Kmtnet: a network of 1.6 m wide-field optical telescopes installed at three southern observatories
Seung-Lee Kim,Chung-Uk Lee,Byeong-Gon Park,Dong-Jin Kim,Sang-Mok Cha,Yongseok Lee,Cheongho Han,Moo-Young Chun,In-Soo Yuk +8 more
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The Korea Microlensing Telescope Network (KMTNet) as mentioned in this paper is a wide-field photometric system installed by the Korea Astronomy and Space Science Institute (KASI).Abstract:
The Korea Microlensing Telescope Network (KMTNet) is a wide-field photometric system installed by the Korea Astronomy and Space Science Institute (KASI). Here, we present the overall technical specifications of the KMTNet observation system, test observation results, data transfer and image processing procedure, and finally, the KMTNet science programs. The system consists of three 1.6 m wide-field optical telescopes equipped with mosaic CCD cameras of 18k by 18k pixels. Each telescope provides a 2.0 by 2.0 square degree field of view. We have finished installing all three telescopes and cameras sequentially at the Cerro-Tololo Inter-American Observatory (CTIO) in Chile, the South African Astronomical Observatory (SAAO) in South Africa, and the Siding Spring Observatory (SSO) in Australia. This network of telescopes, which is spread over three different continents at a similar latitude of about -30 degrees, enables 24-hour continuous monitoring of targets observable in the Southern Hemisphere. The test observations showed good image quality that meets the seeing requirement of less than 1.0 arcsec in I-band. All of the observation data are transferred to the KMTNet data center at KASI via the international network communication and are processed with the KMTNet data pipeline. The primary scientific goal of the KMTNet is to discover numerous extrasolar planets toward the Galactic bulge by using the gravitational microlensing technique, especially earth-mass planets in the habitable zone. During the non-bulge season, the system is used for wide-field photometric survey science on supernovae, asteroids, and external galaxies.read more
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Journal ArticleDOI
The zwicky transient facility: System overview, performance, and first results
Eric C. Bellm,Shrinivas R. Kulkarni,Matthew J. Graham,Richard Dekany,Roger M. H. Smith,Reed Riddle,Frank J. Masci,George Helou,Thomas A. Prince,Scott M. Adams,Cristina Barbarino,Tom A. Barlow,James Bauer,Ron Beck,Justin Belicki,Rahul Biswas,Nadejda Blagorodnova,Dennis Bodewits,Bryce Bolin,V. Brinnel,Tim Brooke,Brian D. Bue,Mattia Bulla,Rick Burruss,S. Bradley Cenko,S. Bradley Cenko,Chan-Kao Chang,Andrew J. Connolly,Michael W. Coughlin,John Cromer,Virginia Cunningham,Kaushik De,Alex Delacroix,Vandana Desai,Dmitry A. Duev,Gwendolyn Eadie,Tony L. Farnham,Michael Feeney,Ulrich Feindt,David Flynn,Anna Franckowiak,Sara Frederick,Christoffer Fremling,Avishay Gal-Yam,Suvi Gezari,Matteo Giomi,Daniel A. Goldstein,V. Zach Golkhou,Ariel Goobar,Steven Groom,Eugean Hacopians,David Hale,John Henning,Anna Y. Q. Ho,David Hover,Justin Howell,Tiara Hung,Daniela Huppenkothen,David Imel,Wing-Huen Ip,Wing-Huen Ip,Željko Ivezić,Edward Jackson,Lynne Jones,Mario Juric,Mansi M. Kasliwal,Shai Kaspi,Stephen Kaye,Michael S. P. Kelley,Marek Kowalski,Emily Kramer,Thomas Kupfer,Thomas Kupfer,Walter Landry,Russ R. Laher,Chien De Lee,Hsing Wen Lin,Hsing Wen Lin,Zhong-Yi Lin,Ragnhild Lunnan,Ashish Mahabal,Peter H. Mao,Adam A. Miller,Adam A. Miller,Serge Monkewitz,Patrick J. Murphy,Chow-Choong Ngeow,Jakob Nordin,Peter Nugent,Peter Nugent,Eran O. Ofek,Maria T. Patterson,Bryan E. Penprase,Michael Porter,L. Rauch,Umaa Rebbapragada,Daniel J. Reiley,Mickael Rigault,Hector P. Rodriguez,Jan van Roestel,Ben Rusholme,J. V. Santen,Steve Schulze,David L. Shupe,Leo Singer,Leo Singer,Maayane T. Soumagnac,Robert Stein,Jason Surace,Jesper Sollerman,Paula Szkody,Francesco Taddia,Scott Terek,Angela Van Sistine,Sjoert van Velzen,W. Thomas Vestrand,Richard Walters,Charlotte Ward,Quanzhi Ye,Po-Chieh Yu,Lin Yan,Jeffry Zolkower +121 more
TL;DR: The Zwicky Transient Facility (ZTF) as mentioned in this paper is a new optical time-domain survey that uses the Palomar 48 inch Schmidt telescope, which provides a 47 deg^2 field of view and 8 s readout time, yielding more than an order of magnitude improvement in survey speed relative to its predecessor survey.
