Extinction Coefficient

Posted by Chatzisotiriou Marina on Apr 17, 2019; 10:58am
URL: http://astroimagej.170.s1.nabble.com/Extinction-Coefficient-tp1128.html

Hello!

I have taken images of Standard Stars and I'm trying to calculate the extinction coefficient for each night. I've been told that in order to do that I need to measure the magnitude of the star and then draw a straight line on the plot airmass - magnitude. Is there a way to measure the magnitude of a star using AstroImageJ?

Thank you very much!
Marina