K
K. L. Murata
Researcher at Tokyo Institute of Technology
Publications - 17
Citations - 564
K. L. Murata is an academic researcher from Tokyo Institute of Technology. The author has contributed to research in topics: Comet & Supernova. The author has an hindex of 9, co-authored 17 publications receiving 403 citations.
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Journal ArticleDOI
J-GEM observations of an electromagnetic counterpart to the neutron star merger GW170817
Yousuke Utsumi,Masaomi Tanaka,Nozomu Tominaga,Nozomu Tominaga,Michitoshi Yoshida,Sudhanshu Barway,Takahiro Nagayama,Tetsuya Zenko,Kentaro Aoki,Takuya Fujiyoshi,Hisanori Furusawa,Koji S. Kawabata,S. Koshida,Chien-Hsiu Lee,Tomoki Morokuma,Kentaro Motohara,Fumiaki Nakata,Ryou Ohsawa,Kouji Ohta,Hirofumi Okita,Akito Tajitsu,Ichi Tanaka,Tsuyoshi Terai,Naoki Yasuda,Fumio Abe,Yuichiro Asakura,Ian A. Bond,Shota Miyazaki,Takahiro Sumi,Paul J. Tristram,Satoshi Honda,Ryosuke Itoh,Yoichi Itoh,Miho Kawabata,Kumiko Morihana,Hiroki Nagashima,Tatsuya Nakaoka,Tomohito Ohshima,Jun Takahashi,Masaki Takayama,Wako Aoki,Stefan Baar,Mamoru Doi,F. Finet,Nobuyuki Kanda,Nobuyuki Kawai,Ji Hoon Kim,Daisuke Kuroda,Wei Liu,Wei Liu,Kazuya Matsubayashi,K. L. Murata,Hiroshi Nagai,T. Saito,Yoshihiko Saito,Shigeyuki Sako,Yuichiro Sekiguchi,Yoichi Tamura,Masayuki Tanaka,Makoto Uemura,Masaki Yamaguchi +60 more
TL;DR: In this paper, the Japanese collaboration for gravitational wave electro-magnetic (J-GEM) follow-up observations of SSS17a, an electromagnetic counterpart of GW170817, showed a 2.5mag decline in the z band during the period between 1.7 and 7.7 d after the merger.
Journal ArticleDOI
The fast, luminous ultraviolet transient AT2018cow: extreme supernova, or disruption of a star by an intermediate-mass black hole?
Daniel A. Perley,Paolo A. Mazzali,Paolo A. Mazzali,Lin Yan,S. Bradley Cenko,S. Bradley Cenko,Suvi Gezari,Kirsty Taggart,N. Blagorodnova,Christoffer Fremling,Brenna Mockler,Brenna Mockler,Avinash Singh,Avinash Singh,Nozomu Tominaga,Nozomu Tominaga,Masaomi Tanaka,Alan M. Watson,T. Ahumada,G. C. Anupama,Chris Ashall,Rosa L. Becerra,D. Bersier,Varun Bhalerao,Joshua S. Bloom,Nathaniel R. Butler,Chris M. Copperwheat,Michael W. Coughlin,Kaushik De,Andrew J. Drake,Dmitry A. Duev,S. Frederick,J. Jesús González,Ariel Goobar,Marianne Heida,Anna Y. Q. Ho,John C. Horst,Tiara Hung,Ryosuke Itoh,Jacob E. Jencson,Mansi M. Kasliwal,Nobuyuki Kawai,Tanazza Khanam,Shrinivas R. Kulkarni,Brajesh Kumar,Harsh Kumar,A. Kutyrev,A. Kutyrev,William H. Lee,Keiichi Maeda,Ashish Mahabal,K. L. Murata,James D. Neill,Chow-Choong Ngeow,Bryan E. Penprase,Elena Pian,Robert M. Quimby,Robert M. Quimby,Enrico Ramirez-Ruiz,Michael G. Richer,Carlos Román-Zúñiga,D. K. Sahu,S. Srivastav,Quentin J Socia,Jesper Sollerman,Yutaro Tachibana,Francesco Taddia,Samaporn Tinyanont,Eleonora Troja,Eleonora Troja,C. Ward,Jerrick Wee,Po-Chieh Yu +72 more
TL;DR: In this article, the spectrum remains extremely hot throughout its evolution, and the photospheric radius contracts with time (receding below R <10^14 cm after 1 month).
