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...
First lensing measurements of SZ-discovered clusters (2009)
McInnes, Rachel N., Menanteau, Felipe, Heavens, Alan F., Hughes, John P., Jimenez, Raul, Massey, Richard, ...
We present the first lensing mass measurements of Sunyaev-Zel'dovich (SZ) selected clusters. Using optical imaging from the Southern Cosmology Survey (SCS), we present weak lensing masses for three...
Badenes, Carles, Bravo, Eduardo, Hughes, John P.
The Mn to Cr mass ratio in supernova ejecta has recently been proposed as a tracer of Type Ia SN progenitor metallicity. We review the advantages and problems of this observable quantity, and discuss...
Menanteau, Felipe, Hughes, John P., Jimenez, Raul, Hernandez-Monteagudo, Carlos, Verde, Licia, Kosowsky, Arthur, ...
Southern Cosmology Survey III: QSO's from Combined GALEX and Optical Photometry (2008)
Jimenez, Raul, Spergel, David N., Niemack, Michael D., Menanteau, Felipe, Hughes, John P., Verde, Licia, ...
We present catalogs of QSO candidates selected using photometry from GALEX combined with SDSS in the Stripe 82 region and Blanco Cosmology Survey (BCS) near declination -55 degrees. The SDSS region...
Physical Properties of Four SZE-Selected Galaxy Clusters in the Southern Cosmology Survey (2008)
Menanteau, Felipe, Hughes, John P.
We present the optical and X-ray properties of four clusters recently discovered by the South Pole Telescope (SPT) using the Sunyaev-Zel'dovich effect (SZE). The four clusters are located in one of...
Chandra and XMM Observations of the Composite Supernova Remnant G327.1-1.1 (2008)
Temim, Tea, Slane, Patrick, Gaensler, B. M., Hughes, John P., Van Der Swaluw, Eric
We present new X-ray imaging and spectroscopy of a composite supernova remnant G327.1-1.1 using the Chandra and XMM-Newton X-ray observatories. G327.1-1.1 has an unusual morphology consisting of a...
Park, Sangwook, Kargaltsev, Oleg, Pavlov, George G., Mori, Koji, Slane, Patrick O., Hughes, John P., ...
We present results from our X-ray data analysis of the SNR G330.2+1.0 and its CCO, CXOU J160103.1--513353 (J1601). Using our XMM-Newton and Chandra observations, we find that the X-ray spectrum of...
Badenes, Carles, Bravo, Eduardo, Hughes, John P.
The Mn to Cr mass ratio in supernova ejecta has recently been proposed as a tracer of Type Ia SN progenitor metallicity. We review the advantages and problems of this observable quantity, and discuss...
Menanteau, Felipe, Hughes, John P., Jimenez, Raul, Hernandez-Monteagudo, Carlos, Verde, Licia, Kosowsky, Arthur, ...
We present first results from the Southern Cosmology Survey, a new multiwavelength survey of the southern sky coordinated with the Atacama Cosmology Telescope (ACT), a recently commissioned...
Badenes, Carles, Bravo, Eduardo, Hughes, John P.
We propose a new method to measure the metallicity of Type Ia supernova progenitors using Mn and Cr lines in the X-ray spectra of young supernova remnants. We show that the Mn to Cr mass ratio in...
Cassam-Chenai, Gamil, Hughes, John P., Reynoso, Estela M., Badenes, Carles, Moffett, David
Using radio, X-ray and optical observations, we present evidence for morphological changes due to efficient cosmic ray ion acceleration in the structure of the southeastern region of the supernova...
Badenes, Carles, Hughes, John P., Cassam-Chenai, Gamil, Bravo, Eduardo
We examine the dynamics and X-ray spectrum of the young Type Ia supernova remnant 0509-67.5 in the context of the recent results obtained from the optical spectroscopy of its light echo. Our goal is...
Evidence for Resonance Line Scattering in the Suzaku X-ray Spectrum of the Cygnus Loop (2008)
Miyata, Emi, Masai, Kuniaki, Hughes, John P.
We present an analysis of the Suzaku observation of the northeastern rim of the Cygnus Loop supernova remnant. The high detection efficiency together with the high spectral resolution of the Suzaku...
Chandra ACIS survey of M33 (ChASeM33): a first look (2008)
Plucinsky, Paul P., Williams, Benjamin, Long, Knox S., Gaetz, Terrance J., Sasaki, Manami, Pietsch, Wolfgang, ...
