Structural Parameters of the M87 Globular Clusters (2009)
Madrid, Juan P., Harris, William E., Blakeslee, John P., Gomez, Matias
We derive structural parameters for ~2000 globular clusters in the giant Virgo elliptical M87 using extremely deep Hubble Space Telescope images in F606W (V) and F814W (I) taken with the ACS/WFC. The...
Peng, Eric W., Jordan, Andres, Blakeslee, John P., Mieske, Steffen, Cote, Patrick, Ferrarese, Laura, ...
Metal-poor globular clusters (GCs) are our local link to the earliest epochs of star formation and galaxy building. Studies of extragalactic GC systems using deep, high-quality imaging have revealed...
The Star Cluster Population of the Spiral Galaxy NGC3370 (2009)
Cantiello, Michele, Brocato, Enzo, Blakeslee, John P.
Aims.We study the photometric and structural properties of the star cluster system in the late type Sc spiral NGC 3370. Methods. BVI observations from the Advanced Camera for Surveys on board of HST...
The Seventh Data Release of the Sloan Digital Sky Survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDSS-II. It includes...
Surface Brightness Fluctuations as Stellar Population Indicators (2009)
Surface Brightness Fluctuations (SBF) can provide useful information about the unresolved stellar content of early-type galaxies and spiral bulges. The absolute SBF magnitude Mbar in a given passband...
Lee, Hyun-chul, Worthey, Guy, Blakeslee, John P.
We investigate the effects of alpha-element enhancement and the thermally pulsing-asymptotic giant branch (TP-AGB) stars on the surface brightness fluctuation (SBF) magnitudes and broadband colors of...
Blakeslee, John P., Jordan, Andres, Mei, Simona, Cote, Patrick, Ferrarese, Laura, Infante, Leopoldo, ...
We present g-z color and z-band surface brightness fluctuations (SBF) measurements for 43 early-type galaxies in the Fornax cluster imaged with HST/ACS. These are combined with measurements for Virgo...
Mei, Simona, Holden, Bard P., Blakeslee, John P., Ford, Holland C., Franx, Marijn, Homeier, Nicole L., ...
The seventh data release of the sloan digital sky survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
Mei, Simona, Holden, Brad P., Blakeslee, John P., Ford, Holland C., Franx, Marijn, Homeier, Nicole L., ...
We apply detailed observations of the Color-Magnitude Relation (CMR) with the ACS/HST to study galaxy evolution in eight clusters at z~1. The early-type red sequence is well defined and elliptical...
Ultra-Compact Dwarf Candidates Near the Lensing Galaxy in Abell S0740 (2008)
Blakeslee, John P., DeGraaff, Regina Barber
We analyze three-band HST/ACS imaging data of the giant elliptical galaxy ESO325-G004. This is the nearest known strongly lensing galaxy, and it resides in the center of the poor cluster Abell S0740...
An Automatic Image Reduction Pipeline for the Advanced Camera for Surveys (2008)
John P. Blakeslee, Kenneth R. Anderson, G. R. Meurer, N. Benítez, D. Magee
Abstract. We have written an automatic image processing pipeline for the Advanced Camera for Surveys (ACS) Guaranteed Time Observation (GTO) program. The pipeline, known as Apsis, supports the...
Peng, Eric W., Jordan, Andres, Cote, Patrick, Takamiya, Marianne, West, Michael J., Blakeslee, John P., ...
The fraction of stellar mass contained in globular clusters (GCs), also measured by number as the specific frequency, is a fundamental quantity that reflects both a galaxy's early star formation and...
THE QUADRUPLE GRAVITATIONAL LENS PG 11151080: TIME DELAYS AND MODELS (2007)
Paul L. Schechter, Charles D. Bailyn, Robert Barr, Richard Barvainis, Christopher M. Becker, Gary M. Bernstein, ...
12 TODD HURT,
Paul L. Schechter, Charles D. Bailyn, Robert Barr, Richard Barvainis, Christopher M, John P. Blakeslee, ...
