A
Alasdair Allan
Researcher at University of Exeter
Publications - 88
Citations - 3347
Alasdair Allan is an academic researcher from University of Exeter. The author has contributed to research in topics: Gravitational microlensing & Light curve. The author has an hindex of 27, co-authored 88 publications receiving 3225 citations. Previous affiliations of Alasdair Allan include European Southern Observatory & Keele University.
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Journal ArticleDOI
Frequency of solar-like systems and of ice and gas giants beyond the snow line from high-magnification microlensing events in 2005-2008
Andrew Gould,Subo Dong,B. S. Gaudi,Andrzej Udalski,Ian A. Bond,J. G. Greenhill,Rachel Street,Martin Dominik,Takahiro Sumi,Michał K. Szymański,C. Han,William H. Allen,Greg Bolt,M. Bos,G. W. Christie,Darren L. DePoy,Jack D. Drummond,Jason D. Eastman,Avishay Gal-Yam,D. Higgins,J. Janczak,Shai Kaspi,Szymon Kozłowski,C.-U. Lee,F. Mallia,Anaëlle Maury,D. Maoz,Jennie McCormick,L. A. G. Monard,D. Moorhouse,N. D. Morgan,Tim Natusch,Eran O. Ofek,Byeong-Gon Park,Richard W. Pogge,David Polishook,R. Santallo,Avi Shporer,O. Spector,G. Thornley,Jennifer C. Yee,M. Kubiak,Grzegorz Pietrzyński,Igor Soszyński,O. Szewczyk,Łukasz Wyrzykowski,Krzysztof Ulaczyk,Radosław Poleski,Fumio Abe,David P. Bennett,C. S. Botzler,D. Douchin,M. Freeman,Akihiko Fukui,K. Furusawa,John B. Hearnshaw,S. Hosaka,Yoshitaka Itow,K. Kamiya,P. M. Kilmartin,A. Korpela,W. Lin,C. H. Ling,S. Makita,Kimiaki Masuda,Yutaka Matsubara,N. Miyake,Yasushi Muraki,M. Nagaya,K. Nishimoto,Kouji Ohnishi,Teppei Okumura,Y. C. Perrott,L. Philpott,Nicholas J. Rattenbury,To. Saito,Takashi Sako,Denis J. Sullivan,W. L. Sweatman,P. J. Tristram,E. von Seggern,P. C. M. Yock,Michael D. Albrow,V. Batista,J. P. Beaulieu,S. Brillant,J. Caldwell,J. J. Calitz,Arnaud Cassan,Andrew A. Cole,K. W. Cook,C. Coutures,S. Dieters,D. Dominis Prester,J. Donatowicz,Pascal Fouqué,K. Hill,M. Hoffman,Francisco Jablonski,Stephen R. Kane,N. Kains,D. Kubas,J.-B. Marquette,R. M. Martin,Eder Martioli,P. J. Meintjes,J. Menzies,Ettore Pedretti,K. R. Pollard,K. C. Sahu,C. Vinter,J. Wambsganss,R. A. Watson,Andrew Williams,M. Zub,Alasdair Allan,M. F. Bode,D. M. Bramich,Martin Burgdorf,N. Clay,S. Fraser,E. Hawkins,Keith Horne,E. Kerins,T. A. Lister,C. Mottram,E. S. Saunders,Colin Snodgrass,Iain A. Steele,Yiannis Tsapras,U. G. Jørgensen,Timo Anguita,Valerio Bozza,S. Calchi Novati,K. Harpsøe,Tobias C. Hinse,M. Hundertmark,P. Kjærgaard,C. Liebig,C. Liebig,Luigi Mancini,G. Masi,M. Mathiasen,Sohrab Rahvar,Davide Ricci,Gaetano Scarpetta,John Southworth,Jean Surdej,Christina C. Thöne,Christina C. Thöne +149 more
TL;DR: In this paper, the authors presented the first measurement of the planet frequency beyond the "snow line," for the planet-to-star mass-ratio interval during 2005-2008 microlensing events during the survey-plus-follow-up high-magnification channel.
