Evidence for an Intermediate Mass Black Hole in NGC 5408 X-1 (2009)
Strohmayer, Tod E., Mushotzky, Richard F.
We report the discovery with XMM-Newton of correlated spectral and timing behavior in the ultraluminous X-ray source (ULX) NGC 5408 X-1. An ~100 ksec pointing with XMM/Newton obtained in January,...
Tracing Star Formation in Cool Core Clusters with GALEX (2009)
Hicks, Amalia, Mushotzky, Richard F., Donahue, Megan
We present recent results from a GALEX investigation of star formation in 16 cooling core clusters of galaxies, selected to span a broad range in both redshift and central cooling time. Initial...
Suzaku Observations of Abell 1795: Cluster Emission to R_200 (2009)
Bautz, Marshall W., Miller, Eric D., Sanders, Jeremy S., Arnaud, Keith A., Mushotzky, Richard F., Porter, F. Scott, ...
We report Suzaku observations of the galaxy cluster Abell 1795 that extend to r_200 ~ 2 Mpc, the radius within which the mean cluster mass density is 200 times the cosmic critical density. These...
On Active Galactic Nuclei as Sources of Ultra-High Energy Cosmic Rays (2008)
George, Matthew R., Fabian, Andrew C., Baumgartner, Wayne H., Mushotzky, Richard F., Tueller, Jack
We measure the correlation between sky coordinates of the Swift BAT catalogue of active galactic nuclei with the arrival directions of the highest energy cosmic rays detected by the Auger...
OMCat: Catalogue of Serendipitous Sources Detected with the XMM-Newton Optical Monitor (2008)
Kuntz, K. D., Harrus, Ilana, McGlynn, Thomas A., Mushotzky, Richard F., Snowden, Steven L.
The Optical Monitor Catalogue of serendipitous sources (OMCat) contains entries for every source detected in the publicly available XMM-Newton Optical Monitor (OM) images taken in either the imaging...
The Submillimeter Frontier: A Space Science Imperative (2007)
John Mather, S. Harvey Moseley, David Leisawitz, Eli Dwek, Perry Hacking, Martin Harwit, ...
A major goal of modern astrophysics is to understand the processes by which the universe evolved from its initial simplicity, as seen in measurements of the Cosmic Microwave Background (CMB), to the...
X-ray properties of an Unbiased Hard X-ray Detected Sample of AGN (2007)
Winter, Lisa M., Mushotzky, Richard F., Tueller, Jack, Markwardt, Craig
The SWIFT gamma ray observatory's Burst Alert Telescope (BAT) has detected a sample of active galactic nuclei (AGN) based solely on their hard X-ray flux (14-195 keV). In this paper, we present for...
Quasi-Periodic Variability in NGC 5408 X-1 (2007)
Strohmayer, Tod E., Mushotzky, Richard F., Winter, Lisa, Soria, Roberto, Uttley, Phil, Cropper, Mark
We report the discovery with XMM-Newton of quasiperiodic variability in the 0.2 - 10 keV X-ray flux from the ultraluminous X-ray source NGC 5408 X-1. The average power spectrum of all EPIC-pn data...
Probing the disk-jet connection of the radio galaxy 3C 120 observed with Suzaku (2007)
Kataoka, Jun, Reeves, James N., Iwasawa, Kazushi, Markowitz, Alex G., Mushotzky, Richard F., Arimoto, Makoto, ...
Ajello, Marco, Greiner, Jochen, Rau, Arne, Kanbach, Gottfried, Strong, Andrew W., Tueller, Jack, ...
Probing the Disk-jet Connection of the Radio Galaxy 3C120 Observed with Suzaku (2006)
Kataoka, Jun, Reeves, James N., Iwasawa, Kazushi, Markowitz, Alex G., Mushotzky, Richard F., Arimoto, Makoto, ...
Broad line radio galaxies (BLRGs) are a rare type of radio-loud AGN, in which the broad optical permitted emission lines have been detected in addition to the extended jet emission. Here we report on...
Winter, Lisa M., Mushotzky, Richard F., Reynolds, Christopher S.
(abridged) In this paper, we examined XMM Newton EPIC spectra of 14 ultra-luminous X-ray sources (ULXs)in addition to the XMM RGS spectra of two sources (Holmberg II X-1 and Holmberg IX X-1). We...