Journal ArticleDOI
The X-ray counterpart to the gravitational-wave event GW170817
Eleonora Troja,Eleonora Troja,Luigi Piro,H. van Eerten,Ryan Wollaeger,Myungshin Im,O. D. Fox,Nathaniel R. Butler,S. B. Cenko,S. B. Cenko,T. Sakamoto,Chris L. Fryer,Roberto Ricci,A. Y. Lien,A. Y. Lien,R. E. Ryan,Oleg Korobkin,Selyeong Lee,J. M. Burgess,William H. Lee,Alan M. Watson,Changsu Choi,Stefano Covino,P. D'Avanzo,Christopher J. Fontes,J. Becerra González,J. Becerra González,H. G. Khandrika,J. H. Kim,Seung-Lee Kim,C.-U. Lee,Hyung Mok Lee,Alexander Kutyrev,Alexander Kutyrev,G. Lim,R. Sanchez-Ramirez,Sylvain Veilleux,M. H. Wieringa,Y.Y. Yoon +38 more
TL;DR: The detection of X-ray emission at a location coincident with the kilonova transient provides the missing observational link between short γ-ray bursts and gravitational waves from neutron-star mergers, and gives independent confirmation of the collimated nature of the γ,ray-burst emission.
Journal ArticleDOI
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. VI. Age and abundance structure of the stellar populations in the central sub-kpc of the Milky Way
Thomas Bensby,Sofia Feltzing,Andrew Gould,Andrew Gould,Andrew Gould,Jennifer C. Yee,Jennifer A. Johnson,Martin Asplund,Jorge Melendez,Sara Lucatello,L. M. Howes,Andrew McWilliam,Andrzej Udalski,Michał K. Szymański,Igor Soszyński,Radosław Poleski,Radosław Poleski,A. Wyrzykowski,Krzysztof Ulaczyk,Krzysztof Ulaczyk,S. Kozlowski,P. Pietrukowicz,Jan Skowron,P. Mróz,J. M. Pawlak,Fumio Abe,Yuichiro Asakura,Aparna Bhattacharya,Ian A. Bond,David P. Bennett,Yuki Hirao,Masayuki Nagakane,Naoki Koshimoto,Takahiro Sumi,Daisuke Suzuki,P. J. Tristram +35 more
TL;DR: In this paper, a detailed elemental abundance study of 90 F and G dwarfs, turn-off, and subgiant stars in the Galactic bulge has been presented, based on high-resolution spectra acquired during gravitational microlensing events.
Journal ArticleDOI
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. VI. Age and abundance structure of the stellar populations in the central sub-kpc of the Milky Way
Thomas Bensby,Sofia Feltzing,Andrew Gould,Jennifer C. Yee,Jennifer A. Johnson,Martin Asplund,Jorge Melendez,S. Lucatello,L. M. Howes,Andrew McWilliam,Andrzej Udalski,Michał K. Szymański,Igor Soszyński,Radosław Poleski,Łukasz Wyrzykowski,K. Ulaczyk,S. Kozlowski,P. Pietrukowicz,Jan Skowron,P. Mróz,Michał Pawlak,Fumio Abe,Yuichiro Asakura,A. Bhattacharya,Ian A. Bond,David P. Bennett,Y. Hirao,M. Nagakane,N. Koshimoto,Takahiro Sumi,Daisuke Suzuki,P. J. Tristram +31 more
TL;DR: A detailed elemental abundance study of 90 F and G dwarfs, turn-off and subgiant stars in the Galactic bulge has been performed in this paper, and the results strengthen the observational evidence that support the idea of a secular origin for the galactic bulge, formed out of the other main Galactic stellar populations present in the central regions of our Galaxy.
Journal ArticleDOI
Predictions of the WFIRST Microlensing Survey. I. Bound Planet Detection Rates
Matthew T. Penny,B. Scott Gaudi,Eamonn Kerins,Nicholas J. Rattenbury,Shude Mao,Annie C. Robin,Sebastiano Calchi Novati +6 more
TL;DR: The Wide Field InfraRed Survey Telescope (WFIRST) was chosen as the top-priority large space mission of the 2010 astronomy and astrophysics decadal survey in order to study dark energy via a wide field imaging survey, to study exoplanets via a microlensing survey, and to enable a guest observer program as mentioned in this paper.
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