Extragalactic abstracts - IRSA - California Institute of Technology

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Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 559/742 Spitzer Space Telescope − General Observer Proposal #3586 On First Infrared Light from Large−scale Quasar Jets Principal Investigator: Megan Urry Institution: Yale University Technical Contact: Yasunobu Uchiyama, ISAS/JAXA Co−Investigators: Yasunobu Uchiyama, Yale University Jeffrey Van Duyne, Yale University Laura Maraschi, Osservatorio Astronomico di Brera Fabrizio Tavecchio, Osservatorio Astronomico di Brera Chi Cheung, Brandeis University Rita Sambruna, George Mason University Tadayuki Takahashi, JAXA/ISAS Science Category: AGN/quasars/radio galaxies Observing Modes: IracMap Hours Approved: 2.5 Abstract: We propose Spitzer IRAC imaging observations to detect, for the first time, infrared emissions from the hundred−kiloparsec−scale jets of powerful quasars. From reasonable extrapolation of the measured optical flux, the bright jets that we selected are indeed detectable with Spitzer’s arcsecond imaging capability. The Spitzer observations, when combined with HST and Chandra, enable us to study simple but fundamental issues regarding the largely−unknown properties of the quasar jets. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 560/742 Spitzer Space Telescope − General Observer Proposal #30745 Spitzer Observations of the First Unbiased AGN Sample of the Local Universe Principal Investigator: Kimberly Weaver Institution: NASA GSFC Technical Contact: Lee Armus, Spitzer Science Center Co−Investigators: Richard Mushotzky, NASA GSFC Jack Tueller, NASA GSFC Eliot Malumuth, NASA GSFC Craig Markwardt, NASA GSFC Steve Kraemer, NASA GSFC Lee Armus, IPAC Science Category: AGN/quasars/radio galaxies Observing Modes: IrsStare MipsPhot Hours Approved: 9.1 Abstract: Many questions fundamental to AGN research remain unanswered because there still exists no large uniform AGN survey of the local universe. Such surveys are difficult because the majority of AGN are obscured by large amounts of dust and gas and prior astronomical samples suffer from severe selection effects. In the IR, the observed luminosities and spectral shapes are strongly affected by star formation and dust absorption and emission and there is in fact no clear consistency in IR AGN properties − Spitzer spectra show a large variety of signatures and a wide range of effective IR colors. The hard X−ray emission is the only radiation known that is both relatively unaffected by Compton−thin obscuration and is directly associated with the AGN. We propose here a "pilot study" of a new hard x−selected sample of AGN with the BAT on Swift with the goal of obtaining the first high quality IR spectral survey of an unbiased local AGN sample. These targets provide a means for insight into the IR/x−ray scatter and thus can determine the true distribution of IR properties of AGN. It is only by having an independent measure of AGN strength and total absorbing column density from a well−observed hard x−ray sample that one can untangle the complexity of the IR data. A hard x−ray survey will find all Compton thin AGN in a uniform fashion and determine their intrinsic luminosity. With these data we will search for the nonthermal continuum in the IR, constrain star formation in the galaxies, directly compare line−of−sight IR and x−ray column densities and construct non ad−hoc continuum models based on x−ray fluxes to predict the IR line ratios in gas photoionized by the AGN. Thursday March 25, 2010 xgal_covers.txt 280/371
Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 561/742 Spitzer Space Telescope − General Observer Proposal #50588 Spitzer Observations to Complete the First Unbiased AGN Sample of the Local Universe Principal Investigator: Kimberly Weaver Institution: NASA GSFC Technical Contact: Kimberly Weaver, NASA GSFC Co−Investigators: Richard Mushotzky, NASA/GSFC Jack Tueller, NASA/GSFC Steve Kraemer, NASA/GSFC Craig Markwardt, NASA/GSFC Lee Armus, Caltech − IPAC Eliot Malumuth, NASA/GSFC Ciprian Berghea, Catholic University Kimberly Engle, NASA/GSFC Lisa Winter, University of Maryland Science Category: AGN/quasars/radio galaxies Observing Modes: IrsStare Hours Approved: 26.8 Abstract: Active galactic nuclei (AGNs) have been a major focus of extragalactic astronomy for decades, but because of obscuration effects, virtually all surveys for AGN based purely on optical, IR, UV or soft X−ray data have been highly biased in their selection (cf. Mushotzky 2004). Thus, to truly understand the intrinsic nature of AGN as a class, it is critical to start with an unbiased hard X−ray survey. This critical, unbiased hard X−ray survey is now available from the SWIFT Burst Alert Telescope (BAT). The BAT detects all bright AGN, whether they are obscured or not, and thus will find famous classical objects as well as previously unknown AGN. In fact, many of the BAT sources are newly discovered AGN, which have been poorly studied, if at all, at other wavelengths. We have found that these "new" AGN are under−luminous in their IR properties compared to classic AGN and thus IR−selected samples have not been representative. Our IR−weak AGN may be the most heavily obscured ones. Completing the BAT sample is critical to obtain a complete, unbiased sample of AGN properties based on hard X−ray data and to understand this new IR−under−luminous class. These data will become an invaluable addition to the Spitzer archive. Statistical conclusions drawn from classical objects are almost certain to be wrong due to inherent biases in their selection, which exclude this sample of severely absorbed, BAT−detected AGN. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 562/742 Spitzer Space Telescope − Directors Discretionary Time Proposal #246 Flaring Quasar 3C454.3 Principal Investigator: Ann Wehrle Institution: Caltech Technical Contact: Patrick Ogle, Caltech Co−Investigators: Patrick Ogle, SSC Science Category: AGN/quasars/radio galaxies Observing Modes: IracMap IrsStare MipsPhot Hours Approved: 10.3 Abstract: The quasar 3C454.3 is currently undergoing the largest optical flare in its recorded history: during the past three weeks it has exceeded even 3C273 in optical brightness. We propose to observe 3C454.3 with Spitzer IPAC, MIPS and IRS during each of their normally scheduled blocks in June, July and August 2005, and repeat observations daily. Supporting ground based data will be obtained from Palomar Mountain (approved observations on the 60" robotic telescope; A. Wehrle, PI), Colgate University, and other observatories of the international blazar monitoring teams. The Rossi X−ray Timing Explorer has already started observing as a Target of Opportunity. Thursday March 25, 2010 xgal_covers.txt 281/371
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Extragalactic abstracts - IRSA - California Institute of Technology

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