AAVSO: American Association of Variable Star Observers

Coast-to-Coast Photometry: A Study in Consistency (Abstract)

Volume 45 number 1 (2017)

Tom Calderwood
Two photometric telescopes on opposite sides of North America are used to collect same-night data in Johnson B and V for selected stars. We find close agreement between the instruments, with a median difference of 4 millimagnitudes in twenty-two paired measurements. Data were gathered with Optec SSP3 and SSP5 photometers, and corrected for transformation and principal extinction in both bands, and for second-order extinction in B.

Abstract

(Abstract only) Two photometric telescopes on opposite sides of North America are used to collect same-night data in Johnson B and V for selected stars. We find close agreement between the instruments, with a median difference of 4 millimagnitudes in twenty-two paired measurements. Data were gathered with Optec SSP3 and SSP5 photometers, and corrected for transformation and principal extinction in both bands, and for second-order extinction in B.