I'm a new user of the AVVSO website (or better a member) and I need some help to report correctly my observations.
I'm using a Celestron C8 XLT with a B/W CCD (Meade DSI PRO II) using a Johnson V filter. I did some test with my CCD using the following process.
1) Get the image
2) Get the dark (10 avaraged), bias , flat (10 median) and darkflat (10 averaged)
3) Using AstroArt I corrected the image with the dark and flat
3) I'm using AstroArt to make photometry, I think is the "aperture" photometry measurement. I get a photometry table from AVVSO in which there are several (three) references. I used those references to "calibrate" the photometry relation and I've got the magnitude of the variable star with an estimation of the error.
First question. Is that process correct? Any advice?
Now I'd like to submit the report to AVVSO but I have some question on how to fill it.
Using "Enter Observation Individually" and type = CCD I don't know how to fill:
Check this box if your magnitude is transformed. -> Should I select this or not.? My guess is yes
Check this box if your magnitude is differential. -> Shuold I select it or not? My guess is no!
Comp Label : I didn't use any comparison star or, weel, more than one. Should I fill it with the chart label? Photometric table label ? Or what else?
Comp Mag: Did I make an "ensemble" photometry or not? What should I write in this field?
Check Star and Check Magnitude : Shuold I leave this fields empty?
Any help or suggestion will be very appreciated.