L.F. Olsen

ESO Imaging Survey. VII. Distant cluster candidates over 12 square degrees

In this paper the list of candidate clusters identified from the I -band images of the ESO Imaging Survey (EIS) is completed using the data obtained over a total area of about 12 square degrees (EIS Patchesxa0C and D). 248 new cluster candidates are presented. Together with the data reported earlier the total I -band coverage of EIS is 17 square degrees, which has yielded a sample of 302 cluster candidates with estimated redshift in the range and a median redshift of . This is the largest optically-selected sample currently available in the Southern Hemisphere. It is also well distributed in the sky thus providing targets for a variety of VLT programs nearly year round.

ESO Imaging Survey - The stellar catalogue in the Chandra deep field south

Stellar catalogues in five passbands ( UBVRI ) over an area of approximately 0.3xa0deg 2 , comprising about 1200xa0objects, and in seven passbands ( UBVRIJK ) over approximately 0.1xa0deg 2 , comprising about 400 objects, in the direction of the Chandra Deep Field South are presented. The 90% completeness level of the number counts is reached at approximately U = 23.8, B xa0= 24.0, V = 23.5, R = 23.0, I = 21.0, J = 20.5, K = 19.0. These multi-band catalogues have been produced from publicly available, single passband catalogues. A scheme is presented to select point sources from these catalogues, by combining the SExtractor parameter class_staru2000from all available passbands. Probable QSOs and unresolved galaxies are identified by using the previously developed

Optical observations of the dark Gamma-Ray Burst GRB 000210

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ESO Imaging Survey - IV. Multicolor analysis of point-like objects toward the South Galactic Pole

-technique (Hatziminaoglou et al. 2002), that fits the overall spectral energy distributions to template spectra and determines the best fitting template. Approximately 15% of true galaxies are misclassified as stars by the

INVESTIGATING HOT GAS IN THE HALOS OF TWO MASSIVE SPIRALS: OBSERVATIONS AND COSMOLOGICAL SIMULATIONS

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ESO imaging survey. II. Searching for distant clusters of galaxies

method.u2029The number of unresolved galaxies and QSOs identified by the

ESO Imaging Survey. Hubble Deep Field South: Optical-Infrared Observations, Data Reduction and Photometry

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VLT and NTT observations of two EIS cluster candidates. Detection of the early-type galaxies sequence at Z ~ 1

-technique, allows us to estimate that the remaining level of contamination by such objects is at the level of 2.4% of the number of stars. The fraction of missing stars being incorrectly removed as QSOs or unresolved galaxies is estimated to be similar. The observed number counts, colour-magnitude diagrams, colour-colour diagrams and colour distributions are presented and, to judge the quality of the data, compared to simulations based on the predictions of a Galactic Model convolved with the estimated completeness functions and the error model used to describe the photometric errors of the data. By identifying outliers in specific colour-colour diagrams between data and model the level of contamination by QSOs is alternatively estimated to be

ESO imaging survey. III. Multicolor data near the South Galactic Pole

la

ESO Imaging Survey IV. Exploring the EIS Multicolor Data

6.3% in the seven passband and