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Roberto J. Assef
Researcher at Diego Portales University
Publications - 253
Citations - 16753
Roberto J. Assef is an academic researcher from Diego Portales University. The author has contributed to research in topics: Galaxy & Active galactic nucleus. The author has an hindex of 71, co-authored 240 publications receiving 15202 citations. Previous affiliations of Roberto J. Assef include Jet Propulsion Laboratory & Pontifical Catholic University of Chile.
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Journal ArticleDOI
Mid-infrared selection of active galactic nuclei with the wide-field infrared survey explorer. i. characterizing wise-selected active galactic nuclei in cosmos
Daniel Stern,Roberto J. Assef,Dominic J. Benford,Andrew Blain,Roc M. Cutri,Arjun Dey,Peter Eisenhardt,Roger L. Griffith,Thomas H. Jarrett,Sean E. Lake,Frank J. Masci,Sara Petty,S. A. Stanford,S. A. Stanford,Chao-Wei Tsai,Edward L. Wright,Lin Yan,Fiona A. Harrison,Kristin K. Madsen +18 more
TL;DR: In this article, a simple mid-infrared color criterion, W1 − W2 ≥ 0.8, was proposed to identify active galactic nucleus (AGN) candidates in the COSMOS field.
Journal ArticleDOI
Mid-Infrared Selection of AGN with the Wide-Field Infrared Survey Explorer. I. Characterizing WISE-Selected AGN in COSMOS
Daniel Stern,Roberto J. Assef,Dominic J. Benford,Andrew Blain,Roc M. Cutri,Arjun Dey,Peter Eisenhardt,Roger L. Griffith,Thomas H. Jarrett,Sean E. Lake,Frank J. Masci,Sara Petty,S. A. Stanford,Chao-Wei Tsai,Edward L. Wright,Lin Yan,Fiona A. Harrison,Kristin K. Madsen +17 more
TL;DR: In this article, a simple mid-infrared color criterion, W1-W2 \geq 0.8 (i.e., [3.4]-[4.6], was presented, which identifies 61.9 \pm 5.4 AGN candidates per deg2 to a depth of W2 = 15.0.
Journal ArticleDOI
The sloan digital sky survey-II supernova survey: technical summary
Joshua A. Frieman,Joshua A. Frieman,Bruce A. Bassett,Andrew C. Becker,Changsu Choi,D. Cinabro,F. DeJongh,Darren L. DePoy,Ben Dilday,Mamoru Doi,Peter M. Garnavich,Craig J. Hogan,Jon A. Holtzman,Myungshin Im,Saurabh Jha,Richard Kessler,Kohki Konishi,Hubert Lampeitl,John Marriner,Jennifer L. Marshall,D. McGinnis,G. Miknaitis,Robert C. Nichol,J. L. Prieto,Adam G. Riess,Adam G. Riess,Michael Richmond,Roger W. Romani,Masao Sako,Donald P. Schneider,Mathew Smith,Naohiro Takanashi,Kouichi Tokita,Kurt van der Heyden,Naoki Yasuda,Chen Zheng,Jennifer K. Adelman-McCarthy,James Annis,Roberto J. Assef,J. C. Barentine,J. C. Barentine,Ralf Bender,Roger Blandford,William N. Boroski,Malcolm N. Bremer,Howard Brewington,Chris A. Collins,Arlin P. S. Crotts,Jack Dembicky,Jason D. Eastman,Alastair C. Edge,Edmond Edmondson,Edward C. Elson,Michael E. Eyler,Alexei V. Filippenko,Ryan J. Foley,Stephan Frank,Ariel Goobar,Tina Gueth,James E. Gunn,Michael Harvanek,Michael Harvanek,Ulrich Hopp,Yutaka Ihara,Želko Ivezić,Steven M. Kahn,Jared Kaplan,Stephen B. H. Kent,Stephen B. H. Kent,William Ketzeback,S. J. Kleinman,S. J. Kleinman,Wolfram Kollatschny,Richard G. Kron,Jurek Krzesinski,D. Lamenti,Giorgos Leloudas,Huan Lin,Dan Long,John R. Lucey,Robert H. Lupton,Elena Malanushenko,Viktor Malanushenko,Russet McMillan,Javier Méndez,Christopher W. Morgan,Christopher W. Morgan,Tomoki Morokuma,Atsuko Nitta,Linda Ostman,Kaike Pan,Constance M. Rockosi,A. Kathy Romer,Pilar Ruiz-Lapuente,G. Saurage,K. Schlesinger,Stephanie A. Snedden,Jesper Sollerman,Jesper Sollerman,Chris Stoughton,Maximilian Stritzinger,Mark SubbaRao,Douglas L. Tucker,Petri Väisänen,Linda C. Watson,S. Watters,J. Craig Wheeler,Brian Yanny,Donald G. York +108 more
TL;DR: The Sloan Digital Sky Survey-II (SDSS-II) as mentioned in this paper is a multi-year project to identify and measure light curves for intermediate-redshift (0.05 < z < 0.35) Type Ia supernovae (SNe Ia) using repeated five-band imaging over an area of 300 sq. deg.
