Irwin, Jonathan, Charbonneau, David, Berta, Zachory K., Quinn, Samuel N., Latham, David W., Torres, Guillermo, ...
We report the detection of eclipses in GJ 3236, a bright (I = 11.6) very low mass binary system with an orbital period of 0.77 days. Analysis of light- and radial velocity curves of the system...
Inada, Naohisa, Oguri, Masamune, Falco, Emilio E., Broadhurst, Tom J., Ofek, Eran O., Kochanek, Christopher S., ...
We present the results of deep spectroscopy for the central region of the cluster lens SDSS J1004+4112 with the Subaru telescope. A secure detection of an emission line of the faint blue stellar...
Blake, Cullen H., Bloom, Joshua S., Latham, David W., Szentgyorgyi, Andrew H., Skrutskie, Michael F., Falco, Emilio E., ...
Stars of late-M and L spectral types, collectively known as Ultracool Dwarfs (UCDs), may be excellent targets for searches for extrasolar planets. Owing to their small radii, the signal from an...
The Rapidly Flaring Afterglow of the Very Bright and Energetic GRB 070125 (2008)
Updike, Adria C., Haislip, Joshua B., Nysewander, Melissa C., Fruchter, Andrew S., Kann, D. Alexander, Klose, Sylvio, ...
We report on multi-wavelength observations, ranging from the X-ray to radio wave bands, of the IPN-localized gamma-ray burst GRB 070125. Spectroscopic observations reveal the presence of absorption...
The SDSS Discovery of a Strongly Lensed Post-Starburst Galaxy at z=0.766 (2008)
Shin, Min-Su, Strauss, Michael A., Oguri, Masamune, Inada, Naohisa, Falco, Emilio E., Broadhurst, Tom, ...
We present the first result of a survey for strong galaxy-galaxy lenses in Sloan Digital Sky Survey (SDSS) images. SDSS J082728.70+223256.4 was selected as a lensing candidate using selection...
The third image of the large-separation lensed quasar SDSS J1029+26231 (2008)
Oguri, Masamune, Ofek, Eran O., Inada, Naohisa, Morokuma, Tomoki, Falco, Emilio E., Kochanek, Christopher S., ...
We identify a third image in the unique quasar lens SDSS J1029+2623, the second known quasar lens produced by a massive cluster of galaxies. The spectrum of the third image shows similar emission and...
X-Ray and Optical Microlensing in the Lensed Quasar PG 1115+080 (2008)
Morgan, Christopher W., Kochanek, Christopher S., Dai, Xinyu, Morgan, Nicholas D., Falco, Emilio E.
We analyzed the microlensing of the X-ray and optical emission of the lensed quasar PG 1115+080. We find that the effective radius of the X-ray emission is 1.3(+1.1 -0.5) dex smaller than that of the...
The Third Image of the Large-Separation Lensed Quasar SDSS J1029+2623 (2008)
Oguri, Masamune, Ofek, Eran O., Inada, Naohisa, Morokuma, Tomoki, Falco, Emilio E., Kochanek, Christopher S., ...
We identify a third image in the unique quasar lens SDSS J1029+2623, the second known quasar lens produced by a massive cluster of galaxies. The spectrum of the third image shows similar emission 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,
The Updated Zwicky Catalog (UZC) (2007)
Emilio E. Falco, Michael J. Kurtz, Margaret J. Geller, John P. Huchra, James Peters
The Zwicky Catalog of galaxies (ZC), with mZw 15:5, has been the basis for the Center for Astrophysics (CfA) redshift surveys. To date, analyses of the ZC and redshift surveys based on it have relied...
Type Ia Supernovae are Good Standard Candles in the Near Infrared: Evidence from PAIRITEL (2007)
Wood-Vasey, W. Michael, Friedman, Andrew S., Bloom, Joshua S., Hicken, Malcolm, Modjaz, Maryam, Kirshner, Robert P., ...
We have obtained 1087 NIR (JHKs) measurements of 21 SNe Ia using PAIRITEL, nearly doubling the number of well-sampled NIR SN Ia light curves. These data strengthen the evidence that SNe Ia are...
Simultaneous Estimation of Time Delays and Quasar Structure (2007)
Morgan, Christopher W., Eyler, Michael E., Kochanek, C. S., Morgan, Nicholas D., Falco, Emilio E., Vuissoz, Christel, ...
We expand our Bayesian Monte Carlo method for analyzing the light curves of gravitationally lensed quasars to simultaneously estimate time delays and quasar structure including their mutual...
