Hartman, J. D., Gaudi, B. S., Holman, M. J., McLeod, B. A., Stanek, K. Z., Barranco, J. A., ...
We present the results of a deep (15 ~< r ~< 23), 20 night survey for transiting planets in the intermediate age open cluster M37 (NGC 2099) using the Megacam wide-field mosaic CCD camera on the 6.5m...
Deep MMT Transit Survey of the Open Cluster M37 III: Stellar Rotation at 550 Myr (2008)
Hartman, J. D., Gaudi, B. S., Pinsonneault, M. H., Stanek, K. Z., Holman, M. J., McLeod, B. A., ...
In the course of conducting a deep (14.5 ~< r ~< 23), 20 night survey for transiting planets in the rich ~550 Myr old open cluster M37 we have measured the rotation periods of 575 stars which lie...
B. A. Mcleod, G. M. Bernstein, M. J. Rieke, D. W. Weedman
The gravitational lens MG0414+0534: a link between red galaxies
B. A. Mcleod, G. M. Bernstein, M. J. Rieke, E. V. Tollestrup, G. G. Fazio
We present new counts of field galaxies from more than 20 square arcminutes to a limiting magnitude of K=20 and from 2 square arcminutes to K=21.5. At the faintest magnitudes the counts are slightly...
Deep MMT Transit Survey of the Open Cluster M37 II: Variable Stars (2007)
Hartman, J. D., Gaudi, B. S., Holman, M. J., McLeod, B. A., Stanek, K. Z., Barranco, J. A., ...
We have conducted a deep ($15 \la r \la 23$), 20 night survey for transiting planets in the intermediate age ($\sim 550 {\rm Myr}$) open cluster M37 (NGC 2099) using the Megacam wide-field mosaic CCD...
Deep MMT Transit Survey of the Open Cluster M37 I: Observations and Cluster Parameters (2007)
Hartman, J. D., Gaudi, B. S., Holman, M. J., McLeod, B. A., Stanek, K. Z., Barranco, J. A., ...
We have conducted a deep ($15 \la r \la 23$), 20 night survey for transiting planets in the intermediate age open cluster M37 (NGC 2099) using the Megacam wide-field mosaic CCD camera on the 6.5m...
A Search for Transiting Hot Planets as Small as Neptune in the Open Cluster M37 (2007)
Hartman, J. D., Gaudi, B. S., Holman, M. J., McLeod, B. A., Stanek, K. Z., Barranco, J.
We are conducting a transit survey of the open cluster M37 using the Megacam instrument on the 6.5 m Multiple-Mirror Telescope. We have obtained ~4500 images of this cluster over 18.5 nights and have...
Peng, C. Y., Impey, C. D., Kochanek, C. S., Keeton, C. R., Falco, E. E., ...
In the present-day universe, supermassive black hole masses (MBH) appear to be strongly correlated with their galaxy's bulge luminosity, among other properties. In this study, we explore the...
Kochanek, C. S., Morgan, N. D., Falco, E. E., McLeod, B. A., Winn, J. N., Dembicky, J., ...
We present Hubble Space Telescope images and 2 years of optical photometry of the quadruple quasar HE0435-1223. The time delays between the intrinsic quasar variations are 14.4+/-0.8 (A-D), 8.0+/-0.8...
The FIRST-Optical-VLA Survey for Lensed Radio Lobes (2005)
Haarsma, D. B., Winn, J. N., Falco, E. E., Kochanek, C. S., Ammar, P., Boersma, C., ...
We present results from a survey for gravitationally lensed radio lobes. Lensed lobes are a potentially richer source of information about galaxy mass distributions than lensed point sources, which...
Hartman, J. D., Stanek, K. Z., Gaudi, B. S., Holman, M. J., McLeod, B. A.
We present the results from a three night, time-series study of the open cluster NGC 6791 using the Megacam wide-field mosaic CCD camera on the 6.5m MMT telescope. The aim of this study was to...
Deep Photometry of GRB 041006 Afterglow: Hypernova Bump at Redshift z=0.716 (2005)
Stanek, K. Z., Garnavich, P. M., Nutzman, P. A., Hartman, J. D., Garg, A., Adelberger, K., ...
We present deep optical photometry of the afterglow of gamma-ray burst (GRB) 041006 and its associated hypernova obtained over 65 days after detection (55 R-band epochs on 10 different nights). Our...
The extinction law in high redshift galaxies (2004)
Munoz, J. A., Falco, E. E., Kochanek, C. S., McLeod, B. A., Mediavilla, E.