Robert A. Fesen 9, Phillipe Fischer
Low-Mass X-ray Binaries and Globular Clusters in Centaurus A (2007)
Jordan, Andres, Sivakoff, Gregory R., McLaughlin, Dean E., Blakeslee, John P., Evans, Daniel A., Kraft, Ralph P., ...
We present results of Hubble Space Telescope and Chandra X-ray Observatory observations of globular clusters (GCs) and low-mass X-ray binaries (LMXBs) in the central regions of Centaurus A. Out of...
Cote, Patrick, Ferrarese, Laura, Jordan, Andres, Blakeslee, John P., Chen, Chin-Wei, Infante, Leopoldo, ...
We analyse HST surface brightness profiles for 143 early-type galaxies in the Virgo and Fornax Clusters. Sersic models provide accurate descriptions of the global profiles with a notable exception:...
DeGraaff, Regina Barber, Blakeslee, John P., Meurer, Gerhardt R., Putman, Mary E.
We use two-band imaging data from the Advanced Camera for Surveys on board the Hubble Space Telescope for a detailed study of NGC1533, an SB0 galaxy in the Dorado group surrounded by a ring of HI....
Cantiello, Michele, Blakeslee, John P.
We perform a series of numerical experiments to study how the nonlinear metallicity--color relations predicted by different stellar population models affect the color distributions observed in...
Cantiello, Michele, Blakeslee, John P., Raimondo, Gabriella, Brocato, Enzo, Capaccioli, Massimo
We derive Surface Brightness Fluctuations (SBF) and integrated magnitudes in the V- and I-bands using Advanced Camera for Surveys (ACS) archival data. The sample includes 14 galaxies covering a wide...
Cantiello, Michele, Raimondo, Gabriella, Blakeslee, John P., Brocato, Enzo, Capaccioli, Massimo
Taking advantage of the exceptional capabilities of ACS on board of HST, we derive Surface Brightness Fluctuation (SBF) measurements in the B and I bands from images of six elliptical galaxies with...
The ACS Fornax Cluster Survey. I. Introduction to the Survey and Data Reduction Procedures (2007)
Jordan, Andres, Blakeslee, John P., Cote, Patrick, Ferrarese, Laura, Infante, Leopoldo, Mei, Simona, ...
The Fornax Cluster is a conspicuous cluster of galaxies in the southern hemisphere and the second largest collection of early-type galaxies within
A Keck Spectroscopic Survey of MS1054-03 (z=0.83): Forming the Red Sequence (2007)
Tran, Kim-Vy H., Franx, Marijn, Illingworth, Garth D., Van Dokkum, Pieter, Kelson, Daniel D., Blakeslee, John P., ...
Using a magnitude-limited, spectroscopic survey of the X-ray luminous galaxy cluster MS1054-03, we isolate 153 cluster galaxies and measure MS1054's redshift and velocity dispersion to be z=0.8307...
Lee, Hyun-chul, Worthey, Guy, Blakeslee, John P.
We present the effects due to alpha-element enhancement on surface brightness fluctuation magnitudes and broad-band colors in order to investigate the calibration zero-point. We study these effects...
Andrés Jordán, Gregory R. Sivakoff, Dean E. Mclaughlin, John P. Blakeslee, Daniel A. Evans, Ralph P. Kraft, ...
We present results of Hubble Space Telescope and Chandra X-Ray Observatory observations of globular clusters (GCs) and low-mass X-ray binaries (LMXBs) in the central regions of Centaurus A. Out of...
Ferrarese, Laura, Cote, Patrick, Blakeslee, John P., Mei, Simona, Merritt, David, West, Michael J.
Recent years have seen dramatic progress in the study of the core and nuclear properties of galaxies. The structure of the cores has been shown to vary methodically with global and nuclear...
Sivakoff, Gregory R., Jordán, Andrés, Sarazin, Craig L., Blakeslee, John P., E}, Patrick C{\^ O}t{\', Ferrarese, Laura, ...
