Using Aperture to find flux

classic Classic list List threaded Threaded
2 messages Options
Reply | Threaded
Open this post in threaded view
|  
Report Content as Inappropriate

Using Aperture to find flux

CassCrowe
So I'm trying to get the H-alpha flux of a nebula and when I use the aperture tool a circle with T1=somebignumber next to it. Is this the flux? If so this gives me a magnitude of about -30 which doesn't seem right. Any help?
Reply | Threaded
Open this post in threaded view
|  
Report Content as Inappropriate

Re: Using Aperture to find flux

karenacollins
Administrator

The value associated with the aperture is the total integrated counts. In other words, it is the value after summing all of the pixel ADUs within the aperture.

Karen


On 11/15/2016 11:36 AM, CassCrowe [via AstroImageJ] wrote:
So I'm trying to get the H-alpha flux of a nebula and when I use the aperture tool a circle with T1=somebignumber next to it. Is this the flux? If so this gives me a magnitude of about -30 which doesn't seem right. Any help?


If you reply to this email, your message will be added to the discussion below:
http://astroimagej.1065399.n5.nabble.com/Using-Aperture-to-find-flux-tp532.html
To start a new topic under AstroImageJ, email [hidden email]
To unsubscribe from AstroImageJ, click here.
NAML

Loading...