.TH FORS_SPEC_MFLAT "7" "5.5.7" "fors_spec_mflat" "fors recipes" .SH NAME fors_spec_mflat \- Computes master spectroscopic flat, removing bias first .SH SYNOPSIS esorex .B fors_spec_mflat [OPTIONS] FILE.sof .SH DESCRIPTION This recipe is used to subtract the master bias, produced by the recipe fors_bias, from a set of raw flat field frames. The input raw frames are summed, the master bias frame is rescaled accordingly, and subtracted from the result. The overscan regions, if present, are used to compensate for variations of the bias level between master bias and input raw frames. .PP The overscan regions are then trimmed from the result. .PP In the table below the MXU acronym can be alternatively read as MOS and LSS. .PP Input files: DO category: Type: Explanation: Required: SCREEN_FLAT_MXU Raw Raw data frame Y SLIT_LOCATION_MXU Calib Slits positions on CCD Y CURV_COEFF_MXU Calib Slits tracing fits Y DISP_COEFF_MXU Calib Wavelength calibration Y MASTER_BIAS Calib Master bias frame Y Output files: DO category: Data type: Explanation: MASTER_SCREEN_FLAT_MXU FITS image Bias subtracted sum frame .SH OPTIONS .TP \fB\-\-smooth_sed\fR \fI\fR Smoothing size for each flat sed (float; default: 0.0). The full name of this option for the EsoRex configuration file is \fBfors.fors_spec_mflat.smooth_sed\fR [default = \fI0.0\fR]. .TP \fB\-\-stack_method\fR \fI\fR Frames combination method (str; default: \'sum\'). The full name of this option for the EsoRex configuration file is \fBfors.fors_spec_mflat.stack_method\fR [default = \fIsum\fR]. .TP \fB\-\-klow\fR \fI\fR Low threshold in ksigma method (float; default: 3.0). The full name of this option for the EsoRex configuration file is \fBfors.fors_spec_mflat.klow\fR [default = \fI3.0\fR]. .TP \fB\-\-khigh\fR \fI\fR High threshold in ksigma method (float; default: 3.0). The full name of this option for the EsoRex configuration file is \fBfors.fors_spec_mflat.khigh\fR [default = \fI3.0\fR]. .TP \fB\-\-kiter\fR \fI\fR Max number of iterations in ksigma method (int; default: 999). The full name of this option for the EsoRex configuration file is \fBfors.fors_spec_mflat.kiter\fR [default = \fI999\fR]. .TP \fB\-\-nonlinear_level\fR \fI\fR Level above which the detector is not linear (float; default: 50000.0). The full name of this option for the EsoRex configuration file is \fBfors.fors_spec_mflat.nonlinear_level\fR [default = \fI50000.0\fR]. .TP \fB\-\-max_nonlinear_ratio\fR \fI\fR Maximum allowed ratio of non\-linear pixels per slit (float; default: 0.2). The full name of this option for the EsoRex configuration file is \fBfors.fors_spec_mflat.max_nonlinear_ratio\fR [default = \fI0.2\fR]. .PP 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. .SH SEE ALSO The full documentation for the fors pipeline can be downloaded as a PDF file using the following URL: .IP .B ftp://ftp.eso.org/pub/dfs/pipelines/fors/fors\-pipeline\-manual\-4.9.pdf .PP An overview over the existing ESO pipelines can be found on the web page \fBhttps://www.eso.org/sci/software/pipelines/\fR. .PP Basic documentation about the EsoRex program can be found at the esorex (1) man page. .PP It is possible to call the pipelines from python using the python\-cpl package. See \fBhttps://packages.python.org/python\-cpl/index.html\fR for further information. .PP The other recipes of the fors pipeline are .IR fors_align_sky (7), .IR fors_align_sky_lss (7), .IR fors_bias (7), .IR fors_calib (7), .IR fors_config (7), .IR fors_dark (7), .IR fors_detect_objects (7), .IR fors_detect_spectra (7), .IR fors_extract (7), .IR fors_extract_objects (7), .IR fors_extract_slits (7), .IR fors_flatfield (7), .IR fors_img_science (7), .IR fors_img_screen_flat (7), .IR fors_img_sky_flat (7), .IR fors_normalise_flat (7), .IR fors_photometry (7), .IR fors_pmos_calib (7), .IR fors_pmos_extract (7), .IR fors_pmos_science (7), .IR fors_remove_bias (7), .IR fors_resample (7), .IR fors_science (7), .IR fors_subtract_sky (7), .IR fors_subtract_sky_lss (7), .IR fors_sumflux (7), .IR fors_trace_flat (7), .IR fors_wave_calib (7), .IR fors_wave_calib_lss (7), .IR fors_zeropoint (7) .SH VERSION fors_spec_mflat 5.5.7 .SH AUTHOR Carlo Izzo .SH BUG REPORTS Please report any problems to usd\-help@eso.org. Alternatively, you may send a report to the ESO User Support Department . .SH LICENSE This file is currently part of the FORS Instrument Pipeline Copyright (C) 2002\-2011 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