Early Sixty-Day Observations of V5668 Sgr using a DSLR Camera

摘要

Photometric observations of V5668 Sgr (Nova Sagittarii 2015 No.2) were carried out using a consumer-grade DSLR camera. Observations were made under urban sky conditions for 60 days after discovery. The brightness of the nova was monitored with reference to several nearby reference stars using a Canon EOS 600D with CMOS sensor. Estimates were then transformed using a "median" B-V value of 0.28 into standard magnitude. Preliminary plot shows large variations, especially gradual rise and rapid falls.