R
Ragnhild Lunnan
Researcher at Stockholm University
Publications - 169
Citations - 13348
Ragnhild Lunnan is an academic researcher from Stockholm University. The author has contributed to research in topics: Supernova & Galaxy. The author has an hindex of 57, co-authored 159 publications receiving 10627 citations. Previous affiliations of Ragnhild Lunnan include Swinburne University of Technology & CFA Institute.
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Journal ArticleDOI
The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample
Daniel Scolnic,David O. Jones,Armin Rest,Armin Rest,Yen-Chen Pan,Ryan Chornock,Ryan J. Foley,M. E. Huber,Richard Kessler,Gautham Narayan,Adam G. Riess,Adam G. Riess,Steven A. Rodney,Edo Berger,D. Brout,Peter Challis,Maria R. Drout,Douglas P. Finkbeiner,Ragnhild Lunnan,Robert P. Kirshner,N. E. Sanders,Edward F. Schlafly,Stephen J. Smartt,Christopher W. Stubbs,John L. Tonry,W. M. Wood-Vasey,Michael Foley,J. Hand,Elizabeth N. Johnson,W. S. Burgett,K. C. Chambers,Peter W. Draper,Klaus W. Hodapp,Nick Kaiser,R. P. Kudritzki,E. A. Magnier,Nigel Metcalfe,F. Bresolin,E. E. E. Gall,Rubina Kotak,M. McCrum,K. W. Smith +41 more
TL;DR: Scolnic et al. as discussed by the authors presented optical light curves, redshifts, and classifications for 365 spectroscopically confirmed Type Ia supernovae (SNe Ia) discovered by the Pan-STARRS1 (PS1) Medium Deep Survey.
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 Zwicky Transient Facility: Science Objectives
Matthew J. Graham,Shrinivas R. Kulkarni,Eric C. Bellm,Scott M. Adams,Cristina Barbarino,Nadejda Blagorodnova,Dennis Bodewits,Bryce Bolin,Patrick Brady,S. Bradley Cenko,Chan-Kao Chang,Michael W. Coughlin,Kaushik De,Gwendolyn Eadie,Tony L. Farnham,Ulrich Feindt,Anna Franckowiak,Christoffer Fremling,Avishay Gal-Yam,Suvi Gezari,Sourav Ghosh,Daniel A. Goldstein,V. Zach Golkhou,Ariel Goobar,Anna Y. Q. Ho,Daniela Huppenkothen,Zeljko Ivezic,R. Lynne Jones,Mario Juric,David L. Kaplan,Mansi M. Kasliwal,Michael S. P. Kelley,Thomas Kupfer,Chien-De Lee,Hsing Wen Lin,Ragnhild Lunnan,Ashish Mahabal,Adam A. Miller,Chow-Choong Ngeow,Peter Nugent,Eran O. Ofek,Thomas A. Prince,L. Rauch,Jan van Roestel,Steve Schulze,Leo Singer,Jesper Sollerman,Francesco Taddia,Lin Yan,Quanzhi Ye,Po-Chieh Yu,Igor Andreoni,Tom A. Barlow,James M. Bauer,Ron Beck,Justin Belicki,Rahul Biswas,V. Brinnel,Tim Brooke,Brian D. Bue,Mattia Bulla,Kevin B. Burdge,Rick Burruss,Andrew J. Connolly,John Cromer,Virginia Cunningham,Richard Dekany,Alex Delacroix,Vandana Desai,Dmitry A. Duev,Eugean Hacopians,David Hale,George Helou,John Henning,David Hover,Lynne A. Hillenbrand,Justin Howell,Tiara Hung,David Imel,Wing-Huen Ip,Edward Jackson,Shai Kaspi,Stephen Kaye,Marek Kowalski,Emily Kramer,Michael A. Kuhn,Walter Landry,Russ R. Laher,Peter H. Mao,Frank J. Masci,Serge Monkewitz,Patrick J. Murphy,J. Nordin,Maria T. Patterson,Bryan E. Penprase,Michael Porter,Umaa Rebbapragada,Daniel J. Reiley,Reed Riddle,Mickael Rigault,Hector P. Rodriguez,Ben Rusholme,J. V. Santen,David L. Shupe,Roger M. H. Smith,Maayane T. Soumagnac,Robert Stein,Jason Surace,Paula Szkody,Scott Terek,Angela Van Sistine,Sjoert van Velzen,W. Thomas Vestrand,Richard Walters,Charlotte Ward,Chaoran Zhang,Jeffry Zolkower +116 more
TL;DR: The Zwicky Transient Facility (ZTF) as discussed by the authors is a new time domain survey employing a dedicated camera on the Palomar 48-inch Schmidt telescope with a 47 deg$^2$ field of view and 8 second readout time.