Journal ArticleDOI
Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing
B. S. Gaudi,David P. Bennett,Andrzej Udalski,Andrew Gould,G. W. Christie,D. Maoz,Subo Dong,Jennie McCormick,Michał K. Szymański,P. J. Tristram,S. Nikolaev,Bohdan Paczynski,M. Kubiak,Grzegorz Pietrzyński,Grzegorz Pietrzyński,Igor Soszyński,O. Szewczyk,Krzysztof Ulaczyk,Łukasz Wyrzykowski,Łukasz Wyrzykowski,Darren L. DePoy,C. Han,Shai Kaspi,C.-U. Lee,F. Mallia,Tim Natusch,Richard W. Pogge,Byeong-Gon Park,Fumio Abe,Ian A. Bond,C. S. Botzler,Akihiko Fukui,John B. Hearnshaw,Yoshitaka Itow,Kisaku Kamiya,A. V. Korpela,P. M. Kilmartin,W. Lin,Kimiaki Masuda,Yutaka Matsubara,M. Motomura,Yasushi Muraki,Shota Nakamura,Teppei Okumura,Kouji Ohnishi,Nicholas J. Rattenbury,Takashi Sako,To. Saito,Shuji Sato,L. Skuljan,Denis J. Sullivan,Takahiro Sumi,Winston L. Sweatman,Philip Yock,Michael D. Albrow,Alasdair Allan,J.-P. Beaulieu,Martin Burgdorf,K. H. Cook,C. Coutures,Martin Dominik,S. Dieters,Pascal Fouqué,J. G. Greenhill,Keith Horne,Iain A. Steele,Yiannis Tsapras,Brian Chaboyer,A. Crocker,Stephan Frank,Bruce Macintosh +70 more
TL;DR: Two planets with masses that could not have been detected with other techniques are identified; their discovery from only six confirmed microlensing planet detections suggests that solar system analogs may be common.
Journal ArticleDOI
MOA-2009-BLG-387Lb: a massive planet orbiting an M dwarf
V. Batista,Andrew Gould,S. Dieters,Subo Dong,Ian A. Bond,J. P. Beaulieu,D. Maoz,B. Monard,G. W. Christie,Jennie McCormick,Michael D. Albrow,Keith Horne,Yiannis Tsapras,Martin Burgdorf,Martin Burgdorf,S. Calchi Novati,Jesper Skottfelt,J. A. R. Caldwell,Szymon Kozłowski,D. Kubas,D. Kubas,B. S. Gaudi,Chang S. Han,David P. Bennett,J. An,Fumio Abe,C. S. Botzler,D. Douchin,M. Freeman,Akihiko Fukui,K. Furusawa,John B. Hearnshaw,S. Hosaka,Yoshitaka Itow,Kisaku Kamiya,P. M. Kilmartin,A. V. Korpela,W. Lin,C. H. Ling,S. Makita,Kimiaki Masuda,Yutaka Matsubara,N. Miyake,Yasushi Muraki,M. Nagaya,K. Nishimoto,Kouji Ohnishi,Teppei Okumura,Y. C. Perrott,Nicholas J. Rattenbury,To. Saito,Denis J. Sullivan,Takahiro Sumi,Winston L. Sweatman,P. J. Tristram,E. von Seggern,Philip Yock,S. Brillant,J. J. Calitz,Arnaud Cassan,Andrew A. Cole,K. H. Cook,C. Coutures,D. Dominis Prester,J. Donatowicz,J. G. Greenhill,M. Hoffman,Francisco Jablonski,Stephen R. Kane,N. Kains,N. Kains,J. B. Marquette,R. M. Martin,Eder Martioli,P. J. Meintjes,J. W. Menzies,Ettore Pedretti,K. R. Pollard,Kailash C. Sahu,C. Vinter,Joachim Wambsganss,R. D. Watson,Andrew Williams,M. Zub,M. Zub,William H. Allen,Greg Bolt,M. Bos,Darren L. DePoy,Jack D. Drummond,Jason D. Eastman,Avishay Gal-Yam,E. Gorbikov,E. Gorbikov,D. Higgins,J. Janczak,Shai Kaspi,Shai Kaspi,C.-U. Lee,F. Mallia,Anaëlle Maury,L. A. G. Monard,D. Moorhouse,N. D. Morgan,Tim Natusch,Eran O. Ofek,Byeong-Gon Park,Richard W. Pogge,David Polishook,R. Santallo,Avi Shporer,O. Spector,G. Thornley,Jennifer C. Yee,Valerio Bozza,P. Browne,Martin Dominik,Martin Dominik,Stefan Dreizler,F. Finet,M. Glitrup,Frank Grundahl,K. B. W. Harpsøe,Frederic V. Hessman,Tobias C. Hinse,Tobias C. Hinse,M. Hundertmark,U. G. Jørgensen,U. G. Jørgensen,C. Liebig,C. Liebig,G. Maier,Luigi Mancini,Luigi Mancini,M. Mathiasen,Sohrab Rahvar,Davide Ricci,Gaetano Scarpetta,John Southworth,Jean Surdej,F. Zimmer,F. Zimmer,Alasdair Allan,D. M. Bramich,Colin Snodgrass,Colin Snodgrass,Iain A. Steele,Rachel Street,Rachel Street +148 more
TL;DR: In this article, the authors reported the discovery of a planet with a high planet-to-star mass ratio in the microlensing event MOA-2009-BLG-387, which exhibited pronounced deviations over a 12-day interval.
