Urrutia, Tanya, Becker, Robert H., White, Richard L., Glikman, Eilat, Lacy, Mark, Hodge, Jacqueline, ...
We present results on a survey to find extremely dust-reddened Type 1 quasars. Combining the FIRST radio survey, the 2MASS Infrared Survey and the Sloan Digital Sky Survey, we have selected a...
Five New High-Redshift Quasar Lenses from the Sloan Digital Sky Survey (2008)
Inada, Naohisa, Oguri, Masamune, Shin, Min-Su, Kayo, Issha, Strauss, Michael A., Morokuma, Tomoki, ...
We report the discovery of five gravitationally lensed quasars from the Sloan Digital Sky Survey (SDSS). All five systems are selected as two-image lensed quasar candidates from a sample of...
Urrutia, Tanya, Becker, Robert H., White, Richard L., Glikman, Eilat, Lacy, Mark, Hodge, Jacqueline, ...
We present results on a survey to find extremely dust-reddened Type-1 Quasars. Combining the FIRST radio survey, the 2MASS Infrared Survey and the Sloan Digital Sky Survey, we have selected a...
Urrutia, Tanya, Lacy, Mark, Becker, Robert H.
We present Hubble Space Telescope ACS images of 13 dust-reddened type 1 quasars selected from the FIRST/2MASS Red Quasar Survey. These quasars have high intrinsic luminosities after correction for...
Oguri, Masamune, Inada, Naohisa, Strauss, Michael A., Kochanek, Christopher S., Richards, Gordon T., Schneider, Donald P., ...
We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the...
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., Shin, Min-Su, Richards, Gordon T., Hennawi, Joseph F., ...
We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the...
Oguri, Masamune, Inada, Naohisa, Strauss, Michael A., Kochanek, Christopher S., Richards, Gordon T., Schneider, Donald P., ...
We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the...
Jiang, Linhua, Fan, Xiaohui, Annis, James, Becker, Robert H., White, Richard L., Chiu, Kuenley, ...
We present the discovery of five quasars at z ~ 6 selected from 260 deg2 of the Sloan Digital Sky Survey (SDSS) southern survey, a deep imaging survey obtained by repeatedly scanning a stripe along...
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., Shin, Min-Su, Richards, Gordon T., Hennawi, Joseph F., ...
We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the...
M. S. Brotherton, Wil Van Breugel, R. J. Smith, B. J. Boyle, T. Shanks, S. M. Croom, ...
We report the discovery of five broad-absorption-line (BAL) QSOs in a complete sample of 111 ultraviolet excess (UVX) QSO candidates also detected in the NRAO VLA Sky Survey. All five BAL QSOs, which...
Paul L. Schechter, Michael D. Gregg, Robert H. Becker, David J. Helf, Richard L. White
The V = 16:9 quasar FBQ 0951+2635 at redshift z = 1:24 appears double on CCD exposures taken in subarcsecond seeing. The two objects are separated by 1: 00 1 and differ in brightness by 0.9 mag. VLA...
Robert H. Becker, Richard L. White, Michael S. Brotherton, Chris D. Impey, Frederic H. Chaffee, ...
We present the results of an extension of the FIRST Bright Quasar Survey (FBQS) to the South Galactic cap, and to a fainter optical magnitude limit. Radio source counterparts with SERC R magnitudes...
Urrutia, Tanya, Lacy, Mark, Becker, Robert H.
We present Hubble ACS images of thirteen dust reddened Type-1 quasars selected from the FIRST/2MASS Red Quasar Survey. These quasars have high intrinsic luminosities after correction for dust...
A Survey of z~6 Quasars in the SDSS Deep Stripe: I. a Flux-Limited Sample at z_{AB} (2007)
Jiang, Linhua, Fan, Xiaohui, Annis, James, Becker, Robert H., White, Richard L., Chiu, Kuenley, ...
We present the discovery of five quasars at z~6 selected from 260 deg^2 of the Sloan Digital Sky Survey (SDSS) southern survey, a deep imaging survey obtained by repeatedly scanning a stripe along...
Oguri, Masamune, Inada, Naohisa, Strauss, Michael A., Kochanek, Christopher S., Richards, Gordon T., Schneider, Donald P., ...
We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the...