The Quasar Accretion Disk Size - Black Hole Mass Relation (2007)
Morgan, Christopher W., Kochanek, C. S., Morgan, Nicholas D., Falco, Emilio E.
We use the microlensing variability observed for nine gravitationally lensed quasars to show that the accretion disk size at 2500 Angstroms is related to the black hole mass by log(R_2500/cm) =...
Kocevski, Daniel, Modjaz, Maryam, Bloom, Joshua S., Foley, Ryan, Starr, Daniel, Blake, Cullen H., ...
We report simultaneous multicolor near-infrared (NIR) observations of the supernova associated with x-ray Flash 060218 during the first 16 days after the high energy event. We find that the light...
TrES-2: The First Transiting Planet in the Kepler Field (2006)
O'Donovan, Francis T., Charbonneau, David, Mandushev, Georgi, Dunham, Edward W., Latham, David W., Torres, Guillermo, ...
We announce the discovery of the second transiting hot Jupiter discovered by the Trans-atlantic Exoplanet Survey. The planet, which we dub TrES-2, orbits the nearby star GSC 03549-02811 every 2.47063...
Time-Delay Measurement for the Quadruple Lens RX J1131-1231 (2006)
Morgan, Nicholas D., Kochanek, Christopher S., Falco, Emilio E., Dai, Xinyu
We have measured the three time delays for the quadruple gravitational lens RX J1131-1231 using two seasons of monitoring data. The short delays between cusp images are A-B = 11.98 +1.52,-1.27 days...
Microlensing of the Lensed Quasar SDSS0924+0219 (2006)
Morgan, Christopher W., Kochanek, C. S., Morgan, Nicholas D., Falco, Emilio E.
We analyze V, I and H band HST images and two seasons of R-band monitoring data for the gravitationally lensed quasar SDSS0924+0219. We clearly see that image D is a point-source image of the quasar...
Peng, Chien Y., Impey, Chris D., Rix, Hans-Walter, Keeton, Charles R., Falco, Emilio E., Kochanek, Chris S., ...
Gravitational lensing assists in the detection of quasar hosts by amplifying and distorting the host light away from the unresolved quasar core images. We present the results of HST observations of...
Peng, Chien Y., Impey, Chris D., Rix, Hans-Walter, Kochanek, Christopher S., Keeton, Charles R., Falco, Emilio 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 analogous...
Peng, Chien Y., Impey, Chris D., Rix, Hans-Walter, Falco, Emilio E., Keeton, Charles R., Kochanek, Chris S., ...
Gravitational lensing assists in the detection of quasar hosts by amplifying and distorting the host light away from the unresolved quasar core images. We present the results of HST observations of...
Spectroscopic redshifts for seven lens galaxies (2006)
Ofek, Eran O., Maoz, Dan, Rix, Hans-Walter, Kochanek, Christopher S., Falco, Emilio E.
The use of gravitationally lensed quasars for cosmological applications and as probes of galaxy structure and evolution requires knowledge about the lens redshift, which is unknown for a large...
Autonomous Observing and Control Systems for PAIRITEL, a 1.3m Infrared Imaging Telescope (2005)
Bloom, J. S., Starr, Dan L., Blake, Cullen H., Skrutskie, M. F., Falco, Emilio E.
The Peters Automated Infrared Imaging Telescope (PAIRITEL) is the first meter-class telescope operating as a fully robotic IR imaging system. Dedicated in October 2004, PAIRITEL began regular...
Halo Structures of Gravitational Lens Galaxies (2005)
Yoo, Jaiyul, Kochanek, Christopher S., Falco, Emilio E., McLeod, Brian A.
We explore the halo structure of four gravitational lenses with well-observed, thin Einstein rings. We find that the gravitational potentials are well described by ellipsoidal density distributions...
Spectroscopic Redshifts for Seven Lens Galaxies (2005)
Ofek, Eran O., Maoz, Dan, Rix, Hans-Walter, Kochanek, Christopher S., Falco, Emilio E.
We report VLT observations of 11 lensed quasars, designed to measure the redshifts of their lens galaxies. We successfully determined the redshifts for seven systems, five of which were previously...
Transit Photometry of the Core-Dominated Planet HD 149026b (2005)
Charbonneau, David, Winn, Joshua N., Latham, David W., Bakos, Gaspar, Falco, Emilio E., Holman, Matthew J., ...
We report g, V, and r photometric time series of HD 149026 spanning predicted times of transit of the Saturn-mass planetary companion, which was recently discovered by Sato and collaborators. We...