Journal ArticleDOI
Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions
Jan Skowron,Andrzej Udalski,Andrew Gould,Subo Dong,L. A. G. Monard,C. Han,Cameron Nelson,Jennie McCormick,D. Moorhouse,G. Thornley,Anaëlle Maury,D. M. Bramich,J. G. Greenhill,Szymon Kozłowski,Szymon Kozłowski,Ian A. Bond,Radosław Poleski,L. Wyrzykowski,Krzysztof Ulaczyk,M. Kubiak,Michał K. Szymański,Grzegorz Pietrzyński,Igor Soszyński,B. S. Gaudi,Jennifer C. Yee,Li-Wei Hung,R. W. Pogge,Darren L. DePoy,C.-U. Lee,Byeong-Gon Park,William H. Allen,F. Mallia,Jack D. Drummond,Greg Bolt,Alasdair Allan,P. Browne,N. R. Clay,Martin Dominik,Martin Dominik,S. N. Fraser,Keith Horne,N. Kains,C. J. Mottram,Colin Snodgrass,Iain A. Steele,Rachel Street,Rachel Street,Yiannis Tsapras,Yiannis Tsapras,Fumio Abe,David P. Bennett,C. S. Botzler,D. Douchin,M. Freeman,Akihiko Fukui,K. Furusawa,F. Hayashi,John B. Hearnshaw,S. Hosaka,Yoshitaka Itow,Kisaku Kamiya,P. M. Kilmartin,A. V. Korpela,W. Lin,C. H. Ling,S. Makita,Kimiaki Masuda,Yutaka Matsubara,Yasushi Muraki,Takahiro Nagayama,N. Miyake,K. Nishimoto,Kouji Ohnishi,Y. C. Perrott,Nicholas J. Rattenbury,To. Saito,L. Skuljan,Denis J. Sullivan,Takahiro Sumi,Daisuke Suzuki,Winston L. Sweatman,Paul J. Tristram,K. Wada,P. C. M. Yock,J. P. Beaulieu,Pascal Fouqué,Michael D. Albrow,V. Batista,S. Brillant,John A. R. Caldwell,Arnaud Cassan,Arnaud Cassan,Andrew A. Cole,K. H. Cook,Ch. Coutures,S. Dieters,S. Dieters,D. Dominis Prester,J. Donatowicz,S. R. Kane,D. Kubas,D. Kubas,J. B. Marquette,R. M. Martin,J. W. Menzies,Kailash C. Sahu,Joachim Wambsganss,Andrew Williams,M. Zub +108 more
TL;DR: In this article, the first example of binary microlensing for which the parameter measurements can be verified (or contradicted) by future Doppler observations is presented, made possible by a confluence of two relatively unusual circumstances.
Journal ArticleDOI
Masses and Orbital Constraints for the OGLE-2006-BLG-109Lb,c Jupiter/Saturn Analog Planetary System
David P. Bennett,S. H. Rhie,Sergei Nikolaev,B. S. Gaudi,Andrzej Udalski,Andrew Gould,G. W. Christie,D. Maoz,Subo Dong,Jennie McCormick,Michał K. Szymański,P. J. Tristram,Bruce Macintosh,K. H. Cook,M. Kubiak,Grzegorz Pietrzyński,Grzegorz Pietrzyński,Igor Soszyński,O. Szewczyk,Krzysztof Ulaczyk,Łukasz Wyrzykowski,Łukasz Wyrzykowski,Darren L. DePoy,C. Han,Shai Kaspi,C.-U. Lee,F. Mallia,Tim Natusch,Byeong-Gon Park,R. W. Pogge,David Polishook,Fumio Abe,Ian A. Bond,C. S. Botzler,Akihiko Fukui,John B. Hearnshaw,Yoshitaka Itow,Kisaku Kamiya,A. V. Korpela,P. M. Kilmartin,W. Lin,Kimiaki Masuda,Yutaka Matsubara,M. Motomura,Yasushi Muraki,Shota Nakamura,Teppei Okumura,Kouji Ohnishi,Y. C. Perrott,Nicholas J. Rattenbury,Takashi Sako,To. Saito,Susumu Sato,L. Skuljan,Denis J. Sullivan,Takahiro Sumi,Winston L. Sweatman,Philip Yock,Michael D. Albrow,Alasdair Allan,J. P. Beaulieu,D. M. Bramich,Martin Burgdorf,Martin Burgdorf,C. Coutures,Martin Dominik,S. Dieters,Pascal Fouqué,J. G. Greenhill,Keith Horne,Colin Snodgrass,Iain A. Steele,Yiannis Tsapras,RoboNet Collaborations,Brian Chaboyer,A. Crocker,and S. Frank +76 more
TL;DR: The OGLE-2006-BLG-109Lb,c was the first double planet system discovered with the gravitational microlensing method as mentioned in this paper, which was the only multi-planet system discovered by any method with measured masses for the star and both planets.