Paul Goudfrooij

The 2005 HST Calibration Workshop Space Telescope Science Institute, 2005 (2009)

A. M. Koekemoer, P. Goudfrooij, L. L. Dressel, Paul Goudfrooij, Ralph C. Bohlin, Jesús Maíz-apellániz

Abstract. We review the on-orbit spectroscopic observations that are being used to characterize the Charge Transfer Efficiency (CTE) of the STIS CCD in spectroscopic mode. We parametrize the...

Improving the Rectification of Spectral Images (2009)

A. M. Koekemoer, P. Goudfrooij, L. L. Dressel, Linda Dressel, Paul Barrett, Paul Goudfrooij, ...

Abstract. Single rows in STIS rectified spectral images are being analyzed in science programs where the highest obtainable spatial resolution is needed. Here we discuss two problems that have...

The STIS Closeout Plan (2009)

A. M. Koekemoer, P. Goudfrooij, L. L. Dressel, Paul Goudfrooij, Ra Aloisi, ...

Abstract. The huge archive of STIS observations constitutes a unique —and arguably the most comprehensive — source of spectroscopy in the UV and spatiallyresolved spectroscopy in the optical...

Population Parameters of Intermediate-Age Star Clusters in the Large Magellanic Cloud. I. NGC 1846 and its Wide Main Sequence Turnoff (2009)

Goudfrooij, Paul, Puzia, Thomas H., Kozhurina-Platais, Vera, Chandar, Rupali

The Advanced Camera for Surveys on board the Hubble Space Telescope has been used to obtain deep, high-resolution images of the intermediate-age star cluster NGC 1846 in the Large Magellanic Cloud....

Globular cluster systems in nearby dwarf galaxies - II. Nuclear star clusters and their relation to massive Galactic globular clusters (2009)

Georgiev, Iskren Y., Hilker, Michael, Puzia, Thomas H., Goudfrooij, Paul, Baumgardt, Holger

(Abridged) Using luminosities and structural parameters of globular clusters (GCs) in the nuclear regions (nGCs) of low-mass dwarf galaxies from HST/ACS imaging we derive the present-day escape...

Globular Cluster Populations in Four Early-Type Poststarburst Galaxies (2008)

Maybhate, Aparna, Goudfrooij, Paul, Schweizer, Francois, Puzia, Thomas H., Carter, David

We present a study of the globular cluster systems of four early-type poststarburst galaxies using deep g and I-band images from the ACS camera aboard the Hubble Space Telescope (HST). All the...

Old globular clusters in magellanic-type dwarf irregular galaxies (2008)

Georgiev, Iskren Y., Goudfrooij, Paul, Puzia, Thomas H., Hilker, Michael

We present a study of the old globular clusters (GC) using archival F606W and F814W HST/ACS images of 19 Magellanic-type dwarf Irregular (dIrr) galaxies found in nearby (2 - 8 Mpc) associations of...

The HST/ACS Coma Cluster Survey: I - Survey Objectives and Design (2008)

Carter, David, Goudfrooij, Paul, Mobasher, Bahram, Ferguson, Henry C., Puzia, Thomas H., Aguerri, Alfonso L., ...

We describe the HST ACS Coma cluster Treasury survey, a deep two-passband imaging survey of one of the nearest rich clusters of galaxies, the Coma cluster (Abell 1656). The survey was designed to...

The Hubble Space Telescope Advanced Camera for Surveys Coma Cluster survey I: survey objectives and design (2008)

Carter, David, Goudfrooij, Paul, Mobasher, Bahram, Ferguson, Henry C., Puzia, Thomas H., Aguerri, Alfonso L., ...

We describe the HST ACS Coma Cluster Treasury survey, a deep two-passband imaging survey of one of the nearest rich clusters of galaxies, the Coma Cluster (Abell 1656). The survey was designed to...

The Hubble Space Telescope Advanced Camera for Surveys Coma Cluster survey I: survey objectives and design (2008)

Carter, David, Goudfrooij, Paul, Mobasher, Bahram, Ferguson, Henry C., Puzia, Thomas H., Aguerri, Alfonso L., ...

We describe the HST ACS Coma Cluster Treasury survey, a deep two-passband imaging survey of one of the nearest rich clusters of galaxies, the Coma Cluster (Abell 1656). The survey was designed to...

Normal Globular Cluster Systems in Massive Low Surface Brightness Galaxies (2007)

Villegas, Daniela, Kissler-Patig, Markus, Jordán, Andrés, Goudfrooij, Paul, Zwaan, Martin

We present the results of a study of the globular cluster systems of 6 massive spiral galaxies, originally cataloged as low surface brightness galaxies but here shown to span a wide range of central...

Dynamical Evolution of Globular Cluster Systems formed in Galaxy Mergers: Deep HST/ACS Imaging of Old and Intermediate-Age Globular Clusters in NGC 3610 (2007)

Goudfrooij, Paul, Schweizer, Francois, Gilmore, Diane, Whitmore, Bradley C.

(ABRIDGED) The ACS camera on board the Hubble Space Telescope has been used to obtain deep images of the giant elliptical galaxy NGC 3610, a well-established dissipative galaxy merger remnant. These...