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., Shin, Min-Su, Richards, Gordon T., Hennawi, Joseph F., ...
We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the...
Radio AGN in 13,240 galaxy clusters from the Sloan Digital Sky Survey (2007)
Croft, Steve, De Vries, Wim, Becker, Robert H.
We correlate the positions of 13,240 Brightest Cluster Galaxies (BCGs) with 0.1
The FIRST-2MASS Red Quasar Survey (2007)
Glikman, Eilat, Helfand, David J., White, Richard L., Becker, Robert H., Gregg, Michael D., Lacy, Mark
Combining radio observations with optical and infrared color selection -- demonstrated in our pilot study to be an efficient selection algorithm for finding red quasars -- we have obtained optical...
Signals from the Noise: Image Stacking for Quasars in the FIRST Survey (2007)
White, Richard L., Helfand, David J., Becker , Robert H., Glikman, Eilat, De Vries, Wim
We present a technique to explore the radio sky into the nanojansky regime by employing image stacking using the FIRST survey. We first discuss the nonintuitive relationship between the mean and...
Two new gravitationally lensed double quasars from the Sloan Digital Sky Survey (2007)
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., White, Richard L., Kayo, Issha, Kochanek, Christopher S., ...
We report the discoveries of the two-image gravitationally lensed quasars SDSS J074653.03+440351.3 and SDSS J140624.82+612640.9, selected from the Sloan Digital Sky Survey (SDSS). SDSS J0746+4403,...
SDSS J1029_2623: a gravitationally lensed quasar with an image separation of 22.5 inches (2006)
Inada, Naohisa, Oguri, Masamune, Morokuma, Tomoki, Doi, Mamoru, Yasuda, Naoki, Becker, Robert H., ...
We report the discovery of a cluster-scale lensed quasar, SDSS J1029+2623, selected from the Sloan Digital Sky Survey. The lens system exhibits two lensed images of a quasar at z p 2.197. The image...
SDSS J1029+2623: A Gravitationally Lensed Quasar with an Image Separation of 22.5 Arcseconds (2006)
Inada, Naohisa, Oguri, Masamune, Morokuma, Tomoki, Doi, Mamoru, Yasuda, Naoki, Becker, Robert H., ...
We report the discovery of a cluster-scale lensed quasar, SDSS J1029+2623, selected from the Sloan Digital Sky Survey. The lens system exhibits two lensed images of a quasar at z_s=2.197. The image...
Schaefer, Justin J., Brotherton, Michael S., Shang, Zhaohui, Gregg, Michael D., Becker, Robert H., Laurent-Muehleisen, Sally A., ...
We have detected FIRST J101614.3+520916 with the XMM-Newton X-ray observatory. FIRST J101614.3+520916, one of the most extreme radio-loud, broad absorption line (BAL) quasars so far discovered, is...
Two New Gravitationally Lensed Double Quasars from the Sloan Digital Sky Survey (2006)
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., White, Richard L., Kayo, Issha, Kochanek, Christopher S., ...
We report the discoveries of the two-image gravitationally lensed quasars, SDSS J0746+4403 and SDSS J1406+6126, selected from the Sloan Digital Sky Survey (SDSS). SDSS J0746+4403, which will be...
High Resolution Mid-Infrared Imaging of Radio Ultra-Compact HII Regions (2006)
Giveon, Uriel, Richter, Matthew J., Becker, Robert H., White, Richard L.
We present data from mid-infrared Keck Telescope imaging of 18 radio-selected ultra-compact HII region candidates at diffraction-limited resolution. The goal of these observations is to determine the...
Signals from the Noise: Image Stacking for Quasars in the FIRST Survey (2006)
White, Richard L., Helfand, David J., Becker, Robert H., Glikman, Eilat, DeVries, Wim
We present a technique to explore the radio sky into the nanoJansky regime by employing image stacking using the FIRST survey. We first discuss the non-intuitive relationship between the mean and...
Discovery of a z=6.1 Radio-Loud Quasar in the NDWFS (2006)
McGreer, Ian D., Becker, Robert H., Helfand, David J., White, Richard L.
From examination of only 4 deg^2 of sky in the NOAO Deep Wide-Field Survey (NDWFS) region, we have identified the first radio-loud quasar at a redshift z>6. The object, FIRST J1427385+331241, was...
