PixInsight Forum (historical)

PixInsight => General => Off-topic => Topic started by: Cleon_Wells on 2012 January 15 10:27:17

Title: Where to report a Star flare up?
Post by: Cleon_Wells on 2012 January 15 10:27:17

Check this image out showing a star flare up in the field of view of my two  ngc7635 images, separated by 101 days, (10/2/11-01/10/12). The changing Low Pixel Rejection maps are from subs that I acquired on 01/10/12. These subs are 120sec with a 5sec separation, I combined the first ten subs and integrated with Region of Interest (Preview Window 01), I then removed the first 4 subs and added the next four subs, keeping the total integration to 10 subs for each of the 11 Integrations.
Cleon

Title: Re: Where to report a Star flare up?
Post by: martin_magnan on 2012 January 15 16:27:26

Woah !!! nice catch Cleon

Martin

Title: Re: Where to report a Star flare up?
Post by: Cleon_Wells on 2012 January 15 16:56:55

Martin, thanks, this is another example of my skillful use of Dumb Luck Processing. DLP. 8>)
This star/object is visible  in this image taken in 1997.
 
http://www.frazmtn.com/~bwallis/n7635_ao.html

I assume this is a Nova, a white dwarf star pulling material from the dim visible  companion star in this location.
Cleon

Title: Re: Where to report a Star flare up?
Post by: Enzo De Bernardini on 2012 January 15 21:47:20

Hi Cleon,

I have identified the image area using a DigitizedSkySurvey (http://archive.stsci.edu/cgi-bin/dss_form) plate, and later could identify the object with Aladin (http://aladin.u-strasbg.fr/): seems to be the variable star MO Cassiopeiae (http://www.aavso.org/vsx/index.php?view=detail.top&oid=6608), a Mira type (pulsating, long period, high amplitude)

Also, a nice catch ;)

Best regards,

Enzo.

Title: Re: Where to report a Star flare up?
Post by: Cleon_Wells on 2012 January 16 04:06:36

Enzo, thanks for the identification of this object. I did joke with my wife on the remote possibility that this was an incoming fleet of Destructor Ships. 8)

And I though we were about to hear some poetry from “Prostetnic Vogon Jeltz”

Getting back to my Method of discovery (DLP) and (PI, The Good , The Bad and the ugly).
The Pros of PI are all the adjustments the Cons are the same and the ugly is me.
The Method is Image Integration/Pixel Rejection Maps and DLP. I used a sub from 10/2/11 to Register the 1/10/12 subs and one 10/2/11 sub as my reference sub during Image Integration of the 1/10/12 subs. This combination revealed a round star (MO Cas) in the Low Pixel Rejection Map, with a Low Sigma window setting of 2.5%.
Cleon