V
Varoujan Gorjian
Researcher at California Institute of Technology
Publications - 57
Citations - 8267
Varoujan Gorjian is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Galaxy & Active galactic nucleus. The author has an hindex of 26, co-authored 49 publications receiving 7776 citations.
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Journal ArticleDOI
The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
Giovanni G. Fazio,Joseph L. Hora,Lori E. Allen,M. L. N. Ashby,Pauline Barmby,Lynne K. Deutsch,Lynne K. Deutsch,J.-S. Huang,S. C. Kleiner,Massimo Marengo,S. T. Megeath,Gary J. Melnick,Michael A. Pahre,Brian M. Patten,J. Polizotti,Howard A. Smith,R. S. Taylor,Zhong Wang,S. P. Willner,William F. Hoffmann,Judy Pipher,William J. Forrest,C. W. McMurty,Craig R. McCreight,Mark E. McKelvey,Robert E. McMurray,David G. Koch,Samuel H. Moseley,R. G. Arendt,John Eric Mentzell,Catherine T. Marx,P. Losch,P. Mayman,W. Eichhorn,Danny J. Krebs,Murzy D. Jhabvala,Daniel Y. Gezari,D. J. Fixsen,J. Flores,K. Shakoorzadeh,R. Jungo,Claef Hakun,Lois G. Workman,Gabriel Karpati,R. Kichak,R. Whitley,S. Mann,Eric V. Tollestrup,Peter Eisenhardt,Daniel Stern,Varoujan Gorjian,Bidushi Bhattacharya,Sean Carey,Brant O. Nelson,William J. Glaccum,Mark Lacy,Patrick J. Lowrance,Seppo Laine,William T. Reach,J. A. Stauffer,Jason Surace,Gillian Wilson,Edward L. Wright,Alan W. Hoffman,George Domingo,Martin Cohen +65 more
TL;DR: The Infrared Array Camera (IRAC) is one of three focal plane instruments on the Spitzer Space Telescope as mentioned in this paper, which is a four-channel camera that obtains simultaneous broadband images at 3.6, 4.5, 5.8, and 8.0 m.
Journal ArticleDOI
Mid-Infrared Selection of Active Galaxies
Daniel Stern,Peter R. Eisenhardt,Varoujan Gorjian,Christopher Kochanek,Nelson Caldwell,Daniel J. Eisenstein,Mark Brodwin,Michael J. I. Brown,R. Cool,Arjun Dey,Paul J. Green,Buell T. Jannuzi,Stephen S. Murray,Michael A. Pahre,Steven P. Willner +14 more
TL;DR: In this article, the Spitzer Space Telescope mid-infrared colors, derived from the IRAC Shallow Survey, of nearly 10,000 spectroscopically identified sources from the AGN and Galaxy Evolution Survey, were used to identify active galaxies.
Journal ArticleDOI
Spitzer Survey of the Large Magellanic Cloud: Surveying the Agents of a Galaxy's Evolution (SAGE). I. Overview and Initial Results
Margaret Meixner,Karl D. Gordon,Remy Indebetouw,Joseph L. Hora,Barbara A. Whitney,Robert Blum,William T. Reach,Jean Philippe Bernard,Marilyn R. Meade,Brian Babler,Charles W. Engelbracht,B. Q. For,Karl Misselt,U. Vijh,Claus Leitherer,Martin Cohen,Ed Churchwell,Francois Boulanger,Jay A. Frogel,Yasuo Fukui,Jay Gallagher,Varoujan Gorjian,Jason Harris,Douglas M. Kelly,Akiko Kawamura,Soyoung Kim,William B. Latter,Suzanne C. Madden,Ciska Markwick-Kemper,Akira Mizuno,Norikazu Mizuno,Jeremy Mould,Antonella Nota,M. S. Oey,Knut Olsen,Toshikazu Onishi,Roberta Paladini,Nino Panagia,Pablo G. Pérez-González,Hirosm Shibai,Shuji Sato,Linda J. Smith,Linda J. Smith,Lister Staveley-Smith,Alexander G. G. M. Tielens,Toshiya Ueta,Toshiya Ueta,Schuyler D. Van Dyk,Kevin Volk,Michael W. Werner,Dennis Zaritsky +50 more
TL;DR: The SAGE Legacy project as discussed by the authors performed a uniform and unbiased imaging survey of the Large Magellanic Cloud (LMC; 7° × 7°) using the IRAC (3.6, 4.5, 5.8, and 8 μm) and MIPS (24, 70, and 160μm) instruments on board the Spitzer Space Telescope.
Journal ArticleDOI
The Spitzer Deep, Wide-field Survey
M. L. N. Ashby,Daniel Stern,Mark Brodwin,Roger L. Griffith,Peter R. Eisenhardt,Szymon Kozłowski,Christopher S. Kochanek,James J. Bock,Colin Borys,Kate Brand,Michael J. I. Brown,Richard J. Cool,Asantha Cooray,Steve Croft,Arjun Dey,Daniel J. Eisenstein,Anthony H. Gonzalez,Varoujan Gorjian,Norman A. Grogin,Rob Ivison,Rob Ivison,Joseph C. Jacob,Buell T. Jannuzi,A. Mainzer,Leonidas A. Moustakas,Huub Röttgering,Nick Seymour,Howard A. Smith,Spencer A. Stanford,John R. Stauffer,Ian Sullivan,W. van Breugel,Steven P. Willner,Edward L. Wright +33 more
Abstract: The Spitzer Deep, Wide-Field Survey (SDWFS) is a four-epoch infrared survey of 10 deg^(2) in the Bootes field of the NOAO Deep Wide-Field Survey using the IRAC instrument on the Spitzer Space Telescope. SDWFS, a Spitzer Cycle 4 Legacy project, occupies a unique position in the area-depth survey space defined by other Spitzer surveys. The four epochs that make up SDWFS permit-for the first time-the selection of infrared-variable and high proper motion objects over a wide field on timescales of years. Because of its large survey volume, SDWFS is sensitive to galaxies out to z ~ 3 with relatively little impact from cosmic variance for all but the richest systems. The SDWFS data sets will thus be especially useful for characterizing galaxy evolution beyond z ~ 1.5. This paper explains the SDWFS observing strategy and data processing, presents the SDWFS mosaics and source catalogs, and discusses some early scientific findings. The publicly released, full-depth catalogs contain 6.78, 5.23, 1.20, and 0.96 x 10^(5) distinct sources detected to the average 5 sigma, 4"-diameter, aperture-corrected limits of 19.77, 18.83, 16.50, and 15.82 Vega mag at 3.6, 4.5, 5.8, and 8.0 mu m, respectively. The SDWFS number counts and color-color distribution are consistent with other, earlier Spitzer surveys. At the 6 minute integration time of the SDWFS IRAC imaging, > 50% of isolated Faint Images of the Radio Sky at Twenty cm radio sources and > 80% of on-axis XBootes sources are detected out to 8.0 mu m. Finally, we present the four highest proper motion IRAC-selected sources identified from the multi-epoch imaging, two of which are likely field brown dwarfs of mid-T spectral class.
Journal ArticleDOI
Spitzer SAGE survey of the Large Magellanic Cloud III: star formation and ~1000 new candidate young stellar objects
B. A. Whitney,Marta Sewilo,Remy Indebetouw,Thomas P. Robitaille,Margaret Meixner,Karl D. Gordon,Marilyn R. Meade,Brian Babler,Jason Harris,Joseph L. Hora,S. Bracker,Matthew S. Povich,Ed Churchwell,Charles W. Engelbracht,Bi-Qing For,Bi-Qing For,Miwa Block,Karl Misselt,U. Vijh,Claus Leitherer,Akiko Kawamura,Robert Blum,Marvin L. Cohen,Yasuo Fukui,Akira Mizuno,Norikazu Mizuno,Sundar Srinivasan,Alexander G. G. M. Tielens,Kevin Volk,J.-P. Bernard,Francois Boulanger,Jay A. Frogel,J. C. Gallagher,Varoujan Gorjian,D. M. Kelly,William B. Latter,S. C. Madden,Francisca Kemper,J. R. Mould,Antonella Nota,M. S. Oey,K. A. G. Olsen,Toshikazu Onishi,Roberta Paladini,Nino Panagia,Pablo G. Pérez-González,William T. Reach,Hiroshi Shibai,Susumu Sato,Linda J. Smith,Linda J. Smith,Lister Staveley-Smith,Toshiya Ueta,S. D. Van Dyk,Michael W. Werner,M. J. Wolff,Dennis Zaritsky +56 more
TL;DR: In this article, the spectral energy distributions (SEDs) of a subset of YSOs were fitted and properties for those that were well fitted and the total mass of these well-fitted YSOIs was estimated to be approximately 2.1 × 10^6 L. The YSO population is biased toward intermediate-to high-mass and young evolutionary stages.