Howell, Steve B., Walter, Frederick M., Harrison, Thomas E., Huber, Mark E., Becker, Robert H., White, Richard L.
EF Eri is a magnetic cataclysmic variable that has been in a low accretion state for the past nine years. Low state optical spectra reveal the underlying Zeeman-split white dwarf absorption lines....
XMM-Newton Detection of the Rare FR II BAL Quasar FIRST J101614.3+520916 (2006)
Schaefer, Justin J., Brotherton, Michael S., Shang, Zhaohui, Gregg, Michael D., Becker, Robert H., Laurent-Muehleisen, Sally A., ...
We have detected FIRST J101614.3+520916 with the XMM-Newton X-ray Observatory. FIRST J101614.3+520916, one of the most extreme radio-loud, broad absorption line (BAL) quasars so far discovered, is...
Fan, Xiaohui, Strauss, Michael A., Richards, Gordon T., Hennawi, Joseph F., Becker, Robert H., White, Richard L., ...
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., White, Richard L., Gregg, Michael D., Schechter, Paul L., ...
We report the discoveries of two, two-image gravitationally lensed quasars selected from the Sloan Digital Sky Survey: SDSS J0806+2006 at z_s=1.540 and SDSS J1353+1138 at z_s=1.629 with image...
Fan, Xiaohui, Strauss, Michael A., Richards, Gordon T., Hennawi, Joseph F., Becker, Robert H., White, Richard L., ...
We present the discovery of seven quasars at z>5.7, selected from ~2000 deg^2 of multicolor imaging data of the Sloan Digital Sky Survey (SDSS). The new quasars have redshifts z from 5.79 to 6.13....
Fan, Xiaohui, Strauss, Michael A., Becker, Robert H., White, Richard L., Gunn, James E., Knapp, Gillian R., ...
We study the evolution of the ionization state of the IGM at the end of the reionization epoch using spectra of a sample of nineteen quasars at 5.7411}, and the average length of dark gaps with...
MAGPIS: A Multi-Array Galactic Plane Imaging Survey (2005)
Helfand, David J., Becker, Robert H., White, Richard L., Fallon, Adam, Tuttle, Sarah
We present the Multi-Array Galactic Plane Imaging Survey (MAGPIS), which maps portions of the first Galactic quadrant with an angular resolution, sensitivity and dynamic range that surpasses existing...
SDSSJ102111.02+491330.4: A Newly Discovered Gravitationally Lensed Quasar (2005)
Pindor, Bart, Eisenstein, Daniel J., Gregg, Michael D., Becker, Robert H., Inada, Naohisa, Oguri, Masamune, ...
We report follow-up observations of two gravitational lens candidates identified in the Sloan Digital Sky Survey (SDSS) dataset. We have confirmed that SDSS J102111.02+491330.4 is a previously...
SDSS J0246-0825: A New Gravitationally Lensed Quasar from the Sloan Digital Sky Survey (2005)
Inada, Naohisa, Burles, Scott, Gregg, Michael D., Becker, Robert H., Schechter, Paul L., Eisenstein, Daniel J., ...
We report the discovery of a new two-image gravitationally lensed quasar, SDSS J024634.11-082536.2 (SDSS J0246-0825). This object was selected as a lensed quasar candidate from the Sloan Digital Sky...
Helfand, David J., Becker, Robert H., White, Richard L.
We discovered independently the shell-type supernova remnant G12.82-0.02, recently reported by Brogan et al. (2005), which is coincident with the unidentified TeV gamma-ray source revealed in the...
Hennawi, Joseph F., Strauss, Michael A., Oguri, Masamune, Inada, Naohisa, Richards, Gordon T., Pindor, Bartosz, ...
We present a sample of 218 new quasar pairs with proper transverse separations R_prop < 1 Mpc/h over the redshift range 0.5 < z < 3.0, discovered from an extensive follow up campaign to find...
Chandra Observations of 12 Luminous Red Quasars (2005)
Urrutia, Tanya, Lacy, Mark, Gregg, Michael D., Becker, Robert H.
We present results of a study of 12 dust-reddened quasars with 0.4 < z < 2.65 and reddenings in the range 0.15 < E(B-V) < 1.7. We obtained ACIS-S X-ray spectra of these quasars, estimated the column...
