NACO_IMG_TWFLAT(7)

💫 naco_img_twflat 💫

okay bestie, welcome to the naco_img_twflat(7) page, straight out of the naco recipes manual. this is the twilight flat recipe and she is lowkey iconic. let's get into it 💅

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✨ NAME ✨

naco_img_twflat — the Twilight flat recipe 🌸 (yes, twilight. like the sky. not the book. mostly.)

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🎀 SYNOPSIS 🎀

esorex naco_img_twflat [OPTIONS] FILE.sof

that's it, that's the whole vibe. esorex, the recipe name, your options, and a .sof file. periodt.

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🦋 DESCRIPTION 🦋

so naco_img_twflat is all about making a flat-field for NACO imaging, using twilight images. no cap.

the files you list in your Set Of Frames (the sof-file, iykyk) must be tagged like this:

• raw-file.fits → CAL_FLAT_TW
• raw-or-calib-file.fits → CAL_DARK

the flat frames get sorted into groups, and every group has identical instrument settings. each group of flats is reduced independently of the others — they don't talk, they don't share, main character energy only 💅

and for each group of flats, your set of frames has to contain either zero, one, or n dark frames with the same instrument settings — where n is the number of flats in that group. so like, it's 0, or 1, or all of them. nothing in between, bestie. 🌈

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💖 OPTIONS 💖

• --r <str> — Rejected left, right, bottom and top border, in pixels (str; default: ´200 200 200 200´). The full name of this option for the EsoRex configuration file is naco.naco_img_twflat.rej_bord [default = 200 200 200 200]. so basically, the edges get yeeted 🙈
• --t <str> — Low and high thresholds for the Bad Pixel Map (str; default: ´0.5 2.0´). The full name of this option for the EsoRex configuration file is naco.naco_img_twflat.thresholds [default = 0.5 2.0].
• --prop <bool> — Use the proportional fit (bool; default: False). The full name of this option for the EsoRex configuration file is naco.naco_img_twflat.proport [default = False].
• --bpm <bool> — Create the bad pixel map (bool; default: False). The full name of this option for the EsoRex configuration file is naco.naco_img_twflat.bpm [default = False].
• --errmap <bool> — Create the error map (bool; default: False). The full name of this option for the EsoRex configuration file is naco.naco_img_twflat.errmap [default = False].
• --intercept <bool> — Create the intercept image (bool; default: False). The full name of this option for the EsoRex configuration file is naco.naco_img_twflat.intercept [default = False].

ngl, a lil PSA: you can make a configuration file with these options in it, all with suitable default values. go check the details from the esorex --help command. it's giving organized 🎀

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🌟 SEE ALSO 🌟

the full documentation for the naco pipeline? download it as a PDF, bestie:

ftp://ftp.eso.org/pub/dfs/pipelines/naco/naco-pipeline-manual-1.1.pdf

an overview over the existing ESO pipelines lives right here: https://www.eso.org/sci/software/pipelines/.

basic documentation about the EsoRex program is at the esorex (1) man page.

and plot twist — you can 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 naco pipeline are: naco_img_checkfocus(7), naco_img_dark(7), naco_img_detlin(7), naco_img_jitter(7), naco_img_lampflat(7), naco_img_slitpos(7), naco_img_strehl(7), naco_img_zpoint(7), naco_spc_combine(7), naco_spc_lampflat(7), naco_spc_wavecal(7), naco_util_img_std_cat(7), naco_util_spc_argon(7), naco_util_spc_model(7). the whole friend group fr fr 💜

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⭐ VERSION ⭐

naco_img_twflat 4.4.11

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👑 AUTHOR 👑

Lars Lundin <usd-help@eso.org>

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💀 BUG REPORTS 💀

please report any problems to <usd-help@eso.org>. alternatively, you may send a report to the ESO User Support Department <usd-help@eso.org>. (yes, same address twice, they really want those bug reports 😭)

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🌸 LICENSE 🌸

this file is part of the NACO Instrument Pipeline Copyright (C) 2002, 2003, 2005, 2008 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.

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and that's the whole page, bestie 🫶 this was naco_img_twflat version 4.4.11, served fresh off the NACO_IMG_TWFLAT(7) page. slay, go make some flats ✨💖