(Abridged) Chandra and Hubble ACS observations of 11 early-type galaxies probe the low-mass X-ray binary (LMXB) - globular cluster (GC) connection. We explore the optical properties of 270 GCs with...
Trends in the Globular Cluster Luminosity Function of Early-Type Galaxies (2006)
Jordan, Andres, McLaughlin, Dean E., Cote, Patrick, Ferrarese, Laura, Peng, Eric W., Blakeslee, John P., ...
We present results from a study of the globular cluster luminosity function (GCLF) in a sample of 89 early-type galaxies observed as part of the ACS Virgo Cluster Survey. Using a Gaussian...
Mieske, Steffen, Jordan, Andres, Cote, Patrick, Kissler-Patig, Markus, Peng, Eric W., Ferrarese, Laura, ...
We examine the correlation between globular cluster (GC) color and magnitude using HST/ACS imaging for a sample of 79 early-type galaxies (-21.7
The Discovery of Cepheids and a Distance to NGC 5128 (2006)
Ferrarese, Laura, Mould, Jeremy R., Stetson, Peter B., Tonry, John L., Blakeslee, John P., Ajhar, Edward A.
We discuss a new distance to NGC 5128 (Centaurus A) based on Cepheid variables observed with the Hubble Space Telescope. Twelve F555W (V) and six F814W (I) epochs of cosmic-ray-split Wide Field...
Mei, Simona, Holden, Brad P., Blakeslee, John P., Rosati, Piero, Postman, Marc, Jee, Myungkook J., ...
Color-magnitude relations have been derived in the clusters RX J0849+4452 and RX J0848+4453 at z~1.26. The color-magnitude relation was determined from Advanced Camera for Surveys imaging in the WFC...
Ferrarese, Laura, Cote, Patrick, Bonta, Elena Dalla, Peng, Eric W., Merritt, David, Jordan, Andres, ...
Imaging surveys with the Hubble Space Telescope (HST) have shown that roughly 50-80% of low- and intermediate-luminosity galaxies contain a compact stellar nucleus at their center, regardless of host...
The ACS Virgo Cluster Survey. VIII. The Nuclei of Early-Type Galaxies (2006)
Cote, Patrick, Piatek, Slawomir, Ferrarese, Laura, Jordan, Andres, Merritt, David, Peng, Eric W., ...
(Abridged) The ACS Virgo Cluster Survey is an HST program to obtain high-resolution, g and z-band images for 100 early-type members of the Virgo Cluster, spanning a range of ~460 in blue luminosity....
The ACS Virgo Cluster Survey. VI. Isophotal Analysis and the Structure of Early-Type Galaxies (2006)
Ferrarese, Laura, Cote, Patrick, Jordan, Andres, Peng, Eric W., Blakeslee, John P., Piatek, Slawomir, ...
(Abridged) We present a detailed analysis of the morphology, isophotal parameters and surface brightness profiles for 100 early-type members of the Virgo Cluster, from dwarfs (M_B = -15.1 mag) to...
The Spiderweb galaxy: A forming massive cluster galaxy at z ~ 2 (2006)
Miley, George K., Overzier, Roderik A., Zirm, Andrew W., Ford, Holland C., Kurk, Jaron, Pentericci, Laura, ...
We present a deep image of the radio galaxy MRC 1138-262 taken with the Hubble Space Telescope (HST) at a redshift of z=2.2. The galaxy is known to have properties of a cD galaxy progenitor and be...
Gregory R. Sivakoff, Andrés Jordán, Craig L. Sarazin, John P. Blakeslee, Patrick Côté, Laura Ferrarese, ...
LMXBs form efficiently in GCs. By combining Chandra and HST ACS observations of 11 massive early-type galaxies in the Virgo Cluster, we use the most accurate identification of LMXBs and GCs to date...
The ACS Virgo Cluster Survey XI. The Nature of Diffuse Star Clusters in Early-Type Galaxies (2005)
Peng, Eric W., Cote, Patrick, Jordan, Andres, Blakeslee, John P., Ferrarese, Laura, Mei, Simona, ...
