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Full-Text Articles in Physical Sciences and Mathematics
Chandra Spatially Resolved Spectroscopic Study And Multiwavelength Imaging Of The Supernova Remnant 3c 397 (G41.1-0.3), S Safi-Harb, G Dubner, Robert Petre, Stephen Holt, P Durouchoux
Chandra Spatially Resolved Spectroscopic Study And Multiwavelength Imaging Of The Supernova Remnant 3c 397 (G41.1-0.3), S Safi-Harb, G Dubner, Robert Petre, Stephen Holt, P Durouchoux
Stephen Holt
We present a Chandra observation of the supernova remnant (SNR) 3C 397 (G41.1-0.3) obtained with the Advanced CCD Imaging Spectrometer (ACIS-S). Previous studies of this SNR have shown that the remnant harbors a central X-ray "hot spot'' suggestive of a compact object associated with 3C 397. With the Chandra data, we can rule out the nature of the hot spot as a pulsar or a pulsar wind nebula and put an upper limit on the flux of a hidden compact object of F-X(0.5-10 keV) similar to6 x 10(13) ergs cm(-2) s(-1). We found two point sources in the observed Chandra …
The X-Ray Observatory Suzaku, Kazuhisa Mitsuda, Mark Bautz, Hajime Inoue, Richard Kelley, Katsuji Koyama, Hideyo Kunieda, Kazuo Makishima, Yoshiaki Ogawara, Robert Petre, Tadayuki Takahashi, Hiroshi Tsunemi, Nicholas White, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Hisamitsu Awaki, Aya Bamba, Kevin Boyce, Gregory Brown, Kai-Wing Chan, Jean Cottam, Tadayasu Dotani, John Doty, Ken Ebisawa, Yuichiro Ezoe, Andrew Fabian, Enectali Figueroa, Ryuichi Fujimoto, Yasushi Fukazawa, Tae Furusho, Akihiro Furuzawa, Keith Gendreau, Richard Griffiths, Yoshito Haba, Kenji Hamaguchi, Ilana Harrus, Gunther Hasinger, Isamu Hatsukade, Kiyoshi Hayashida, Patrick Henry, Junko Hiraga, Stephen Holt, Ann Hornschemeier, John Hughes, Una Hwang, Manabu Ishida, Yoshitaka Ishisaki, Naoki Isobe, Masayuki Itoh, Naoko Iyomoto, Steven Kahn, Tuneyoshi Kamae, Hideaki Katagiri, Jun Kataoka, Haruyoshi Katayama, Nobuyuki Kawai, Caroline Kilbourne, Kenzo Kinugasa, Steve Kissel, Shunji Kitamoto, Mitsuhiro Kohama, Takayoshi Kohmura, Motohide Kokubun, Taro Kotani, Jun'ichi Kotoku, Aya Kubota, Greg Madejski, Yoshitomo Maeda, Fumiyoshi Makino, Alex Markowitz, Chiho Matsumoto, Hironori Matsumoto, Masaru Matsuoka, Kyoko Matsushita, Dan Mccammon, Tatehiko Mihara, Kazutami Misaki, Emi Miyata, Tsunefumi Mizuno, Koji Mori, Hideyuki Mori, Mikio Morii, Harvey Moseley, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Fumiaki Nagase, Masaaki Namiki, Hitoshi Negoro, Kazuhiro Nakazawa, John Nousek, Takashi Okajima, Yasushi Ogasaka, Takaya Ohashi, Tai Oshima, Naomi Ota, Masanobu Ozaki, Hideki Ozawa, Arvind Parmar, William Pence, Scott Porter, James Reeves, George Ricker, Ikuya Sakurai, Wilton Sanders, Atsushi Senda, Peter Serlemitsos, Ryo Shibata, Yang Soong, Randall Smith, Motoko Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Toru Tamagawa, Keisuke Tamura, Takayuki Tamura, Yasuo Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Hiroshi Tomida, Ken'ichi Torii, Yohko Tsuboi, Masahiro Tsujimoto, Takeshi Tsuru, Martin Turner, Yoshihiro Ueda, Shiro Ueno, Masaru Ueno, Shin'ichiro Uno, Yuji Urata, Shin Watanabe, Norimasa Yamamoto, Kazutaka Yamaoka, Noriko Yamasaki, Koujun Yamashita, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Daisuke Yonetoku, Atsumasa Yoshida
