- #1

StillLearningToronto

- 9

- 1

## Homework Statement

You have decided to use a CCD camera to check if a 16th magnitude quasar is variable.

With your telescope/camera combination, you know that a star with a magnitude of 0 would deliver 1 × 109 photons/second to one pixel, so this allows you to work out the photons/second from the quasar delivered to one pixel.

SO- taking out the numbers i need: My quasar is the 16th magnitude.

The star I am comparing it to has a magnitude of 0.

The 0 mag star gives out 1*10^9 photons/second (1 pixel)

## Homework Equations

m2-m1=-2.5log(F2/F1)

## The Attempt at a Solution

Im not sure if "flux" and "photons/second" are the same thing, BUT if they are, then:

m2-m1=-2.5log(F2/F1)

16-0=-2.5log(F2/1*10^9photons/second)

F2=3.98*10^2 photons/second.**Im not looking for the answer because I really want to figure this out, I just need to know if I am going in the right direction, thank you in advance ! (: