Extragalactic abstracts - IRSA - California Institute of Technology
Extragalactic abstracts - IRSA - California Institute of Technology
Extragalactic abstracts - IRSA - California Institute of Technology
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Spitzer_Approved_<strong>Extragalactic</strong><br />
Mar 25, 10 16:24 Page 443/742<br />
Spitzer Space Telescope − Guaranteed Time Observer Proposal #30447<br />
IRS spectroscopy <strong>of</strong> "type−3" quasars<br />
Principal Investigator: Giovanni Fazio<br />
Institution: Harvard−Smithsonian Astrophysical Observatory<br />
Technical Contact: Mark Lacy, Spitzer Science Center<br />
Co−Investigators:<br />
Mark Lacy, Spitzer Science Center<br />
Pauline Barmby, CfA<br />
Science Category: AGN/quasars/radio galaxies<br />
Observing Modes: IrsStare<br />
Hours Approved: 4.5<br />
Abstract:<br />
We wish to obtain IRS spectra <strong>of</strong> a sample <strong>of</strong> objects which have the mid−infrared<br />
colors <strong>of</strong> AGN and mid−infared luminosities <strong>of</strong> quasars, but which lack AGN<br />
indicators in their optical spectra. Three <strong>of</strong> these objects have low−ionization<br />
optical spectra, and two lack emission lines but are most likely at z~1−2. We<br />
wish to investigate the possibility that these ‘‘type−3’’ quasars are an early<br />
phase in the development <strong>of</strong> AGN, perhaps hidden by a starburst triggered by the<br />
same merger event which triggered their AGN activity. Other possibilities<br />
include unusual starbursts with large amounts <strong>of</strong> warm dust, or otherwise normal<br />
AGN which lack a narrow line region. IRS spectra will allow us to distinguish<br />
between these different scenarios.<br />
Spitzer_Approved_<strong>Extragalactic</strong><br />
Printed_by_SSC<br />
Mar 25, 10 16:24 Page 444/742<br />
Spitzer Space Telescope − Guaranteed Time Observer Proposal #40072<br />
Spectral Energy Distributions <strong>of</strong> the High−Redshift 3CR Sources: Testing<br />
Unification<br />
Principal Investigator: Giovanni Fazio<br />
Institution: Smithsonian Astrophysical Observatory<br />
Technical Contact: Steven Willner, Smithsonian Astrophysical Observatory<br />
Co−Investigators:<br />
Martin Haas, Astronomisches Institut Universitat, Bochum, Germa<br />
Belinda Wilkes, Harvard−Smithsonian Center for Astrophysics<br />
Jiasheng Huang, Harvard−Smithsonian Center for Astrophysics<br />
Mark Lacy, Spitzer Science Center<br />
Daniel Stern, Jet Propulsion Lab<br />
Gillian Wilson, Spitzer Science Center<br />
Science Category: AGN/quasars/radio galaxies<br />
Observing Modes: IracMap IrsPeakupImage MipsPhot<br />
Hours Approved: 19.9<br />
Abstract:<br />
We propose IRAC, IRS peakup, and MIPS photometry <strong>of</strong> a complete sample <strong>of</strong><br />
high−redshift (z>1) radio galaxies and quasars. The sample contains 63 massive<br />
and powerful radio galaxies and quasars from the 3CR catalog, selected strictly<br />
on the basis <strong>of</strong> flux density <strong>of</strong> the radio lobes. It should therefore be an<br />
orientation−independent sample, suitable for testing AGN unification models.<br />
The observations will consist <strong>of</strong> photometry <strong>of</strong> the radio source counterpart<br />
galaxies from 3.6 to 24 microns. In addition, we will map an approximately 4<br />
arcmin region around the radio galaxy with IRAC to look for possible clusters<br />
around the radio sources. The galaxy spectral energy distributions will enable<br />
us to determine the stellar luminosity and mass <strong>of</strong> the host galaxies and the<br />
mid−infrared luminosity <strong>of</strong> AGN−related power law emission. In addition, the IRAC<br />
images will allow us to study the environment <strong>of</strong> these most massive 3CR sources.<br />
The maps will be large enough to cover the presumed galaxy clusters and deep<br />
enough to detect galaxiesat least ten times fainter than the 3CR sources.<br />
Thursday March 25, 2010 xgal_covers.txt<br />
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