HOW TO MONITOR AGN INTRA-DAY VARIABILITY AT 230GHZ

Jae-Young Kim, Sascha Trippe
2013 Journal of The Korean Astronomical Society  
We probe the feasibility of high-frequency radio observations of very rapid flux variations in compact active galactic nuclei (AGN). Our study assumes observations at 230 GHz with a small 6-meter class observatory, using the SNU Radio Astronomical Observatory (SRAO) as an example. We find that 33 radio-bright sources are observable with signal-to-noise ratios larger than ten. We derive statistical detection limits via exhaustive Monte Carlo simulations assuming (a) periodic, and (b) episodic
more » ... and (b) episodic flaring flux variations on time-scales as small as tens of minutes. We conclude that a wide range of flux variations is observable. This makes high-frequency radio observations -even with small observatories -a powerful probe of AGN intra-day variability; especially, those which complement observations at lower radio frequencies with larger observatories like the Korean VLBI Network (KVN).
doi:10.5303/jkas.2013.46.2.65 fatcat:eexuijbhybeoxfkaofjxoowoqe