Quote:
Originally Posted by Rob_K
Great poll David.  Just wondering if you could clarify the categories. I've always thought of photometry as reduction of CCD images using suitable software. So I'm not exactly sure what you mean by visual.
I do lots of 'fainter thans' on a selection of known & candidate RNes using widefield DSLR images, visually checking the frames. Occasionally I'll estimate magnitudes (visually) from green channels, but only on CVs that for various reasons may have very few observations (eg southern novae in their early stages). My 'obs' are useless otherwise. Is that the sort of thing you mean? Or are you just including all ways observers use to estimate magnitudes including visual through-the-eyepiece estimates?
Thanks!
Cheers - |
Photometry is simply the measurement of the brightness of an object - not about the instrument used. There is the eyeball, the photomultiplier tube (still in wide use I believe), the CCD (including CMOS chipped digital cameras - not just DSLR's), filtered and unfiltered, and the spectrometer of course. (Not sure if anyone is still using film so if they are then they can put that under 'other')
Cheers