Extragalactic abstracts - IRSA - California Institute of Technology

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Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 403/742 Spitzer Space Telescope − Directors Discretionary Time Proposal #269 AGN Spectral Energy Distributions of GLAST Telescope Network Program Objects II Principal Investigator: Jeff Adkins Institution: Deer Valley High School Technical Contact: Mark Lacy, Spitzer Science Center Co−Investigators: Linda Stefaniak, Allentown High School Steve Rapp, Linwood Holton Governor’s School Mark Lacy, Spitzer Science Center Science Category: AGN/Quasars/Radio Galaxies Observing Modes: IracMap MipsPhot Hours Approved: 0.4 Abstract: The Gamma−Ray Large Area Space Telescope (GLAST) has a proposed observing list that includes AGNs and Polars bright enough to be observed optically by amateurs and students. This observing list is maintained by the "GLAST Telescope Network" (GTN) and includes a number of objects that have yet to be observed by the Spitzer Space Telescope. In the first year of the Spitzer Teacher Observing Program, our project observed one of these objects (4C 29.45) with the Spitzer MIPS and the IRAC instruments as well as ground based instruments. These observations were used to determine its Spectral Energy Distribution (SED), which was compared to a model of disk emission in order to determine if there was a component of the SED due to synchrotron radiation induced by the jets. In this proposal we will observe another target from the list and expand our efforts to create simultaneous observations through radio telescopes, optical telescopes (large and small), and other instruments as the opportunity arises. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 404/742 Spitzer Space Telescope − General Observer Proposal #20475 The Einstein Cross Quasar: The Hottest Dust Around a Quasar in the Universe? Principal Investigator: Eric Agol Institution: University of Washington Technical Contact: Eric Agol, University of Washington Co−Investigators: Varoujan Gorjian, Jet Propulsion Laboratory Amy Kimball, University of Washington Science Category: AGN/quasars/radio galaxies Observing Modes: IracMap IrsStare Hours Approved: 4.0 Abstract: The Einstein Cross radio−quiet quasar images show microlensing by stars in the lens galaxy which allows constraints to be placed on the size of the ultraviolet and infrared emission regions. Preliminary ground−based data indicates that this quasar has the hottest dust of any known quasar. We propose to measure the mid−infrared spectral energy distribution with IRAC and IRS to determine whether most of the dust emission comes from dust near the sublimation temperature. In addition, we will look for the presence of PAH features. These measurements, in conjunction with microlensing measurements, will provide a probe of accretion disk physics, an indication of the dust composition, and an estimate of the size of the infrared emission region which can be used in simulations of lensing by dark matter substructure. Thursday March 25, 2010 xgal_covers.txt 202/371
Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 405/742 Spitzer Space Telescope − General Observer Proposal #3124 A census of AGN activity in the local Universe Principal Investigator: David Alexander Institution: Instiute of Astronomy, University of Cambridge Technical Contact: David Alexander, Durham University Co−Investigators: Andrew Fabian, Institute of Astronomy Franz Bauer, Institute of Astronomy Kazushi Iwasawa, Institute of Astronomy Science Category: AGN/quasars/radio galaxies Observing Modes: IrsStare MipsPhot Hours Approved: 18.1 Abstract: It is well established that almost all galaxies harbor a central super−massive black hole (SMBHs). However, how many of these SMBHs are actively accreting? The answer to this question can provide constraints on the growth of local SMBHs, form the basis for determining the definitive obscured/unobscured local AGN ratio, better define the fraction of nearby galaxies that harbor AGNs, and further our understanding of the AGN contribution to the infrared and X−ray backgrounds. Amazingly, this fundamental question has not yet been fully answered. We propose here for IRS high−resolution spectroscopy and MIPS 24 micron imaging of a distance−limited (50% of luminous AGNs are unidentified in even in the deepest X−ray surveys, most likely due to Compton−thick or near Compton−thick absorption of the intrinsic X−ray emission. These AGNs should be present in deep Spitzer surveys due to thermally reprocessed AGN emission by dust in the absorbing material. Here we propose for Spitzer−IRS spectroscopy of 14 candidate z
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Extragalactic abstracts - IRSA - California Institute of Technology

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