NONTHERMAL X-RAY EMISSION FROM THE SHELL-TYPE SNR G347.3-0.5 (2007)
Patrick Slane, Thomas M. Dame, John P. Hughes, Paul P. Plucinsky, Anne Green
Recent ASCA observations of G347.3-0.5, an SNR discovered in the ROSAT All-Sky Survey, reveal nonthermal emission from a region along the northwestern shell (Koyama et al. 1997). Here we report on...
Tokoi, Kazuyo, Sato, Kosuke, Ishisaki, Yoshitaka, Ohashi, Takaya, Yamasaki, Noriko Y., Nakazawa, Kazuhiro, ...
We present results of 120 ks observation of a compact group of galaxies HCG~62 ($z=0.0145$) with Suzaku XIS and HXD-PIN\@. The XIS spectra for four annular regions were fitted with two temperature...
Hughes, John P., Chugai, Nikolai, Chevalier, Roger, Lundqvist, Peter, Schlegel, Eric
We set sensitive upper limits to the X-ray emission of four Type Ia supernovae (SNe Ia) using the Chandra X-ray Observatory. SN 2002bo, a normal, although reddened, nearby SN Ia, was observed 9.3...
A Half-Megasecond Chandra Observation of the Oxygen-Rich Supernova Remnant G292.0+1.8 (2007)
Park, Sangwook, Hughes, John P., Slane, Patrick O., Burrows, David N., Gaensler, B. M., Ghavamian, Parviz
We report on our initial analysis of a deep 510 ks observation of the Galactic oxygen-rich supernova remnant (SNR) G292.0+1.8 with the {\it Chandra X-ray Observatory}. Our new {\it Chandra} ACIS-I...
Chandra ACIS Survey of M33 (ChASeM33): A First Look (2007)
Plucinsky, Paul P., Williams, Benjamin, Long, Knox S., Gaetz, Terrance J., Sasaki, Manami, Pietsch, Wolfgang, ...
We present an overview of the Chandra ACIS Survey of M33 (ChASeM33): A Deep Survey of the Nearest Face-on Spiral Galaxy. The 1.4 Ms survey covers the galaxy out to $R \approx 18\arcmin (\approx 4$...
Suzaku Observations of the North Polar Spur: Evidence for Nitrogen Enhancement (2007)
Miller, Eric D., Tsunemi, Hiroshi, Bautz, Mark W., McCammon, Dan, Fujimoto, Ryuichi, Hughes, John P., ...
We present observations of the North Polar Spur (NPS) using the X-ray Imaging Spectrometer (XIS) aboard the Suzaku X-ray satellite. The NPS is a large region of enhanced soft X-ray and radio emission...
Takahashi, Tadayuki, Tanaka, Takaaki, Uchiyama, Yasunobu, Hiraga, Junko S., Nakazawa, Kazuhiro, Watanabe, Shin, ...
We report on results from Suzaku broadband X-ray observations of the southwest part of the Galactic supernova remnant (SNR) RX J1713.7-3946 with an energy coverage of 0.4-40 keV. The X-ray spectrum,...
Suzaku wide-band observations of SN 1006 (2007)
Bamba, Aya, Fukazawa, Yasushi, Hiraga, Junko S., Hughes, John P., Katagiri, Hideaki, Kokubun, Motohide, ...
We report on the wide band spectra of SN 1006 as observed by Suzaku. Thermal and nonthermal emission are successfully resolved thanks to the excellent spectral response of Suzaku's X-ray CCD XIS. The...
X-Ray Spectroscopy of SN 1006 with Suzaku (2007)
Yamaguchi, Hiroya, Koyama, Katsuji, Katsuda, Satoru, Nakajima, Hiroshi, Hughes, John P., Bamba, Aya, ...
We report on observations of SN 1006 with the X-ray Imaging Spectrometers (XIS) on board Suzaku. We firmly detected K-shell emission from Fe, for the first time, and find that the Fe ionization state...
Gaetz, Terrance J., Blair, William P., Hughes, John P., Winkler, P. Frank, Long, Knox S., Pannuti, Thomas G., ...
We present and interpret new X-ray data for M33SNR21, the brightest X-ray supernova remnant (SNR) in M33. The SNR is in seen projection against (and appears to be interacting with) the bright HII...
Sehgal, Neelima, Hughes, John P., Wittman, David, Margoniner, Vera, Tyson, J. Anthony, Gee, Perry, ...
We compare X-ray and weak-lensing masses for four galaxy clusters that comprise the top-ranked shear-selected cluster system in the Deep Lens Survey. The weak-lensing observations of this system,...
Chandra X-Ray Study of Galactic Supernova Remnant G299.2-2.9 (2007)
Park, Sangwook, Slane, Patrick O., Hughes, John P., Mori, Koji, Burrows, David N., Garmire, Gordon P.
