Search results for "Catalogs"

Latvijas Universitātes tautsaimniecības un tiesību zinātņu fakultātes bibliotēkas sistēmatiskais katalogs, 2. sēj.

1938

Schlüssel zum systematischen Catalog der Dorpater Universitäts-Bibliothek [Schlüssel zum systematischen Catalog der Dorpater Universitätsbibliothek]

1873

Criterios para gestionar una política de adquisiciones: estudio estadístico del catálogo colectivo de publicaciones seriadas de la Universitat de Val…

1996

One of the most important topics in libraries management, specially nowadays when library budgets have been blocked or shortened, is to set up a suitable acquisitions policy. This article aims, from a particular experience, to supply some information that allow to fix such an acquisitions policy. It analyses the Valencia University Serials Catalog, taking into account its growth throughout time, changes in titles distribution by the publishing country, in libraries and collections, always relating the whole collection to the current one, to conclude with a view of the collection distribution in knowledge areas, taking into account the number of students.<br><br>Uno de los temas …

ASTEROIDS SEARCH RESULTS IN LARGE PHOTOGRAPHIC SKY SURVEYS

2017

Photographic observations of XX century contained numerous and varied information about all objects  and  events  of  the  Universe  fixed  on  plates.  The original and interesting observations of small bodies of the Solar  system  in  previous  years  can  be  selected  and  used for various scientific tasks. Existing databases and online services can help make such selection easily and quickly.  The observations of chronologically earlier ppositions, photometric  evaluation  of  brightness  for  long  periods  of time allow refining the orbits of asteroids and identifying various non-stationaries. Photographic observations of Northern Sky Survey project  and  observations  of  clusters  …

ON THE CONCEPT OF THE ENHANCED FON CATALOG COMPILATION

2017

We suppose to compile the enhanced version of FON (Photographic Survey of the Northern Sky) catalog of stellar positions and B-magnitudes in the sky region from -20 to 90 degrees on declination. The photographic base of the project comprises about 5,700 plates obtained at three observatories of the former SU MAO NAS of Ukraine, Kitab observatoryof Uzbekistan and Gissar observatory of Tajikistan. The mean epoch of the catalog is around 1988. The expected limited stellar magnitude is 17.5m. More than 5,400 plates are processed to support the photometric part of the catalog. The plates were shot on the 1.2 m Schmidt telescope in Baldone, Latvia, in the U and V bands. Color data provide the pos…

Rich clusters from SDSS DR8

2012

The study of the properties of galaxy clusters and their environment gives us information about the formation and evolution of galaxies, groups and clusters, and larger structures - superclusters of galaxies and the whole cosmic web. We study the relations between the multimodality of galaxy clusters drawn from the SDSS DR8 and the environment where they reside. As cluster environment we consider the global luminosity density field, supercluster membership, and supercluster morphology.

Baryon Acoustic Oscillations in LRGs

2012

Baryon Acoustic Oscillations (BAO) have been previously detected using correlation functions and power spectra of the galaxy distribution. In this work, we present a new method for the detection of the real-space structures associated with this feature. These baryon acoustic structures are spherical shells with a relatively small density contrast, surrounding high density central regions. We design a specific wavelet adapted to the search for shells, and exploit the physics of the process by making use of two different mass tracers, introducing a specific statistic to detect the BAO features. We apply our method to the detection of BAO in a galaxy sample drawn from the Sloan Digital Sky Sur…

REFLEX galaxies redshifts

2009

We present the final data from the spectroscopic survey of the ROSAT-ESO Flux-Limited X-ray (REFLEX) catalogue of galaxy clusters. The REFLEX survey covers 4.24 steradians (34% of the entire sky) below a declination +2.50{deg} and at high galactic latitude (|b|<20{deg}). The full survey includes 447 galaxy clusters with a median redshift of 0.08 and is better than 90% complete to a limiting flux of f_X_=3x10^-12^ergs/s/cm^2^ (3fW/m^2^, 0.1 to 2.4keV), representing the largest statistically homogeneous sample of clusters to date drawn from the ROSAT All-Sky Survey (RASS). Here we describe the details of the spectroscopic observations carried out at the ESO 1.5m, 2.2m and 3.6m telescopes, the…