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Direct Hit
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Author:  DRatledge [ Mon Nov 02, 2015 9:11 pm ]
Post subject:  Direct Hit

Shooting Hickson 99 last night and suffered this direct hit - right through dead centre of the galaxy cluster.

Attachments:
a.jpg
a.jpg [ 124.23 KiB | Viewed 4791 times ]

Author:  bbones [ Tue Nov 03, 2015 9:44 am ]
Post subject:  Re: Direct Hit

Hmmm wonder if IRIS can sort this one out ?

Bill

Author:  rwilkinson [ Tue Nov 03, 2015 3:54 pm ]
Post subject:  Re: Direct Hit

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:

Author:  DRatledge [ Tue Nov 03, 2015 9:31 pm ]
Post subject:  Re: Direct Hit

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.

Author:  dean_kos [ Tue Nov 03, 2015 9:47 pm ]
Post subject:  Re: Direct Hit

:lol: :lol:

Author:  Amartin [ Wed Nov 04, 2015 9:09 am ]
Post subject:  Re: Direct Hit

I think that's what you call touché lol

Author:  DRatledge [ Fri Nov 20, 2015 9:15 pm ]
Post subject:  Re: Direct Hit

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.

Attachments:
sigmaclip.jpg
sigmaclip.jpg [ 81.37 KiB | Viewed 4690 times ]

Author:  dean_kos [ Fri Nov 20, 2015 11:36 pm ]
Post subject:  Re: Direct Hit

Wow, I count 17 galaxies !!
Any advance on that ??

Author:  DRatledge [ Tue Nov 24, 2015 2:27 pm ]
Post subject:  Re: Direct Hit

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.

Author:  Amartin [ Thu Nov 26, 2015 1:24 pm ]
Post subject:  Re: Direct Hit

Do you stack your CCD raws in maxim Dave? thats a Maxim screenshot isnt it?

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