Hi all,
I've been imaging the Elephant's Trunk Nebula over the last few nights. I have stacked 9 hours of different exposure times - 180s, 300s and 600s
I included darks at each exposure time, flats and bias frames in the stack - however when I started to stretch the data in photoshop, it is horribly noisy with coloured streaks through it - I'm guessing these are hot pixels?
Can anyone give me some advice when stacking fames of different exposure times on Deep Sky Stacker? Do I need to assign the correct dark frame to each exposure, or does DSS do this automatically (which is what I assumed)
My other images have not had these issues (some have had a few of the coloured streaks but nothing like in this stack!)
I have stretched the data very basically and I've included a crude screenshot - zoomed in on an example of the noise - but it is over most of the image.
Other information: I'm using a ZWO ASI183MC Pro cooled to -10C with 160Gain, no binning. Scope: Redcat51, HEQ5 guided exposures with dithering using the ASIAIR Pro
Thanks in advance!