We report on observations of the Galactic supernova remnant (SNR) G299.2$-$2.9 with the {\it Chandra X-Ray Observatory}. The high resolution images with {\it Chandra} resolve the X-ray-bright knots,...
Gelfand, Joseph D., Gaensler, B. M., Slane, Patrick O., Patnaude, Daniel J., Hughes, John P., Camilo, Fernando
We present new observational results obtained for the Galactic non-thermal radio source G328.4+0.2 to determine both if this source is a pulsar wind nebula or supernova remnant, and in either case,...
Ghavamian, Parviz, Blair, William P., Sankrit, Ravi, Hughes, John P., Raymond, John C.
We present the first far ultraviolet (FUV) spectra of the four known Balmer-dominated supernova remnants (SNRs) in the Large Magellanic Cloud, acquired with the Far Ultraviolet Spectroscopic...
Badenes, Carles, Hughes, John P., Bravo, Eduardo, Langer, Norbert
We explore the relationship between the models for progenitor systems of Type Ia supernovae and the properties of the supernova remnants that evolve after the explosion. Most models for Type Ia...
The blast wave of Tycho's supernova remnant (2007)
Cassam-Chenai, Gamil, Hughes, John P., Ballet, Jean, Decourchelle, Anne
We use the Chandra X-ray Observatory to study the region in the Tycho supernova remnant between the blast wave and the shocked ejecta interface or contact discontinuity. This zone contains all the...
The blast wave of Tycho's supernova remnant (2007)
Cassam-Chenai, Gamil, Hughes, John P., Ballet, Jean, Decourchelle, Anne
We use the Chandra X-ray Observatory to study the region in the Tycho supernova remnant between the blast wave and the shocked ejecta interface or contact discontinuity. This zone contains all the...
Sato, Kosuke, Yamasaki, Noriko Y., Ishida, Manabu, Ishisaki, Yoshitaka, Ohashi, Takaya, Kawahara, Hajime, ...
We carried out observations of the central and 20' east offset regions of the cluster of galaxies Abell 1060 with Suzaku. Spatially resolved X-ray spectral analysis has revealed temperature and...
The blast wave of Tycho's supernova remnant (2007)
Cassam-Chenai, Gamil, Hughes, John P., Ballet, Jean, Decourchelle, Anne
We use the Chandra X-ray Observatory to study the region in the Tycho supernova remnant between the blast wave and the shocked ejecta interface or contact discontinuity. This zone contains all the...
The X-ray observatory Suzaku (2007)
Mitsuda, Kazuhisa, Bautz, Mark, Inoue, Hajime, Kelley, Richard L., Koyama, Katsuji, Kunieda, Hideyo, ...
The blast wave of Tycho's supernova remnant (2007)
Cassam-Chenai, Gamil, Hughes, John P., Ballet, Jean, Decourchelle, Anne
We use the Chandra X-ray Observatory to study the region in the Tycho supernova remnant between the blast wave and the shocked ejecta interface or contact discontinuity. This zone contains all the...
Cassam-Chenai, Gamil, Hughes, John P., Reynoso, Estela M., Badenes, Carles, Moffett, David
Using radio, X-ray and optical observations, we present evidence for morphological changes due to efficient cosmic ray ion acceleration in the structure of the southeastern region of the supernova...
Cassam-Chenai, Gamil, Hughes, John P., Reynoso, Estela M., Badenes, Carles, Moffett, David
Using radio, X-ray and optical observations, we present evidence for morphological changes due to efficient cosmic ray ion acceleration in the structure of the southeastern region of the supernova...
A Suzaku Observation of the Low-Ionization Fe-Line Emission from RCW 86 (2006)
Ueno, Masaru, Sato, Rie, Kataoka, Jun, Bamba, Aya, Harrus, Ilana, Hiraga, Junko, ...
The newly operational X-ray satellite Suzaku observed the southwestern quadrant of the supernova remnant (SNR) RCW 86 in February 2006 to study the nature of the 6.4 keV emission line first detected...
Suzaku Observations of the Local and Distant Hot ISM (2006)
Smith, Randall K., Bautz, Mark W., Edgar, Richard J., Hamaguchi, Kenji, Hughes, John P., Ishida, Manabu, ...
Suzaku observed the molecular cloud MBM12 and a blank field less than 3 degrees away to separate the local and distant components of the diffuse soft X-ray background. Towards MBM12, a local (D< 275...
