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Daniel R. Wik
Researcher at University of Utah
Publications - 138
Citations - 8580
Daniel R. Wik is an academic researcher from University of Utah. The author has contributed to research in topics: Galaxy & Galaxy cluster. The author has an hindex of 39, co-authored 132 publications receiving 7707 citations. Previous affiliations of Daniel R. Wik include Ohio University & Goddard Space Flight Center.
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Journal ArticleDOI
THE DISTRIBUTION OF RADIOACTIVE 44Ti IN CASSIOPEIA A
Brian W. Grefenstette,Chris L. Fryer,Fiona A. Harrison,Steven E. Boggs,Tracey DeLaney,J. Martin Laming,Stephen P. Reynolds,David M. Alexander,Didier Barret,Finn Erland Christensen,William W. Craig,Karl Forster,Paolo Giommi,Charles J. Hailey,Allan Hornstrup,Takao Kitaguchi,Jason E. Koglin,Laura A. Lopez,Peter H. Mao,Kristin K. Madsen,Hiromasa Miyasaka,Kaya Mori,M. Perri,Michael J. Pivovaroff,Simonetta Puccetti,Vikram Rana,Daniel Stern,Niels Jørgen Stenfeldt Westergaard,Daniel R. Wik,William W. Zhang,Andreas Zoglauer +30 more
TL;DR: In this article, a 2.4Ms NuSTAR observing campaign aimed at studying the supernova remnant Cassiopeia A (Cas A) was conducted, where spatially resolved spectroscopic analyses of the ejecta were performed to determine the Doppler shift and thus the three-dimensional velocities of the δ(44)Ti ejecta.
Journal ArticleDOI
{\it NuSTAR} Reveals an Intrinsically X-ray Weak Broad Absorption Line Quasar in the Ultraluminous Infrared Galaxy Markarian 231
Stacy H. Teng,W. N. Brandt,Fiona A. Harrison,B. Luo,David M. Alexander,Franz E. Bauer,S. E. Boggs,F. E. Christensen,Andrea Comastri,William W. Craig,A. C. Fabian,Duncan Farrah,Fabrizio Fiore,Poshak Gandhi,Brian W. Grefenstette,C. J. Hailey,Ryan C. Hickox,K. K. Madsen,Andy Ptak,Jane R. Rigby,Guido Risaliti,Cristian Saez,Daniel Stern,Sylvain Veilleux,Dominic J. Walton,Daniel R. Wik,W. W. Zhang +26 more
TL;DR: In this paper, high-energy (3-30 keV) observations of the nearest quasar, the ultraluminous infrared galaxy (ULIRG) Markarian 231 (Mrk 231), supplemented with new and simultaneous low-energy data from {\it Chandra}.
Journal ArticleDOI
Hard X-Ray-emitting Active Galactic Nuclei Selected by the Chandra Multiwavelength Project
John D. Silverman,John D. Silverman,John D. Silverman,Paul J. Green,Wayne A. Barkhouse,Dong-Woo Kim,Tom Aldcroft,Robert A. Cameron,Belinda Jane Wilkes,A. Mossman,H. Ghosh,Harvey Tananbaum,Malcolm G. Smith,R. C. Smith,Paul S. Smith,C. B. Foltz,Daniel R. Wik,Buell T. Jannuzi +17 more
TL;DR: In this paper, the authors presented X-ray and optical analysis of 188 active galactic nuclei (AGN) identified from 497 hard x-ray sources in 20 Chandra fields (1.5 deg 2 ) forming part of the Chandra Multiwavelength Project.
Journal ArticleDOI
The distribution of radioactive $^{44}$Ti in Cassiopeia A
Brian W. Grefenstette,Chris L. Fryer,Fiona A. Harrison,Steven E. Boggs,Tracey DeLaney,J. Martin Laming,Stephen P. Reynolds,David M. Alexander,Didier Barret,Finn Erland Christensen,William W. Craig,Karl Forster,Paolo Giommi,Charles J. Hailey,Alan Hornstrup,Takao Kitaguchi,J. E. Koglin,Laura A. Lopez,Peter H. Mao,Kristin K. Madsen,Hiromasa Miyasaka,Kaya Mori,M. Perri,Michael J. Pivovaroff,Simonetta Puccetti,Vikram Rana,Daniel Stern,Niels Jørgen Stenfeldt Westergaard,Daniel R. Wik,William W. Zhang,Andreas Zoglauer +30 more
TL;DR: In this article, the authors performed spatially-resolved spectroscopic analyses of the supernova remnant Cassiopeia A (Cas A) to determine the Doppler shift and thus the three-dimensional velocities of the ejecta.