We use HST/ACS imaging of 100 early-type galaxies in the ACS Virgo Cluster Survey to investigate the nature of diffuse star clusters (DSCs). Compared to globular clusters (GCs), these star clusters...
The Morphological Demographics of galaxies in the ACS Hubble Ultra Deep Parallel Fields (2005)
Menanteau, Felipe, Ford, Holland C., Motta, Veronica, Benitez, Narciso, Martel, Andre R., Blakeslee, John P., ...
We present a morphological analysis of distant field galaxies using the deep ACS images from the public parallel NICMOS observations of the Hubble Ultra Deep Field obtained in the F435W (B), F606W...
Peng, Eric W., Jordan, Andres, Cote, Patrick, Blakeslee, John P., Ferrarese, Laura, Mei, Simona, ...
We present the color distributions of globular cluster (GC) systems for 100 Virgo cluster early-type galaxies observed in the ACS Virgo Cluster Survey. The color distributions of individual GC...
Jordan, Andres, Cote, Patrick, Blakeslee, John P., Ferrarese, Laura, McLaughlin, Dean E., Mei, Simona, ...
We have measured half-light radii, r_h, for globular clusters (GCs) belonging to the 100 early-type galaxies observed in the ACS Virgo Cluster Survey and the elliptical galaxy NGC 4697. An analysis...
Cantiello, Michele, Blakeslee, John P., Raimondo, Gabriella, Mei, Simona, Brocato, Enzo, Capaccioli, Massimo
We study surface brightness fluctuations (SBF) in a sample of 8 elliptical galaxies using Advanced Camera for Surveys (ACS) Wide Field Channel (WFC) data drawn from the Hubble Space Telescope (HST)...
The ACS Virgo Cluster Survey V: SBF Calibration for Giant and Dwarf Early-type Galaxies (2005)
Mei, Simona, Blakeslee, John P., Tonry, John L., Jordan, Andres, Peng, Eric W., Cote, Patrick, ...
As part of the Advanced Camera for Survey (ACS) Virgo Cluster Survey, we have measured Surface Brightness Fluctuations (SBF) in a sample of 100 early-type Virgo galaxies. Distances derived from these...
Discovery of Strong Lensing by an Elliptical Galaxy at z=0.0345 (2005)
Smith, Russell J., Blakeslee, John P., Lucey, John R., Tonry, John
We have discovered strong gravitational lensing by the galaxy ESO325-G004, in images obtained with the Advanced Camera for Surveys on the Hubble Space Telescope. The lens galaxy is a boxy...
Hasegan, Monica, Jordan, Andres, Cote, Patrick, Djorgovski, S. G., McLaughlin, Dean E., Blakeslee, John P., ...
We investigate the connection between globular clusters and ultra-compact dwarf galaxies (UCDs) by examining the properties of several compact objects associated with M87, all of which were...
Mei, Simona, Blakeslee, John P., Tonry, John L., Jordan, Andres, Peng, Eric W., Cote, Patrick, ...
The Advanced Camera for Surveys (ACS) Virgo Cluster Survey is a large program to image 100 early-type Virgo galaxies using the F475W and F850LP bandpasses of the Wide Field Channel of the ACS...
The ACS Virgo Cluster Survey II. Data Reduction Procedures (2004)
Jordan, Andres, Blakeslee, John P., Peng, Eric W., Mei, Simona, Cote, Patrick, Ferrarese, Laura, ...
The ACS Virgo Cluster Survey is a large program to carry out multi-color imaging of 100 early-type members of the Virgo Cluster using the Advanced Camera for Surveys (ACS) on the Hubble Space...
Jordan, Andres, Cote, Patrick, Ferrarese, Laura, Blakeslee, John P., Mei, Simona, Merritt, David, ...
The ACIS instrument on board the Chandra X-ray Observatory has been used to carry out the first systematic study of low-mass X-ray binaries (LMXBs) in M87. We identify 174 X-ray point-sources, of...
