Galaxy cluster searches by photometric redshifts in the CFHTLS (2009)
Adami, C., Durret, F., Benoist, C., Coupon, J., Mazure, A., Meneux, B., ...
In order to enlarge publicly available optical cluster catalogs, in particular at high redshift, we have performed a systematic search for clusters of galaxies in the CFHTLS. We used the Le Phare...
Low Surface Brightness Galaxies in the Core of the Coma Cluster (2009)
M. P. Ulmer, G. M. Bernstein, D. R. Martin, R. C. Nichol, J. L. Pendleton, J. A. Tyson
We present the results of a search for low surface brightness galaxies (hereafter LSBs) in the Coma cluster. Bernstein et al. report on deep CCD observations in R of a 7: 0 5 7: 0 5 region in the...
Ulmer, M. P., Adami, C., Lima Neto, G. B., Durret, F., Covone, G., Ilbert, O., ...
Context. The cosmic time around the z ~ 1 redshift range appears crucial in the cluster and galaxy evolution, since it is probably the epoch of the first mature galaxy clusters. Our knowledge of the...
Ulmer, M. P., Adami, C., Neto, G. B. Lima, Durret, F., Covone, G., Ilbert, O., ...
The cosmic time around the z~1 redshift range appears crucial in the cluster and galaxy evolution, since it is probably the epoch of the first mature galaxy clusters. Our knowledge of the properties...
Very deep spectroscopy of the Coma cluster line of sight: exploring new territories (2009)
Adami, C., Brun, V. Le, Biviano, A., Durret, F., Lamareille, F., Pello, R., ...
Environmental effects have an important influence on cluster galaxies, but studies at very faint magnitudes (R>21) are almost exclusively based on imaging. We present here a very deep spectroscopic...
Using archival Chandra and XMM-Newton data on 35 galaxy clusters, we measured average temperature and metallicity profiles for clusters based separated by temperature, cooling time, and redshift. Our...
On the nature of faint Low Surface Brightness galaxies in the Coma cluster (2008)
Adami, C., Pello, R., Ulmer, M. P., Cuillandre, J. C., Durret, F., Mazure, A., ...
This project is the continuation of our study of faint Low Surface Brightness Galaxies (fLSBs) in one of the densest nearby galaxy regions known, the Coma cluster. Our goal is to improve our...
Orientations of very faint galaxies in the Coma cluster (2008)
Adami, C., Gavazzi, R., Cuillandre, J. C., Durret, F., Ilbert, O., Mazure, A., ...
We have then searched for preferential orientations of faint galaxies in the Coma cluster (down I_Vega~-11.5). By applying a deconvolution method to deep u* and I band images of the Coma cluster, we...
Photometric redshifts as a tool to study the Coma cluster galaxy populations (2008)
Adami, C., Ilbert, O., Pello, R., Cuillandre, J. C., Durret, F., Mazure, A., ...
We investigate the Coma cluster galaxy luminosity function (GLF) at faint magnitudes, in particular in the u* band by applying photometric redshift techniques applied to deep u*, B, V, R, I images...
Osse Observations Of Galactic Sources During Phase 1 (2008)
J. D. Kurfess, W. N. Johnson, R. L. Kinzer, R.A. Kroeger, M. S. Strickman, J.E. Grove, ...
The Oriented Scintillation Spectrometer Experiment (OSSE) on the COMPTON Gamma Ray Observatory has undertaken comprehensive observations of astrophysical sources during the eighteen-month Phase 1 of...
OSSE Observations of Blazars (2008)
Mcnaron-Brown Johnson, W. N. Johnson, G. V. Jung, R. L. Kinzer, J. D. Kurfess, M. S. Strickman, ...
Results are reported on observations obtained with the Oriented Scintillation Spectrometer Experiment (OSSE) instrument on the Compton Gamma Ray Observatory (CGRO) of 17 active galactic nuclei known...
An Osse Search For The Binary Radio Pulsar 1259-63 (2008)
Ray Grove, P. S. Ray, J. E. Grove, J. D. Kurfess, T. A. Prince, M. P. Ulmer
We have searched data from the Oriented Scintillation Spectrometer Experiment (OSSE) on the Compton Gamma Ray Observatory (GRO) for evidence of low-energy fl-ray emission from the binary radio pulsar...
Michael Maisack, W. N. Johnson, R. L. Kinzer, M. S. Strickman, J. D. Kurfess, G. V. Jung, ...
We report results of a two-week observation of NGC 4151 with the OSSE instrument. The source had a very soft spectrum which falls off exponentially with an e-folding energy of 39.2\Sigma1:5 keV in...
