Optical Photometrical Observations of 3C273
Abstract
The quasar 3C273 is one of selected targets in our monitoring program. In this paper, we present the optical V, R and I photometric observations done with the 1.56 m telescope at the Shanghai Astronomical Observatory (ShAO) from 2000 to 2008. Our observations indicate that the variations in the three bands are Δ I = 1.04± 0.14 mag,
Δ R = 1.30± 0.15 mag and Δ V = 1.42± 0.20 mag, a micro-variation of 0.18 mag over 2.1hrs is detected in R band. The color indices are in the ranges: V-R = 0.09 to 0.55, V-I = 0.33 to 1.13, and R-I=0.12 to 0.73, and their averages are: V-R=0.30± 0.10,V-I=0.73± 0.16, R-I=0.42± 0.12.- Publication:
-
The Starburst-AGN Connection
- Pub Date:
- October 2009
- Bibcode:
- 2009ASPC..408..306F