Uth oh?
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Uth oh?
I suspected the calibration frames so I processed it with no calibration and the glow was still there if not worse
Now granted the master dark was a 300 second duration and had to be 'optimized' when applied to the 180 second light frames. The darks were quite recent. I don't have a 180 sec 139/21 dark … yet.
Still I don't think that a corresponding dark is going to solve this problem and frankly suspect the camera. But I could be wrong.
I also thought it might have something to do with the narrow band filter so I swapped it out for the lum / ir cut filter and still have the same thing. With a brand new dust bunny to boot
Here is a more or less 'raw' image only stretched, no other processing was done.
Glow by Tom Whit, on Flickr
That of course is M45 or a piece of it. Pretty sure there is no red nebulosity around there.
Any ideas?
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Re: Uth oh?
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Re: Uth oh?
Current Equipment:
Mount: Celestron CGX-L
Scope: 130mm f7 APO
Cam: ASI071mc-pro
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Re: Uth oh?
This is in a much darker region of sky but you can see glow all around the image but most prominently to the right.
Example 2 by Tom Whit, on Flickr
Current Equipment:
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Re: Uth oh?
Sorry you're having issues,
JT
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
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Re: Uth oh?
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Re: Uth oh?
Or battery glow if your battery is to one side.
Try putting a spare battery in the fridge and swapping it in between frames.
Canon lenses 100 to 400 L series, 18 to 135 usm.
Mount's, 2x alt az, 2 x eq (adventurer an neq6pro.)
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Re: Uth oh?
This is an ASI1600mc cooled to -20C
I have not had a chance to ask elsewhere yet. Might post on the Pixinsight forums for some opinions.
BTW I looked it up and the warranty on the camera ran out in October.... of course.
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Re: Uth oh?
mine is two distinct areas of glow, but almost identical in size to yours.
I've learned to use PixInsight's dynamic background extractor to remove most of it. Darks don't touch it, whatever it is.
Good Luck!
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Re: Uth oh?
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Re: Uth oh?
One thing I have learned is that you should NOT calibrate dark frames as it tries to average out the background levels making things worse.
I made a new set of darks with the appropriate duration, offset, gain and applied those. It made a slight improvement as the darks did not have to be scaled but as mentioned darks dont seem to do much with it. Though I did one run without any calibration and it was horrible! So the calibration do help to some extent.
Thanks for the link Henk, I have never noticed that colored region in any image of M45 I have seen before. Maybe some of it is actual signal? Though it does not explain it showing up on the galaxy image.
I am going to shoot a new set of flats tonight since it will be cloudy anyhow and I need a fresh set for the UV/IR cut filter.
I will post back results afterwards.
Thanks for the help so far!
Current Equipment:
Mount: Celestron CGX-L
Scope: 130mm f7 APO
Cam: ASI071mc-pro
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Re: Uth oh?
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
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Re: Uth oh?
Clear skies,
Steve
Cameras; Atik 460ex mono, Zwo ASI1600MC-cool, QHY5L-II color and mono
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Re: Uth oh?
Why is it red?
Getting ready to collect the flats, then the flat darks. Another hour or two (after I put everything away).
Current Equipment:
Mount: Celestron CGX-L
Scope: 130mm f7 APO
Cam: ASI071mc-pro
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Re: Uth oh?
Applied those and it is better, I 'think'.
A background extraction helps but still :p
New Calibration by Tom Whit, on Flickr
Now to try to put this mosaic together
Current Equipment:
Mount: Celestron CGX-L
Scope: 130mm f7 APO
Cam: ASI071mc-pro
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