Journal ArticleDOI
Cosmological Constraints from Measurements of Type Ia Supernovae Discovered During the First 1.5 Yr of the Pan-STARRS1 Survey
Armin Rest,Daniel Scolnic,Ryan J. Foley,Ryan J. Foley,M. E. Huber,Ryan Chornock,Gautham Narayan,John L. Tonry,Edo Berger,Alicia M. Soderberg,Christopher W. Stubbs,Adam G. Riess,Robert P. Kirshner,Stephen J. Smartt,Edward F. Schlafly,S. Rodney,M. T. Botticella,D. Brout,P. Challis,Ian Czekala,Maria R. Drout,Michael J. Hudson,Michael J. Hudson,Rubina Kotak,C. Leibler,Ragnhild Lunnan,G. H. Marion,M. McCrum,Dan Milisavljevic,Andrea Pastorello,Nathan Edward Sanders,K. W. Smith,E. Stafford,David A. Thilker,Stefano Valenti,Stefano Valenti,W. M. Wood-Vasey,Zheng Zheng,W. S. Burgett,K. C. Chambers,L. Denneau,Peter W. Draper,H. Flewelling,Klaus-Werner Hodapp,Nick Kaiser,Rolf-Peter Kudritzki,Eugene A. Magnier,Nigel Metcalfe,Paul A. Price,W. E. Sweeney,Richard J. Wainscoat,Christopher Waters +51 more
TL;DR: In this article, the authors present griz P1 light curves of 146 spectroscopically confirmed Type Ia supernovae (SNe Ia; 0.03 < z < 0.65) discovered during the first 1.5 yr of the Pan-STARRS1 Medium Deep Survey.
Journal ArticleDOI
Slowly fading super-luminous supernovae that are not pair-instability explosions
Matt Nicholl,Stephen J. Smartt,Anders Jerkstrand,Cosimo Inserra,M. McCrum,Rubina Kotak,Morgan Fraser,Darryl Wright,Ting-Wan Chen,K. W. Smith,David Young,Stuart A. Sim,Stefano Valenti,Stefano Valenti,D. A. Howell,D. A. Howell,Fabio Bresolin,Rolf-Peter Kudritzki,John L. Tonry,M. E. Huber,Armin Rest,Andrea Pastorello,L. Tomasella,Enrico Cappellaro,Stefano Benetti,Seppo Mattila,Erkki Kankare,Tuomas Kangas,Giorgos Leloudas,Giorgos Leloudas,Jesper Sollerman,Francesco Taddia,Edo Berger,Ryan Chornock,Gautham Narayan,Christopher W. Stubbs,Ryan J. Foley,Ragnhild Lunnan,Alicia M. Soderberg,Nathan Edward Sanders,Dan Milisavljevic,Raffaella Margutti,Robert P. Kirshner,Robert P. Kirshner,Nancy Elias-Rosa,A. Morales-Garoffolo,S. Taubenberger,M. T. Botticella,Suvi Gezari,Yuji Urata,S. Rodney,Adam G. Riess,Daniel Scolnic,W. M. Wood-Vasey,W. S. Burgett,K. C. Chambers,H. Flewelling,Eugene A. Magnier,Nick Kaiser,Nigel Metcalfe,John Morgan,Paul A. Price,W. E. Sweeney,Christopher Waters +63 more
TL;DR: Observations of two slow-to-fade super-luminous supernovae that show relatively fast rise times and blue colours, which are incompatible with pair-instability models are reported.