Discovery of Multiply Imaged Galaxies behind the Cluster and Lensed Quasar SDSS J1004+4112 (2005)
Sharon, Keren, Ofek, Eran O., Smith, Graham P., Broadhurst, Tom J., Maoz, Dan, Kochanek, Christopher S., ...
We have identified three multiply imaged galaxies in Hubble Space Telescope images of the redshift z=0.68 cluster responsible for the large-separation quadruply lensed quasar, SDSS J1004+4112....
The Lens Galaxy In PG1115+080 is an Ellipse (2005)
Yoo, Jaiyul, Kochanek, Christopher S., Falco, Emilio E., McLeod, Brian A.
We use the structure of the Einstein ring image of the quasar host galaxy in the four-image quasar lens PG1115+080 to determine the angular structure of the gravitational potential of the lens...
PKS 1830-211: A Face-On Spiral Galaxy Lens (2002)
Winn, Joshua N., Kochanek, Christopher S., McLeod, Brian A., Falco, Emilio E., Impey, Christopher D., Rix, Hans-Walter
We present new Hubble Space Telescope images of the gravitational lens PKS 1830-211, which allow us to characterize the lens galaxy and update the determination of the Hubble constant from this...
PKS 1830-211: A Face-on Spiral Galaxy Lens (2002)
Winn, Joshua N., Kochanek, Christopher S., McLeod, Brian A., Falco, Emilio E., Impey, Christopher D., Rix, Hans-Walter
The 2MASS Luminosity, Velocity, and Mass (2001)
Functions Of Galaxies, Michael A. Pahre, Chris S. Kochanek, Emilio E. Falco, John P. Huchra
The velocity function (VF) of galaxies is analogous to the luminosity function (LF), but a more direct tool for comparing observations and theory. The 2MASS LF is calculated here for a local sample...
Wambsganss, Joachim, Brunner, Hermann, Schindler, Sabine, Falco, Emilio E.
We report the first detection of the gravitationally lensed quasar Q2237+0305 in X-rays. With a ROSAT/HRI exposure of 53 ksec taken in Nov./Dec. 1997, we found a count rate of 0.006 counts per second...
The Updated Zwicky Catalog (UZC) (1999)
Falco, Emilio E., Kurtz, Michael J., Geller, Margaret J., Huchra, John P., Peters, James, Berlind, Perry, ...
The Zwicky Catalog of galaxies (ZC), with m_Zw
A reassessment of the data and models of the gravitational lens Q0957+561 (1998)
Barkana, Rennan, Lehar, Joseph, Falco, Emilio E., Grogin, Norman A., Keeton, Charles R., Shapiro, Irwin I.
We examine models of the mass distribution for the first known case of gravitational lensing. Several new sets of constraints are used, based on recent observations. We remodel the VLBI observations...
The Century Survey: A Deeper Slice of the Universe (1997)
Geller, Margaret J., Kurtz, Michael J., Thorstensen, John R., ...
The ``Century Survey'' (CS hereafter) is a complete redshift survey of a 1$^\circ$-wide strip. It covers 0.03 steradians to a limiting m$_R$ = 16.13. The survey is 98.4% complete and contains 1762...
MGC2214+3550: A New Binary Quasar (1997)
Muñoz, José A., Falco, Emilio E., Kochanek, Christopher S., Lehár, Joseph, Herold, Lori K., Fletcher, André B., ...
We report the discovery of a binary quasar, MGC2214+3550 A,B, whose components have similar optical spectra at a redshift z=0.88. The quasars are separated on the sky by 3.0", and have a magnitude...
An estimate of H_0 from Keck spectroscopy of the gravitational lens system 0957+561 (1997)
Falco, Emilio E., Shapiro, Irwin I., Moustakas, Leonidas A., Davis, Marc
We present long-slit LRIS/Keck spectroscopic observations of the gravitational lens system 0957+561. Averaged over all of our data, the rest-frame velocity dispersion sigma_v of the central lens...
HST Observations and Models of The Gravitational Lens System MG 0414+0534 (1996)
Falco, Emilio E., Lehar, Joseph, Shapiro, Irwin I.
Quadruple gravitational lens systems offer the possibility of measuring time delays for image pairs, microlensing effects, and extinction in distant galaxies. Observations of these systems may be...
From Keck Spectroscopy, Emilio E. Falco, Irwin I. Shapiro, Leonidas A. Moustakas, Marc Davis
We present long-slit LRIS/Keck spectroscopic observations of the gravitational lens system 0957 + 561. Averaged over all of our data, the rest-frame velocity dispersion oe v of the central lens...