Search Publications
X-Ray Temperature and Mass Measurements to the Virial Radius of Abell 1413 with Suzaku
Hoshino, Akio; Sato, Kosuke; Fukazawa, Yasushi +14 more
We present X-ray observations of the northern outskirts of the relaxed galaxy cluster A 1413 with Suzaku, whose XIS instrument has the low intrinsic background needed to make measurements of these low surface brightness regions. We excised 15 point sources superimposed on the image above a flux of 1 × 10-14erg cm-2s-1
Suzaku Discovery of a Hard X-Ray Tail in the Persistent Spectra from the Magnetar 1E 1547.0-5408 during its 2009 Activity
Enoto, Teruaki; Yamaoka, Kazutaka; Makishima, Kazuo +8 more
The fastest-rotating magnetar 1E 1547.0-5408 was observed in broad-band X-rays with Suzaku for 33 ks on 2009 January 28-29, 7 d after the onset of its latest bursting activity. After removing burst events, the absorption-uncorrected 2-10 keV flux of the persistent emission was measured with the XIS as 5.7 × 10-1erg cm-2s…
Internal Fine Structure of Ellerman Bombs
Matsumoto, Takuma; Shibata, Kazunari; Ichimoto, Kiyoshi +12 more
We conducted coordinated observations of Ellerman bombs (EBs) between Hinode Satellite and Hida Observatory (HOP12). CaII H broad-band filter images of NOAA 10966 on 2007 August 9 and 10 were obtained with the Solar Optical Telescope (SOT) aboard the Hinode Satellite, and many bright points were observed. We identified a total of 4 bright points a…
Observations of Chromospheric Anemone Jets with Hinode Ca II Broadband Filtergraph and Hida Ca II Spectroheliograph
Shibata, Kazunari; Ichimoto, Kiyoshi; Kitai, Reizaburo +3 more
We present the first simultaneous observations of chromospheric "anemone" jets in solar active regions with Hinode SOT Ca II H broadband filetergram and Ca II K spetroheliogram on the Domeless Solar Telescope (DST) at Hida Observatory. During the coordinated observation, 9 chromospheric anemone jets were simultaneously observed with the two instru…
X-Ray Spectroscopy of Galactic Hot Gas along the PKS 2155-304 Sight Line
Mitsuda, Kazuhisa; Yamasaki, Noriko Y.; Wang, Q. Daniel +5 more
We present a detailed spectroscopic study of the hot gas in the Galactic halo toward the direction of a blazer PKS 2155-304 (z = 0.117). The OVII and OVIII absorption lines were measured with the Low and High Energy Transmission Grating Spectrographs aboard Chandra, and the OVII, OVIII, and NeIX emission lines produced in an adjacent field of the …
Discovery of K-Shell Emission Lines of Neutral Atoms in the Galactic Center Region
Koyama, Katsuji; Nobukawa, Masayoshi; Tsuru, Takeshi Go +2 more
The K-shell emission line of neutral iron from the Galactic center (GC) region is one of the keys concerning the structure and activity of the GC. The origin is still an open question, but possibly due either to X-ray radiation or to electron bombarding to neutral atoms. To address this issue, we analyzed the Suzaku X-ray spectrum from the GC regi…
Time Variability of the Geocoronal Solar-Wind Charge Exchange in the Direction of the Celestial Equator
Miyoshi, Yoshizumi; Ezoe, Yuichiro; Mitsuda, Kazuhisa +5 more
We report on the detection of a time variable OVII line emission in a deep 100 ks Suzaku X-ray Imaging Spectrometer spectrum of the galactic ridge X-ray emission. The observed line intensity is too strong (11 ± 2 line unit or photon cm-2 s-1 sr-1) to be emitted inside the heavily obscured galactic disk. It showed a…
Identification of CXOU J171405.7-381031 as a New Magnetar with XMM-Newton
Ishida, Manabu; Bamba, Aya; Nakamura, Ryoko +1 more
We observed the 3.8 s pulsar CXOU J171405.7
Spicule Dynamics over a Plage Region
Matsumoto, Takuma; Shibata, Kazunari; Ichimoto, Kiyoshi +14 more
We studied spicular jets over a plage area and derived their dynamic characteristics using Hinode Solar Optical Telescope (SOT) high-resolution images. A target plage region was near to the west limb of the solar disk. This location permitted us to study the dynamics of spicular jets without any overlapping effect of spicular structures along the …
AKARI Near- to Mid-Infrared Imaging and Spectroscopic Observations of the Small Magellanic Cloud. I Bright Point Source List
Onaka, Takashi; Yamamura, Issei; Matsunaga, Noriyuki +9 more
We carried out near- to mid-infrared imaging and spectroscopic observations of patchy areas in the Small Magellanic Cloud using the Infrared Camera aboard AKARI. Two 100 arcmin² areas were imaged in 3.2, 4.1, 7, 11, 15, and 24µm, and also spectroscopically observed in the wavelength range continuously from 2.5 to 13.4µm. The spectral r…