The Distribution of Galactic 511 keV Positron Annihilation Radiation (2007)
W. R. Purcell, D. A. Grabelsky, M. P. Ulmer, W. N. Johnson, R. L. Kinzer, J. D. Kurfess, ...
The Oriented Scintillation Spectrometer Experiment (OSSE) on NASA's Compton Gamma-Ray Observatory has completed numerous observations of the Galactic plane and Galactic center region. A...
OSSE OBSERVATIONS OF THE CRAB PULSAR (2007)
M. P. Ulmer, S. Lomatch, S. M. Matz, D. A. Grabelsky, W. R. Purcell, J. E. Grove, ...
We present results of the Compton Gamma Ray Observatory OSSE observations of the Crab pulsar, made during MJD 48373--48406 (27 April
OSSE SPECTRAL OBSERVATIONS OF GX 339-4 AND CYG X-1 (2007)
D. A. Grabelsky, S. M. Matz, W. R. Purcell, M. P. Ulmer, J. E. Grove, R. A. Cameron, ...
The Oriented Scintillation Spectrometer Experiment on the Compton Gamma Ray Observatory has carried out spectral and timing observations of Galactic black-hole candidates GX 339-4 and Cyg X-1. GX...
W. R. Purcell, D. A. Grabelsky, W. N. Johnson, G. V. Jung, R. L. Kinzer, J. D. Kurfess, ...
The Oriented Scintillation Spectrometer Experiment (OSSE) on the Compton Gamma-Ray Observatory has performed several observations of the Galactic plane and Galactic center region to measure the...
To appear in The Astrophysical Journal Letters (2007)
W. R. Purcell, D. A. Grabelsky, M. P. Ulmer, W. N. Johnson, R. L. Kinzer, J. D. Kurfess, ...
The Oriented Scintillation Spectrometer Experiment (OSSE) on the Compton Gamma-Ray Observatory (GRO) has performed numerous observations of the galactic plane and galactic center region to measure...
OSSE Preprint No. 6 The Oriented Scintillation Spectrometer Experiment Instrument Description (2007)
To Appear In, W. N. Johnson, R. L. Kinzer, J. D. Kurfess, M. S. Strickman, W. R. Purcell, ...
The Oriented Scintillation Spectrometer Experiment (OSSE) on the Arthur Holly Compton GammaRay Observatory satellite uses four actively-shielded NaI(Tl)-CsI(Na) phoswich detectors to provide...
Milli-Second Pulsars And Gamma-Ray Emission (2007)
M.P. Ulmer, M. P. Ulmer, P. C. Schroeder, P. C. Schroeder
This is a summary of observations of pulsars made with the Compton Gamma-Ray Observatory (CGRO) with emphasis given to milli-second pulsars. We present upper limits from the CGRO Oriented...
OSSE Observations of the Vela and Geminga Pulsars (2007)
Strickman Grove, J. E. Grove, W. N. Johnson, R. L. Kinzer, R. A. Kroeger, J. D. Kurfess, ...
The Oriented Scintillation Spectrometer Experiment (OSSE) on board the Compton Gamma Ray Observatory detected the Vela Pulsar (PSR B0833-45) during August-September 1991, April-May 1992, and August...
Hard X-Ray Variability Of Cygnus X--3 (2007)
Matz Grabelsky, S. M. Matz, D. A. Grabelsky, W. R. Purcell, M. P. Ulmer, W. N. Johnson, ...
The OSSE instrument on the Compton Gamma-Ray Observatory (GRO) made 4 observations of Cygnus X\Gamma3 between May 1991 and December 1992. OSSE observed a substantial change in the average hard X-ray...
SEARCH FOR FAST GALACTIC GAMMA RAY PULSARS P. Hertz (2007)
Grove Kurfess, J. E. Grove, J. D. Kurfess, W. N. Johnson, M. S. Strickman, S. Matz, ...
We have undertaken a program to search for fast gamma ray pulsars (P ! 1 s) in OSSE observations of the galactic center, galactic plane, LMC, and selected sources. We have used search strategies...
OSSE Observations of X-Ray Pulsars (2007)
Grove Kurfess, J. E. Grove, M. S. Strickman, M. P. Ulmer
We report on OSSE observations of the Be binary pulsars A0535+26, GRO J1008--57, and 4U 0115+63 at energies above 50 keV. The spectra are generally thermal, with exponential folding energies of...