Discovery of a Candidate Central Compact Object in the Galactic Nonthermal SNR G330.2+1.0 (2006)
Park, Sangwook, Mori, Koji, Kargaltsev, Oleg, Slane, Patrick O., Hughes, John P., Burrows, David N., ...
We report on the discovery of a pointlike source (CXOU J160103.1$-$513353) at the center of a Galactic supernova remnant (SNR) G330.2+1.0 with {\it Chandra X-Ray Observatory}. The X-ray spectrum fits...
Matsushita, Kyoko, Fukazawa, Yasushi, Hughes, John P., Kitaguchi, Takao, Makishima, Kazuo, Nakazawa, Kazuhiro, ...
The metallicity distribution in the Fornax cluster was studied with the XIS instrument onboard the Suzaku satellite. K-shell lines of O and Mg were resolved clearly, and the abundances of O, Mg, Si,...
Suzaku Observations of HESS J1616-508: Evidence for a Dark Particle Accelerator (2006)
Matsumoto, Hironori, Ueno, Masaru, Bamba, Aya, Hyodo, Yoshiaki, Mori, Hideyuki, Uchiyama, Hideki, ...
We observed the bright unidentified TeV gamma-ray source HESS J1616-508 with the X-ray Imaging Spectrometers onboard the Suzaku satellite. No X-ray counterpart was found to a limiting flux of 3.1e-13...
Discovery of a possible X-ray counterpart to HESS J1804-216 (2006)
Bamba, Aya, Koyama, Katsuji, Hiraga, Junko S., Hughes, John P., Kohmura, Takayoshi, Kokubun, Motohide, ...
Suzaku deep observations have discovered two highly significant nonthermal X-ray sources, Suzaku J1804$-$2142 (Src 1) and Suzaku J1804$-$2140 (Src 2), positionally coincident with the unidentified...
Search for Oxygen Emission from Warm-Hot Intergalactic Medium around A2218 with Suzaku (2006)
Takei, Yoh, Ohashi, Takaya, Henry, J. Patrick, Mitsuda, Kazuhisa, Fujimoto, Ryuichi, Tamura, Takayuki, ...
We searched for redshifted O emission lines from the possible warm-hot intergalactic medium (WHIM) surrounding the cluster of galaxies A2218 at z=0.1756 using the XIS instrument on Suzaku. This...
The Chandra View of the Supernova Remnant 0506-68.0 in the Large Magellanic Cloud (2006)
Hughes, John P., Rafelski, Marc, Warren, Jessica S., Rakowski, Cara, Slane, Patrick, Burrows, David, ...
A new Chandra observation of SNR 0506-68.0 (also called N23) reveals a complex, highly structured morphology in the low energy X-ray band and an isolated compact central object in the high energy...
Rakowski, Cara E., Badenes, Carles, Gaensler, B. M., Gelfand, Joseph D., Hughes, John P., Slane, Patrick O.
In this paper we use recent X-ray and radio observations of the ejecta-rich Galactic supernova remnant (SNR) G337.2-0.7 to determine properties of the supernova (SN) explosion that formed this...
Six Years of Chandra Observations of Supernova Remnants (2005)
Weisskopf, Martin C., Hughes, John P.
We present a review of the first six years of Chandra X-ray Observatory observations of supernova remnants. From the official "first-light" observation of Cassiopeia A that revealed for the first...
Badenes, Carles, Borkowski, Kazimierz J., Hughes, John P., Hwang, Una, Bravo, Eduardo
In this paper we use high quality X-ray observations from XMM-Newton and Chandra to gain new insights into the explosion that originated Tycho's supernova 433 years ago. We perform a detailed...
Ghavamian, Parviz, Hughes, John P., Willliams, T. B.
We present results of an in-depth optical study of the core collapse supernova remnant G292.0+1.8 using the Rutgers Fabry-Perot (RFP) imaging spectrometer. Our observations provide a detailed picture...
Infrared echoes near the Supernova remnant Cassiopeia A (2005)
Krause, Oliver, Rieke, George H., Birkmann, Stephan M., Le Floc'h, Emeric, Gordon, Karl D., Egami, Eiichi, ...
Two images of Cassiopeia A obtained at 24 micrometers with the Spitzer Space Telescope over a 1-year time interval show moving structures outside the shell of the supernova remnant to a distance of...
A Million-Second Chandra View of Cassiopeia A (2004)
Hwang, Una, Laming, J. Martin, Badenes, Carles, Berendse, Fred, Blondin, John, Cioffi, Denis, ...
We introduce a million-second observation of the supernova remnant Cassiopeia A with the Chandra X-ray Observatory. The bipolar structure of the Si-rich ejecta (NE jet and SW counterpart) is clearly...