New Catalogs of Compact Radio Sources in the Galactic Plane (2005)
White, Richard L., Becker, Robert H., Helfand, David J.
Archival data have been combined with recent observations of the Galactic plane using the Very Large Array to create new catalogs of compact centimetric radio sources. The 20 cm source catalog covers...
Oguri, Masamune, Inada, Naohisa, Hennawi, Joseph F., Richards, Gordon T., Johnston, David E., Frieman, Joshua A., ...
We report the discovery of two doubly imaged quasars, SDSS J100128.61+502756.9 and SDSS J120629.65+433217.6, at redshifts of 1.838 and 1.789, and with image separations of 2.86" and 2.90",...
Dennis J. Nielsen, Ed. D, Senior Scholar, Robert H. Becker
This project was supported by funds made available from The South Carolina State Housing
Oguri, Masamune, Inada, Naohisa, Hennawi, Joseph F., Richards, Gordon T., Johnston, David E., Frieman, Joshua A., ...
We report the discovery of two doubly-imaged quasars, SDSS J100128.61+502756.9 and SDSS J120629.65+433217.6, at redshifts of 1.838 and 1.789 and with image separations of 2.86'' and 2.90'',...
White, Richard L., Becker, Robert H., Fan, Xiaohui, Strauss, Michael A.
The Hubble Advanced Camera for Surveys has been used to obtain a narrow-band image of the weak emission peak seen at lambda=7205 A in the Gunn-Peterson Ly beta absorption trough of the highest...
A New Catalog of Radio Compact HII Regions in the Milky Way (2004)
Giveon, Uriel, Becker, Robert H., Helfand, David J., White, Richard L.
We utilize new VLA Galactic plane catalogs at 5 and 1.4 GHz covering the first Galactic quadrant (350
Glikman, Eilat, Gregg, Michael D., Lacy, Mark, Helfand, David J., Becker, Robert H., White, Richard L.
We have constructed a sample of bright near-infrared sources which are detected at radio wavelengths but undetected on the POSS I plates in order to search for a population of dust-obscured quasars....
Microlensing of the Broad Emission Line Region in the Quadruple Lens SDSS J1004+4112 (2004)
Richards, Gordon T., Keeton, Charles R., Pindor, Bartosz, Hennawi, Joseph F., Hall, Patrick B., Turner, Edwin L., ...
We present seven epochs of spectroscopy on the quadruply imaged quasar SDSS J1004+4112, spanning observed-frame time delays from 1 to 322 days. The spectra reveal differences in the emission lines...
Oguri, Masamune, Inada, Naohisa, Keeton, Charles R., Pindor, Bartosz, Hennawi, Joseph F., Gregg, Michael D., ...
We study the recently discovered gravitational lens SDSS J1004+4112, the first quasar lensed by a cluster of galaxies. It consists of four images with a maximum separation of 14.62". The system was...
SDSS J115517.35+634622.0: A Newly Discovered Gravitationally Lensed Quasar (2003)
Pindor, Bart, Eisenstein, Daniel J., Inada, Naohisa, Gregg, Michael D., Becker, Robert H., Brinkmann, Jon, ...
We report the discovery of SDSSJ115517.35+634622.0, a previously unknown gravitationally lensed quasar. The lens system exhibits two images of a $z = 2.89$ quasar, with an image separation of...
SDSS J1335+0118: A New Two-Image Gravitational Lens (2003)
Oguri, Masamune, Inada, Naohisa, Castander, Francisco J., Gregg, Michael D., Becker, Robert H., Ichikawa, Shin-Ichi, ...
We report the discovery of the two-image gravitationally lensed quasar SDSS J1335+0118. The object was selected as a lens candidate from the Sloan Digital Sky Survey. The imaging and spectroscopic...
Lacy, Mark, Becker, Robert H., Storrie-Lombardi, Lisa J., Gregg, Michael D., Urrutia, Tanya, White, Richard L., ...
We have identified galaxies near two quasars which are at the redshift of damped Lyman-alpha (DLA) systems in the UV spectra of the quasars. Both galaxies are actively forming stars. One galaxy has a...
SDSS J0903+5028: A New Gravitational Lens (2003)
Johnston, David E., Richards, Gordon T., Frieman, Joshua A., Keeton, Charles R., Strauss, Michael A., Becker, Robert H., ...
