Intra-night optical variability of AGN in the COSMOS field with the KMTNet
Joonho Kim; Marios Karouzos; Myungshin Im; Changsu Choi; Dohyeong Kim; Hyunsung D. Jun; Joon Hyeop Lee; Mar Mezcua · 2018 · arXiv
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Abstract (excerpt)
Active Galactic Nucleus (AGN) variability can be used to study the physics of the region in the vicinity of the central black hole. In this paper, we investigated intra-night optical variability of AGN in the COSMOS field in order to understand the AGN instability at the smallest scale. Observations were performed using the KMTNet on three separate nights for 2.5-5 hour at a cadence of 20-30 min. We find that the observation enables the detection of the short-term variability as small as $\sim$ 0.02 and 0.1 mag for $R \sim$ 18 and 20 mag sources, respectively. Using four selection methods (X-r
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Metadata source: arXiv