The X-Ray Observatory Suzaku, Kazuhisa Mitsuda, Mark Bautz, Hajime Inoue, Richard Kelley, Katsuji Koyama, Hideyo Kunieda, Kazuo Makishima, Yoshiaki Ogawara, Robert Petre, Tadayuki Takahashi, Hiroshi Tsunemi, Nicholas White, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Hisamitsu Awaki, Aya Bamba, Kevin Boyce, Gregory Brown, Kai-Wing Chan, Jean Cottam, Tadayasu Dotani, John Doty, Ken Ebisawa, Yuichiro Ezoe, Andrew Fabian, Enectali Figueroa, Ryuichi Fujimoto, Yasushi Fukazawa, Tae Furusho, Akihiro Furuzawa, Keith Gendreau, Richard Griffiths, Yoshito Haba, Kenji Hamaguchi, Ilana Harrus, Gunther Hasinger, Isamu Hatsukade, Kiyoshi Hayashida, Patrick Henry, Junko Hiraga, Stephen Holt, Ann Hornschemeier, John Hughes, Una Hwang, Manabu Ishida, Yoshitaka Ishisaki, Naoki Isobe, Masayuki Itoh, Naoko Iyomoto, Steven Kahn, Tuneyoshi Kamae, Hideaki Katagiri, Jun Kataoka, Haruyoshi Katayama, Nobuyuki Kawai, Caroline Kilbourne, Kenzo Kinugasa, Steve Kissel, Shunji Kitamoto, Mitsuhiro Kohama, Takayoshi Kohmura, Motohide Kokubun, Taro Kotani, Jun'ichi Kotoku, Aya Kubota, Greg Madejski, Yoshitomo Maeda, Fumiyoshi Makino, Alex Markowitz, Chiho Matsumoto, Hironori Matsumoto, Masaru Matsuoka, Kyoko Matsushita, Dan Mccammon, Tatehiko Mihara, Kazutami Misaki, Emi Miyata, Tsunefumi Mizuno, Koji Mori, Hideyuki Mori, Mikio Morii, Harvey Moseley, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Fumiaki Nagase, Masaaki Namiki, Hitoshi Negoro, Kazuhiro Nakazawa, John Nousek, Takashi Okajima, Yasushi Ogasaka, Takaya Ohashi, Tai Oshima, Naomi Ota, Masanobu Ozaki, Hideki Ozawa, Arvind Parmar, William Pence, Scott Porter, James Reeves, George Ricker, Ikuya Sakurai, Wilton Sanders, Atsushi Senda, Peter Serlemitsos, Ryo Shibata, Yang Soong, Randall Smith, Motoko Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Toru Tamagawa, Keisuke Tamura, Takayuki Tamura, Yasuo Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Hiroshi Tomida, Ken'ichi Torii, Yohko Tsuboi, Masahiro Tsujimoto, Takeshi Tsuru, Martin Turner, Yoshihiro Ueda, Shiro Ueno, Masaru Ueno, Shin'ichiro Uno, Yuji Urata, Shin Watanabe, Norimasa Yamamoto, Kazutaka Yamaoka, Noriko Yamasaki, Koujun Yamashita, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Daisuke Yonetoku, Atsumasa Yoshida
Stephen Holt
High-sensitivity wide-band X-ray spectroscopy is the key feature of the Suzaku X-ray observatory, launched on 2005 July 10. This paper summarizes the spacecraft, in-orbit performance, operations, and data processing that are related to observations. The scientific instruments, the high-throughput X-ray telescopes, X-ray CCD cameras, non-imaging hard X-ray detector are also described.
