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Direct Hit

Posted: Mon Nov 02, 2015 9:11 pm
by DRatledge
Shooting Hickson 99 last night and suffered this direct hit - right through dead centre of the galaxy cluster.

Re: Direct Hit

Posted: Tue Nov 03, 2015 9:44 am
by bbones
Hmmm wonder if IRIS can sort this one out ?

Bill

Re: Direct Hit

Posted: Tue Nov 03, 2015 3:54 pm
by rwilkinson
You were lucky to get anything of the galaxy cluster at all - this is all I could see from here last night:

Image

It was very foggy! :lol:

Re: Direct Hit

Posted: Tue Nov 03, 2015 9:31 pm
by DRatledge
Ross,
Was the can in front of the double glazing? That would block the view.
Bill,
Hopefully add a sequence>sigma clipping will remove the aeroplane. Faint aeroplanes seem harder for it to remove than bright ones.

Re: Direct Hit

Posted: Tue Nov 03, 2015 9:47 pm
by dean_kos
:lol: :lol:

Re: Direct Hit

Posted: Wed Nov 04, 2015 9:09 am
by Amartin
I think that's what you call touché lol

Re: Direct Hit

Posted: Fri Nov 20, 2015 9:15 pm
by DRatledge
At last got around to stacking the images with the direct hit - there were 10 in all which is usually enough for sigma clipping to work its magic. It did and the aeroplane has vanished.

Re: Direct Hit

Posted: Fri Nov 20, 2015 11:36 pm
by dean_kos
Wow, I count 17 galaxies !!
Any advance on that ??

Re: Direct Hit

Posted: Tue Nov 24, 2015 2:27 pm
by DRatledge
One point I should have added - if IRIS doesn't remove the aeroplane trails try reducing sigma to 1 and increasing the number of iterations to 2. That usually works.

Re: Direct Hit

Posted: Thu Nov 26, 2015 1:24 pm
by Amartin
Do you stack your CCD raws in maxim Dave? thats a Maxim screenshot isnt it?