Extragalactic abstracts - IRSA - California Institute of Technology

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Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 511/742 Spitzer Space Telescope − Archive Research Proposal #30347 9−D Bayesian Quasar Classification in the Mid−IR/Optical Principal Investigator: Gordon Richards Institution: Johns Hopkins University Technical Contact: Gordon Richards, Johns Hopkins University Co−Investigators: Robert Brunner, University of Illinois Alex Gray, Georgia Tech Robert Nichol, Portsmouth Alex Szalay, Johns Hopkins University Science Category: AGN/quasars/radio galaxies Dollars Approved: 49297.0 Abstract: One of the hottest topics in extragalactic astronomy is the identification and census of type 2 quasars. Type 2 selection benefits enormously from the high quality imaging data afforded by the Spitzer Space Telescope since these objects are generally too obscured in the optical for efficient selection in that bandpass. We propose to develop a novel classification algorithm to aid in this endeavor. Bayesian quasar classification based on Kernel Density Estimation (Richards et al. 2004) and photometric redshift estimation (Weinstein et al. 2004) has already been shown to be very efficient in the optical using only the 5 SDSS bandpasses. Additional bandpasses, such as afforded by Spitzer−IRAC imaging, can be used to further improve this selection method and photometric redshift estimation. With appropriate tuning of our algorithms, we can meet two key goals. First is to construct a catalog of type 1 quasars in the roughly 50 square degrees of sky that currently have (or will have by the end of 2006), public data from both SDSS and Spitzer−IRAC. Such a catalog (including accurate photometric redshifts) will enable a second goal, namely more efficient type 2 quasar searches. We will improve the efficiency of type 2 quasar discovery by removing those mid−IR luminous type 1 quasars from the sample of objects that are currently being followed−up with multi−object spectroscopy on larger telescopes, and also by better isolating the type 2 quasar parameter space. We request $49927 of support to adapt our classification and photometric redshift algorithms to make use of the Spitzer−IRAC data and to publish a catalog of quasars identified by these algorithms. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 512/742 Spitzer Space Telescope − Archive Research Proposal #3284 Optical−IR SEDs of SDSS Quasars in the Archival Spitzer−FLS Data Principal Investigator: Gordon Richards Institution: Princeton University Technical Contact: Gordon Richards, Johns Hopkins University Co−Investigators: Patrick Hall, Princeton University Sarah Gallagher, UCLA Dean Hines, Space Science Institute Mark Lacy, SSC Lisa Storrie−Lombardi, SSC Daniel Vanden Berk, Pittsburgh Sebastian Jester, Fermilab Scott Anderson, University of Washington Xiaohui Fan, University of Arizona Michael Strauss, Princeton University Donald Schneider, Penn State Donald York, University of Chicago Science Category: AGN/quasars/radio galaxies Dollars Approved: 49894.0 Abstract: We propose to study the relationship between the optical/UV and mid− to far−IR for normal quasars, dust reddened quasars, and broad absorption line quasars. This project builds on earlier quasar spectral energy distribution (SED) work, mostly using the PG sample of quasars, by extending our knowledge of the IR properties of quasars to higher redshifts and lower luminosities. Our sample will consist of ~40 spectroscopically confirmed quasars (with ~2 Angstrom resolution optical spectra) and ~160 fainter photometrically selected quasars (with accurate photometric redshifts) from the Sloan Digital Sky Survey that are in the Spitzer First Look Survey area. We will extract the IRAC and MIPS photometry for all these spectroscopically confirmed and photometrically selected quasars. Such a sample will contribute significantly to our knowledge of the UV to far−IR SEDs of normal quasars, which will be useful as a basis for comparison with unusual or obscured quasars. In addition we will probe the nature of the reprocessed dust emission through the detailed shape of the IR bump and investigate the AGN−starburst connection with the aid of very long−wavelength data where the starburst contribution is expected to be greatest. Thursday March 25, 2010 xgal_covers.txt 256/371
Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 513/742 Spitzer Space Telescope − Archive Research Proposal #3433 The Far−Infrared Properties of A Large Radio Selected Sample in the SIRTF−FLS Principal Investigator: Eric Richards Institution: Talaldega College Technical Contact: Eric Richards, Talaldega College Co−Investigators: Don Walters, South Carolina State University Science Category: AGN/quasars/radio galaxies Dollars Approved: 37553.0 Abstract: We propose to analyze the infrared properties of a large sample of 10,000 radio sources within the principal SIRTF−First Look Survey. Our focus primarily will be on the far infrared photometry at 24, 70, and 160 microns of these radio objects selected at 1.4 GHz above 80 muJy. This study will constitute the single largest microJy radio sample to date allowing for characterization of their optical identifications, and source of radio−FIR radiation as primarily star−forming and/or non−thermal via AGN activity. We will create the following data products for dissemination to the astronomical community: 1) a catalog of 6,000 radio objects identified in the SIRTF−FLS survey above 80 muJy complete with radio, optical, X−ray, near and far infrared photometry and redshifts (or limits) where possible. 2) An aggregate and bi−variate radio and far−infrared luminosity function constructed from the complete sample of 3565 radio sources between redshifts of 0.1 to 3 to an accuracy of 10% or better. 3) An angular correlation function and study of the clustering properties of radio and infrared selected galaxies over spatial distances of 1−100 Mpc. 4) A list of unusual objects based on extreme colors and radio/optical properties for follow−up. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 514/742 Spitzer Space Telescope − General Observer Proposal #50087 Is the Structure of the Dusty Torus Related to the Physics of the Accretion Disk? Principal Investigator: Gordon Richards Institution: Johns Hopkins University Technical Contact: Gordon Richards, Johns Hopkins University Co−Investigators: Moshe Elitzur, University of Kentucky Sarah Gallagher, UCLA/UWO Dean Hines, Space Science Institute Zeljko Ivezic, University of Washington Martin Elvis, SAO Rajesh Deo, Drexel University Science Category: AGN/quasars/radio galaxies Observing Modes: IrsStare Hours Approved: 19.3 Abstract: We propose to investigate the question ‘‘Is the structure of the dusty torus related to the physics of the accretion disk’?’’ using low resolution IRS spectra of a sample of high−redshift quasars. We will observe a representative sample of 18 bright SDSS quasars with 1.6
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Extragalactic abstracts - IRSA - California Institute of Technology

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