Help with tutorial
I finished the IRIS beginner tutorial, but my results seem to be off. I feel pretty confident about steps 1-5, but I may have made a mistake in step 6, photometry. In Step 6 a, the tutorial mentions configuring the magnitude constant, but I do not see where this is explained. As a result, I left the magnitude constant at 0.0. Maybe this is throwing off my results?
Here's what I got for Instrumental Magnitudes for the Comparison Stars:
Iam Aur -10.747
rho Aur -10.339
mu Aur -10.671
ome Aur -10.616
sig Aur -10.364
58 Per -11.190
I only took these values from one of the final separated green channel files. Is that right?
m = 0.111
Average Check V Mag = 4.743, which is more than +/-0.01 from the 4.705 V Cat
Finally, my average V Mag for the target star was 3.741
These values were a result of the average from all 3 of the separated green channels. Again, is that correct?
Another thought I had was that I may have made a mistake when getting the instrumental magnitudes because I had difficulty centering the crosshair right in the middle of the stars. How sensitive is that part?
Thanks for your help,