Raising the Dead: Clues to Type Ia Supernova Physics from the Remnant 0509-67.5 (2004)
Warren, Jessica S., Hughes, John P.
We present Chandra X-ray observations of the young supernova remnant (SNR) 0509-67.5 in the Large Magellanic Cloud (LMC), believed to be the product of a Type Ia supernova (SN Ia). The remnant is...
Hughes, John P., Friedman, Robert B., Slane, Patrick, Park, Sangwook
We report the discovery of pulsed X-ray emission from the compact object CXOU J112439.1-591620 within the Galactic supernova remnant G292.0+1.8 using the High Resolution Camera on the Chandra X-Ray...
X-Ray Observations of the Most Massive DLS Shear-Selected Galaxy Clusters (2004)
Hughes, John P., Dell'Antonio, Ian, Hennawi, Joseph, Margoniner, Vera, Molnar, Sandor, Norman, Dara, ...
We report on preliminary results of our X-ray survey of the most massive clusters currently identified from the Deep Lens Survey (DLS). The DLS cluster sample is selected based on weak lensing shear,...
Park, Sangwook, Hughes, John P., Slane, Patrick O., Burrows, David N., Roming, Peter W. A., Nousek, John A., ...
We continue our analysis of the Galactic oxygen-rich supernova remnant (SNR) G292.0+1.8, which was observed with the {\it Chandra X-ray Observatory}. The high angular resolution {\it Chandra} data...
An X-ray study of the supernova remnant G18.95-1.1 (2003)
Harrus, Ilana M., Slane, Patrick O., Hughes, John P., Plucinsky, Paul P.
We present an analysis of data from both the Rontgen Satellite (ROSAT), and the Advanced Satellite for Cosmology and Astrophysics (ASCA) of the supernova remnant (SNR) G18.95-1.1. We find that the...
X-ray Observations of the Compact Source in CTA 1 (2003)
Slane, Patrick, Zimmerman, Erik R., Hughes, John P., Seward, Frederick D., Gaensler, Bryan M., Clarke, Melanie J.
The point source RX J0007.0+7302, at the center of supernova remnant CTA 1, was studied using the X-Ray Multi-mirror Mission. The X-ray spectrum of the source is consistent with a neutron star...
0103-72.6: A New Oxygen-Rich Supernova Remnant in the Small Magellanic Cloud (2003)
Park, Sangwook, Hughes, John P., Burrows, David N., Slane, Patrick O., Nousek, John A., Garmire, Gordon P.
0103$-$72.6, the second brightest X-ray supernova remnant (SNR) in the Small Magellanic Cloud (SMC), has been observed with the {\it Chandra X-Ray Observatory}. Our {\it Chandra} observation...
DO ARTIFICIAL NESTS REVEAL MEANINGFUL PATTERNS OF PREDATION IN KANSAS GRASSLANDS? (2003)
Robert J. Robel, John P. Hughes, Timothy D. Keane, Kenneth E. Kemp
We determined the fates of artificial and natural bird nests in Conservation Reserve Program (CRP) fields in northeastern Kansas from mid May through early August 1994. The CRP fields had been...
Donahue, Megan, Gaskin, Jessica A., Patel, Sandeep K., Joy, Marshall, Clowe, Doug, Hughes, John P.
We present new Chandra X-ray observations of the luminous X-ray cluster, MS0451.6-0305, at z=0.5386. Spectral imaging data for the cluster are consistent with an isothermal cluster of 10.0 - 10.6...
Detection of Magnesium-Rich Ejecta in the Middle-Aged Supernova Remnant N49B (2003)
Park, Sangwook, Hughes, John P., Slane, Patrick O., Burrows, David N., Warren, Jess Ica S., Garmire, Gordon P., ...
The middle-aged supernova remnant (SNR) N49B in the Large Magellanic Cloud has been observed with the {\it Chandra X-Ray Observatory}. The superb angular resolution of {\it Chandra} resolves the...
An X-Ray Pulsar in the Oxygen-Rich Supernova Remnant G292.0+1.8 (2003)
Hughes, John P., Slane, Patrick O., Park, Sangwook, Roming, Peter W. A., Burrows, David N.
We report the discovery of pulsed X-ray emission from the compact object CXOU J112439.1-591620 within the supernova remnant (SNR) G292.0+1.8 using the High Resolution Camera on the Chandra X-ray...
Rakowski, Cara E., Ghavamian, Parviz, Hughes, John P.
We present analysis and modeling of X-ray spectra from the blast wave shock of DEM L71. We have used both Chandra ACIS-S data and optical Fabry-Perot spectra of the blast wave to measure the electron...