OSSE Observations of GX (2007)
Gamma Grabelsky, D. A. Grabelsky, S. M. Matz, W. R. Purcell, M. P. Ulmer, J. E. Grove, ...
The Oriented Scintillation Spectrometer Experiment on the Compton Gamma Ray Observatory observed the Galactic black hole candidate GX 339\Gamma4 as a target of opportunity in 1991 September, in...
The Pulsed Hard X-Ray Spectrum of PSR B1509-58 (2007)
S. M. Matz, M. P. Ulmer, D. A. Grabelsky, W. R. Purcell, J. E. Grove, W. N. Johnson, ...
OSSE observed the 150 ms X-ray pulsar PSR B1509\Gamma58 in the supernova remnant MSH 15\Gamma52 for four weeks in 1992. The pulsed spectrum from 50 keV to 5 MeV is well-fit by a single power law...
Timing Noise Properties of GRO J0422+32 (2007)
Grove Johnson, W. N. Johnson, R. L. Kinzer, R. A. Kroeger, J. D. Kurfess, M. S. Strickman, ...
OSSE observed the hard X-ray transient source GRO J0422+32 (XN Per 92) between 11 Aug and 17 Sep 1992. High time resolution data were obtained over several energy bands in the ΒΈ35-600 keV range with...
An Osse Search For The Binary Radio Pulsar 1259-63 (2007)
Ray Grove, P. S. Ray, J. E. Grove, J. D. Kurfess, T. A. Prince, M. P. Ulmer
We have searched data from the Oriented Scintillation Spectrometer Experiment (OSSE) on the Compton Gamma Ray Observatory (GRO) for evidence of low-energy fl-ray emission from the binary radio pulsar...
OSSE Observations of Blazars (2007)
K. McNaron-Brown, J.E. Grove, W.N. Johnson, R.L. Kinzer, R.A. Kroeger, J. D. Kurfess, ...
The Oriented Scintillation Spectrometer Experiment (OSSE) on the Compton Gamma Ray Observatory has observed four of the active galactic nuclei detected by EGRET (Fichtel et al. 1993) at photon...
OSSE OBSERVATIONS OF THE GALACTIC CENTER REGION- EMISSION FROM DISCRETE SOURCES (2007)
G. V. Jung, J. D. Kurfess, W. N. Johnson, M. S. Strickman, R. L. Kinzer, W. R. Purcell, ...
We present preliminary results on the X-ray emission of discrete sources in the Galactic Center region from OSSE observations made between July, 1991 and September, 1992. These observations were...
Accepted for publication in the Astrophysical Journal (2007)
Osse Observations, W. N. Johnson, C. D. Dermer, R. L. Kinzer, J. D. Kurfess, M. S. Strickman, ...
We report results of multiple observations of the quasar 3C 273 with the Oriented Scintillation Spectrometer Experiment (OSSE) instrument on the Compton Gamma Ray Observatory. These observations span...
W.N. Johnson, J.E. Grove, R.L. Kinzer, R.A. Kroeger, J.D. Kurfess, and M.S. Strickman (2007)
Hulburt Center, W. N. Johnson, J. E. Grove, R. L. Kinzer, R. A. Kroeger, J. D. Kurfess, ...
In its first two years of operation, the Oriented Scintillation Spectrometer Experiment (OSSE) on the Compton Gamma Ray Observatory (CGRO) observed 26 active galaxies classified as Seyferts. These...
OSSE Upper Limits to Pulsar Gamma-Ray Emission (2007)
Schroeder Ulmer, P. C. Schroeder, M. P. Ulmer, S. M. Matz, D. A. Grabelsky, W. R. Purcell, ...
We present upper limits from CGRO Oriented Scintillation Spectrometer Experiment (OSSE) observations of pulsars and a summary of pulsar observations made with the Compton Gamma-Ray Observatory...
OSSE Observations of Starburst Galaxy M82 (2007)
Lih-sin The, Donald D. Clayton, Mark D. Leising, J. D. Kurfess, W. N. Johnson, R. L. Kinzer, ...
OSSE observed the starburst galaxy M82 in two viewing periods of 8 and 14 days. M82's priority as a target had been established on the grounds that the average supernova rate may be very high...
M. D. Leising, D. D. Clayton, W. N. Johnson, J. D. Kurfess, ...
A primary objective of the Compton Observatory is the direct study of explosive nucleosynthesis in supernovae and classical novae. We have been fortunate in that three rare events have coincided,...
