Paula Sánchez Paulina Lira - Regis Cartier - Nicolás Miranda CHARACTERIZATION OF AGN VARIABILITY IN THE OPTICAL AND NIR REGIMES Paula Sánchez Hidden Monsters 2016 AGN VARIABILITY ▸ Which is the mechanism responsible for AGN variability? ▸ How is the observed variability related with physical quantities of AGNs? L vs σ2 from Simm et al. 2016 BOL rms MCG-6-30-15 from Lira et al. 2015 Paula Sánchez Hidden Monsters 2016 AGN VARIABILITY It is very hard to detect NIR even in luminous AGNs! cc s n o i t u b i r t s i D d i o r t n e C Lag behind B (days) Figure from: Chris Harrison PhD Thesis (2014). MCG-6-30-15 cross correlations from Lira et al. 2015 Double peaks in the Optical-NIR cros correlations, probably from the disk and the torus! Paula Sánchez Hidden Monsters 2016 AGN CLASSIFICATION Optical NL BL 22 2 I N <= 10 cm H � XR 22 2 II N > 10 cm H � Paula Sánchez Hidden Monsters 2016 VARIABILITY ANALYSIS Variable Object? 2 χ Probability Excess Variance N obs 2 (m m) i 2 2 2 � � � = � 2 LC m �2 � = � m rms m2 i=1 i X 2 2 2 P (� ) > 0.95 � err(� ) > 0 rms rms � Paula Sánchez Hidden Monsters 2016 VARIABILITY ANALYSIS ▸ Structure Function � ⇡ ⌧ 2 2 SF (�t) = �m � + � SF (⌧ ) = A i,j i j 2 | | � 1yr ⌧r ��t ✓ ◆ q OPTICAL ANALYSIS THE QUEST - LA SILLA AGN VARIABILITY SURVEY eso.org Paula Sánchez Hidden Monsters 2016 ESO-SCHIMDT - QUEST DATA ‣ Images of Stripe82, ECDFS, XMM-LSS, ELAIS-S1, and COSMOS fields, taken between 2011 and 2015. ‣ 2 QUEST camera: 112 CCDs (7.5 deg ), Q band ~ (g + r) SDSS Details in Cartier et al. 2015 ~ 20TB of raw data!! COSMOS Stripe82 eso.org ECDFS XMM-LSS ELAIS-S1 Paula Sánchez Hidden Monsters 2016 OPTICAL VARIABILITY ANALYSIS Analysis for AGN with spectroscopic classification from optical counterpart catalog of the XMM-COSMOS field (Brusa et al. 2010) Regis Cartier PhD Thesis, details in Cartier et al. 2015 SF parameters % of variable AGN in the Q band NL BL e l b a i r a v % A BL AGN NL AGN 𝛾 Paula Sánchez Hidden Monsters 2016 CANDIDATES SELECTION