Ghavamian, Parviz, Rakowski, Cara E., Hughes, John P., Williams, T. B.
We present the results from Fabry-Perot imaging spectroscopy of the Balmer-dominated supernova remnant DEM L71 (0505-67.9) in the LMC. Spectra extracted from the entire circumference of the blast...
Iron-Rich Ejecta in the Supernova Remnant DEM L71 (2002)
Hughes, John P., Ghavamian, Parviz, Rakowski, Cara E., Slane, Patrick O.
Chandra X-ray observations of DEM L71, a supernova remnant (SNR) in the Large Magellanic Cloud (LMC), reveal a clear double shock morphology consisting of an outer blast wave shock surrounding a...
X-Ray Emission from Multi-Phase Shock in the Large Magellanic Cloud Supernova Remnant N49 (2002)
Park, Sangwook, Burrows, David N., Garmire, Gordon P., Nousek, John A., Hughes, John P., Williams, Rosa Murphy
The supernova remnant (SNR) N49 in the Large Magellanic Cloud has been observed with the Advanced CCD Imaging Spectrometer (ACIS) on board the {\it Chandra X-Ray Observatory}. The superb angular...
Warren, Jessica S., Hughes, John P., Slane, Patrick O.
We present Chandra X-ray observations of the supernova remnant (SNR) N63A in the Large Magellanic Cloud (LMC). N63A, one of the brightest LMC remnants, is embedded in an H II region and probably...
The Radial Structure of SNR N103B (2002)
Lewis, Karen T., Burrows, David N., Hughes, John P., Slane, Patrick O., Garmire, Gordon P., Nousek, John A.
We report on the results from a Chandra ACIS observation of the young, compact, supernova remnant N103B. The unprecedented spatial resolution of Chandra reveals sub-arcsecond structure, both in the...
The crypt::RC6 and crypt::serpent extensions to Perl / (2002)
Thesis (M.S.)--Frostburg State University, 2002.
Park, Sangwook, Roming, Peter W. A., Hughes, John P., Slane, Patrick O., Burrows, David N., Garmire, Gordon P., ...
We present results from the observation of the young Galactic supernova remnant (SNR) G292.0+1.8 with the Advanced CCD Imaging Spectrometer (ACIS) on board the {\it Chandra X-ray Observatory}. In the...
An X-Ray Study of the Supernova Remnant G290.1-0.8 (2001)
Slane, Patrick, Smith, Randall K., Hughes, John P., Petre, Robert
G290.1-0.8 (MSH 11-61A) is a supernova remnant (SNR) whose X-ray morphology is centrally bright. However, unlike the class of X-ray composite SNRs whose centers are dominated by nonthermal emission,...
The Small-scale Structure of N103B - Nature of Nuture? (2001)
Lewis, Karen T., Burrows, David N., Hughes, John P., Slane, Patrick, Garmire, Gordon P., Nousek, John A.
We present new results from a 40.8 ks Chandra ACIS observation of the young supernova remnant (SNR) N103B located in the Large Magellanic Cloud. The high resolution Chandra image reveals structure at...
A Pulsar Wind Nebula in the Oxygen-Rich Supernova Remnant G292.0+1.8 (2001)
Hughes, John P., Slane, Patrick O., Burrows, David N., Garmire, Gordon, Nousek, John A.
Using the Chandra X-ray Observatory we have discovered a diffuse, center-filled region of hard X-ray emission within the young, oxygen-rich supernova remnant (SNR) G292.0+1.8. Near the peak of this...
Young Supernova Remnants in the Magellanic Clouds (2001)
There are a half-dozen or so young supernova remnants in the Magellanic Clouds that display one or more of the following characteristics: high velocity (>1000 km/s) emission, enhanced metallicity, or...
Sullivan, Robert M, Hughes, John P, Lionberger, James E
Historically, the lesser prairie-chicken (Tympanuchus pallidicinctus) occurred in sandy rangeland throughout the northeastern and southwestern (Permian Basin) regions of the Texas Panhandle. Analyses...
RXJ 0852.0-0462: Another Nonthermal Shell-Type SNR (G266.2-1.2) (2000)
Slane, Patrick, Hughes, John P., Edgar, Richard J., Plucinsky, Paul P., Miyata, Emi, Tsunemi, Hiroshi, ...
The newly discovered supernova remnant G266.2-1.2 (RX J0852.0--0462), along the line of sight to the Vela SNR, was observed with ASCA for 120 ks. We find that the X-ray spectrum is featureless, and...
