight_flat_combine.prettynames [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¶

ftp://ftp.eso.org/pub/dfs/pipelines/hawki/hawki-pipeline-manual-2.4.3.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 hawki pipeline are hawki_cal_dark(7), hawki_cal_distortion(7), hawki_cal_flat(7), hawki_cal_zpoint(7), hawki_dark_combine(7), hawki_detector_noise(7), hawki_linearity_analyse(7), hawki_sci_jitter(7), hawki_science_postprocess(7), hawki_science_process(7), hawki_standard_process(7), hawki_step_apply_dist(7), hawki_step_basic_calib(7), hawki_step_combine(7), hawki_step_compute_bkg(7), hawki_step_detect_obj(7), hawki_step_photom_2mass(7), hawki_step_refine_offsets(7), hawki_step_stats(7), hawki_step_stitch(7), hawki_step_subtract_bkg(7), hawki_tec_filtchk(7), hawki_util_gendist(7), hawki_util_stdstars(7)

VERSION¶

AUTHOR¶

BUG REPORTS¶

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