Róbert Brunner
A5043454829- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Astronomical Observations and Instrumentation
- Optical Coatings and Gratings
- Stellar, planetary, and galactic studies
- Photonic and Optical Devices
- Gamma-ray bursts and supernovae
- Silicon Nanostructures and Photoluminescence
- Thin-Film Transistor Technologies
- Semiconductor materials and devices
- Near-Field Optical Microscopy
- Silicon and Solar Cell Technologies
- Advanced optical system design
- Integrated Circuits and Semiconductor Failure Analysis
- Adaptive optics and wavefront sensing
- Photonic Crystals and Applications
- Astrophysical Phenomena and Observations
- Remote Sensing in Agriculture
- Surface Roughness and Optical Measurements
- Scientific Computing and Data Management
- Optical Polarization and Ellipsometry
- Cosmology and Gravitation Theories
- Advancements in Photolithography Techniques
- Force Microscopy Techniques and Applications
- Parallel Computing and Optimization Techniques
Carl Zeiss (Germany)
2013-2025
Fraunhofer Institute for Applied Optics and Precision Engineering
2017-2025
Ernst Abbe University of Applied Sciences Jena
2015-2024
Ericsson (Italy)
2024
Ericsson (Canada)
2016-2021
TransCanada (Canada)
2021
International University of the Caribbean
2020
University of Pennsylvania
2020
University of Illinois Urbana-Champaign
2006-2019
Czech Academy of Sciences, Institute of Physics
2008-2019
The Sloan Digital Sky Survey (SDSS) will provide the data to support detailed investigations of distribution luminous and nonluminous matter in universe: a photometrically astrometrically calibrated digital imaging survey π sr above about Galactic latitude 30° five broad optical bands depth g' ∼ 23 mag, spectroscopic approximately 106 brightest galaxies 105 quasars found photometric object catalog produced by survey. This paper summarizes observational parameters products SDSS serves as an...
We have created a variety of composite quasar spectra using homogeneous data set over 2200 from the Sloan Digital Sky Survey (SDSS). The sample spans redshift range 0.044 ≤ z 4.789 and an absolute r' magnitude -18.0 to -26.5. input cover observed wavelength 3800–9200 Å at resolution 1800. median covers rest-wavelength 800 8555 reaches peak signal-to-noise ratio 300 per 1 element in rest frame. identified 80 emission-line features spectrum. Emission-line shifts relative nominal laboratory...
We study the optical colors of 147,920 galaxies brighter than g* = 21, observed in five bands by Sloan Digital Sky Survey (SDSS) over ∼100 deg2 high Galactic latitude sky along celestial equator. The distribution g*-r* versus u*-g* color-color diagram is strongly bimodal, with an optimal color separator u*-r* 2.22. use visual morphology and spectral classification subsamples 287 500 galaxies, respectively, to show that two peaks correspond roughly early- (E, S0, Sa) late-type (Sb, Sc, Irr)...
A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of exciting science opportunities next decade. The Large Synoptic Survey Telescope (LSST) have an effective aperture 6.7 meters and imaging camera field view 9.6 deg^2, be devoted ten-year 20,000 deg^2 south +15 deg. Each pointing imaged 2000 times fifteen second exposures six broad from 0.35 1.1 microns, total point-source depth r~27.5. LSST Science Book describes basic...
The Sloan Digital Sky Survey has validated and made publicly available its First Data Release. This consists of 2099 square degrees five-band (u, g, r, i, z) imaging data, 186,240 spectra galaxies, quasars, stars calibrating blank sky patches selected over 1360 this area, tables measured parameters from these data. data go to a depth r ~ 22.6 are photometrically astrometrically calibrated 2% rms 100 milli-arcsec per coordinate, respectively. cover the range 3800--9200 A, with resolution...
This paper describes the Third Data Release of Sloan Digital Sky Survey (SDSS). release, containing data taken up through 2003 June, includes imaging in five bands over 5282 deg2, photometric and astrometric catalogs 141 million objects detected these data, spectra 528,640 selected 4188 deg2. The pipelines analyzing both images spectroscopy are unchanged from those used our Second Release.
In the course of its commissioning observations, Sloan Digital Sky Survey (SDSS) has produced one largest redshift samples galaxies selected from CCD images. Using 11,275 complete to r* = 17.6 over 140 deg2, we compute luminosity function in band a range -23 < M -16 (for h 1). The result is well-described by Schechter with parameters ϕ* (1.46 ± 0.12) × 10-2 h3 Mpc-3, M* -20.83 0.03, and α -1.20 0.03. implied density j ≈ (2.6 0.3) 108h L⊙ Mpc-3. We find that surface brightness selection...
We present the fourth edition of Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog contains 77,429 objects; this is an increase over 30,000 entries since previous edition. consists objects in SDSS Fifth Data Release that have luminosities larger than Mi = -22.0 (in a cosmology with H0 70 km s-1 Mpc-1, ΩM 0.3, and ΩΛ 0.7), at least one emission line FWHM 1000 or interesting/complex absorption features, are fainter i ≈ 15.0, highly reliable redshifts. area covered by ≈5740 deg2....
We present a catalog of 1,172,157 quasar candidates selected from the photometric imaging data Sloan Digital Sky Survey (SDSS). The objects are all point sources to limiting magnitude i = 21.3 8417 deg2 SDSS Data Release 6 (DR6). This sample extends our previous by using latest public release and probing both ultraviolet (UV)-excess high-redshift quasars. While addition reduces overall efficiency (quasars:quasar candidates) ∼80%, it is expected contain no fewer than 850,000 bona fide...
