Results 41 to 50 of about 184,861 (296)
THE 2 Ms CHANDRA DEEP FIELD-NORTH SURVEY AND THE 250 Ks EXTENDED CHANDRA DEEP FIELD-SOUTH SURVEY: IMPROVED POINT-SOURCE CATALOGS [PDF]
, 2016 We present improved point-source catalogs for the 2 Ms Chandra Deep Field-North (CDF-N) and the 250 ks Extended Chandra Deep Field-South (E-CDF-S) Surveys, implementing a number of recent improvements in Chandra source-cataloging methodology. For CDF-N/E-
Yongquan Xue +10 more
semanticscholar +1 more source
Spitzer Matching Survey of the UltraVISTA Ultra-deep Stripes (SMUVS): Full-mission IRAC Mosaics and Catalogs [PDF]
Astrophysical Journal Supplement Series, 2018 This paper describes new deep 3.6 and 4.5 μm imaging of three UltraVISTA near-infrared survey stripes within the COSMOS field. The observations were carried out with Spitzer’s Infrared Array Camera (IRAC) for the Spitzer Matching Survey of the UltraVISTA
M. Ashby +26 more
semanticscholar +1 more source
Meet the family − the catalog of known hot subdwarf stars
Open Astronomy, 2017 In preparation for the upcoming all-sky data releases of the Gaia mission, we compiled a catalog of known hot subdwarf stars and candidates drawn from the literature and yet unpublished databases.
Geier Stephan +8 more
doaj +2 more sources
Artificial Star Test for Crowded Field CCD Photometry
Open Astronomy, 2015 A new method of performing an artificial star test (AST) for crowded field stellar CCD photometry is proposed. This AST method is superior in the cases when it is necessary to account for varying photometric quality across the study field, arising due to
Stonkutė R., Vansevičius V.
doaj +1 more source
Determination of Abundances of Chemical Elements in Open Star Clusters of the Galaxy
Open Astronomy, 2016 Spectroscopic determinations of the relative abundances of chemical elements produced in different nuclear-synthesis processes, [el/Fe], are collected for 90 open star clusters of the Galaxy using data from 109 papers published between 1991 and 2015 ...
Gozha M. L. +2 more
doaj +1 more source
Astronomical Surveys and Big Data
Open Astronomy, 2016 Recent all-sky and large-area astronomical surveys and their catalogued data over the whole range of electromagnetic spectrum, from γ-rays to radio waves, are reviewed, including such as Fermi-GLAST and INTEGRAL in γ-ray, ROSAT, XMM and Chandra in X-ray,
Mickaelian Areg M.
doaj +1 more source
A Catalog of Active Galactic Nuclei from the First 1.5 Gyr of the Universe
Frontiers in Astronomy and Space Sciences, 2017 Active galactic nuclei (AGN) are prominent astrophysical objects that can be observed throughout the whole Universe. To understand the underlying physical processes and the different appearance of AGN types, extensive samples are needed.
Krisztina Perger +3 more
doaj +1 more source
Tržište, 2020 Purpose – This research study aims to determine the influence of the factors of informativeness, entertainment, irritation, and credibility on the perception of the value of advertisements and the attitude to advertising through catalogs and store flyers
Damir Dobrinić
doaj +1 more source
Consolidation of the Gaia catalogue with Chinese Space Station Telescope astrometry
Frontiers in Astronomy and Space Sciences, 2022 The issue of preservation and improvement of the Gaia catalogue throughout the next few decades is addressed. The goal of this study is to evaluate the feasibility of astrometric parameter update, for objects already in the catalogue, by inclusion of new
M. Gai +6 more
doaj +1 more source
ON THE RELATIONSHIP OF UC H ii REGIONS AND CLASS II METHANOL MASERS. I. SOURCE CATALOGS [PDF]
, 2016 We conducted Very Large Array C-configuration observations to measure positions and luminosities of Galactic Class II 6.7 GHz methanol masers and their associated ultra-compact H ii regions.
Bo Hu +7 more
semanticscholar +1 more source