M. P. Ulmer, G. M. Bernstein, D. R. Martin, R. C. Nichol, J. L. Pendleton, J. A. Tyson
We present the results of a search for low surface brightness galaxies (hereafter LSBs) in the Coma cluster. Bernstein et al. report on deep CCD observations in R of a 7: 0
G. M. Bernstein, R. C. Nichol, J. A. Tyson, M. P. Ulmer, D. Wittman
We determine the luminosity function (LF) of galaxies in the core of the Coma cluster for MR \Gamma11:4 (assuming H 0 = 75 km s \Gamma1
OSSE Observations of NGC 4151 (2007)
M. Maisack, W. N. Johnson, R. L. Kinzer, M. S. Strickman, J. D. Kurfess, R. A. Cameron, ...
We report results of a two-week observation of the Seyfert galaxy NGC 4151 with the Oriented Scintillation Spectrometer Experiment (OSSE) instrument on the Compton Gamma Ray Observatory (GRO). The...
AN OSSE SEARCH FOR THE BINARY RADIO PULSAR 1259-63 (2007)
P. S. Ray, J. E. Grove, J. D. Kurfess, T. A. Prince, M. P. Ulmer
We have searched data from the Oriented Scintillation Spectrometer Experiment (OSSE) on the Compton Gamma Ray Observatory (GRO) for evidence of low-energy-ray emission from the binary radio pulsar...
Initial Results from OSSE on the Compton Observatory (2007)
W. N. Johnson, J. D. Kurfess, M. S. Strickman, R. J. Murphy, R. L. Kinzer, G. H. Share, ...
The Oriented Scintillation Spectrometer Experiment (OSSE) was launched on NASA's Compton Observatory on 1991 April 5. OSSE uses large area scintillation detectors to undertake gamma-ray line and...
An extension of the SHARC survey (2007)
Adami, C., Ulmer, M. P., Durret, F., Covone, G., Cypriano, E.
We report on our search for distant clusters of galaxies based on optical and X-ray follow up observations of X-ray candidates from the SHARC survey. Based on the assumption that the absence of...
Adami, C., Scheidegger, R., Ulmer, M. P., Durret, F., Mazure, A., West, M. J., ...
We report on a search for faint (R total magnitude fainter than 21) and low surface brightness galaxies (R central surface brightness fainter than ~24) (fLSBs) in a 0.72x0.82 deg2 area centered on...
Adami, C., Scheidegger, R., Ulmer, M. P., Durret, F., Mazure, A., West, M. J., ...
We report on a search for faint (R total magnitude fainter than 21) and low surface brightness galaxies (R central surface brightness fainter than ~24) (fLSBs) in a 0.72x0.82 deg2 area centered on...
Cl 1205+44, a fossil group at z = 0.59 (2005)
Ulmer, M. P., Adami, C., Covone, G., Durret, F., Neto, G. B. Lima, Sabirli, K., ...
This is a report of Chandra, XMM-Newton, HST and ARC observations of an extended X-ray source at z = 0.59. The apparent member galaxies range from spiral to elliptical and are all relatively red...
Large scale diffuse light in the Coma cluster: a multi-scale approach (2005)
Adami, C., Slezak, E., Durret, F., Conselice, C. J., Cuillandre, J. C., Gallagher, J. S., ...
We have obtained wide field images of the Coma cluster in the B, V, R and I bands with the CFH12K camera at CFHT. In order to search for large scale diffuse emission, we have applied to these images...
Adami, C., Ulmer, M. P., Romer, A. K., Nichol, R. C., Holden, B. P., Pildis, R. A.
We present the results of a set of simulations designed to quantify the selection function of the Bright SHARC survey for distant clusters. The statistical significance of the simulations relied on...
Central Matter Distributions in Rich Clusters of Galaxies from z~0 to z~0.5 (2005)
Adami, C., Mazure, A., Ulmer, M. P., Savine, C.
We have analyzed the galaxy number density and luminosity density profiles of rich clusters of galaxies from redshifts z=0 to z=0.5. We show that the luminosity profile computed with bright galaxies...
Dynamical and content evolution of a sample of clusters from z~0 to z~0.5 (2005)
Adami, C., Holden, B. P., Castander, F. J., Mazure, A., Nichol, R. C., Ulmer, M. P.
In this paper, we present an analysis of the dynamics and segregation of galaxies in rich clusters from z~0.32 to z~0.48 taken from the CFHT Optical PDCS (COP) survey and from the CNOC survey...
The CFH Optical PDCS survey (COP) I: The Data (2005)
Adami, C., Holden, B., Castander, F. J., Nichol, R. C., Mazure, A., Ulmer, M. P., ...