We report the discovery of a new gravitationally lensed quasar from the Sloan Digital Sky Survey, SDSS J090334.92+502819.2. This object was targeted for SDSS spectroscopy as a Luminous Red Galaxy...
Inada, Naohisa, Becker, Robert H., Burles, Scott, Castander, Francisco J., Eisenstein, Daniel, Hall, Patrick B., ...
We report the discovery of a new gravitationally lensed quasar from the Sloan Digital Sky Survey, SDSS J092455.87+021924.9 (SDSS J0924+0219). This object was selected from among known SDSS quasars by...
White, Richard L., Helfand, David J., Becker, Robert H., Gregg, Michael D., Postman, Marc, Lauer, Tod R., ...
We present a new sample of 35 quasars selected from the FIRST radio survey and the Deeprange I-band survey (Postman et al. 1998, 2002). A comparison with the FIRST Bright Quasar survey samples...
Probing the Ionization State of the Universe at z>6 (2003)
White, Richard L., Becker, Robert H., Fan, Xiaohui, Strauss, Michael A.
We present high signal-to-noise ratio Keck ESI spectra of the two quasars known to have Gunn-Peterson absorption troughs, SDSS J1030+0524 (z=6.28) and SDSS J1148+5251 (z=6.37). The Ly alpha and Ly...
Fan, Xiaohui, Strauss, Michael A., Schneider, Donald P., Becker, Robert H., White, Richard L., Haiman, Zoltan, ...
We present the discovery of three new quasars at z>6 in 1300 deg^2 of SDSS imaging data, J114816.64+525150.3 (z=6.43), J104845.05+463718.3 (z=6.23) and J163033.90+401209.6 (z=6.05). The first two...
A pulsed-accelerated-flow (PAF) spectrometer (model V) capable of non-ambient temperature studies of fast reaction kinetics is constructed and used for collection of kinetic data. The instrument is...
A gravitationally lensed quasar with quadruple images separated by 14.62arcseconds (2003)
Inada, Naohisa, Oguri, Masamune, Pindor, Bartosz, Hennawi, Joseph F., Chiu, Kuenley, Zheng, Wei, ...
Gravitational lensing is a powerful tool for the study of the distribution of dark matter in the Universe. The cold-dark-matter model of the formation of large-scale structures (that is, clusters of...
Blanton, Elizabeth L., Gregg, Michael D., Helfand, David J., Becker, Robert H., White, Richard L.
Using a combination of near-infrared and optical photometry, along with multi-object spectroscopy, we have confirmed the existence of a high-redshift cluster of galxies at z = 0.96. The cluster was...
FIRST J102347.6+003841: The First Radio-Selected Cataclysmic Variable (2002)
Bond, Howard E., White, Richard L., Becker, Robert H., O'Brien, M. Sean
We have identified the 1.4 GHz radio source FIRST J102347.6+003841 (hereafter FIRST J1023+0038) with a previously unknown 17th-mag Galactic cataclysmic variable (CV). The optical spectrum resembles...
The Twice-Overlooked, Second FR II Broad Absorption Line Quasar LBQS 1138-0126 (2002)
Brotherton, Michael S., Croom, Scott M., De Breuck, Carlos, Becker, Robert H., Gregg, Michael D.
We report the correct classification of an overlooked Fanaroff-Riley class II radio-loud quasar with broad absorption lines, only the second such object so identified. The rare properties of this...
An FeLoBAL Binary Quasar (2002)
Gregg, Michael D., Becker, Robert H., White, Richard L., Richards, Gordon T., Chaffee, Fred H., Fan, Xiaohui
In an ongoing infrared imaging survey of quasars at Keck Observatory, we have discovered that the z=1.285 quasar SDSS J233646.2-010732.6 comprises two point sources with a separation of 1.67"....
FIRST 0747+2739: A FIRST/2MASS Quasar with an Overabundance of C IV Absorption Systems (2002)
Richards, Gordon T., Gregg, Michael D., Becker, Robert H., White, Richard L.
We present a Keck ESI spectrum of FIRST 074711.2+273904, a K=15.4 quasar with redshift 4.11 that is detected by both FIRST and 2MASS. The spectrum contains at least 14 independent C IV absorption...