ACS/WFC: Differential CTE corrections for (2007)

Vera Kozhurina-platais, Paul Goudfrooij, Thomas H. Puzia

We present an analysis of the Charge Transfer Efficiency correction for a science project using high-precision photometry in a rather crowded field derived with the “effective PSF” (ePSF) method...

A Database of 2MASS Near-Infrared Colors of Magellanic Cloud Star Clusters (2006)

Pessev, Peter M., Goudfrooij, Paul, Puzia, Thomas H., Chandar, Rupali

The (rest-frame) near-IR domain contains important stellar population diagnostics and is often used to estimate masses of galaxies at low as well as high redshifts. However, many stellar population...

A Genuine Intermediate-Age Globular Cluster in M33 (2006)

Chandar, Rupali, Puzia, Thomas H., Sarajedini, Ata, Goudfrooij, Paul

We present deep integrated-light spectroscopy of nine M33 globular clusters taken with the Hectospec instrument at the MMT Observatory. Based on our spectroscopy and previous deep color-magnitude...

Extremely alpha-Enriched Globular Clusters in Early-Type Galaxies: A Step towards the Dawn of Stellar Populations? (2006)

Puzia, Thomas H., Kissler-Patig, Markus, Goudfrooij, Paul

We compare [alpha/Fe], metallicity, and age distributions of globular clusters in elliptical, lenticular, and spiral galaxies, which we derive from Lick line index measurements. We find a large...

Integrated-light VRI imaging photometry of globular clusters in the Magellanic clouds (2006)

Goudfrooij, Paul, Gilmore, Diane, Kissler-Patig, Markus, Maraston, Claudia

We present accurate integrated-light photometry in Johnson/Cousins V, R, and I for a sample of 28 globular clusters in the Magellanic Clouds. The majority of the clusters in our sample have reliable...

The Group Evolution Multiwavelength Study (GEMS): bimodal luminosity functions in galaxy groups (2004)

Miles, Trevor A., Raychaudhury, Somak, Forbes, Duncan A., Goudfrooij, Paul, Ponman, Trevor J., Kozhurina-Platais, Vera

We present B and R-band luminosity functions (LF) for a sample of 25 nearby groups of galaxies. We find that the LFs of the groups with low X-ray luminosity (L_X < 10^{41.7} erg/s) are significantly...

The discovery of new galaxy members in the NGC 5044 and 1052 groups (2004)

McKay, N. P., Mundell, Carole, Brough, Sarah, Forbes, Duncan A., Barnes, David G., James, Phil A., ...

We present the results of neutral hydrogen (HI) observations of the NGC 5044 and NGC 1052 groups, as part of a GEMS (Group Evolution Multiwavelength Study) investigation into the formation and...

The discovery of new galaxy members in the NGC 5044 and 1052 groups (2004)

McKay, N. P., Mundell, Carole, Brough, Sarah, Forbes, Duncan A., Barnes, David G., James, Phil A., ...

We present the results of neutral hydrogen (HI) observations of the NGC 5044 and NGC 1052 groups, as part of a GEMS (Group Evolution Multiwavelength Study) investigation into the formation and...

Near-infrared imaging of ellipticals : surface brightness profiles and photometry (2003)

Bothun, Greg, Brodie, Jean P., Brown, Richard J., Forbes, Duncan A., Goudfrooij, Paul, Hau, George K., ...

We present near-infrared K-band imaging of a large sample of candidate merger remnant galaxies and Hickson Compact Group ellipticals. We derive light profile indices, effective radii and surface...

Near-infrared imaging of ellipticals : surface brightness profiles and photometry (2003)

Bothun, Greg, Brodie, Jean P., Brown, Richard J., Forbes, Duncan A., Goudfrooij, Paul, Hau, George K., ...

We present near-infrared K-band imaging of a large sample of candidate merger remnant galaxies and Hickson Compact Group ellipticals. We derive light profile indices, effective radii and surface...

Near-infrared imaging of ellipticals : surface brightness profiles and photometry (2003)

Bothun, Greg, Brodie, Jean P., Brown, Richard J., Forbes, Duncan A., Goudfrooij, Paul, Hau, George K., ...

We present near-infrared K-band imaging of a large sample of candidate merger remnant galaxies and Hickson Compact Group ellipticals. We derive light profile indices, effective radii and surface...

Near-infrared imaging of ellipticals : surface brightness profiles and photometry (2003)

Bothun, Greg, Brodie, Jean P., Brown, Richard J., Forbes, Duncan A., Goudfrooij, Paul, Hau, George K., ...

We present near-infrared K-band imaging of a large sample of candidate merger remnant galaxies and Hickson Compact Group ellipticals. We derive light profile indices, effective radii and surface...

Interstellar matter in Shapley-Ames elliptical galaxies. IV. A diffusely distributed component of dust and its effect on colour gradients (1995)

Goudfrooij, Paul, De Jong, Teije

The presence of dust in elliptical galaxies has recently been shown to be quite common. Deep optical multi-colour CCD imaging has revealed the presence of dust lanes and patches, and the technique of...