AAVSO: American Association of Variable Star Observers

Using AAVSO Tools to Calibrate Secondary Standard Stars (Abstract)

Volume 45 number 1 (2017)

Michael D. Joner
Brigham Young University, Department of Physics and Astronomy, N488 ESC, Provo, UT 84602; xxcygni@gmail.com

Abstract

(Abstract only) New discoveries often make it necessary to work in fields without adequate standard comparison sequences for coverage of faint magnitudes or atypical color ranges. Using available tools provided by the AAVSO such as VPHOT, Transform Generator, Transform Applier, and APASS, a method is outlined to add additional stars to standard comparison star sequences within a science field. Results are presented for BVRI secondary standards in the field of the active galaxy NGC 4151 and the recent supernova SN 2016coj in NGC 4125.