Oxygen Line Mapping Of Sn 1006 With Suzaku, Aya Bamba, Hiroya Yamaguchi, Katsuji Koyama, Junko Hiraga, Stephen Holt, John Hughes, Hideaki Katagiri, Jun Kataoka, Satoru Katsuda, Shunji Kitamoto, Motohide Kokubun, Hironori Matsumoto, Emi Miyata, Koji Mori, Hiroshi Nakajima, Masanobu Ozaki, Robert Petre, Akiko Sekiguchi, Tadayuki Takahashi, Takaaki Tanaka, Yukikatsu Terada, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Yasunobu Uchiyama, Masaru Ueno, Shin Watanabe
Oxygen Line Mapping Of Sn 1006 With Suzaku, Aya Bamba, Hiroya Yamaguchi, Katsuji Koyama, Junko Hiraga, Stephen Holt, John Hughes, Hideaki Katagiri, Jun Kataoka, Satoru Katsuda, Shunji Kitamoto, Motohide Kokubun, Hironori Matsumoto, Emi Miyata, Koji Mori, Hiroshi Nakajima, Masanobu Ozaki, Robert Petre, Akiko Sekiguchi, Tadayuki Takahashi, Takaaki Tanaka, Yukikatsu Terada, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Yasunobu Uchiyama, Masaru Ueno, Shin Watanabe
Stephen Holt
SN1006 is one of the supernova remnants (SNRs) with relatively low-temperature electrons, considering the young age of just 1000 years. We carried out SN1006 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 …
Iron And Nickel Line Diagnostics For The Galactic Center Diffuse Emission, Katsuji Koyama, Yoshiaki Hyodo, Tatsuya Inui, Hiroshi Nakajima, Hironori Matsumoto, Takeshi Tsuru, Tadayuki Takahashi, Yoshitomo Maeda, Noriko Yamazaki, Hiroshi Murakami, Shigeo Yamauchi, Yohko Tsuboi, Atsushi Senda, Jun Kataoka, Hiromitsu Takahashi, Stephen Holt, Gregory Brown
Iron And Nickel Line Diagnostics For The Galactic Center Diffuse Emission, Katsuji Koyama, Yoshiaki Hyodo, Tatsuya Inui, Hiroshi Nakajima, Hironori Matsumoto, Takeshi Tsuru, Tadayuki Takahashi, Yoshitomo Maeda, Noriko Yamazaki, Hiroshi Murakami, Shigeo Yamauchi, Yohko Tsuboi, Atsushi Senda, Jun Kataoka, Hiromitsu Takahashi, Stephen Holt, Gregory Brown
Stephen Holt
We have observed the diffuse X-ray emission from the Galactic Center (GC) using the X-ray Imaging Spectrometer (XIS) on Suzaku. The high-energy resolution and the low-background orbit provided excellent spectra of the GC diffuse X-rays (GCDX). The XIS found many emission lines in the GCDX near the energy of K-shell transitions of iron and nickel. The most pronounced features are Fe I K alpha at 6.4 keV and K-shell absorption edge at 7.1 keV, which are from neutral and/or low ionization states of iron, and the K-shell lines at 6.7 keV and 6.9 keV from He-like (Fe XXV K alpha) …
A Chandra Observation Of The Diffuse Emission In The Face-On Spiral Ngc 6946, Eric Schlegel, Stephen Holt, Robert Petre
A Chandra Observation Of The Diffuse Emission In The Face-On Spiral Ngc 6946, Eric Schlegel, Stephen Holt, Robert Petre
Stephen Holt
This paper describes the Chandra observation of the diffuse emission in the face-on spiral NGC 6946. Overlaid on optical and Halpha images, the diffuse emission follows the spiral structure of the galaxy. An overlay on a 6 cm polarized radio intensity map confirms the phase offset of the polarized emission. We then extract and fit the spectrum of the unresolved emission with several spectral models. All model fits show a consistent continuum thermal temperature with a mean value of 0.25 +/- 0..03 keV. Additional degrees of freedom are required to obtain a good fit, and any of several models satisfy …