The ACS Virgo Cluster Survey. I. Introduction to the Survey (2004)
Cote, Patrick, Blakeslee, John P., Ferrarese, Laura, Jordan, Andres, Mei, Simona, Merritt, David, ...
The Virgo Cluster is the dominant mass concentration in the Local Supercluster and the largest collection of elliptical and lenticular galaxies in the nearby universe. In this paper, we present an...
The Extragalactic Distance Scale (2003)
Jensen, Joseph B., Tonry, John L., Blakeslee, John P.
Significant progress has been made during the last 10 years toward resolving the debate over the expansion rate of the Universe. The current value of the Hubble parameter, Ho, is now arguably known...
Cote, Patrick, McLaughlin, Dean E., Cohen, Judith G., Blakeslee, John P.
We have measured radial velocities for 196 globular clusters (GCs) around M49, the brightest member of the Virgo Cluster. Combined with published data, they bring the total number of GCs with...
Blakeslee, John P., Tsvetanov, Zlatan I., Riess, Adam G., Ford, Holland C., Illingworth, Garth D., Magee, Daniel, ...
We present observations of the first two supernovae discovered with the recently installed Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. The supernovae were found in Wide Field...
Jensen, Joseph B., Tonry, John L., Barris, Brian J., Thompson, Rodger I., Liu, Michael C., Rieke, Marcia J., ...
To empirically calibrate the IR surface brightness fluctuation (SBF) distance scale and probe the properties of unresolved stellar populations, we measured fluctuations in 65 galaxies using NICMOS on...
Testing the Supernova, Cepheid, and Early-type Galaxy Distance Scales (2001)
I summarize recent work comparing relative distances measured to individual galaxies with independent methods. The comparisons include: ground-based surface brightness fluctuation (SBF) and...
Early-type Galaxy Distances from the Fundamental Plane and Surface Brightness Fluctuations (2001)
Blakeslee, John P., Lucey, John R., Tonry, John L., Hudson, Michael J., Narayanan, Vijay K., Barris, Brian J.
We compare two methods for deriving distances to early-type galaxies: fundamental plane (FP) and surface brightness fluctuations (SBF) distances for 170 galaxies. A third set of distances is provided...
Cluster-Cluster Lensing in Abell 2152 (2001)
We discuss lensing properties of the nearby cluster Abell 2152. Recent work shows that Abell 2152 is actually the projection of two different clusters, one of which is a Hercules supercluster member...
A Synthesis of Data from Fundamental Plane and Surface Brightness Fluctuation Surveys (2001)
Blakeslee, John P., Lucey, John R., Barris, Brian J., Hudson, Michael J., Tonry, John L.
We perform a series of comparisons between distance-independent photometric and spectroscopic properties used in the surface brightness fluctuations (SBF) and fundamental plane (FP) methods of...
Reconciliation of the Surface Brightness Fluctuations and Type Ia Supernovae Distance Scales (2001)
Ajhar, Edward A., Tonry, John L., Blakeslee, John P., Riess, Adam G., Schmidt, Brian P.
We present Hubble Space Telescope measurements of surface brightness fluctuations (SBF) distances to early-type galaxies that have hosted Type Ia supernovae (SNIa). The agreement in the relative SBF...
The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances (2000)
Tonry, John L., Dressler, Alan, Blakeslee, John P., Ajhar, Edward A., Fletcher, Andre B., Luppino, Gerard A., ...
We report data for $I$ band Surface Brightness Fluctuation (SBF) magnitudes, V-I colors, and distance moduli for 300 galaxies. The Survey contains E, S0 and early-type spiral galaxies in the...
Lensing in the Hercules Supercluster (2000)
Blakeslee, John P., Metzger, Mark R., Kuntschner, Harald, Cote, Patrick
We report Keck LRIS observations of an arc-like background galaxy near the center of Abell 2152 (z=0.043), one of the three clusters comprising the Hercules supercluster. The background object has a...
Huddled Masses Yearning to Stream Free: Globular Clusters in the Hearts of Galaxy Clusters (2000)
Extremely rich populations of globular clusters, numbering ten thousand or more, surround the central giant galaxies in rich clusters. I discuss some recent spectroscopic and photometric observations...