Ivezic, Zeljko, Menou, Kristen, Knapp, Gillian R., Strauss, Michael A., Lupton, Robert H., Vanden Berk, Daniel E., ...
We discuss the optical and radio properties of similar to30,000 FIRST (radio, 20 cm, sensitive to 1 mJy) sources positionally associated within 1."5 with a Sloan Digital Sky Survey (SDSS) (optical,...
z ~ 6 Quasars from the SDSS: Probing the End of the Dark Ages (2002)
Fan, Xiaohui, Narayanan, Vijay K., Strauss, Michael A., Lupton, Robert H., Becker, Robert H., White, Richard L., ...
Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey (2002)
Hall, Patrick B., Anderson, Scott F., Strauss, Michael A., York, Donald G., Richards, Gordon T., Fan, Xiaohui, ...
Fan, Xiaohui, Narayanan, Vijay K., Strauss, Michael A., White, Richard L., Becker, Robert H., Pentericci, Laura, ...
We study the process of cosmic reionization and estimate the ionizing background in the IGM using the Lyman series absorption in the spectra of the four quasars at 5.7
Optical Counterparts for 70,000 Radio Sources: APM Identifications for the FIRST Radio Survey (2001)
McMahon, Richard G., White, Richard L., Helfand, David J., Becker, Robert H.
We describe a program to identify optical counterparts to radio sources from the VLA FIRST survey using the Cambridge APM scans of the POSS-I plates. We use radio observations covering 4150 square...
Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar (2001)
Becker, Robert H., Fan, Xiaohui, White, Richard L., Strauss, Michael A., Narayanan, Vijay K., Lupton, Robert H., ...
We present moderate resolution Keck spectroscopy of quasars at z=5.82, 5.99 and 6.28, discovered by the Sloan Digital Sky Survey (SDSS). We find that the Ly Alpha absorption in the spectra of these...
Fan, Xiaohui, Narayanan, Vijay K., Lupton, Robert H., Strauss, Michael A., Knapp, Gillian R., Becker, Robert H., ...
We present the results from a survey of i-dropout objects selected from ~1550 deg^2 of multicolor imaging data from the Sloan Digital Sky Survey, to search for luminous quasars at z>5.8. Objects with...
Gregg, Michael D., Lacy, Mark, White, Richard L., Glikman, Eilat, Helfand, David, Becker, Robert H., ...
In a survey of quasar candidates selected by matching the FIRST and 2MASS catalogs, we have found two extraordinarily red quasars. FIRST J013435.7-093102 is a 1 Jy source at z=2.216 and has B-K > 10,...
The FIRST Bright Quasar Survey III. The South Galactic Cap (2001)
Becker, Robert H., White, Richard L., Gregg, Michael D., Laurent-Muehleisen, Sally A., Brotherton, Michael S., Impey, Chris D., ...
We present the results of an extension of the FIRST Bright Quasar Survey (FBQS) to the South Galactic cap, and to a fainter optical magnitude limit. Radio source counterparts with SERC R magnitudes...
Quasar Absorption Lines as a Function of Quasar Orientation Measures (2001)
Richards, Gordon T., Laurent-Muehleisen, S. A., Becker, Robert H., York, Donald G.
We present high resolution radio data at 3.5 and 20 cm from the VLA in the A configuration for 144 quasars with known CIV absorption line properties. Using these measurements, we compare and contrast...
Long-term Optical Variability of Radio-Selected Quasars from the FIRST Survey (2000)
Helfand, David J., Stone, Remington P. S., Willman, Beth, White, Richard L., Becker, Robert H., Price, Trevor, ...
We have obtained single-epoch optical photometry for 201 quasars, taken from the FIRST Bright Quasar Survey, which span a wide range in radio loudness. Comparison with the magnitudes of these objects...
The Gravitational Lens Candidate FBQ 1633+3134 (2000)
Morgan, Nicholas D., Becker, Robert H., Gregg, Michael D., Schechter, Paul L., White, Richard L.
We present our ground-based optical imaging, spectral analysis, and high resolution radio mapping of the gravitational lens candidate FBQ 1633+3134. This z=1.52, B=17.7 quasar appears double on CCD...