This paper presents and gives the COP (COP: CFHT Optical PDCS; CFHT: Canada-France-Hawaii Telescope; PDCS: Palomar Distant Cluster Survey) survey data. We describe our photometric and spectroscopic...
A Turn-over in the Galaxy Luminosity Function of the Coma Cluster Core? (2005)
Adami, C., Ulmer, M. P., Durret, F., Nichol, R. C., Mazure, A., Holden, B. P., ...
Our previous study of the faint end (R$\\leq$21.5) of the galaxy luminosity function (GLF) was based on spectroscopic data in a small region near the Coma cluster center. In this previous study Adami...
Cl 1205+44, a fossil group at z = 0.59 (2005)
Ulmer, M. P., Adami, C., Covone, G., Durret, F., Neto, G. B. Lima, Sabirli, K., ...
This is a report of Chandra, XMM-Newton, HST and ARC observations of an extended X-ray source at z = 0.59. The apparent member galaxies range from spiral to elliptical and are all relatively red...
Cl 1205+44, a fossil group at z = 0.59 (2005)
Ulmer, M. P., Adami, C., Covone, G., Durret, F., Neto, G. B. Lima, Sabirli, K., ...
This is a report of Chandra, XMM-Newton, HST and ARC observations of an extended X-ray source at z = 0.59. The apparent member galaxies range from spiral to elliptical and are all relatively red...
Large scale diffuse light in the Coma cluster: A multi-scale approach (2005)
Adami, C., Mazure, A., Tresse, L., Slezak, E., Durret, F., Conselice, C. J., ...
We have obtained wide field images of the Coma cluster in the B, V, R and I bands with the CFH12K camera at CFHT. To search for large scale diffuse emission, we have applied to these images an...
Cl 1205+44, a fossil group at z = 0.59 (2005)
Ulmer, M. P., Adami, C., Covone, G., Durret, F., Neto, G. B. Lima, Sabirli, K., ...
This is a report of Chandra, XMM-Newton, HST and ARC observations of an extended X-ray source at z = 0.59. The apparent member galaxies range from spiral to elliptical and are all relatively red...
Optical investigation of electronic states of Mn4+ ions in p-type GaN (2004)
Han, B., Wessels, B. W., Ulmer, M. P.
The electronic states of manganese in p-type GaN are investigated using photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies. A series of sharp PL lines at 1.0 eV is observed...
Large scale diffuse light in the Coma cluster: a multi-scale approach (2004)
Adami, C., Slezak, E., Durret, F., Conselice, C. J., Cuillandre, J. C., Gallagher, J. S., ...
We have obtained wide field images of the Coma cluster in the B, V, R and I bands with the CFH12K camera at CFHT. In order to search for large scale diffuse emission, we have applied to these images...
Electronic states of Mn4+ ions in p-type GaN (2004)
Han, B., Wessels, B. W., Ulmer, M. P.
The electronic states of manganese in p-type GaN are investigated using photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies. A series of sharp PL lines at 1.0 eV is observed...
Optical properties of Mn4+ ions in GaN:Mn codoped with Mg acceptors (2004)
Han, B., Korotkov, R. Y., Wessels, B. W., Ulmer, M. P.
The optical properties of Mn-Mg codoped epitaxial GaN were studied. Addition of Mg acceptors quenches the weak manganese-related photoluminescence (PL) band at 1.3 eV in GaN:Mn and a series of sharp...
Large scale diffuse light in the Coma cluster: a multi-scale approach (2004)
Adami, C., Slezak, E., Durret, F., Conselice, C. J., Cuillandre, J. C., Gallagher, J. S., ...
We have obtained wide field images of the Coma cluster in the B, V, R and I bands with the CFH12K camera at CFHT. In order to search for large scale diffuse emission, we have applied to these images...
Large scale diffuse light in the Coma cluster: a multi-scale approach (2004)
Adami, C., Slezak, E., Durret, F., Conselice, C. J., Cuillandre, J. C., Gallagher, J. S., ...
We have obtained wide field images of the Coma cluster in the B, V, R and I bands with the CFH12K camera at CFHT. In order to search for large scale diffuse emission, we have applied to these images...
Chandra observations of the Guitar Nebula (2003)
Wong, D. S., Cordes, J. M., Chatterjee, S., Zweibel, E. G., Finley, J. P., Romani, R. W., ...
As part of a multi-wavelength study, we report on a 50 ks Chandra/ACIS observation of the Guitar Nebula, a bow shock nebula associated with the radio pulsar B2224+65. We see a "hot spot" at the tip...
