Zobrazeno 101 - 110
of 154
pro vyhledávání: '"Michael S. Brotherton"'
Autor:
Jessica Kim Quijano, Jennifer E. Scott, Zhaohui Shang, Omer Blaes, Ivan Hubeny, Gerard A. Kriss, Mary Elizabeth Kaiser, Michael S. Brotherton, Wei Zheng, J. B. Hutchings, William R. Oegerle, Anuradha Koratkar, Richard F. Green
We investigate the ultraviolet-to-optical spectral energy distributions (SEDs) of 17 active galactic nuclei (AGNs) using quasi-simultaneous spectrophotometry spanning 900-9000 Angstrom (rest frame). We employ data from the Far Ultraviolet Spectroscop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a17c2adddacdb88962574b2eec1ba824
http://arxiv.org/abs/astro-ph/0409697
http://arxiv.org/abs/astro-ph/0409697
Autor:
Michael S. Brotherton, Jennifer Scott, J. B. Hutchings, Gerard A. Kriss, J. Michael Shull, Wei Zheng, Richard F. Green
The Far Ultraviolet Spectroscopic Explorer (FUSE) has surveyed a large sample (> 100) of active galactic nuclei in the low-redshift universe (z 0.33 formed from archival Hubble Space Telescope spectra, \alpha=-1.76 \pm 0.12. We identify several promi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b36de798c47aead617b2c903538d04b
https://nrc-publications.canada.ca/eng/view/object/?id=54f9e9c2-83d4-494a-9adc-09c6b85468bb
https://nrc-publications.canada.ca/eng/view/object/?id=54f9e9c2-83d4-494a-9adc-09c6b85468bb
We present followup observations of five hard X-ray sources from the ASCA 5-10 keV SHEEP survey, which has a limiting flux of $\sim 10^{-13}$ erg cm$^{-2}$ s$^{-1}$. Chandra data have been obtained to improve the X-ray positions from a few arcmin to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64ab687560dcbb0f623e8c3a3e8f781a
Autor:
Michael S. Brotherton, Chun Ly, Wil van Breugel, Beverley J. Wills, Robert Antonucci, Sally A. Laurent-Muehleisen
The large, powerful Fanaroff-Riley class II radio source 3CR 68.1 is an optically red quasar with strong evidence for dust reddening, intrinsic ultraviolet line absorption, and X-ray absorption. In the context of its large, extended radio structure a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e585506cdc49cc74a30389e56918d58
Autor:
Wil van Breugel, B. J. Boyle, Alexei V. Filippenko, Gabriela Canalizo, Matthew Grabelsky, Tom Shanks, Scott M. Croom, Michael S. Brotherton
We present new Hubble Space Telescope (HST) WFPC2 images of the post-starburst quasar UN J1025-0040, which contains both an active galactic nucleus (AGN) and a 400-Myr-old nuclear starburst of similar bolometric luminosity (10^{11.6} solar luminositi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5713fbaa5490e963054c05113827117e
Autor:
Qirong Yuan, Gerard A. Kriss, Todd M. Tripp, Michael S. Brotherton, Mary Elizabeth Kaiser, Richard F. Green
As one of the most luminous radio-loud quasars showing intrinsic ultraviolet (UV) and X-ray absorption, 3C 351 provides a laboratory for studying the kinematics and physical conditions of such ionized absorbers. We present an analysis of the intrinsi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4e2587620233e0e0c615ea8ff6f48aa
Autor:
Richard F. Green, Michael A. DiPompeo, Jessie C. Runnoe, Michael S. Brotherton, Adam D. Myers
Publikováno v:
The Astrophysical Journal. 787:73
Quasar luminosity functions are a fundamental probe of the growth and evolution of supermassive black holes. Measuring the intrinsic luminosity function is difficult in practice, due to a multitude of observational and systematic effects. As sample s
Autor:
Michael S. Brotherton, William R. Oegerle, Richard F. Green, J. B. Hutchings, M. E. Kaiser, Gerard A. Kriss, W. Zheng
We present far-ultraviolet spectra of the Seyfert 1.5 galaxy NGC 5548 obtained in 2000 June with the Far Ultraviolet Spectroscopic Explorer (FUSE). Our data span the observed wavelength range 915--1185 Angstroms at a resolution of 20 km/s. The spectr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03d745c5c55e13d15bc139a2b6bafb02
http://arxiv.org/abs/astro-ph/0109496
http://arxiv.org/abs/astro-ph/0109496
Autor:
Michael S. Brotherton, Richard F. Green, D. Michael Crenshaw, Vesa T. Junkkarinen, Bob Becker, Martijn de Kool, Max Pettini, Ari Laor, Smita Mathur, Paul J. Green, Sally A. Laurent-Muehleisen, Anuradha Koratkar, Bev Wills, W. N. Brandt, Norman Murray, Wil van Breugel, Nahum Arav, Wim de Vries, Kirk T. Korista
We describe deep (40 orbits) HST/STIS observations of the BALQSO PG 0946+301 and make them available to the community. These observations are the major part of a multi-wavelength campaign on this object aimed at determining the ionization equilibrium
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::227a60d362e562598688b326d575234d
Autor:
Michael D. Gregg, Robert H. Becker, Sally A. Laurent-Muehleisen, Michael S. Brotherton, Hien D. Tran, Richard L. White
We present a very high signal-to-noise ratio composite spectrum created using 657 radio-selected quasars from the FIRST Bright Quasar Survey. The spectrum spans rest-frame wavelengths 900 - 7500 Angstroms. Additionally we present composite spectra fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::414dfe10fa0db5ecfcbffdb1d302e900
http://arxiv.org/abs/astro-ph/0008396
http://arxiv.org/abs/astro-ph/0008396