NOAO >   Observing Info >   Approved Programs >   2017B-0042

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Program Information for 2017B-0042


PI: Misty C Bentz, Georgia State U., bentz@astro.gsu.edu
Address: Physics Department, 25 Park Place, Office 610, Atlanta, GA 30303 USA

CoI: Caroline Roberts, Georgia State U.
CoI: Merida Batiste, Georgia State U.
CoI: Christopher Onken, Australian National U.
CoI: Monica Valluri, U. of Michigan

Title: Reverberation Mapping of the Nearby Seyfert NGC3783

Abstract: NGC,3783 is one of the brightest and nearest broad-lined Seyfert galaxies. As such, it is one of only a handful of objects where we can attempt to directly compare black hole mass measurements based on reverberation mapping (which is limited by temporal resolution) and stellar dynamical modeling (which is limited by spatial resolution). To date, such comparisons have only been carried out for two Seyferts. Our team has been working to increase the number of such comparisons, and we have two more nearing completion, with 2-3 additional objects in progress. We have exhausted the sample of northern hemisphere targets, but LCO provides a unique set of capabilities for carrying out spectrophotometric monitoring programs in the southern hemisphere. NGC,3783 is our top priority southern target, especially as it is {bf not} included in the LCO AGN Key Project. All black hole mass estimates at different look-back times are based on reverberation mapping and/or dynamical modeling results for $<200$ nearby objects. Direct comparisons of these techniques are necessary to understand the magnitude of the biases and limitations inherent in each technique and to investigate the possibility of offsets in their resultant mass scales, which may profoundly affect our understanding of black hole growth and evolution.

Program Type: Standard/LCO

Scheduled Nights:
Run 1 (2017B):  LCO-1m/Sinistro -- 15.8hrs
Run 2 (2017B):  LCO-2m/FLOYDS -- 29.9hrs


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



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