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AN INTRODUCTION TO ASTRONOMICAL PHOTOMETRY
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AAVSO accuracy air mass amateur arc seconds Astronomical atmosphere bright brighter calculated calibration chart recorder circuit cluster CM CM CM color index comparison star constant count rate counter counts per second dark current dead-time detector determine deviation diaphragm differential photometry diode dynode earth1s eclipse electrons Equation error example extinction coefficients eyepiece filter finding charts flare flare star flux focal input light curve linear magnitudes and colors meter method minimum light night noise observations Observatory obtain occultation optical orbital period output percent photocathode photodiode photoelectric photometer photometer head photometric system photomultiplier tube photon phragm plot preamp pulse counting resistors Section sequence sky background spectral type standard stars star measurement stellar switch Table techniques telescope temperature transformation coefficients UBV system values variable star versus visual magnitude voltage wavelength zenith zero