Oxygen and Iron Abundances in Nearby Galaxies Using Ultraluminous X-ray Sources (2005)
Winter, Lisa M., Mushotzky, Richard F., Reynolds, Christopher S.
We determined oxygen and iron abundances of the interstellar medium (ISM) using K-shell (O) and L-shell (Fe) X-ray photo-ionization edges towards Ultra luminous X-ray sources (ULXs). We determine the...
Baumgartner, Wayne H., Mushotzky, Richard F.
We present measurements of the oxygen abundance of the Milky Way's ISM by observing the K-shell X-ray photoionization edge towards galaxy clusters. This effect is most easily observed towards objects...
A Simultaneous RXTE and XMM-Newton Observation of the Broad-Line Radio Galaxy 3C 111 (2004)
Lewis, Karen T., Eracleous, Michael, Gliozzi, Mario, Sambruna, Rita M., Mushotzky, Richard F.
We present the results of simultaneous XMM-Newton and RXTE observations of the Broad-Line Radio Galaxy 3C 111. We find that the Compton reflection bump is extremely weak, however, broad residuals are...
Radio Detections of Ultraluminous X-ray Sources (2004)
Miller, Neal A., Neff, Susan G., Mushotzky, Richard F.
We present some results from an archival VLA study of ultraluminous X-ray source s (ULXs). These unresolved non-nuclear X-ray sources have luminosities (L_X >= 1 0^39 ergs/sec) which may require...
XMM Observations of an IXO in NGC 2276 (2003)
Davis, David S., Mushotzky, Richard F.
We present the results from a ~53 ksec XMM observation of NGC 2276. This galaxy has an unusual optical morphology with the disk of this spiral appearing to be truncated along the western edge. This...
Probable intermediate mass black holes in NGC4559: XMM-Newton spectral and timing constraints (2003)
Cropper, Mark, Soria, Roberto, Mushotzky, Richard F., Wu, Kinwah, Markwardt, Craig B., Pakull, Manfred
We have examined X-ray and optical observations of two ultra-luminous X-ray sources, X7 and X10 in NGC4559, using XMM-Newton, Chandra and HST. The UV/X-ray luminosity of X7 exceeds 2.1e40 erg/s in...
Cluster of Galaxies: An X-ray Perspective (2003)
There has been extensive recent progress in X-ray observations of clusters of galaxies with the analysis of the entire ASCA database and recent new results from Beppo-SAX, Chandra, and XMM-Newton....
Discovery of X-ray QPOs from an Ultra-luminous X-ray Source in M82: Evidence Against Beaming (2003)
Strohmayer, Tod E., Mushotzky, Richard F.
We report the discovery with the EPIC CCD cameras onboard XMM-Newton of a 54 mHz quasiperiodic oscillation (QPO) in the > 2 keV X-ray flux from an ultraluminous X-ray source (ULX) in the starburst...
An X-ray Atlas of Groups of Galaxies (2003)
Mulchaey, John S., Davis, David S., Mushotzky, Richard F., Burstein, David
A search was conducted for a hot intragroup medium in 109 low-redshift galaxy groups observed with the ROSAT PSPC. Evidence for diffuse, extended X-ray emission is found in at least 61 groups....
The Ionized Gas and Nuclear Environment in NGC 3783 II. Averaged HST/STIS and FUSE Spectra (2002)
Gabel, Jack R., Crenshaw, D. Michael, Kraemer, Steven B., Brandt, W. N., George, Ian M., Hamann, Frederick W., ...
We present observations of the intrinsic absorption in the Seyfert 1 galaxy NGC 3783 obtained with the STIS/HST and FUSE. We have coadded multiple STIS and FUSE observations to obtain a high S/N...
Intermediate Element Abundances in Galaxy Clusters (2002)
Baumgartner, Wayne H., Horner, Donald J., Mushotzky, Richard F.
We present the abundances of the intermediate elements obtained by performing a stacked analysis of all the galaxy clusters in the archive of the X-ray telescope ASCA. We give the abundances of Fe,...
Observational Tests of the Mass-Temperature Relation for Galaxy Clusters (1999)
Horner, Donald J., Mushotzky, Richard F., Scharf, Caleb A.