Central Matter Distributions in Rich Clusters of Galaxies from z~0 to z~0.5 (2001)
Adami, C., Mazure, A., Ulmer, M. P., Savine, C.
We have analyzed the galaxy number density and luminosity density profiles of rich clusters of galaxies from redshifts z=0 to z=0.5. We show that the luminosity profile computed with bright galaxies...
Central Matter Distributions in Rich Clusters of Galaxies from z~0 to z~0.5 (2001)
Adami, C., Mazure, A., Ulmer, M. P., Savine, C.
We have analyzed the galaxy number density and luminosity density profiles of rich clusters of galaxies from redshifts z=0 to z=0.5. We show that the luminosity profile computed with bright galaxies...
Central Matter Distributions in Rich Clusters of Galaxies from z~0 to z~0.5 (2001)
Adami, C., Mazure, A., Ulmer, M. P., Savine, C.
We have analyzed the galaxy number density and luminosity density profiles of rich clusters of galaxies from redshifts z=0 to z=0.5. We show that the luminosity profile computed with bright galaxies...
Dynamical and content evolution of a sample of clusters from z~0 to z~0.5 (2000)
Adami, C., Holden, B. P., Castander, F. J., Mazure, A., Nichol, R. C., Ulmer, M. P.
In this paper, we present an analysis of the dynamics and segregation of galaxies in rich clusters from z~0.32 to z~0.48 taken from the CFHT Optical PDCS (COP) survey and from the CNOC survey...
Adami, C., Ulmer, M. P., Romer, A. K., Nichol, R. C., Holden, B. P., Pildis, R. A.
We present the results of a set of simulations designed to quantify the selection function of the Bright SHARC survey for distant clusters. The statistical significance of the simulations relied on...
CFHT Optical PDCS Survey II: Evolution in the Space Density of Clusters of Galaxies (2000)
Holden, B. P., Adami, C., Nichol, R. C., Castander, F. J., Lubin, L. M., Romer, A. K., ...
We present the first dynamical study of the optically selected Palomar Distant Cluster Survey (PDCS). We show that eleven out of twelve PDCS clusters we observed are real over-densities of galaxies....
The CFH Optical PDCS survey (COP) I: The Data (2000)
Adami, C., Holden, B., Castander, F. J., Nichol, R. C., Mazure, A., Ulmer, M. P., ...
This paper presents and gives the COP (COP: CFHT Optical PDCS; CFHT: Canada-France-Hawaii Telescope; PDCS: Palomar Distant Cluster Survey) survey data. We describe our photometric and spectroscopic...
Adami, C., Ulmer, M. P., Romer, A. K., Nichol, R. C., Holden, B. P., Pildis, R. A.
We present the results of a set of simulations designed to quantify the selection function of the Bright SHARC survey for distant clusters. The statistical significance of the simulations relied on...
Dynamical and content evolution of a sample of clusters from z~0 to z~0.5 (2000)
Adami, C., Holden, B. P., Castander, F. J., Mazure, A., Nichol, R. C., Ulmer, M. P.
In this paper, we present an analysis of the dynamics and segregation of galaxies in rich clusters from z~0.32 to z~0.48 taken from the CFHT Optical PDCS (COP) survey and from the CNOC survey...
The CFH Optical PDCS survey (COP) I: The Data (2000)
Adami, C., Holden, B., Castander, F. J., Nichol, R. C., Mazure, A., Ulmer, M. P., ...
This paper presents and gives the COP (COP: CFHT Optical PDCS; CFHT: Canada-France-Hawaii Telescope; PDCS: Palomar Distant Cluster Survey) survey data. We describe our photometric and spectroscopic...
Adami, C., Ulmer, M. P., Romer, A. K., Nichol, R. C., Holden, B. P., Pildis, R. A.
We present the results of a set of simulations designed to quantify the selection function of the Bright SHARC survey for distant clusters. The statistical significance of the simulations relied on...
Dynamical and content evolution of a sample of clusters from z~0 to z~0.5 (2000)
Adami, C., Holden, B. P., Castander, F. J., Mazure, A., Nichol, R. C., Ulmer, M. P.
In this paper, we present an analysis of the dynamics and segregation of galaxies in rich clusters from z~0.32 to z~0.48 taken from the CFHT Optical PDCS (COP) survey and from the CNOC survey...
The CFH Optical PDCS survey (COP) I: The Data (2000)
Adami, C., Holden, B., Castander, F. J., Nichol, R. C., Mazure, A., Ulmer, M. P., ...
