FORS_REMOVE_BIAS(7)

💖 fors_remove_bias 💖

okay so bestie, welcome to fors_remove_bias(7) — yes it's a page from the fors recipes manual and yes it's about to be your new fave. this is the recipe that takes the bias off your raw frames. slay. 🎀

---

✨ NAME ✨

fors_remove_bias — subtract that bias from your input frame, periodt. 💅

---

🌸 SYNOPSIS 🌸

esorex fors_remove_bias [OPTIONS] FILE.sof

---

🦋 DESCRIPTION 🦋

okay so here's the vibe: this recipe subtracts the overscan and the master bias from one raw data frame. and where does that master bias come from? from the recipe fors_bias, bestie, keep up. 💖

the overscan regions — if they're even there — get used to compensate for variations in the overall bias level between the master bias and the input raw frame. and then? the overscan regions get trimmed from the result. bye girl, not needed anymore. ✂️

the recipe should allow any fors frame. no gatekeeping. 🌈

📥 Input files 📥

• DO category ANY_CAT — Type: Raw — Explanation: raw data frame — Required: Y
• DO category MASTER_BIAS — Type: Calib — Explanation: master bias frame — Required: Y

📤 Output files 📤

• DO category ANY_CAT_UNBIAS — Data type: FITS image — Explanation: bias subtracted frame

---

✨ OPTIONS ✨

so lowkey there are no options listed here, BUT — and this is the important part — you can totally create a configuration file containing these options, along with suitable default values. just go check the details that the esorex --help command gives you. iykyk. 👑

---

🔭 SEE ALSO 🔭

the full documentation for the fors pipeline can be downloaded as a PDF file using this URL, no cap:

ftp://ftp.eso.org/pub/dfs/pipelines/fors/fors-pipeline-manual-4.9.pdf

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

basic documentation about the EsoRex program? that's at the esorex (1) man page. go read it. 🫶

and guess what — 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. python girlies rise. 🐍

the other recipes of the fors pipeline are — and yes i'm listing every single one, we don't skip here 💅:

fors_align_sky(7), fors_align_sky_lss(7), fors_bias(7), fors_calib(7), fors_config(7), fors_dark(7), fors_detect_objects(7), fors_detect_spectra(7), fors_extract(7), fors_extract_objects(7), fors_extract_slits(7), fors_flatfield(7), fors_img_science(7), fors_img_screen_flat(7), fors_img_sky_flat(7), fors_normalise_flat(7), fors_photometry(7), fors_pmos_calib(7), fors_pmos_extract(7), fors_pmos_science(7), fors_resample(7), fors_science(7), fors_spec_mflat(7), fors_subtract_sky(7), fors_subtract_sky_lss(7), fors_sumflux(7), fors_trace_flat(7), fors_wave_calib(7), fors_wave_calib_lss(7), fors_zeropoint(7)

---

⭐ VERSION ⭐

fors_remove_bias 5.5.7

---

👑 AUTHOR 👑

Carlo Izzo <usd-help@eso.org>

---

😭 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 it's the same address both times, they really want to hear from you fr fr 🫶)

---

📜 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.

---

no cap: all the facts stayed, only the vibe got a glow-up. 💖✨

and that's the whole page babes — this was fors_remove_bias version 5.5.7, part of the fors recipes manual. mwah, take care of your frames, bestie 🎀🦋💅