- #1
joseamck
- 13
- 0
I have astronomical images taken using a CCD camera and telescope using a g filter. In the images I have stars with what is called instrumental magnitudes (from the photon count in each pixel). My question is if there is a way to change this g instrumental magnitude to a real V magnitude.
I have found this:
V = g - 0.03 - 0.42*(g-r)
from
Windhorst, R. W., et al. 1991, ApJ, 380, 362
and http://www.astro.umd.edu/~ssm/ASTR620/mags.html
This is telling me that I needed to have used an r filter on the same images. Is there another way to find the V magnitudes of the stars by only having images taken with a g filter?
Thank you
I have found this:
V = g - 0.03 - 0.42*(g-r)
from
Windhorst, R. W., et al. 1991, ApJ, 380, 362
and http://www.astro.umd.edu/~ssm/ASTR620/mags.html
This is telling me that I needed to have used an r filter on the same images. Is there another way to find the V magnitudes of the stars by only having images taken with a g filter?
Thank you