The Principal Axis of the Virgo Cluster (2000)
West, Michael J., Blakeslee, John P.
Using accurate distances to individual Virgo cluster galaxies obtained by the method of Surface Brightness Fluctuations, we show that Virgo's brightest ellipticals have a remarkably collinear...
Stellar Populations and Surface Brightness Fluctuations: New Observations and Models (2000)
Blakeslee, John P., Vazdekis, Alexandre, Ajhar, Edward A.
We examine the use of surface brightness fluctuations (SBF) for both stellar population and distance studies. New V-band SBF data are reported for five Fornax cluster galaxies and combined with...
Kelson, Daniel D., Illingworth, Garth D., Tonry, John L., Freedman, Wendy L., Kennicutt, Robert C., ...
Using published photometry and spectroscopy, we construct the fundamental plane and D_n-Sigma relations in Leo I, Virgo and Fornax. The published Cepheid P-L relations to spirals in these clusters...
The SBF Survey of Galaxy Distances. II. Local and Large-Scale Flows (1999)
Tonry, John L., Blakeslee, John P., Ajhar, Edward A., Dressler, Alan
We present analysis of local large scale flows using the Surface Brightness Fluctuation (SBF) Survey for the distances to 300 early-type galaxies. Our models of the distribution function of mean...
Globular Clusters in Dense Clusters of Galaxies (1999)
Deep imaging data from the Keck II telescope are employed to study the globular cluster (GC) populations in the cores of six rich Abell clusters. The sample includes A754, A1644, A2124, A2147, A2151,...
A Lensed Arc in the Low Redshift Cluster Abell 2124 (1998)
Blakeslee, John P., Metzger, Mark R.
We report the discovery of an arc-like object 27" from the center of the cD galaxy in the redshift $z=0.066$ cluster A2124. Observations with the Keck II telescope reveal that the object is a...
Distances from Surface Brightness Fluctuations (1998)
Blakeslee, John P., Ajhar, Edward A., Tonry, John L.
The practice of measuring galaxy distances from their spatial fluctuations in surface brightness is now a decade old. While several past articles have included some review material, this is the first...
An Old Cluster in NGC 6822 (1998)
Cohen, Judith G., Blakeslee, John P.
We present spectroscopy of two clusters in the dwarf irregular galaxy NGC 6822. From these we deduce an age for Cluster VII of 11 Gyr and [Fe/H] = -1.95 +/- 0.15 dex. Cluster VII appears to be an...
The Ages and Abundances of the M87 Globular Clusters (1997)
Cohen, Judith G., Blakeslee, John P., Ryzhov, Anton
A subset of 150 globular clusters in M87 has been selected on the basis of S/N ratio for abundance and age determinations from the sample of Paper I. Indices measuring the strength of the strongest...
Globular Clusters in 19 Northern Abell Clusters (1997)
Blakeslee, John P., Tonry, John L., Metzger, Mark R.
We study the globular cluster (GC) populations of 21 giant elliptical galaxies in 19 Abell clusters. This method, applied here primarily in the R band, is based on the surface brightness fluctuations...
The Dependence of Globular Cluster Number on Density for Abell Cluster Central Galaxies (1997)
A study of the globular cluster systems of 23 brightest, or central, galaxies in 19 Abell clusters has recently been completed. This Letter presents some of the newly discovered correlations of the...
Tonry, John L., Blakeslee, John P., Ajhar, Edward A., Dressler, Alan
We describe a program of surface brightness fluctuation (SBF) measurements for determining galaxy distances. This paper presents the photometric calibration of our sample and of SBF in general....
Globular Clusters in Fornax: Does $M^0$ Depend on Environment? (1996)
Blakeslee, John P., Tonry, John L.
We present the $V$-band globular cluster luminosity functions (GCLFs) of the Fornax Cluster galaxies NGC 1344, NGC 1380, NGC 1399, and NGC 1404. Our observations reach to $V = 24.8$, roughly one...