Jump to content

SkySurveyBanner.jpg.21855908fce40597655603b6c9af720d.jpg

Processing artifact


Recommended Posts

I thought some of you might be interested in seeing an odd looking artifact in one of my recent images of the bubble nebula (see below). 

At first, I thought this was due to incorrect settings within Pixinsight's Winzorised stacking algorithm. However, on examining the individual subs everything was OK - no artifact, just a star.  On closer examination of the individual subs,  I noticed that the star sometimes appeared clearly and sometimes appeared hardly at all.  So, I decided to see if the free ware program Aladin (https://aladin.u-strasbg.fr/ ) could identify the star. Plate solving the object in Pixinsight allowed me to locate the RA and DEC co-ordinates of the artifact (23 20 43.535, +61 14 43.54), after typing these into Aladin it turns out to be the variable star V*MOCas of Mira Cet type.  Since I gathered the data over many months, I presume the star was varying over this period and hence confusing the stacking algorithm and creating the artifact.

Alan

temp_artificat.jpg.c8d8c3317b4d80ca75bfa1059cb7c149.jpg

 

 

  • Like 3
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.