Building the 'JMMC Stellar Diameters Catalog' using SearchCal

Sylvain Lafrasse (1) , Guillaume Mella (1) , Daniel Bonneau (2) , Gilles Duvert (1) , Xavier Delfosse (1) , Olivier Chesneau (2) , Alain Chelli (1)

1 LAOG - Laboratoire d'Astrophysique de Grenoble
2 FIZEAU - Laboratoire Hippolyte Fizeau

The JMMC Calibrator Workgroup has long developed methods to ascertain the angular diameter of stars, and provides this expertise in the SearchCal software. SearchCal dynamically finds calibrators near science objects by querying CDS hosted catalogs according to observational parameters. Initially limited to bright objects (K magnitude ≤ 5.5), it has been upgraded with a new method providing calibrators without any magnitude limit but those of queried catalogs. We introduce here a new static catalog of stellar diameters, containing more than 38000 entries, obtained from SearchCal results aggregation on the whole celestial sphere, complete for all stars with HIPPARCOS parallaxes. We detail the methods and tools used to produce and study this catalog, and compare the static catalog approach with the dynamical querying provided by SearchCal engine. We also introduce a new Virtual Observatory service, enabling the reporting of, and querying about, stars flagged as "bad calibrators" by astronomers, adding this ever-growing database to our SearchCal service.

Mots clés: JMMC; SearchCal; optical interferometry; calibrator; star diameter; virtual observatory

Domaines: Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]; Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]

Sylvain Lafrasse, Guillaume Mella, Daniel Bonneau, Gilles Duvert, Xavier Delfosse, et al.. Building the 'JMMC Stellar Diameters Catalog' using SearchCal. 2010. ⟨hal-00512812⟩