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Alex
If your interested reading it , here’s my DSS stacking procedure ( including Star detection threshold) to produce your linear stacked fits file ready for loading into Startools
Deep Sky Stacker basic procedures
Open Deep Sky Stacker
All tasks and settings are on the LHS column
“Open pictures files” and load your Raw (Cr) files or Fits files
Open “dark files” and load your darks
Open “flat files” and load your flats
Open “offset/bias files” and load them
Press Check all ( all files will be ticked or checked in the file list at the bottom ready for registering
Press “Register checked pictures”
Register Settings box opens up
“Actions tab”
Tick box - already registered picture
Tick box - Automatic detection of hot pixels
Tick box - Stack after registering
Select the best 90% to 95% pictures and then “untuck this box” so you can check your Stacking Settings later ( I prefer to check later )
“Advanced tab”- star detection threshold try 10% at first but try other settings like 30% or 50% as there may not be enough stars for DSS to align
I recommend between 120 to 250 stars , so increase or decrease the star detection threshold to achieve enough stars
Recommended Settings button
DSS give you the recommended setting highlighted in green based on the number and type of files to stack
Stacking Parameters button
Intermediate files
Only check FITS files box and Use all available processors box
Leave other check boxes clear or unchecked
Press OK then DSS will start registering files
After files are registered press “Stack checked pictures”
Stacking Steps box appears
Recommended Settings button
DSS gives you the recommended setting for stacking highlighted in green ( you can change them if you want to )
Stacking Parameters
Result tab - check Standard mode
Light tab - check Kappa Sigma clipping
Alignment tab - check Automatic
Intermediate Files tab - check FITS files
Cosmetic tab - don’t do anything
Output tab - check Create Output file, check Append a number to avoid file overwrite, check Create Output file in the folder of the reference frame
Check Use available processors
Press OK
Now Press OK in Stacking Steps
DSS will now stack files based on selected settings
After stacking, DSS will create an output image ready to save
“Important” - do not use DSS RGB level adjustments , leave stacked image as it is
After stacking, in “Processing section” click “Save picture to file” option
Save as window appears , select where you want it saved in your computer and file name etc
Save as type will be FITS image ( 32bit integer )
Under “Compression” below leave as none
Under “Options” below , bullet check - do not apply adjustments to the saved image
Click save and stacked file should be saved to your file location ready for Startools or other processing software
Cheers
Martin
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