The Expansion of the X-ray Remnant of Tycho's Supernova (SN1572) (2000)
Two ROSAT high resolution images separated by nearly five years have been used to determine the expansion of the X-ray remnant of Tycho's supernova (SN1572). The current expansion rate averaged over...
Two New Ejecta-Dominated Galactic Supernova Remnants: G337.2-0.7 and G309.2-0.6 (2000)
Rakowski, Cara E., Hughes, John P., Slane, Patrick
We present the analysis of new X-ray observations of two Galactic radio supernova remnants (SNRs), G337.2-0.7 and G309.2-0.6. Both remnants exhibit line-rich thermal spectra that require highly...
ASCA Observations of the Twin Supernova Remnants in the Large Magellanic Cloud, DEM L316 (2000)
Nishiuchi, Mamiko, Yokogawa, Jun, Koyama, Katsuji, Hughes, John P.
We report results from an ASCA X-ray study of DEM L316, an emission nebula in the Large Magellanic Cloud (LMC) consisting of two closely-spaced supernova remnants (SNRs). The SIS image shows separate...
Hughes, John P., Rakowski, Cara E., Decourchelle, Anne
In this Letter we use the unprecedented spatial resolution of the Chandra X-ray Observatory to carry out, for the first time, a measurement of the post-shock electron temperature and proper motion of...
Discovery of X-ray Emission from G328.4+0.2, a Crab-Like Supernova Remnant (2000)
Hughes, John P., Slane, Patrick O., Plucinsky, Paul P.
G328.4+0.2 is a moderately small (5 arcmin x 5arcmin) Galactic radio supernova remnant (SNR) at a distance of at least 17 kpc that has been long suggested to be Crab-like. Here we report on the...
A Merger Scenario for the Dynamics of Abell 665 (2000)
Gomez, Percy L., Hughes, John P., Birkinshaw, Mark
We present new redshift measurements for 55 galaxies in the vicinity of the rich galaxy cluster Abell 665. When combined with results from the literature, we have good velocity measurements for a...
Chandra Observations of the Crab-like Supernova Remnant G21.5-0.9 (2000)
Slane, Patrick, Chen, Yang, Schulz, Norbert S., Seward, Frederick, Hughes, John P., Gaensler, Bryan M.
Chandra observations of the Crab-like supernova remnant G21.5-0.9 reveal a compact central core and spectral variations indicative of synchrotron burn-off of higher energy electrons in the inner...
The X-ray Line Emission from the Supernova Remnant W49B (1999)
Hwang, Una, Petre, Robert, Hughes, John P.
The Galactic supernova remnant W49B has one of the most impressive X-ray emission line spectra obtained with the Advanced Satellite for Cosmology and Astronomy (ASCA). We use both plasma line...
Nucleosynthesis and Mixing in Cassiopeia A (1999)
Hughes, John P., Rakowski, Cara E., Burrows, David N., Slane, Patrick O.
We present results from the first light observations of the Cassiopeia A (Cas A) supernova remnant (SNR) by the Chandra X-ray Observatory. The X-ray spectrum varies on all spatial scales down to the...
The Extraordinarily Rapid Expansion of the X-ray Remnant of Kepler's Supernova (SN1604) (1999)
Four individual high resolution X-ray images from ROSAT and the Einstein Observatory have been used to measure the expansion rate of the remnant of Kepler's supernova (SN 1604). Highly significant...
X-Ray Emission From the Shell-Type SNR G347.3-0.5 (1999)
Slane, Patrick, Gaensler, Bryan M., Dame, Thomas M., Hughes, John P., Plucinsky, Paul P., Green, Anne
Recent ASCA observations of G347.3-0.5, an SNR discovered in the ROSAT All-Sky Survey, reveal nonthermal emission from a region along the northwestern shell (Koyama et al. 1997). Here we report on...
The Second Most Distant Cluster of Galaxies in the EMSS (1999)
Donahue, Megan, Voit, G. Mark, Scharf, Caleb A., Gioia, Isabella M., Mullis, Christopher R., Hughes, John P., ...
We report on our ASCA, Keck, and ROSAT observations of MS1137.5+6625, the second most distant cluster of galaxies in the Einstein Extended Medium Sensitivity Survey (EMSS), at redshift 0.78. We now...
Harold Wyndham : a study in education and administration (1999)
Hughes, John P. (John Patrick)
Bibliography: leaves 243-263.
ASCA X-Ray Spectroscopy of LMC Supernova Remnants and the Metal Abundances of the LMC (1998)
Hughes, John P., Hayashi, Ichizo, Koyama, Katsuji
We present the results of X-ray spectroscopy of a flux-limited sample of seven middle-aged supernova remnants (SNRs) in the Large Magellanic Cloud (LMC) (N23, N49, N63A, DEM71, N132D, 0453-68.5, and...
