315 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Japan Aerospace Exploration AgencyJP24 papers
- Kyoto UniversityJP24 papers
- Nagoya UniversityJP24 papers
- The University of TokyoJP24 papers
- Institute of Space and Astronautical ScienceJP23 papers
- Shinshu UniversityJP21 papers
- Hirosaki UniversityJP18 papers
- Ibaraki National College of TechnologyJP18 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT18 papers
- Kanagawa UniversityJP18 papers
- Louisiana State UniversityUS18 papers
- National Research CouncilLK18 papers
7 papers · 1 filter
The earliest drawings of datable auroras and a two-tail comet from the Syriac Chronicle of Zūqnīn
Hisashi Hayakawa, Yasuyuki Mitsuma, Yasunori Fujiwara +7
People have probably been watching the sky since the beginning of human history. Observers in pre-telescopic ages recorded anomalous events and these astronomical records in the hi…
East Asian Observations of Low Latitude Aurora during the Carrington Magnetic Storm
Hisashi Hayakawa, Kiyomi Iwahashi, Harufumi Tamazawa +6
The magnetic storm around 1859 September 2, caused by so-called Carrington flare, was the most intense in the history of modern scientific observations, and hence is considered to…
Eastward-expanding auroral surges observed in the post-midnight sector during a multiple-onset substorm
Yoshimasa Tanaka, Yasunobu Ogawa, Akira Kadokura +9
We present three eastward-expanding auroral surge (EEAS) events that were observed intermittently at intervals of about 15 min in the post-midnight sector (01:55-02:40 MLT) by all-…
CALET Upper Limits on X-ray and Gamma-ray Counterparts of GW 151226
O. Adriani, Y. Akaike, K. Asano +89
We present upper limits in the hard X-ray and gamma-ray bands at the time of the LIGO gravitational-wave event GW 151226 derived from the CALorimetric Electron Telescope (CALET) ob…
Ionization of protoplanetary disks by galactic cosmic rays, solar protons, and by supernova remnants
Ryuho Kataoka, Tatsuhiko Sato
Galactic cosmic rays and solar protons ionize the present terrestrial atmosphere, and the air showers are simulated by well-tested Monte-Carlo simulations, such as PHITS code. We u…
"Unusual Rainbow and White Rainbow" A new auroral candidate in oriental historical sources
Hisashi Hayakawa, Hiroaki Isobe, Akito Davis Kawamura +3
Solar activity has been recorded as auroras or sunspots in various historical sources. These records are of much importance for investigating both long-term solar activities and ex…
Analysis of animal accelerometer data using hidden Markov models
Vianey Leos-Barajas, Theoni Photopoulou, Roland Langrock +4
Use of accelerometers is now widespread within animal biotelemetry as they provide a means of measuring an animal's activity in a meaningful and quantitative way where direct obser…