LOFAR long baselines at 140MHz Calibrators

DOI

An efficient means of locating calibrator sources for international LOw Frequency ARray (LOFAR) is developed and used to determine the average density of usable calibrator sources on the sky for subarcsecond observations at 140MHz. We used the multi-beaming capability of LOFAR to conduct a fast and computationally inexpensive survey with the full international LOFAR array. Sources were preselected on the basis of 325MHz arcminute-scale flux density using existing catalogues. By observing 30 different sources in each of the 12 sets of pointings per hour, we were able to inspect 630 sources in two hours to determine if they possess a sufficiently bright compact component to be usable as LOFAR delay calibrators.

Cone search capability for table J/A+A/574/A73/lofarlb (LOFAR sources observed)

Identifier
DOI http://doi.org/10.26093/cds/vizier.35740073
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/574/A73
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/574/A73
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/574/A73
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/574/A73
Provenance
Creator Moldon J.; Deller A.T.; Wucknitz O.; Jackson N.; Drabent A.; Carozzi T.,Conway J.; Kapinska A.D.; McKean J.P.; Morabito L.; Varenius E.; Zarka P.,Anderson J.; Asgekar A.; Avruch I.M.; Bell M.E.; Bentum M.J.; Bernardi G.,Best P.; Birzan L.; Bregman J.; Breitling F.; Broderick J.W.; Bruggen M.,Butcher H.R.; Carbone D.; Ciardi B.; de Gasperin F.; de Geus E.; Duscha S.,Eislooffel J.; Engels D.; Falcke H.; Fallows R.A.; Fender R.; Ferrari C.,Frieswijk W.; Garrett M.A.; Griessmeier J.; Gunst A.W.; Hamaker J.P.,Hassall T.E.; Heald G.; Hoeft M.; Juette E.; Karastergiou A.,Kondratiev V.I.; Kramer M.; Kuniyoshi M.; Kuper G.; Maat P.; Mann G.,Markoff S.; McFadden R.; McKay-Bukowski D.; Morganti R.; Munk H.,Norden M.J.; Offringa A.R.; Orru E.; Paas H.; Pandey-Pommier M.; Pizzo R.,Polatidis A.G.; Reich W.; Roottgering H.; Rowlinson A.; Scaife A.M.M.,Schwarz D.; Sluman J.; Smirnov O.; Stappers B.W.; Steinmetz M.; Tagger M.,Tang Y.; Tasse C.; Thoudam S.; Toribio M.C.; Vermeulen R.; Vocks C.,van Weeren R.J.; White S.; Wise M.W.; Yatawatta S.; Zensus A.
Publisher CDS
Publication Year 2015
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Interstellar medium; Natural Sciences; Observational Astronomy; Physics