NOAO >   Observing Info >   Approved Programs >   2018A-0323

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Program Information for 2018A-0323


PI: Jonathan Trump, University of Connecticut, jonathan.trump@uconn.edu
Address: Physics Department, 2152 Hillside Road, Unit 3046, Storrs, CT 06269-3046 USA

CoI: Yasaman Homayouni, University of Connecticut
CoI: Keith Horne, U. of St. Andrews
CoI: Yue Shen, U. of Illinois Urbana-Champaign
CoI: Kate Grier, Pennsylvania State U.
CoI: W. Niel Brandt, Pennsylvania State U.
CoI: Pat Hall, York University
CoI: David Starkey, U. of Illinois Urbana-Champaign

Title: Accretion-Disk Echo Mapping: Adding LCO Optical to Hubble UV Monitoring

Abstract: We propose accretion-disk reverberation mapping (RM) of 5 quasars using the LCO 2m to add $r$ and $z$ optical photometry to our approved textit{HST} UV monitoring campaign. There exist only 4 previous low- luminosity Seyfert AGNs with UV/optical RM accretion-disk sizes: in contrast, our 5 quasars span an order of magnitude higher accretion rate and have accurate BH masses from SDSS-RM. The combined UV-optical RM observations will directly probe the accretion-rate dependence of the inner accretion disk, where significant structural changes have been suggested by theory and previous indirect observations. Our scheduled 32-orbit textit{HST} UV campaign will only succeed with the $rz$ optical monitoring proposed here. We use simulations to establish the 186-hr observing design, using a daily cadence from Feb~1 -- May~20 to accurately measure UV-optical continuum lags and accretion-disk structure. The combined textit{HST}-LCO monitoring campaign will enable critical new measurements of accretion-disk structure during the rapid accretion mode that dominates black hole growth.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 2 (2018A):  LCO-1m/Sinistro -- 181hrs


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2018A-0323

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