Distance between Populations on the Basis of Attribute Data
SUMMARY Two new indices are presented for the measurement of distances between populations on the basis of attribute data. The intermediate variables used to obtain these indice...
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78 publications
Weak Lensing with Sloan Digital Sky Survey Commissioning Data: The Galaxy-Mass Correlation Function to 1 [CLC][ITAL]h[/ITAL][/CLC][TSUP]−1[/TSUP] M[CLC]pc[/CLC]
(abridged) We present measurements of galaxy-galaxy weak lensing from early commissioning imaging data from the Sloan Digital Sky Survey (SDSS). We measure a mean tangential she...
High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data
We present photometric and spectroscopic observations of 15 high-redshift quasars (z > 3.6) discovered from ~140 deg^2 of five-color (u'g'r'i'z') imaging data taken by the Sloan...
Nuclear cosmochronology within analytic models of the chemical evolution of the solar neighbourhood
This paper investigates whether the age of the Galaxy can be deduced from natural radioactivity. I demonstrate that two recent influential claims (by Butcher and by Fowler) that...
L Dwarfs Found in Sloan Digital Sky Survey Commissioning Imaging Data
This paper describes the discovery of seven dwarf objects of spectral type `L' (objects cooler than the latest M dwarfs) in commissioning imaging data taken by the Sloan Digital...
Astronomical CCD observing and reduction techniques
CCD instrumentation and techniques in observational astronomy are surveyed. The general topics addressed include: history of large array scientific CCD imagers; noise sources an...
The Hamburg/RASS Catalogue of optical identifications
\n We present the Hamburg/RASS Catalogue (HRC) of optical identifications of \nX-ray sources at high-galactic latitude. The HRC includes all X-ray sources \nfrom the ROSAT Brigh...
Stellar populations and surface brightness fluctuations: new observations and models
We examine the use of surface brightness fluctuations (SBF) for both stellar population and distance studies. New V-band SBF data are reported for five Fornax cluster galaxies a...
Star formation, metallicity and dust properties derived from the StromloAPM galaxy survey spectra
We have derived star formation rates (SFRs), gas-phase oxygen abundances and effective dust absorption optical depths for a sample of galaxies drawn from the Stromlo—APM redshif...