Journal ArticleDOI
Time-resolved spectroscopy and photometry of M dwarf flare star YZ Canis Minoris with OISTER and TESS: Blue asymmetry in the Hα line during the non-white light flare
Hiroyuki Maehara,Yuta Notsu,K. Namekata,Satoshi Honda,Adam F. Kowalski,Noriyuki Katoh,Noriyuki Katoh,Tomohito Ohshima,Kota Iida,Motoki Oeda,K. L. Murata,Masayuki Yamanaka,Masayuki Yamanaka,Kengo Takagi,Mahito Sasada,Hiroshi Akitaya,Kai Ikuta,Soshi Okamoto,Daisaku Nogami,Kazunari Shibata +19 more
TL;DR: In this paper, the authors presented the results from spectroscopic and photometric observations of the M-type flare star YZ CMi in the framework of the Optical and Infrared Synergetic Telescopes for Education and Research (OISTER) collaborations during the Transiting Exoplanet Survey Satellite (TESS) observation period.
Journal ArticleDOI
Optical and X-ray observations of stellar flares on an active M dwarf AD Leonis with the Seimei Telescope, SCAT, NICER, and OISTER
Kosuke Namekata,Hiroyuki Maehara,R. Sasaki,Hiroki Kawai,Yuta Notsu,Adam F. Kowalski,Joel C. Allred,Wataru Iwakiri,Yohko Tsuboi,K. L. Murata,Masafumi Niwano,Kazuki Shiraishi,Ryo Adachi,Kota Iida,Motoki Oeda,Satoshi Honda,Miyako Tozuka,Noriyuki Katoh,Noriyuki Katoh,Hiroki Onozato,Soshi Okamoto,Keisuke Isogai,Mariko Kimura,Naoto Kojiguchi,Yasuyuki Wakamatsu,Yusuke Tampo,Daisaku Nogami,Kazunari Shibata +27 more
TL;DR: In this article, the authors reported multi-wavelength monitoring observations of an M-dwarf flare star AD Leonis with Seimei Telescope (6150--7930 A), SCAT (Spectroscopic Chuo-university Astronomical Telescope; 3700--7500 A), NICER (Neutron Star Interior Composition Explorer; 0.2-12.0 keV), and collaborations of OISTER (Optical and Infrared Synergetic Telescopes for Education and Research) program.
Journal ArticleDOI
Characterization of the Nucleus, Morphology, and Activity of Interstellar Comet 2I/Borisov by Optical and Near-infrared GROWTH, Apache Point, IRTF, ZTF, and Keck Observations
Bryce Bolin,Carey M. Lisse,Mansi M. Kasliwal,Robert M. Quimby,Hanjie Tan,Chris M. Copperwheat,Zhong-Yi Lin,Alessandro Morbidelli,Lyu Abe,P. Bendjoya,Kevin B. Burdge,Michael W. Coughlin,Christoffer Fremling,R. Itoh,Michael Koss,Frank J. Masci,Syota Maeno,Eric E. Mamajek,Federico Marocco,K. L. Murata,Jean Pierre Rivet,Michael L. Sitko,Daniel Stern,D. Vernet,Richard Walters,Lin Yan,Igor Andreoni,Varun Bhalerao,Dennis Bodewits,Kaushik De,Kunal Deshmukh,Eric C. Bellm,Nadejda Blagorodnova,Derek Buzasi,S. Bradley Cenko,Chan-Kao Chang,Drew Chojnowski,Richard Dekany,Dmitry A. Duev,Matthew J. Graham,Mario Juric,Shrinivas R. Kulkarni,Thomas Kupfer,Ashish Mahabal,James D. Neill,Chow-Choong Ngeow,Bryan E. Penprase,Reed Riddle,Hector Rodriguez,Roger Smith,Philippe Rosnet,Jesper Sollerman,Maayane T. Soumagnac +52 more
TL;DR: In this paper, visible and near-infrared (NIR) photometric and spectroscopic observations of ISO 2I/Borisov taken from 2019 September 10 to 2019 December 20 using the GROWTH, the Apache Point Observatory Astrophysical Research Consortium 3.5 m, and the NASA Infrared Telescope Facility 3.0 m combined with pre- and postdiscovery observations of 2I from 2019 March 17 to 2019 May 5.