Study of the Composite Supernova Remnant MSH 11-62 (1998)
Harrus, Ilana. M., Hughes, John. P., Slane, Patrick O.
We present the analysis of the X-ray data collected during an observation of the supernova remnant (SNR) MSH 11-62 by the Advanced Satellite for Cosmology and Astrophysics (ASCA). We show that MSH...
Hughes, John P., Birkinshaw, Mark
A value of the Hubble constant has been determined from a comparison of the X-ray properties and Sunyaev-Zel'dovich effect of the distant rich cluster of galaxies CL0016+16. The cluster, as imaged by...
The X-ray Iron Emission from Tycho's Supernova Remnant (1997)
Hwang, Una, Hughes, John P., Petre, Robert
We present the results of broadband fits to the X-ray spectrum of Tycho's supernova remnant obtained by the Solid-State Imaging Spectrometers on the ASCA Observatory. We use single-temperature,...
ICM masses in nearby and distant clusters of galaxies (1997)
Tsuru, Takeshi Go, Matsumoto, Hironobu, Koyama, Katsuji, Tomida, Hiroshi, Fukazawa, Yashushi, Hattori, Makoto, ...
We compile X-ray data of clusters of galaxies at a wide range of redshift $z=0.0\sim1.0$ and compare X-ray luminosities, gas masses, iron abundances and iron masses of nearby clusters and those of...
Another X-ray-Discovered Poor Cluster of Galaxies Associated with CL 0016+16 (1997)
Hughes, John P., Birkinshaw, Mark
We report optical spectroscopic observations of RX J0018.8+1602, a ROSAT X-ray source proposed to be an intermediate redshift cluster of galaxies. Our observations confirm the identification of RX...
Hot Electrons and Cold Photons: Galaxy Clusters and the Sunyaev-Zel'dovich Effect (1997)
The hot gas in clusters of galaxies emits thermal bremsstrahlung emission that can be probed directly through measurements in the X-ray band with satellites like ROSAT and ASCA. Another probe of this...
Revisiting the Mass of the Coma Cluster from X-Ray Observations (1997)
I re-examine mass estimates of the Coma cluster from pre-ASCA X-ray spectral observations. A large range of model dark matter distributions are examined, under the assumptions of hydrostatic...
A Very Hot, High Redshift Cluster of Galaxies: More Trouble for Omega_0 = 1 (1997)
Donahue, Megan, Voit, G. Mark, Gioia, Isabella M., Luppino, Gerry, Hughes, John P., Stocke, John T.
We have observed the most distant (z=0.829) cluster of galaxies in the Einstein Extended Medium Sensitivity Survey, with the ASCA and ROSAT satellites. We find an X-ray temperature of 12.3 +3.1/-2.2...
Interpretation of the Center-Filled Emission from the Supernova Remnant W44 (1997)
Harrus, Ilana M., Hughes, John P., Singh, K. P., Koyama, K., Asaoka, I.
(Abridged) We have investigated two evolutionary scenarios advanced to explain the centrally-brightened X-ray morphology of the supernova remnant (SNR) W44: (1) a model involving the slow thermal...
Supernova Remnants Associated with Molecular Clouds in the Large Magellanic Cloud (1996)
Banas, Kenneth R., Hughes, John P., Bronfman, L.
We used the Swedish-ESO Submillimeter Telescope (SEST) to search for CO emission associated with three supernova remnants (SNRs) in the Large Magellanic Cloud: N49, N132D, and N23. Observations were...
Harrus, Ilana M., Hughes, John P., Helfand, David J.
We report the detection using ASCA data of a hard X-ray source in the vicinity of the radio pulsar PSR B1853+01 which is located within the supernova remnant (SNR) W44. PSR B1853+01, a 267ms pulsar,...
This thesis is not available electronically or by photocopy. Please contact Archives and Special Collections at archives@amherst.edu for more information.
White III, Raymond E., Day, C. S. R., Hatsukade, Isamu, Hughes, John P.
We analyze the Ginga LAC and Einstein SSS spectra of four cooling flow clusters, A496, A1795, A2142 and A2199, each of which shows firm evidence of a relatively cool component. The inclusion of such...
Self-consistent models for the x-ray emission from supernova remnants / (1984)
Thesis (Ph. D.)--Columbia University, 1984.
The antigenic analysis of Saccharomyces. (1955)
Thesis (M.S.)--Southern Illinois University, Dept. of Microbiology.
Spine title: The Aran dialect of modern Irish.