Winter, Lisa, Mushotzky, Richard, Terashima, Yuichi, Ueda, Yoshihiro
The fraction of Compton thick sources is one of the main uncertainties left in understanding the AGN population. The Swift Burst Alert Telescope (BAT) all-sky survey, for the first time gives us an...
Eguchi, Satoshi, Ueda, Yoshihiro, Terashima, Yuichi, Mushotzky, Richard, Tueller, Jack
We present a systematic spectral analysis with Suzaku of six AGNs detected in the Swift/BAT hard X-ray (15--200 keV) survey, Swift J0138.6-4001, J0255.2-0011, J0350.1-5019, J0505.7-2348,...
ASCA OBSERVATIONS OF THE SPECTRUMOF THE X-RAY BACKGROUND (2007)
Keith C. Gendreau, Richard Mushotzky, Andrew C. Fabian, Tsuneo Kii, Stephen S. Holt, Peter J. Serlemitsos, ...
We present initial results from ASCA on the spectrum of the Cosmic X-ray Background from 0.4 to 10 keV. About 250 ksec of deep survey data has been collected from the performance verification phase...
The Symbiotic System SS73 17 Seen with Suzaku (2007)
Smith, Randall K., Mushotzky, Richard, Mukai, Koji, Kallman, Tim, Markwardt, Craig B., Tueller, Jack
We observed with Suzaku the symbiotic star SS73 17, motivated by the discovery by the INTEGRAL satellite and the Swift BAT survey that it emits hard X-rays. Our observations showed a highly-absorbed...
Ueda, Yoshihiro, Eguchi, Satoshi, Terashima, Yuichi, Mushotzky, Richard, Tueller, Jack, Markwardt, Craig, ...
We present the Suzaku broad band observations of two AGNs detected by the Swift/BAT hard X-ray (>15 keV) survey that did not have previous X-ray data, Swift J0601.9-8636 and Swift J0138.6-4001. The...
Revealing the high energy emission from the obscured Seyfert galaxy MCG−5–23–16 with Suzaku (2007)
Reeves, James N., Awaki, Hisamitsu, Dewangan, Gulab C., Fabian, Andy C., Fukazawa, Yasushi, Gallo, Luigi, ...
The X-ray observatory Suzaku (2007)
Mitsuda, Kazuhisa, Bautz, Mark, Inoue, Hajime, Kelley, Richard L., Koyama, Katsuji, Kunieda, Hideyo, ...
Revealing the High Energy Emission from the Obscured Seyfert Galaxy MCG -5-23-16 with Suzaku (2006)
Reeves, James N., Awaki, Hisamitsu, Dewangan, Gulab C., Fabian, Andy C., Fukazawa, Yasushi, Gallo, Luigi, ...
We report on a 100 ks Suzaku observation of the bright, nearby (z=0.008486) Seyfert 1.9 galaxy MCG -5-23-16. The broad-band (0.4-100 keV) X-ray spectrum allows us to determine the nature of the high...
Yaqoob, Tahir, Murphy, Kendrah D., Griffiths, Richard E., Haba, Yoshito, Inoue, Hajime, Itoh, Takeshi, ...
We present detailed time-averaged X-ray spectroscopy in the 0.5--10 keV band of the Seyfert~1.9 galaxy NGC 2992 with the Suzaku X-ray Imaging Spectrometers (XIS). We model the complex continuum in...
Hicks, Amalia K., Mushotzky, Richard
We have analyzed XMM-Newton Optical Monitor (OM) UV (180-400 nm) data for a sample of 33 galaxies, of which 30 are cluster members. Nine of these are central cluster galaxies (CCGs) in cooling flow...
Radio Emission Associated with the ULX in Holmberg II (2005)
Miller, Neal A., Mushotzky, Richard, Neff, Susan
We report the detection of radio emission coincident with the ultraluminous X-ray source (ULX) in Holmberg II. The radio emission is diffuse and resolved, covering an area ~60 by 40 pc in extent and...
Ultra-Luminous Sources in Nearby Galaxies (2004)
I briefly review much of the X-ray and optical data on the nature of the ULXs in nearby galaxies. I present new results on radio emission, finding that the radio is usually rather luminous and...
The star-forming environment of a ULX in NGC 4559: an optical study (2004)
Soria, Roberto, Cropper, Mark, Pakull, Manfred, Mushotzky, Richard, Wu, Kinwah
We have studied the candidate optical counterparts and the stellar population in the star-forming complex around a bright ULX in NGC4559, using HST/WFPC2, XMM-Newton/OM, and ground-based data. We...
We discuss the very different methods in each wavelength band for selecting and finding Active Galactic Nuclei (AGN). We briefly review the history of the different techniques for finding AGN and...
DUO - the Dark Universe Observatory (2004)
Griffiths, Richard, Petre, Robert, Hasinger, Günther, Predehl, Peter, White, Nicholas E., Aschenbach, Bernd, ...
