>>3727326No filters; I figured I'd drive out to a better spot, but it really looked less bright last night than any night I've gone out even just on the brim of my town--I assume that's low transparency, and caused by the accumulation of fire particles here in UT.
Faint things like the dust lanes of M31 don't just come out of SNR, do they? If I'm subtracting read noise via biases and darks, am I actually getting signal if it's not past some threshold?
To keep up on where andromeda would drift through the frame, I just took long exposures to see where stars were going, so I had a few. Here's one 10s sub.