The Suzaku High Resolution X-Ray Spectrometer, Richard Kelley, Kazuhisa Mitsuda, Christine Allen, Petar Arsenovic, Michael Audley, Thomas Bialas, Kevin Boyce, Robert Boyle, Susan Breon, Gregory Brown, Jean Cottam, Michael Dipirro, Ryuichi Fujimoto, Tae Furusho, Keith Gendreau, Gene Gochar, Oscar Gonzalez, Masayuki Hirabayashi, Stephen Holt, Hajime Inoue, Manabu Ishida, Yoshitaka Ishisaki, Carol Jones, Ritva Keski-Kuha, Caroline Kilbourne, Dan Mccammon, Umeyo Morita, Harvey Moseley, Brent Mott, Katsuhiro Narasaki, Yoshiaki Ogawara, Takaya Ohashi, Naomi Ota, John Panek, Scott Porter, Aristides Serlemitsos, Peter Shirron, Gary Sneiderman, Andrew Szymkowiak, Yoh Takei, June Tveekrem, Stephen Volz, Mikio Yamamoto, Noriko Yamasaki
The Suzaku High Resolution X-Ray Spectrometer, Richard Kelley, Kazuhisa Mitsuda, Christine Allen, Petar Arsenovic, Michael Audley, Thomas Bialas, Kevin Boyce, Robert Boyle, Susan Breon, Gregory Brown, Jean Cottam, Michael Dipirro, Ryuichi Fujimoto, Tae Furusho, Keith Gendreau, Gene Gochar, Oscar Gonzalez, Masayuki Hirabayashi, Stephen Holt, Hajime Inoue, Manabu Ishida, Yoshitaka Ishisaki, Carol Jones, Ritva Keski-Kuha, Caroline Kilbourne, Dan Mccammon, Umeyo Morita, Harvey Moseley, Brent Mott, Katsuhiro Narasaki, Yoshiaki Ogawara, Takaya Ohashi, Naomi Ota, John Panek, Scott Porter, Aristides Serlemitsos, Peter Shirron, Gary Sneiderman, Andrew Szymkowiak, Yoh Takei, June Tveekrem, Stephen Volz, Mikio Yamamoto, Noriko Yamasaki
Stephen Holt
The X-Ray Spectrometer (XRS) has been designed to provide the Suzaku Observatory with non-dispersive, high-resolution X-ray spectroscopy. As designed, the instrument covers the energy range 0.3 to 12 keV, which encompasses the most diagnostically rich part of the X-ray band. The sensor consists of a 32-channel array of X-ray microcalorimeters, each with an energy resolution of about 6 eV. The very low temperature required for operation of the array (60 mK) is provided by a four-stage cooling system containing a single-stage adiabatic demagnetization refrigerator, a superfluid-helium cryostat, a solid-neon dewar, and a single-stage, Stirling-cycle cooler. The Suzaku/XRS is the first …
Suzaku Observations Of Tycho's Supernova Remnant, Toru Tamagawa, Asami Hayato, Satoshi Nakamura, Yukikatsu Terada, Aya Bamba, Junko Hiraga, John Hughes, Una Hwang, Jun Kataoka, Kenzo Kinugasa, Hideyo Kunieda, Takaaki Tanaka, Hiroshi Tsunemi, Masaru Ueno, Stephen Holt, Motohide Kokubun, Emi Miyata, Andrew Szymkowiak, Tadayuki Takahashi, Keisuke Tamura, Daisuke Ueno, Kazuo Makishima
Suzaku Observations Of Tycho's Supernova Remnant, Toru Tamagawa, Asami Hayato, Satoshi Nakamura, Yukikatsu Terada, Aya Bamba, Junko Hiraga, John Hughes, Una Hwang, Jun Kataoka, Kenzo Kinugasa, Hideyo Kunieda, Takaaki Tanaka, Hiroshi Tsunemi, Masaru Ueno, Stephen Holt, Motohide Kokubun, Emi Miyata, Andrew Szymkowiak, Tadayuki Takahashi, Keisuke Tamura, Daisuke Ueno, Kazuo Makishima
Stephen Holt