Journal ArticleDOI
Hitomi (ASTRO-H) X-ray Astronomy Satellite
Tadayuki Takahashi,Motohide Kokubun,Kazuhisa Mitsuda,Richard L. Kelley,Takaya Ohashi,Felix Aharonian,Felix Aharonian,Hiroki Akamatsu,Fumie Akimoto,Steven W. Allen,Naohisa Anabuki,Lorella Angelini,Keith Arnaud,Makoto Asai,Marc Audard,Hisamitsu Awaki,Magnus Axelsson,Philipp Azzarello,Chris Baluta,Aya Bamba,Nobutaka Bando,Marshall W. Bautz,Thomas G. Bialas,Roger Blandford,Kevin R. Boyce,Laura Brenneman,Gregory V. Brown,Esra Bulbul,Edward M. Cackett,Edgar Canavan,Maria Chernyakova,Meng P. Chiao,Paolo Coppi,Elisa Costantini,Steve O' Dell,Michael J. DiPirro,Chris Done,Tadayasu Dotani,John P. Doty,Ken Ebisawa,Megan E. Eckart,Teruaki Enoto,Yuichiro Ezoe,Andrew C. Fabian,Carlo Ferrigno,Adam R. Foster,Ryuichi Fujimoto,Yasushi Fukazawa,Stefan Funk,Akihiro Furuzawa,Massimiliano Galeazzi,Luigi C. Gallo,Poshak Gandhi,Kirk Gilmore,Margherita Giustini,Andrea Goldwurm,Liyi Gu,Matteo Guainazzi,D. Haas,Yoshito Haba,Kouichi Hagino,Kenji Hamaguchi,Kenji Hamaguchi,Ilana M. Harrus,Ilana M. Harrus,Isamu Hatsukade,Takayuki Hayashi,Katsuhiro Hayashi,Kiyoshi Hayashida,Jan-Willem den Herder,Junko S. Hiraga,Kazuyuki Hirose,Ann Hornschemeier,Akio Hoshino,John P. Hughes,Yuto Ichinohe,Ryo Iizuka,Hajime Inoue,Yoshiyuki Inoue,Kazunori Ishibashi,Manabu Ishida,Kumi Ishikawa,Kosei Ishimura,Yoshitaka Ishisaki,Masayuki Itoh,Masachika Iwai,Naoko Iwata,Naoko Iyomoto,Chris Jewell,Jelle Kaastra,Timothy R. Kallman,Tsuneyoshi Kamae,Erin Kara,Jun Kataoka,Satoru Katsuda,Satoru Katsuda,Junichiro Katsuta,Madoka Kawaharada,Nobuyuki Kawai,Taro Kawano,Shigeo Kawasaki,Dmitry Khangulyan,Caroline A. Kilbourne,Mark O. Kimball,A. L. King,Takao Kitaguchi,Shunji Kitamoto,Tetsu Kitayama,Takayoshi Kohmura,Saori Konami,Tatsuro Kosaka,Alex Koujelev,Katsuji Koyama,Shu Koyama,Peter Kretschmar,Hans A. Krimm,Hans A. Krimm,Aya Kubota,Hideyo Kunieda,Philippe Laurent,Shiu-Hang Lee,Maurice A. Leutenegger,Olivier Limousin,Michael Loewenstein,Michael Loewenstein,Knox S. Long,D. Lumb,Greg Madejski,Yoshitomo Maeda,Daniel Maier,Kazuo Makishima,Maxim Markevitch,Candace Masters,Hironori Matsumoto,Kyoko Matsushita,Dan McCammon,Daniel S. McGuinness,Brian R. McNamara,Missagh Mehdipour,Joseph Miko,Eric D. Miller,Jon M. Miller,Shin Mineshige,Kenji Minesugi,Ikuyuki Mitsuishi,Takuya Miyazawa,Tsunefumi Mizuno,Hideyuki