I-band Measurements of Red Giant Variables: Methods and Photometry of 66 Stars


Terry T. Moon

Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia

Received April 11, 2013; revised May 16, 2013; accepted May 16, 2013


New measurements of IC and V–IC are presented for 66 bright red giant variables. This is the first stage of a program to measure sufficient numbers of such stars that also have well-determined Hipparcos parallaxes with a view to calibrating the TRGB in the IC band as a tool for accurately measuring distances to nearby galaxies.