Keck Hires Observations of the QSO First J104459.6+365605: Evidence for a Large Scale Outflow (2000)
De Kool, Martijn, Arav, Nahum, Becker, Robert H., Gregg, Michael D., White, Richard L., Laurent-Muehleisen, Sally A., ...
This paper presents an analysis of a Keck HIRES spectrum of the QSO FIRST J104459.6+365605. The line of sight towards the QSO contains two clusters of outflowing clouds that give rise to broad blue...
The Intrinsic Absorber in QSO 2359-1241: Keck and HST Observations (2000)
Arav, Nahum, Brotherton, Michael S., Becker, Robert H., Gregg, Michael D., White, Richard L., Price, Trevor, ...
We present detailed analyses of the absorption spectrum seen in QSO 2359-1241 (NVSS J235953-124148). Keck HIRES data reveal absorption from twenty transitions arising from: He I, Mg I, Mg II, Ca II,...
Discovery of a Classic FR-II Broad Absorption Line Quasar from the FIRST Survey (2000)
Gregg, Michael D., Becker, Robert H., Brotherton, Michael S., Laurent-Muehleisen, Sally A., Lacy, Mark, White, Richard L.
We have discovered a remarkable quasar, FIRST J101614.3+520916, whose optical spectrum shows unambiguous broad absorption features while its double-lobed radio morphology and luminosity clearly...
What Determines the Depth of BALs? Keck HIRES Observations of BALQSO 1603+300 (1999)
Arav, Nahum, Becker, Robert H., Laurent-Muehleisen, Sally A., Gregg, Michael D., White, Richard L., De Kool, Martijn
We find that the depth and shape of the broad absorption lines (BALs) in BALQSO 1603+3002 are determined largely by the fraction of the emitting source which is covered by the BAL flow. In addition,...
Brotherton, M. S., Van Breugel, Wil, Smith, R. J., Boyle, B. J., Shanks, T., Croom, S. M., ...
We report the discovery of five broad-absorption-line (BAL) QSOs in a complete sample of 111 ultraviolet excess (UVX) QSO candidates also detected in the NRAO VLA Sky Survey. All five BAL QSOs, which...
Spectroscopy of the Extended Emission Associated with Two High-z Quasars (1997)
Lehnert, Matthew D., Becker, Robert H.
We present spectra taken with the Low Resolution Imaging Spectrograph on the Keck 10m telescope of spatially-resolved structures ("fuzz") around the high-redshift radio-loud quasars PKS 0445+097...
The First FIRST Gravitationally Lensed Quasar: FBQ 0951+2635 (1997)
Schechter, Paul L., Gregg, Michael D., Becker, Robert H., Helfand, David J., White, Richard L.
The V=16.9 quasar FBQ 0951+2635 at redshift z=1.24 appears double on CCD exposures taken in subarcsecond seeing. The two objects are separated by 1.1" and differ in brightness by 0.9 mag. VLA...
Buchalter, Ari, Helfand, David J., Becker, Robert H., White, Richard L.
In previous attempts to measure Omega_0 from the angular size-redshift (theta-z) relation of double-lobed radio sources, the observed data have been consistent with a static Euclidean universe,...
Radio Observations of 4079 Quasars (1997)
Bischof, Otto B., Becker, Robert H.
Using the NVSS radio catalog, we have searched for radio emission from 4079 quasars taken from the 1996 version of the Veron-Cetty and Veron (1996) quasar catalog. The comparison resulted in the...
Becker, Robert H., Gregg, Michael D., Hook, Isobel M., McMahon, Richard G., White, Richard L., Helfand, David J.
We have discovered two low-ionization broad absorption line quasars in programs to obtain optical spectra for radio-selected quasar candidates from the VLA FIRST Survey (Becker, White, & Helfand...
The FIRST Bright QSO Survey (1996)
Gregg, Michael D., Becker, Robert H., White, Richard L., Helfand, David J., McMahon, Richard G., Hook, Isobel M.
The FIRST Radio Survey provides a new resource for constructing a large quasar sample. With source positions accurate to better than 1\arcsec\ and a point source sensitivity limit of 1 mJy, it...
The condensation of the aminophenols with maleic anhydride /--by Robert H. Becker. (1956)
Thesis (M.S.)--South Dakota State University, 1956.