Data processing using SiriL
SiriL is also a relatively new piece of software (we’re using it in the HOYS-LCO project to create colour images) that has some neat scripting features that make it possible to automate the processing of HOYS data. As I use a One Shot Colour (OSC) CMOS camera I need to separate out the 3 individual colour channels to upload to the HOYS server. The script can do this for me.
You can download my script »
This needs to be saved in your user / Appdata / Roaming/ Siril / scripts directory as a .ssf file (the download is a .ssf.txt file as I couldn’t upload a .ssf file to the site).
To run correctly you need to separate out your files into 4 directories within the SiriL working directory named: lights, darks, flats, biases.
To run the script simply choose the script from the Scripts menu and everything else is done for you. The process the script runs through is:
- Stack and build the master flat, dark and bias
- Pre-process the lights using these masters
- Align and register the pre-processed lights
- Stack lights to produce an RGB image
- Split the image into 3 channels
At the end you have 3 files named TR.fit, TG.fit, TB.fit for the three tri-colour filters as well as an RGB.fit file.
There are a few things still to be done before I upload the files to the HOYS server:
- set the filename to something meaningful – I usually name it with the HOYS number (eg H118), the object name (IC5070), filter (TR), camera temp (-10C), exposures (3×180), date and time, my account name
- I also set the FILTER (TR, TG, TB) and EXPTIME (540s) in the FITS header
I have created a simple python script that does the naming and FITS header mods for me. All that’s left to do is upload the files to the HOYS server and process them there.
Happy to provide more info if anyone is interested or would find it useful.