We estimate the dust extinction laws in two intermediate redshift galaxies. The dust in the lens galaxy of LBQS1009-0252, which has an estimated lens redshift of zl~0.88, appears to be similar to...
Possible supernova associated with Q0957+561 (2004)
Peng, C. Y., Impey, C. D., Kochanek, C. S., Falco, E. E., Lehar, J., ...
IAUC 8298 available courtesy of the Central Bureau for Astronomical Telegrams.
The evolution of a mass-selected sample of early-type field galaxies (2003)
Rusin, D., Kochanek, C. S., Falco, E. E., Keeton, C. R., McLeod, B. A., Impey, C. D., ...
We investigate the evolution of mass-selected early-type field galaxies using a sample of 28 gravitational lenses spanning the redshift range 0 lt;~z lt;~1. Based on the redshift-dependent intercept...
The Evolution of a Mass-Selected Sample of Early-Type Field Galaxies (2002)
Rusin, D., Kochanek, C. S., Falco, E. E., Keeton, C. R., McLeod, B. A., Impey, C. D., ...
We investigate the evolution of mass-selected early-type field galaxies using a sample of 28 gravitational lenses spanning the redshift range 0 < z < 1. Based on the redshift-dependent intercept of...
Alcalde, D., Mediavilla, E., Moreau, O., Munoz, J. A., Libbrecht, C., Goicoechea, L. J., ...
We present VR observations of QSO 2237+0305 conducted by the GLITP collaboration from 1999 October 1 to 2000 February 3. The observations were made with the 2.56 m Nordic Optical Telescope at Roque...
B1359+154: A Six Image Lens Produced by a z=1 Compact Group of Galaxies (2000)
Rusin, D., Kochanek, C. S., Norbury, M., Falco, E. E., Impey, C. D., Lehar, J., ...
HST V and I-band observations show that the gravitational lens B1359+154 consists of six images of a single z_s=3.235 radio source and its star-forming host galaxy, produced by a compact group of...
NICMOS Observations of Low-Redshift Quasar Host Galaxies (2000)
We have obtained Near-Infrared Camera and Multi-Object Spectrometer images of 16 radio quiet quasars observed as part of a project to investigate the ``luminosity/host-mass limit.'' The limit results...
Cohn, J. D., Kochanek, C. S., McLeod, B. A., Keeton, C. R.
We consider a wide range of parametric mass models for B 1933+503, a ten-image radio lens, and identify shared properties of the models with the best fits. The approximate rotation curves varies by...
Munoz, J. A., Falco, E. E., Kochanek, C. S., Lehar, J., McLeod, B. A., McNamara, B. R., ...
We report the discovery of a new two-image gravitational lens candidate. The system RX J0921+4529 contains two z_s=1.66 quasars separated by 6."93 with an H band magnitude difference of $\Delta...
PMN J1838-3427: A new gravitationally lensed quasar (2000)
Winn, Joshua N., Hewitt, Jacqueline N., Schechter, Paul L., Dressler, Alan, Falco, E. E., Impey, C. D., ...
We report the discovery of a new double-image quasar that was found during a search for gravitational lenses in the southern sky. Radio source PMN J1838-3427 is composed of two flat-spectrum...
The Importance of Einstein Rings (2000)
Kochanek, C. S., Keeton, C. R., McLeod, B. A.
We develop a theory of Einstein rings and demonstrate it using the infrared Einstein ring images of the quasar host galaxies observed in PG1115+080, B1608+656 and B1938+666. The shape of an Einstein...
The Host Galaxy of the Lensed Quasar Q 0957+561 (2000)
Keeton, C. R., Falco, E. E., Impey, C. D., Kochanek, C. S., Lehar, J., McLeod, B. A., ...
Infrared images of the Q 0957+561 gravitational lens obtained with the Hubble Space Telescope show two large (\sim 5 arcsec) lensed images of the z_s=1.41 quasar host galaxy. Parts of the host galaxy...
The Evolution of Gravitational Lens Galaxies (1999)
Kochanek, C. S., Falco, E. E., Impey, C. D., Lehar, J., McLeod, B. A., ...
Most gravitational lens galaxies are early-type galaxies in relatively low density environments. We show that they lie on the same fundamental plane as early-type galaxies in both local and distant...
The Interstellar Medium of Lens Galaxies (1999)
McLeod, B. A., Falco, E. E., Kochanek, C. S., Lehar, J., Munoz, J. A., Impey, C. D., ...
