K
K. Okajima
Researcher at Nagoya University
Publications - 14
Citations - 1143
K. Okajima is an academic researcher from Nagoya University. The author has contributed to research in topics: Gravitational microlensing & Light curve. The author has an hindex of 11, co-authored 14 publications receiving 1092 citations.
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Journal ArticleDOI
OGLE 2003-BLG-235/MOA 2003-BLG-53: A Planetary Microlensing Event
Ian A. Bond,Andrzej Udalski,M. Jaroszyński,M. Jaroszyński,Nicholas J. Rattenbury,Bohdan Paczynski,Igor Soszyński,Lukasz Wyrzykowski,Michał K. Szymański,M. Kubiak,O. Szewczyk,O. Szewczyk,K. Żebruń,Grzegorz Pietrzyński,Grzegorz Pietrzyński,Fumio Abe,David P. Bennett,S. Eguchi,Y. Furuta,John B. Hearnshaw,Koki Kamiya,P. M. Kilmartin,Y. Kurata,Kimiaki Masuda,Yutaka Matsubara,Yasushi Muraki,S. Noda,K. Okajima,Takashi Sako,T. Sekiguchi,Denis J. Sullivan,Takahiro Sumi,P. J. Tristram,T. Yanagisawa,Philip Yock +34 more
TL;DR: In this paper, a short-duration (~7 days) low-amplitude deviation in the light curve due to a single-lens profile was observed in both the MOA (Microlensing Observations in Astrophysics) and OGLE (Optical Gravitational Lensing Experiment) survey observations.
Journal ArticleDOI
OGLE 2003-BLG-235/MOA 2003-BLG-53: A planetary microlensing event
Ian A. Bond,Andrzej Udalski,M. Jaroszynski,Nicholas J. Rattenbury,Bohdan Paczynski,Igor Soszyński,L. Wyrzykowski,Michał K. Szymański,M. Kubiak,O. Szewczyk,K. Zebrun,Grzegorz Pietrzyński,Fumio Abe,David P. Bennett,S. Eguchi,Y. Furuta,John B. Hearnshaw,Kisaku Kamiya,P. M. Kilmartin,Y. Kurata,Kimiaki Masuda,Yutaka Matsubara,Yasushi Muraki,S. Noda,K. Okajima,T. K. Sako,Tomohiko Sekiguchi,Denis J. Sullivan,Takahiro Sumi,P. J. Tristram,Toshifumi Yanagisawa,Philip Yock +31 more
TL;DR: In this paper, a short duration (~7 days) low amplitude deviation in the light curve due to a single lens profile was observed in both the MOA and OGLE survey observations.
Journal ArticleDOI
MOA-cam3: a wide-field mosaic CCD camera for a gravitational microlensing survey in New Zealand
Takashi Sako,Tomohiko Sekiguchi,M. Sasaki,K. Okajima,Fumio Abe,Ian A. Bond,John B. Hearnshaw,Yoshitaka Itow,K. Kamiya,P. M. Kilmartin,Kimiaki Masuda,Yutaka Matsubara,Yasushi Muraki,Nicholas J. Rattenbury,D. J. Sullivan,Takahiro Sumi,Paul J. Tristram,T. Yanagisawa,Philip Yock +18 more
TL;DR: In this paper, a wide field mosaic CCD camera, MOA-cam3, is mounted at the prime focus of the Microlensing Observations in Astrophysics (MOA) 1.8m telescope.
Journal ArticleDOI
MOA 2003-BLG-37: A bulge jerk-parallax microlens degeneracy
Byeong-Gon Park,Darren L. DePoy,B. S. Gaudi,Andrew Gould,C. Han,C. Han,Richard W. Pogge,Fumio Abe,David P. Bennett,Ian A. Bond,S. Eguchi,Y. Furuta,John B. Hearnshaw,Koki Kamiya,P. M. Kilmartin,Y. Kurata,Kimiaki Masuda,Yutaka Matsubara,Yasushi Muraki,S. Noda,K. Okajima,Nicholas J. Rattenbury,Takashi Sako,T. Sekiguchi,Denis J. Sullivan,Takahiro Sumi,P. J. Tristram,T. Yanagisawa,Philip Yock +28 more
TL;DR: In this article, the authors analyzed the Galactic bulge microlensing event MOA 2003-BLG-37 and showed that the χ2 surface has four distinct local minima induced by the "jerk-parallax" degeneracy, with pairs of solutions having projected Einstein radii E = 1.76 and 1.28 AU, respectively.
Journal ArticleDOI
Search for low-mass exoplanets by gravitational microlensing at high magnification.
Fumio Abe,David P. Bennett,Ian A. Bond,S. Eguchi,Y. Furuta,John B. Hearnshaw,Koki Kamiya,P. M. Kilmartin,Y. Kurata,Kimiaki Masuda,Yutaka Matsubara,Yasushi Muraki,S. Noda,K. Okajima,A Rakich,Nicholas J. Rattenbury,Takashi Sako,T. Sekiguchi,Denis J. Sullivan,Takahiro Sumi,P. J. Tristram,T. Yanagisawa,Philip Yock,Avishay Gal-Yam,Y. M. Lipkin,D. Maoz,Eran O. Ofek,Andrzej Udalski,O. Szewczyk,K. Zebrun,Igor Soszyński,Michał K. Szymański,M. Kubiak,Grzegorz Pietrzyński,Grzegorz Pietrzyński,Lukasz Wyrzykowski +35 more
TL;DR: Observations of the gravitational microlensing event MOA 2003- BLG-32/OGLE 2003-BLG-219 are presented, for which the peak magnification was over 500, the highest yet reported, which enabled a sensitive search for planets orbiting the lens star.