Stacking Comet ZTF
 
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2023-03-15: APP 2.0.0-beta14 has been released !

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Stacking Comet ZTF

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(@woldsweather)
Main Sequence Star
Joined: 3 years ago
Posts: 26
Topic starter  

A video on YT mentions a way of stacking a comet with stars and getting no trailing from the comet or the stars? Is this possible without clicking on every image (on the nucleus)?


   
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(@mabula-admin)
Universe Admin
Joined: 6 years ago
Posts: 3458
 

Dear Trevor,

I am not sure to what video you refer to. Currently, APP does not yet provide a come stack withour sharp stars and a sharp comet out-of-the-box. We do have this on our ToDo list though.

If APP asks you to select the comet nucleus in each image, it means it is a very weak comet (or your exposure time is rather short). On brighter comets, APP will only ask you this in the 1st and last image.

Mabula


   
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(@mabula-admin)
Universe Admin
Joined: 6 years ago
Posts: 3458
 

Hi @woldsweather

Other reasons for APP to ask the comet nucleus in each image can be:

 

  • The data for each sub is rather noisy
  • Or the time intervals between exposures is a bit too long, normally the exposures are directly shot after each other, maybe you have delays between each exposure?

 

It could be that your data is simply close to the threshold for detection in the current comet detection  algorithm. I will try to work in this in the coming days actually.

Mabula


   
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(@woldsweather)
Main Sequence Star
Joined: 3 years ago
Posts: 26
Topic starter  

Now uploaded Mabula.


   
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(@slaughters85j)
Main Sequence Star
Joined: 2 years ago
Posts: 14
 

@mabula-admin is there a procedure I can reference for comet stacking?  Not sure if there is a load parameter that is specific for comets or later in the processing chain. I don't see an option for clicking the comet's nucleus.

 

Thanks


   
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