The success of deep learning in visual recognition tasks has driven advancements multiple fields research. Particularly, increasing attention been drawn towards its application agriculture. Nevertheless, while pattern on farmlands carries enormous economic values, little progress made to merge computer vision and crop sciences due the lack suitable agricultural image datasets. Meanwhile, problems agriculture also pose new challenges vision. For example, semantic segmentation aerial farmland...
The Hubble Deep Field (HDF) is the deepest set of multicolor optical photometric observations ever undertaken, and offers a valuable data with which to study galaxy evolution. Combining WFPC2 ground-based near-infrared photometry, we derive photometrically estimated redshifts for HDF galaxies J<23.5. We demonstrate that incorporating reduces uncertainty in by approximately 40% required remove systematic uncertainties within redshift range 1 2, bridge gap between those two samples. overall...
This is the fourth paper in a series aimed at finding high-redshift quasars from five-color imaging data taken along Celestial Equator by SDSS. during its commissioning phase. In this paper, we use color-selected sample of 39 luminous presented Paper III to derive evolution quasar luminosity function over range 3.6
The Sloan Digital Sky Survey has confirmed the existence of populations broad absorption line (BAL) quasars with various unusual properties. We present and discuss twenty-three such objects consider implications their wide range properties for models BAL outflows in general. have discovered one quasar a record number lines. Two other similarly complex many narrow troughs show MgII extending longward systemic host galaxy redshifts. This can be explained as an extended continuum source by...
We measure the power spectrum, PF(k, z), of transmitted flux in Lyα forest using 3035 high-redshift quasar spectra from Sloan Digital Sky Survey. This sample is almost 2 orders magnitude larger than any previously available data set, yielding statistical errors ~0.6% and ~0.005 on, respectively, overall amplitude logarithmic slope z). unprecedented requires a correspondingly careful analysis possible systematic contaminations it. For this purpose we reanalyze raw to make use information not...
We present observations of SDSSp J104433.04-012502.2, a luminous quasar at z = 5.80 discovered from Sloan Digital Sky Survey (SDSS) multicolor imaging data. This object was selected as an i'-band dropout object, with i* 21.8 ± 0.2 and z* 19.2 0.1. It has absolute magnitude M1450 -27.2 (H0 50 km s-1 Mpc-1, q0 0.5). The spectrum shows strong broad Lyα emission line, forest absorption lines mean continuum decrement DA 0.91 Lyman limit system 5.72. also O I Si IV similar to those quasars ≲ 5,...
We present bright galaxy number counts in five broad bands (u', g', r', i', z') from imaging data taken during the commissioning phase of Sloan Digital Sky Survey (SDSS). The are derived two independent stripes scans along celestial equator, one each toward northern and southern Galactic cap, covering about 230 210 deg2, respectively. A careful study is made to verify reliability photometric catalog. For galaxies brighter than r* = 16, catalog produced by automated software examined against...
We have compiled a large sample of low-redshift active galactic nuclei (AGN) identified via their emission line characteristics from the spectroscopic data Sloan Digital Sky Survey. Since lines are often contaminated by stellar absorption lines, we developed an objective and efficient method subtracting continuum every galaxy spectrum before making measurements. The distribution measured H$\alpha$ Full Width at Half Maxima values galaxies is strongly bimodal, with two populations separated...
Using a homogenous sample of 38,208 quasars with sky coverage ∼4000 deg2 drawn from the Sloan Digital Sky Survey Data Release Five quasar catalog, we study dependence clustering on luminosity, virial black hole (BH) mass, color, and radio loudness. At z < 2.5, depends weakly luminosity BH typical uncertainty levels ∼10% for measured correlation lengths. These weak dependences are consistent models in which substantial scatter between host dark matter halo mass has diluted any difference,...
We present an empirical investigation of the colors quasars in Sloan Digital Sky Survey (SDSS) photometric system. The sample studied includes 2625 with SDSS photometry: 1759 found during spectroscopic commissioning and follow-up observations on other telescopes, 50 matches to FIRST quasars, 573 from NASA Extragalactic Database, 243 two or more these sources. are distributed a 25 wide stripe centered celestial equator covering ∼529 deg2. Positions (accurate 02) magnitudes given for 898 known...
We present a catalog of 100,563 unresolved, UV-excess (UVX) quasar candidates to g=21 from 2099 deg^2 the Sloan Digital Sky Survey (SDSS) Data Release One (DR1) imaging data. Existing spectra 22,737 sources reveals that 22,191 (97.6%) are quasars; accounting for magnitude dependence this efficiency, we estimate 95,502 (95.0%) objects in quasars. Such high efficiency is unprecedented broad-band surveys This ``proof-of-concept'' sample designed be maximally efficient, but still has 94.7% completeness g
We report an innovative approach for the fabrication of highly light transmissive, antireflective optical interfaces. This is possible due to discovery that metallic nanoparticles may be used as a lithographic mask etch nonstraightforward structures into fused silica, which results in quasihexagonal pattern hollow, pillar-like protuberances. The far reaching performance these demonstrated by reflection and transmission measurements at oblique angles incidence over broad spectral region...
We present the second edition of Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists 16,713 objects in SDSS First Data Release that have luminosities larger than Mi = -22 (in a cosmology with H0 70 km s-1 Mpc-1, ΩM 0.3, and ΩΛ 0.7), at least one emission line FWHM 1000 s-1, highly reliable redshifts. area covered by is ≈1360 deg2. quasar redshifts range from 0.08 to 5.41, median value 1.43. For each object, presents positions accurate better 02 rms per coordinate, five-band...