This paper presents and gives the COP (COP: CFHT Optical PDCS; CFHT: Canada-France-Hawaii Telescope; PDCS: Palomar Distant Cluster Survey) survey data. We describe our photometric and spectroscopic...
The Butcher-Oemler Effect at Moderate Redshift (1999)
Metevier, Anne J., Romer, A. Kathy, Ulmer, M. P.
We present the results of Butcher-Oemler-style analysis of three moderate- redshift (0.1
A Turn-over in the Galaxy Luminosity Function of the Coma Cluster Core? (1999)
Adami, C., Ulmer, M. P., Durret, F., Nichol, R. C., Mazure, A., Holden, B. P., ...
Our previous study of the faint end (R$\leq$21.5) of the galaxy luminosity function (GLF) was based on spectroscopic data in a small region near the Coma cluster center. In this previous study Adami...
Simulations Applied to the Bright SHARC XCLF: Results and Implications (1999)
Ulmer, M. P., Adami, C., Pildis, R., Romer, A. K., Nichol, R. C., Holden, B. P.
We have performed simulations of the effectiveness of the Serendipitous High-redshift Archival ROSAT Cluster (SHARC) survey for various model universes. We find, in agreement with work based on a...
Holden, B. P., Nichol, R. C., Romer, A. K., Metevier, A., Postman, M., Ulmer, M. P, ...
We have conducted a redshift survey of sixteen cluster candidates from the Palomar Distant Cluster Survey (PDCS) to determine both the density of PDCS clusters and the accuracy of the estimated...
The Bright SHARC Survey: The Cluster Catalog (1999)
Romer, A. K, Nichol, R. C., Holden, B. P., Ulmer, M. P., Pildis, R. A., Merrelli, A. J., ...
We present the Bright SHARC (Serendipitous High-Redshift Archival ROSAT Cluster) Survey, which is an objective search for serendipitously detected extended X-ray sources in 460 deep ROSAT PSPC...
The Bright SHARC Survey: The X-ray Cluster Luminosity Function (1999)
Nichol, R. C., Romer, A. K., Holden, B. P., Ulmer, M. P., Pildis, R. A., Adami, C., ...
We present here initial results on the X-ray Cluster Luminosity Function (XCLF) from the Bright SHARC sample of distant X-ray clusters of galaxies. This sample is 97% complete in its optical...
A Turn-over in the Galaxy Luminosity Function of the Coma Cluster Core? (1999)
Adami, C., Ulmer, M. P., Durret, F., Nichol, R. C., Mazure, A., Holden, B. P., ...
Our previous study of the faint end (R$\\leq$21.5) of the galaxy luminosity function (GLF) was based on spectroscopic data in a small region near the Coma cluster center. In this previous study Adami...
A Turn-over in the Galaxy Luminosity Function of the Coma Cluster Core? (1999)
Adami, C., Ulmer, M. P., Durret, F., Nichol, R. C., Mazure, A., Holden, B. P., ...
Our previous study of the faint end (R$\\leq$21.5) of the galaxy luminosity function (GLF) was based on spectroscopic data in a small region near the Coma cluster center. In this previous study Adami...
SMM Observations of Interstellar 26Al: A Status Report, (1998)
Purcell, W. R., Ulmer, M. P., Share, G. H., Kinzer, R. L.
The discovery of radioactive Al 26 in the interstellar medium has provided direct evidence for the recent nucleosynthesis of intermediate-mass nuclei in the Galaxy. While modern nucleosynthesis...
High Quality Alpha-Si/Nb and Alpha-SiN/NbN Artificial Multilayers for Josephson Applications. (1998)
Chen, J., Rippert, E. D., Song, S. N., Ulmer, M. P., Ketterson, J. B.
A high resolution transmission electron microscopy study of multilayer films prepared by magnetron sputtering shows that the morphology of the growing interfaces in a-si/nb and a-sin/nbn multilayers...
Reichart, D. E., Nichol, R. C., Castander, F. J., Burke, D. J., Romer, A. K., Holden, B. P., ...
From the Press-Schechter mass function and the empirical X-ray cluster luminosity-temperature (L-T) relation, we construct an X-ray cluster luminosity function that can be applied to the growing...
X-ray Observations of Distant Optically Selected Cluster (1997)
Holden, B. P., Romer, A. K., Nichol, R. C., Ulmer, M. P.
We have measured fluxes or flux limits for 31 of the 79 cluster candidates in the Palomar Distant Cluster Survey (PDCS) using archival ROSAT/PSPC pointed observations. Our X-ray survey reaches a flux...
