Weird banding / noi...
 
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2022-05-29: APP 2.0.0-beta2 has been released !

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Weird banding / noise in HA image.


(@najeebbukhari04)
Molecular Cloud Customer
Joined: 1 year ago
Posts: 4
Topic starter  

Hi guys,

Was my first time shooting in HA last night and got around 1 hour on the Sadr region. Each frame is 1.5 minutes long, shot with a modded 600D, Samyang 135mm and an Astronomik Ha 12nm filter. After integrating, I got these weird blue lines that I have never seen on any of my images prior to this. I dithered every 3-5 frames as I normally do in both RA and Dec.

I selected H Alpha for the Light frames and flat frames during the loading stage and did not select anything for the darks and bias. Have I done something wrong?

Note: I'm using the latest beta version of APP.

Hopefully someone here could help an amateur. Image shown is straight out of APP with a slight crop and stretch applied.

Sadr HA Stretched

 

This topic was modified 2 months ago by Najeeb Bukhari

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(@vincent-mod)
Quasar Admin
Joined: 5 years ago
Posts: 4850
 

Could you try to post the screenshot again? Please use the "attach files" or drag and drop the picture in here. Best is to use jpeg,png etc. not fits.


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(@najeebbukhari04)
Molecular Cloud Customer
Joined: 1 year ago
Posts: 4
Topic starter  

Hiya,

Here it is. 

image

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(@wvreeven)
Galaxy Admin
Joined: 4 years ago
Posts: 1723
 

@najeebbukhari04 Thanks. Which calibration files did you use?


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(@najeebbukhari04)
Molecular Cloud Customer
Joined: 1 year ago
Posts: 4
Topic starter  

@wvreeven No worries! I used flats (40), darks (20) and bias (100). 


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