We use observations from the CASTLES survey of gravitational lenses to study extinction in 23 lens galaxies with $0 < z_l < 1$. The median differential extinction between lensed images is $\Delta...
The CASTLES gravitational lensing tool (1999)
Falco, E. E., Kochanek, C. S., Lehar, J., McLeod, B. A., Munoz, J. A., Impey, C. D., ...
We describe a series of new applications of gravitational lenses as astrophysical and cosmological tools. Such applications are becoming possible thanks to advances in the quality and quantity of...
A New Wide-Separation Gravitational Lens Candidate: RXJ 0921+4529 (1999)
Munoz, J. A., Falco, E. E., Kochanek, C. S., McLeod, B. A., Lehar, J., McNamara, B. R., ...
The lens candidate RXJ 0921+4529 consists of two z_s=1.66 quasar separated by 6."93 with an H band magnitude difference of \Delta m=1.39. The lens appears to be a z_l=0.31 X-ray cluster, including a...
Kochanek, C. S., Falco, E. E., Impey, C. D., Lehar, J., McLeod, B. A., ...
Most gravitational lenses are early-type galaxies in relatively low density environments -- a ``field'' rather than a ``cluster'' population. We show that field early-type galaxies with 0 < z < 1, as...
The Quasar Pair Q 1634+267 A, B and the Binary QSO vs. Dark Lens Hypotheses (1999)
Peng, C. Y., Impey, C. D., Falco, E. E., Kochanek, C. S., Lehar, J., McLeod, B. A., ...
Deep HST/NICMOS H (F160W) band observations of the z=1.96 quasar pair Q 1634+267A,B reveal no signs of a lens galaxy to a 1 sigma threshold of approximately 22.5 mag. The minimum luminosity for a...
Munoz, J. A., Falco, E. E., Kochanek, C. S., Lehar, J., McLeod, B. A., Impey, C. D., ...
We describe the goals of the CASTLES (CfA-Arizona-Space-Telescope-LEns-Survey) project including a sample of NICMOS images of gravitational lenses and a brief list of the preliminary findings.
Falco, E. E., Impey, C. D., Kochanek, C. S., Lehar, J., McLeod, B. A., Rix, H-W., ...
We determine 37 differential extinctions in 23 gravitational lens galaxies over the range 0 < z_l < 1. Only 7 of the 23 systems have spectral differences consistent with no differential extinction....
Results from the CASTLES Survey of Gravitational Lenses (1998)
Kochanek, C. S., Falco, E. E., Impey, C. D., Lehar, J., McLeod, B. A.
We show that most gravitational lenses lie on the passively evolving fundamental plane for early-type galaxies. For burst star formation models (1 Gyr of star formation, then quiescence) in low...
Kochanek, C. S., Falco, E. E., Impey, C. D., Lehar, J., McLeod, B. A., ...
We have obtained and modeled new NICMOS images of the lens system MG1131+0456, which show that its lens galaxy is an H=18.6 mag, transparent, early-type galaxy at a redshift of about z_l = 0.85; it...
The gravitational lens MG0414+0534: a link between red galaxies and dust (1998)
McLeod, B. A., Bernstein, G. M., Rieke, M. J., Weedman, D. W.
We present near infrared observations of the red gravitational lens system MG0414+0534. Our images are of sufficient quality to allow photometry of all four QSO images and the lens galaxy. The...
Mccarthy Hooper Hege, M. Lloyd-hart, M. Lloyd-hart, T. D. Groesbeck, ...
Adaptive optics with a sodium resonance laser guide star was used at the Multiple Mirror Telescope (MMT) in 1996 April to image the core of the globular cluster M13 (NGC 6205). A 23 field was...
Mccarthy Hooper, M. Lloyd-hart, M. Lloyd-hart, T. D. Groesbeck, ...
Adaptive optics with a sodium resonance laser guide star was used at the Multiple Mirror Telescope (MMT) in 1996 April to image the core of the globular cluster M13 (NGC 6205). A 23² field was...
The Effects of Starbursts and Low-Surface-Brightness Galaxies on Faint Galaxy Models (1995)
We present models predicting the magnitude, redshift, and color distributions of field galaxies. We explore whether a fading starburst scenario can account for the observations of faint blue...
Gray Lloyd--Hart, T. Martinez, L. M. Close, G. Brusa, D. G. Bruns, B. A. Mcleod, ...
A new adaptive optics system has been constructed for moderately high resolution in the near infrared at the Multiple Mirror Telescope (MMT). The system, called FASTTRAC II, has been designed to...