Chandra Observations and Optical Identification of Hard X-ray Sources Discovered with ASCA (2002)
Watanabe, Shin, Akiyama, Masayuki, Ueda, Yoshihiro, Ohta, Kouji, Mushotzky, Richard, Takahashi, Tadayuki, ...
We present the first results of the Chandra and optical follow-up observations of hard X-ray sources detected in the ASCA Medium Sensitivity Survey (AMSS). Optical identifications are made for five...
The X-ray Reflectors in the Nucleus of the Seyfert Galaxy NGC 1068 (2002)
Colbert, Edward, Weaver, Kim, Krolik, Julian, Mulchaey, John, Mushotzky, Richard
(abridged) Based on observations of the Seyfert nucleus in NGC1068 with ASCA, RXTE and BeppoSAX, we report the discovery of a flare (increase in flux by a factor of ~1.6) in the 6.7 keV Fe K line...
RXTE Investigation into Extended Hard X-ray Emission from Elliptical Galaxies (2000)
Loewenstein, Michael, Valinia, Azita, Mushotzky, Richard
We present results of the first RXTE investigation of hard X-ray emission from normal elliptical galaxies. Joint spectral analysis of RXTE PCA and ASCA GIS data for NGC 4472 and NGC 4649 reveals the...
Hard X-ray Observation of Abell 496 (2000)
Valinia, Azita, Arnaud, Keith, Loewenstein, Michael, Mushotzky, Richard, Kelley, Richard
We report the results of hard X-ray observations of Abell 496 (A496), a nearby relaxed cluster, using the Rossi X-ray Timing Explorer (RXTE). The 3-20 keV spectrum of this cluster is well-modeled by...
X-ray Observations of Groups and Clusters - A Relic of the High Redshift Universe (1999)
I review the evidence from clusters and groups of galaxies for `relic' evidence of the high redshift universe. Contrary to the received wisdom, clusters are old. Their x-ray emitting intergalactic...
Constraining the central engine of radio-loud AGNs (1999)
Sambruna, Rita M., Eracleous, Michael, Mushotzky, Richard
We present an X-ray spectral survey of radio-loud (RL) AGNs using ASCA and RXTE. The goal was to study the structure of their central engines and compare it to that of their radio-quiet (RQ)...
ASCA Observations of Radio-Loud AGNs (1998)
Sambruna, Rita, Eracleous, Michael, Mushotzky, Richard
We summarize the results of an X-ray spectroscopic survey of radio-loud AGNs observed with ASCA, using proprietary and archival data (public up to 1998 September). We briefly compare our results with...
Are Elliptical Galaxies Really Metal-Rich? (1997)
Loewenstein, Michael, Mushotzky, Richard
We review estimates of the metallicities in elliptical galaxies, with an emphasis on recent results from the ASCA satellite. X-ray spectra of elliptical galaxies are adequately fit by models...
Reply to ``Roles of SNIa and SNII in ICM Enrichment'' by Y. Ishimaru and N. Arimoto (1997)
Loewenstein, Michael, Mushotzky, Richard
We address a number of misunderstandings and misstatements contained in the paper ``Roles of SNIa and SNII in ICM Enrichment'' by Y. Ishimaru and N. Arimoto with regard to the papers by Mushotzky et...
Mushotzky, Richard, Loewenstein, Michael
We present the first large sample of accurate iron abundances and temperatures for clusters at redshifts greater than 0.14. We find that the Fe abundance shows little or no evolution out to redshift...
Systematic Errors in the Hubble Constant Based on Measurement of the Sunyaev-Zeldovich Effect (1997)
Roettiger, Kurt, Stone, James M., Mushotzky, Richard
Values of the Hubble constant reported to date which are based on measurement of the Sunyaev-Zeldovich (SZ) effect in clusters of galaxies are systematically lower than those derived by other methods...
Loewenstein, Michael, Mushotzky, Richard
Using X-ray temperature and surface brightness profiles of the hot intracluster medium derived from ASCA and ROSAT observations we place constraints on the dark matter and baryon fraction...
ASCA Observations of the Spectrum of the X-ray Background (1995)
Keith Gendreau, Richard Mushotzky, Andrew C. Fabian, Stephen S. Holt, Peter J. Serlemitsos, Yasushi Fukazawa, ...
We present initial results from ASCA on the spectrum of the Cosmic X-ray Background from 0.4 to 10 keV. About 250 ksec of deep survey data has been collected from the performance verification phase...
X-ray emission from clusters and groups of galaxies
Recent major advances in x-ray imaging and spectroscopy of clusters have allowed the determination of their mass and mass profile out to ≈1/2 the virial radius. In rich clusters, most of the...
X-ray emission from clusters and groups of galaxies
Recent major advances in x-ray imaging and spectroscopy of clusters have allowed the determination of their mass and mass profile out to ≈1/2 the virial radius. In rich clusters, most of the...