Search Publications
Restoring the Suzaku Source Position Accuracy and Point-Spread Function
Maeda, Yoshitomo; Ishida, Manabu; Iizuka, Ryo +9 more
We present an empirical correction of sky coordinates of X-ray photons obtained with the X-ray Imaging Spectrometer (XIS) aboard the Suzaku satellite to improve the source position accuracy and restore the point-spread function (PSF). The XIS images are known to have an uncertainty in position of up to 1', and to show considerable degradations of …
Performance of the Charge-Injection Capability of Suzaku XIS
Dotani, Tadayasu; Katsuda, Satoru; Yamaguchi, Hiroya +17 more
A charge-injection technique is applied to the X-ray CCD camera, XIS (X-ray Imaging Spectrometer) aboard Suzaku. The charge transfer inefficiency (CTI) in each CCD column (vertical transfer channel) is measured by the injection of charge packets into a transfer channel and subsequent readout. This paper reports on the performances of the charge-in…
Suzaku Discovery of Hard X-Ray Pulsations from a Rotating Magnetized White Dwarf, AEAquarii
Dotani, Tadayasu; Ishida, Manabu; Hayashi, Takayuki +7 more
A fast rotating magnetized white dwarf, AEAquarii, was observed with Suzaku, in 2005 October-November and 2006 October with exposures of 53.1 and 42.4ks, respectively. In addition to clear spin modulation in the 0.5-10keV band of the XIS data at the barycentric period of 33.0769±0.0001s, the 10-30keV HXD data in the second half of the 2005 observa…
X-Ray Spectroscopy of SN 1006 with Suzaku
Katsuda, Satoru; Yamaguchi, Hiroya; Koyama, Katsuji +7 more
We report on observations of SN 1006 with Suzaku. We firmly detected K-shell emission from Fe, for the first time, and found that the Fe ionization state is quite low. The broad-band spectrum extracted from southeast of the remnant was well-fitted with a model consisting of three optically thin thermal non-equilibrium ionization plasmas and a powe…
Absolute Photometric Calibration of the Infrared Camera (IRC) aboard AKARI
Oyabu, Shinki; Ohyama, Youichi; Onaka, Takashi +11 more
The absolute photometric calibration of imaging observations with the Infrared Camera (IRC) aboard the AKARI satellite was performed by monitoring the same stars regularly and by observing aset of standard stars. By our monitoring observations, we confirmed that all channels of the IRC were stable to within 4% and that their sensitivities were con…
AKARI/FIS Mapping of the ISM-Wind Bow Shock around α Orionis
Yamamura, Issei; Matsunaga, Noriyuki; Mito, Hiroyuki +7 more
We present 10' × 50'scan maps around an M supergiant αOri at 65, 90, 140, and 160µm obtained with the AKARI Infrared Astronomy Satellite. Higher spatial resolution data with the exact analytic solution permit us to fit the de-projected shape of the stellar-wind bow shock around αOri to have a stand-off distance of 4'.8, position angle of 55°…
Albedo, Size, and Surface Characteristics of Hayabusa-2 Sample-Return Target 162173 1999 JU3 from AKARI and Subaru Observations
Müller, T. G.; Wada, T.; Ita, Y. +7 more
Suzaku Observation of the Ophiuchus Galaxy Cluster: One of the Hottest Cool Core Clusters
Sarazin, Craig L.; Reiprich, Thomas H.; Hayashida, Kiyoshi +6 more
We present the analysis of a Suzaku observation of the Ophiuchus galaxy cluster. We confirmed that the cluster has a cool core. While the temperature of the intracluster medium (ICM) decreases toward the center, the metal abundance increases. Except for the core (r lesssim 50kpc), the cluster is hot (∼9-10keV) and is almost isothermal for r lesssi…
Suzaku Observations of AWM 7 Cluster of Galaxies: Temperatures, Abundances, and Bulk Motions
Ishida, Manabu; Sato, Kosuke; Ohashi, Takaya +4 more
We carried out 3 observations of the cluster of galaxies AWM 7, for the central region and 20'-east and 20'-west offset regions, with Suzaku. Temperature and abundance profiles were measured out to 27' simeq 570 h70-1kpc, which corresponded to ∼0.35r180. The temperature of the intra-cluster medium (ICM) slightly de…
AKARI IRC Survey of the Large Magellanic Cloud: Outline of the Survey and Initial Results
Hasegawa, Tetsuo; Onaka, Takashi; Tamura, Motohide +13 more
We observed an area of 10deg2 of the Large Magellanic Cloud using the Infrared Camera (IRC) on board AKARI. The observations were carried out using five imaging filters (3, 7, 11, 15, and 24µm) and adispersion prism (2-5µm, λ / Δλ sim 20) equipped in the IRC. This paper describes an outline of our survey project, and present…