We examine the relationship between the mass and x-ray gas temperature of galaxy clusters using data drawn from the literature. Simple theoretical arguments suggest that the mass of a cluster is...
The Submillimeter Frontier: A Space Science Imperative (1998)
Mather, John C., Moseley, S. Harvey, Leisawitz, David, Dwek, Eli, Hacking, Perry, ...
A major goal of modern astrophysics is to understand the processes by which the universe evolved from its initial simplicity, as seen in measurements of the Cosmic Microwave Background, to the...
Crenshaw, D. Michael, Kraemer, Steven B., Boggess, Albert, Maran, Stephen P., Mushotzky, Richard F., Wu, Chi-Chao
We present a study of the intrinsic absorption lines in the ultraviolet spectra of Seyfert 1 galaxies. We find that the fraction of Seyfert 1 galaxies that show absorption associated with their...
Mass and Metallicity of Five X-ray Bright Galaxy Groups (1998)
Hwang, Una, Mushotzky, Richard F., Burns, Jack O., Fukazawa, Yasushi, White, Richard A., ...
We present ASCA X-ray observations of a sample of five groups selected from a cross-correlation of the ROSAT All-Sky Survey with the White et al. optical catalog of groups. These X-ray bright groups...
The Enrichment History of Hot Gas in Poor Galaxy Groups (1998)
Davis, David S., Mulchaey, John S., Mushotzky, Richard F.
We have analyzed the ASCA SIS and GIS data for seventeen groups and determined the average temperature and abundance of the hot x-ray emitting gas. For groups with gas temperatures less than 1.5 keV...
Detection of an iron K Emission Line from the LINER NGC 4579 (1998)
Terashima, Yuichi, Kunieda, Hideyo, Misaki, Kazutami, Mushotzky, Richard F., Ptak, Andrew F., Reichert, Gail A.
We present the results of an ASCA observation of the LINER NGC 4579. A point-like X-ray source is detected at the nucleus with a 2-10 keV luminosity of 1.5x10^41 ergs/s assuming a distance of 16.8...
A dusty X-ray absorber in the Perseus Cluster ? (1998)
Arnaud, Keith A., Mushotzky, Richard F.
We have analyzed 0.35-7.5 keV X-ray spectra of the center of the Perseus cluster collected using the Broad Band X-Ray Telescope (BBXRT) on the Astro-1 mission. These spectra are particularly useful...
Resolving the Intrinsic C IV Absorption in the Seyfert 1 Galaxy NGC 3516 (1997)
Crenshaw, D. Michael, Maran, Stephen P., Mushotzky, Richard F.
We observed the Seyfert 1 galaxy NGC 3516 with the Goddard High Resolution Spectrograph on the Hubble Space Telescope, and obtained UV spectra at a resolution of about 20,000 in the redshifted C IV...
Evidence for Relativistic Outflows in Narrow-line Seyfert 1 Galaxies (1997)
Leighly, Karen M., Mushotzky, Richard F., Nandra, Kirpal, Forster, Karl
We report the observation of features near 1 keV in the ASCA spectra from three ``Narrow Line Seyfert 1'' (NLS1) galaxies. We interpret these as oxygen absorption in a highly relativistic outflow. If...
Supernovae Types Ia/II and Intracluster Medium Enrichment (1997)
Gibson, Brad K., Loewenstein, Mike, Mushotzky, Richard F.
We re-examine the respective roles played by supernovae (SNe) Types Ia and II in enriching the intracluster medium (ICM) of galaxy clusters, in light of the recent downward shift of the ASCA...
X-ray Observations of the Broad-Line Radio Galaxy 3C 390.3 (1997)
Leighly, Karen M., O'Brien, Paul T., Edelson, Rick, George, Ian M., Malkan, Matthew A., Matsuoka, Masaru, ...
We present the data and preliminary analysis for a series of 90 ROSAT HRI and two ASCA observations of the broad-line radio galaxy 3C 390.3. These data were obtained during the period 1995 January 2...
The Velocity Dispersion -- Temperature Correlation from a Limited Cluster Sample (1995)
Bird, Christina M., Mushotzky, Richard F., Metzler, Christopher A.
Most studies of correlations between X-ray and optical properties of galaxy clusters have used the largest samples of data available, regardless of the morphological types of clusters included. Given...