Skibo, J. G., Johnson, W. N., Kurfess, J. D., Kinzer, R. L., Jung, G., Grove, J. E., ...
We present the results of OSSE observations of the soft gamma ray continuum emission from the Galactic plane at longitude 95 degrees. Emission is detected between 50 and 600 keV where the spectrum is...
The SPARTAN 1 Collimated X-Ray Detector System. (1997)
Fritz, G. G., Fenimore, E. E., Ulmer, M. P., Cruddace, R. G., Serna, E.
This memorandum documents the design testing and flight performance of the finely collimated x-ray detector system flown on the SPARTAN 1 mission. The SPARTAN program, an outgrowth of a joint Naval...
No Evolution in the X-ray Cluster Luminosity Function out to z=0.7 (1997)
Romer, A. K., Nichol, R. C., Collins, C. A., Burke, D. J., Holden, B. H., Metevier, A., ...
In contrast to claims of strong negative evolution by other groups, we find no evidence for evolution of the X-ray cluster luminosity function out to z=0.7
D.J. Thompson, A.K. Harding, W. Hermsen, M.P. Ulmer
. The four instruments on the Compton Gamma Ray Observatory have identified at least seven isolated neutron stars by their pulsed gamma-ray emission. For all of these, the gamma radiation represents...
Evolution in the X-ray Cluster Luminosity Function Revisited (1996)
Nichol, R. C., Holden, B. P., Romer, A. K., Ulmer, M. P., Burke, D. J., Collins, C. A.
(Shortened Abstract) We present new X-ray data taken from the ROSAT PSPC pointing archive for 21 clusters in the Einstein Extended Medium Sensitivity Survey (EMSS). We have supplemented these data...
Low Surface Brightness Galaxies in the Core of the Coma Cluster (1996)
Ulmer, M. P., Bernstein, G. M., Martin, D. R., Nichol, R. C., Pendleton, J. L., Tyson, J. A.
We present the results of a search for low surface brightness galaxies (hereafter LSBs) in the Coma cluster. Bernstein et al. report on deep CCD observations in R of a 7.5 by 7.5 arcminute region in...
OSSE observations of Her X-1 during the Main-On state (1996)
M. Kunz, E. Kendziorra, P. Kretschmar, M. Maisack, R. Staubert, M. P. Ulmer
. The binary X-ray pulsar Her X--1 has been observed by CGRO-OSSE during its Main--On state in July 1994. The average pulse period is determined. Main--On pulse profiles in 30-60 keV for successive...
A search for distant X-ray galaxy clusters (1995)
Burke, D. J., Collins, C. A., Nichol, R. C., Romer, A. K., Holden, B., Sharples, R. M., ...
We report on the progress of our search for serendipitous distant X-ray galaxy clusters in the ROSAT PSPC pointed observations archive. The initial aim of our work is to measure the X-ray luminosity...
The Luminosity Function of the Coma Cluster Core for -25 (1995)
Bernstein, G. M., Nichol, R. C., Tyson, J. A., Ulmer, M. P., Wittman, D.
We determine the luminosity function (LF) of galaxies in the core of the Coma cluster for M_R
A search for distant X-ray galaxy clusters (1995)
Burke Collins, C. A. Collins, R. C. Nichol, A. K. Romer, B. Holden, R. M. Sharples, ...
. We report on the progress of our search for serendipitous distant X-ray galaxy clusters in the ROSAT PSPC pointed observations archive. The initial aim of our work is to measure the X-ray...
A Search for X-Ray Bright Distant Clusters of Galaxies (1994)
Nichol, R. C., Ulmer, M. P., Kron, R. G., Wirth, G. D., Koo, D. C.
We present the results of a search for X--ray luminous distant clusters of galaxies. We found extended X--ray emission characteristic of a cluster towards two of our candidate clusters of galaxies....
Gamma-Ray and Radio Observations of PSR B1509-58 (1993)
M. P. Ulmer, S. M. Matz, R. B. Wilson, M. J. Finger, K. S. Hagedon, ...
We report concurrent radio and gamma-ray observations of PSR B1509\Gamma58 carried out by the Parkes Radio Telescope and by the Burst And Transient Source Experiment (BATSE) and the Oriented...
M. S. Strickman, J. E. Grove, W. N. Johnson, R. L. Kinzer, R. A. Kroeger, J. D. Kurfess, ...
The OSSE detector on board the Compton Gamma Ray Observatory observed the Vela Pulsar (PSR 0833-45) during August-September 1991 and April-May 1992. Pulsed emission was detected at the 4-5oe level in...