Hi all ,
I did photometry in U , B , V , R , and I Band
For the I band i choose 000-BCL-374 which is the alone star with a Imag in the field of my camera .
The problem is that a 9.9 mag star and have a very bad snr, and my measure is not precise.
Where can i find a better reference star ?
Most of the
Most of the brighter comp stars near the nova are in the Hipparcos catalog and have V-I as well as B-V colors listed. What camera and instrument are you using? Is your FOV wide enough to take in any Hipparcos stars?