Tycho's supernova remnant was observed by the XIS and HXD instruments onboard the Suzaku satellite on 2006 June 26-29 for 92 ks. The spectrum up to 30 keV was well fitted with a two-component model, consisting of a power-law with a photon index of 2.7 and a thermal bremsstrahlung model with a temperature of 4.7 keV. The former component can alternatively be modeled as synchrotron emission from a population of relativistic electrons with an estimated roll-off energy of around 1 keV. In the XIS spectra, in addition to the prominent Fe K alpha line (6.445 keV), we observed for the …
Suzaku Observations Of Diffuse X-Ray Emission From The Carina Nebula, Kenji Hamaguchi, Robert Petre, Hironori Matsumoto, Masahiro Tsujimoto, Stephen Holt, Yuichiro Ezoe, Hideki Ozawa, Yohko Tsuboi, Yang Soong, Shunji Kitamoto, Akiko Sekiguchi, Motohide Kokubun
Suzaku Observations Of Diffuse X-Ray Emission From The Carina Nebula, Kenji Hamaguchi, Robert Petre, Hironori Matsumoto, Masahiro Tsujimoto, Stephen Holt, Yuichiro Ezoe, Hideki Ozawa, Yohko Tsuboi, Yang Soong, Shunji Kitamoto, Akiko Sekiguchi, Motohide Kokubun
Stephen Holt
We studied extended X-ray emission from the Carina Nebula taken with the Suzaku CCD camera XIS on 2005 August 29. The X-ray morphology, plasma temperature, and absorption to the plasma are consistent with the earlier Einstein results. The Suzaku spectra newly revealed emission lines from various species, including oxygen, but not from nitrogen. This result restricts the N/O ratio to be significantly low, compared with evolved massive stellar winds, suggesting that the diffuse emission originated in an old supernova remnant or a super shell produced by multiple supernova remnants. The X-ray spectra from the north and south of eta Car …
X-Ray Studies Of The Pulsar Wind Nebula Around Psr B0540-69, Robert Petre, U. Hwang, Stephen Holt, R. Williams
X-Ray Studies Of The Pulsar Wind Nebula Around Psr B0540-69, Robert Petre, U. Hwang, Stephen Holt, R. Williams
Stephen Holt
The pulsar wind nebula (PWN) surrounding the 50-ms pulsar B0540-69 in the Large Magellanic Cloud shares many properties with the Crab Nebula, the canonical Galactic PWN. We have used the ACIS instrument on the Chandra X-ray Observatory to perform spatially resolved spectroscopy of the PWN. The spectrum of the inner 10" is characterized by a simple power law, with a spectral index that steepens strongly with radius. Outside the central 10" the spectra also require a thermal component. This diameter corresponds to a shell detected in [0 111], suggesting that this shell represents a skin around the PWN, in analogy …
The X-Ray Structure And Spectrum Of The Pulsar Wind Nebula Surrounding Psr B0540-69.3, Robert Petre, U Hwang, Stephen Holt, S Safi-Harb, R. Williams
The X-Ray Structure And Spectrum Of The Pulsar Wind Nebula Surrounding Psr B0540-69.3, Robert Petre, U Hwang, Stephen Holt, S Safi-Harb, R. Williams
Stephen Holt
We present the first spatially resolved spectral study of an extragalactic pulsar wind nebula (PWN), that surrounding the 50 ms pulsar B0540-69.3 in the Large Magellanic Cloud, using the ACIS instrument on board the Chandra X-ray Observatory. The spectral properties of the PWN change at a radius of ~5'', corresponding to a shell detected optically in [O III]. Within this radius, the spectra are well characterized by a simple power law, whose spectral index varies strongly with radius, so that the effective size of the nebula decreases with increasing photon energy. These X-ray measurements support the idea that the [OIII] …