Rob Petre

Publications (2)1.18 Total impact

• Source

  Available from: Yasunobu Uchiyama

  Article: Suzaku wide-band observations of SN 1006

  Aya Bamba, Yasushi Fukazawa, Junko S. Hiraga, John P. Hughes, Hideaki Katagiri, Motohide Kokubun, Katsuji Koyama, Emi Miyata, Tsunefumi Mizuno, Koji Mori, Hiroshi Nakajima, Masanobu Ozaki, Rob Petre, Hiromitsu Takahashi, Tadayuki Takahashi, Takaaki Tanaka, Yukikatsu Terada, Yasunobu Uchiyama, Shin Watanabe, Hiroya Yamaguchi
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  ABSTRACT: We report on the wide band spectra of SN 1006 as observed by Suzaku. Thermal and nonthermal emission are successfully resolved thanks to the excellent spectral response of Suzaku's X-ray CCD XIS. The nonthermal emission cannot be reproduced by a simple power-law model but needs a roll-off at 5.7$\times 10^{16}$ Hz = 0.23 keV. The roll-off frequency is significantly higher in the northeastern rim than in the southwestern rim. We also have placed the most stringent upper limit of the flux above 10 keV using the Hard X-ray Detector.
  09/2007;
• Article: Oxygen line mapping of SN 1006 with Suzaku

  Aya Bamba, Hiroya Yamaguchi, Katsuji Koyama, Junko S. Hiraga, Steve Holt, John P. Hughes, Hideaki Katagiri, Jun Kataoka, Satoru Katsuda, Shunji Kitamoto, [......], Tadayuki Takahashi, Takaaki Tanaka, Yukikatsu Terada, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Yasunobu Uchiyama, Masaru Ueno, Shin Watanabe
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  ABSTRACT: SN 1006 is one of the supernova remnants (SNRs) with relatively low-temperature electrons, considering the young age of just 1000 years. We carried out SN 1006 mapping observations with the X-ray Imaging Spectrometers (XIS) and the Hard X-ray Detector (HXD) onboard Suzaku, the fifth Japanese X-ray satellite. Thanks to the excellent spectral resolution of XIS in the soft X-ray band, H-like and He-like oxygen emission lines were clearly detected, and we could make a map of the line intensity, and as well as a flux and the photon index of nonthermal component. We found that these parameters have spatial dependences from region to region in the SNR; the north region is bright in nonthermal, while dim in thermal; the east region is bright in both nonthermal and thermal; the inner region shows dim nonthermal and bright thermal emission. The photon index is the smallest in the north region.
  Advances in Space Research 41(3):411-415. · 1.18 Impact Factor