Journal ArticleDOI
Mid-Infrared Selection of Active Galactic Nuclei with the Wide-Field Infrared Survey Explorer. II. Properties of WISE-Selected Active Galactic Nuclei in the NDWFS Boötes Field
Roberto J. Assef,Daniel Stern,Christopher S. Kochanek,Andrew Blain,Mark Brodwin,Michael J. I. Brown,Emilio Donoso,Peter Eisenhardt,Buell T. Jannuzi,Thomas H. Jarrett,Thomas H. Jarrett,S. A. Stanford,S. A. Stanford,C. W. Tsai,Jingwen Wu,Lin Yan +15 more
TL;DR: In this paper, the authors presented a study of WISE selection of AGN in the 2 deg 2 COSMOS field, finding that a simple criterion W1-W2�0.8 provides a highly reliable and complete AGN sample for W2<15.05, where the W1 and W2 passbands are centered at 3.4µm and 4.6µmm, respectively.
Journal ArticleDOI
The Sloan Digital Sky Survey-II Supernova Survey: Technical Summary
Joshua A. Frieman,Bruce A. Bassett,Andrew C. Becker,Changsu Choi,D. Cinabro,F. DeJongh,Darren L. DePoy,B. Dilday,Mamoru Doi,Peter M. Garnavich,Craig J. Hogan,Jon A. Holtzman,Myungshin Im,Saurabh Jha,Richard Kessler,Kohki Konishi,H. Lampeitl,J. P. Marriner,Jennifer L. Marshall,D. McGinnis,G. Miknaitis,Robert C. Nichol,J. L. Prieto,Adam G. Riess,Michael Richmond,Roger W. Romani,Masao Sako,Donald P. Schneider,Mathew Smith,Naohiro Takanashi,Kouichi Tokita,K. van der Heyden,Naoki Yasuda,Chen Zheng,Jennifer K. Adelman-McCarthy,J. Annis,Roberto J. Assef,J. C. Barentine,Ralf Bender,Roger Blandford,William N. Boroski,M. N. Bremer,Howard Brewington,Chris A. Collins,Arlin P. S. Crotts,Jack Dembicky,Jason D. Eastman,Alastair C. Edge,E. M. Edmondson,Edward C. Elson,Michael E. Eyler,Alexei V. Filippenko,Ryan J. Foley,Stephan Frank,Ariel Goobar,T. Gueth,James E. Gunn,Mike Harvanek,Ulrich Hopp,Yutaka Ihara,Ž. Ivezić,Steven M. Kahn,Jared Kaplan,Steve Kent,William Ketzeback,S. J. Kleinman,Wolfram Kollatschny,Richard G. Kron,J. Krzesinski,D. Lamenti,Giorgos Leloudas,Huan Lin,Dan Long,John R. Lucey,Robert H. Lupton,E. Malanushenko,V. Malanushenko,R. J. McMillan,Javier Méndez,Christopher W. Morgan,Tomoki Morokuma,Atsuko Nitta,L. Ostman,Kaike Pan,C. M. Rockosi,A. K. Romer,P. Ruiz-Lapuente,G. Saurage,Katharine J. Schlesinger,S. A. Snedden,Jesper Sollerman,Christopher Stoughton,Maximilian Stritzinger,M. Subbarao,Douglas L. Tucker,Petri Väisänen,Linda C. Watson,S. Watters,John C Wheeler,B. Yanny,Donald G. York +100 more
TL;DR: The Sloan Digital Sky Survey-II (SDSS-II) as discussed by the authors is a multi-year project to identify and measure light curves for intermediate-redshift (0.05 < z < 0.35) Type Ia supernovae (SNe Ia) using repeated five-band imaging over an area of 300 sq. deg.