20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

Photometric Monitoring of Active Galactic Nuclei using the Thai Robotic Telescope in Chile

21 May 2015, 10:00
15m
White Lotus ()

White Lotus

Oral presentation Astronomy, Astrophysics, and Cosmology Astronomy, Astrophysics and Cosmology (Sponsored by NARIT)

Speaker

Mr Bovornpratch Vijarnwannaluk (Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 10330 , Thailand)

Description

We report the ongoing variability monitoring program for a well-defined, flux-limited sample of active galactic nuclei (with Bj<18 mag) through a multi-band optical imaging using Thailand's 0.6-m remotely-operated telescope at Cerro Tololo Inter-American Observatory, Chile. Our goal is to search for month-time scales outbursts to identify potential targets for spectroscopic follow-up to estimate the broad-line region size through reverberation mapping technique. We have developed a Python pipeline based on the publicly available SWARP or SExtractor to efficiently extract the photometry and produce light-curves in the B,V, and R bands. We typically achieve a consistent photometric uncertainty of < 0.05 mag for targets at 14-15 mag under optimal conditions at an average cadence of two days or better for a number of objects during a 2014 - 2015. Here, we demonstrate the use of our machinery to monitor PG1302-102, which has recently been found to be the first candidate of a binary supermassive blackhole at sub-kpc distance, at accuracy approaching 0.01mag over 14 months.

Primary author

Mr Bovornpratch Vijarnwannaluk (Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 10330 , Thailand)

Co-authors

Dr Malte Schramm (Kavli IPMU, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, Chiba, Japan) Dr Wiphu Rujopakarn (Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 10330 , Thailand)

Presentation Materials