why does a globular cluster typically require much less total integration time than a faint galaxy? two things I wanted to learn about:
1) how long should total integration time be for a particular target?
2) how long should each sub exposure be?
(1) and (2) are independent as far as I am concerned, but your model links them together.
We are just using different approaches, no worries.
I am sure Frank is going to log in and show us how it is done!!
I can see a globular with my 50.00 binoculars. I took a photo of one with my 15 year old DSLR when i first got started and it came out really good.
I didn't do any of this math until i started doing more difficult targets.
Not sure why this question is posed as a challenge.
I started this entire post saying I think in integration time. 10 hours is more than i'd ever do on a single object from my home. SO i chose 10 hours.
You can change that number and everything should update.
With experience i know 5-8 is probably my number... some people say they don't do anything less than 15-20. Again, not sure why this question poses any change to anything?
edit, i dunno what i did with my edits that show the graphs over time... i'll update this again.
Basically, with 10 hours being my ceiling it would show the SNR diminishing returns over time based on the conditions and i could see at which point its not worth moving forward.
Edited by sn2006gy, 19 August 2020 - 05:29 PM.