Mori,Koji Mori,Franco Moroso,Harvey Moseley,Theodore Muench,Koji Mukai,Koji Mukai,Hiroshi Murakami,Toshio Murakami,Richard F. Mushotzky,Housei Nagano,Ryo Nagino,Takao Nakagawa,Hiroshi Nakajima,Takeshi Nakamori,Toshio Nakano,Shinya Nakashima,Kazuhiro Nakazawa,Yoshiharu Namba,Chikara Natsukari,Yusuke Nishioka,Kumiko K. Nobukawa,Masayoshi Nobukawa,Hirofumi Noda,Masaharu Nomachi,Hirokazu Odaka,Hiroyuki Ogawa,Mina Ogawa,Keiji Ogi,Masanori Ohno,Masayuki Ohta,Takashi Okajima,Atsushi Okamoto,Tsuyoshi Okazaki,Naomi Ota,Masanobu Ozaki,Frits Paerels,Stéphane Paltani,Arvind Parmar,Robert Petre,Ciro Pinto,Jelle de Plaa,M. Pohl,James Pontius,Frederick S. Porter,Katja Pottschmidt,Katja Pottschmidt,B. Ramsey,Christopher S. Reynolds,Helen Russell,Samar Safi-Harb,Shinya Saito,Kazuhiro Sakai,Shin-ichiro Sakai,Hiroaki Sameshima,Toru Sasaki,Goro Sato,Kosuke Sato,Kosuke Sato,Rie Sato,Yoichi Sato,Makoto Sawada,Norbert Schartel,Peter J. Serlemitsos,Hiromi Seta,Yasuko Shibano,Maki Shida,Megumi Shidatsu,Takanobu Shimada,Keisuke Shinozaki,Peter Shirron,Aurora Simionescu,Cynthia Simmons,Randall K. Smith,Gary A. Sneiderman,Yang Soong,Łukasz Stawarz,Yasuharu Sugawara,Satoshi Sugita,Hiroyuki Sugita,Andrew Szymkowiak,Hiroyasu Tajima,Hiromitsu Takahashi,Takeda Shin'ichiro,Yoh Takei,Toru Tamagawa,Takayuki Tamura,Keisuke Tamura,Takaaki Tanaka,Yasuo Tanaka,Yasuyuki T. Tanaka,Makoto Tashiro,Yuzuru Tawara,Yukikatsu Terada,Yuichi Terashima,Francesco Tombesi,Francesco Tombesi,Francesco Tombesi,Hiroshi Tomida,Yohko Tsuboi,Masahiro Tsujimoto,Hiroshi Tsunemi,Takeshi Go Tsuru,Hiroyuki Uchida,Hideki Uchiyama,Yasunobu Uchiyama,Shutaro Ueda,Yoshihiro Ueda,Shiro Ueno,Uno Shin'ichiro,C. Megan Urry,Eugenio Ursino,Cor P. de Vries,Atsushi Wada,Shin Watanabe,Tomomi Watanabe,Norbert Werner,Norbert Werner,Norbert Werner,Daniel R. Wik,Daniel R. Wik,Daniel R. Wik,Dan R. Wilkins,Brian J. Williams,Shinya Yamada,Takahiro Yamada,Hiroya Yamaguchi,Hiroya Yamaguchi,Kazutaka Yamaoka,Noriko Y. Yamasaki,Makoto Yamauchi,Shigeo Yamauchi,Tahir Yaqoob,Tahir Yaqoob,Yoichi Yatsu,Daisuke Yonetoku,Atsumasa Yoshida,Takayuki Yuasa,Irina Zhuravleva,Abderahmen Zoghbi +286 more
TL;DR: The Hitomi (ASTRO-H) mission as discussed by the authors is the 6 Japanese x-ray astronomy satellite developed by a large international collaboration, including Japan, USA, Canada, and Europe.