SearchCal: a Virtual Observatory tool for searching calibrators in optical long-baseline interferometry II. The faint-object case

By D. Bonneau, X. Delfosse, D. Mourard, S. Lafrasse, G. Mella, S. Cétre, J. Clausse, G. Zins. 2006

163 citations recorded by the source corpus.

Context. In long-baseline interferometry, images or astrophysical parameters are obtained from the raw fringe contrast after a careful calibration process. We have already developed the software (SearchCal) to select suitable bright calibration stars (V ≤ 10; K ≤ 5.0) for obtaining the ultimate precision of current interferometric instruments like the VLTI. With the expected gain in sensitivity of AMBER and PRIMA on the VLTI, the need for fainter calibrators should now be adressed. Aims. We present a new version of SearchCal dedicated to the creation of an evolving catalog of stars suitable as calibrators with K magnitude >5 around the scientific target. Methods. Star catalogs available at the CDS are searched via web requests and provide the useful astrometric and photometric informations for selecting calibrators. The missing photometries are computed with an accuracy of about 0.1 mag. The stellar angular diameter is estimated with a precision of about 10% through newly determined surface-brightness versus color-index relations based on the I, J, H and K magnitudes. For each star the squared visibility is computed taking into account the central wavelength and the maximum baseline of the predicted observations. Results. The version of SearchCal for faint objects that allows to find calibrators for interferometric observations up to K ∼ 15 is available as a web service at the address: http://www.jmmc.fr/searchcal

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/8040877899274d8a46c13933e61d49f356579506

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Atomic and Molecular Physics, and Optics

In Instrumentation

Citations in the corpus

STELLAR DIAMETERS AND TEMPERATURES. III. MAIN-SEQUENCE A, F, G, AND K STARS: ADDITIONAL HIGH-PRECISION MEASUREMENTS AND EMPIRICAL RELATIONS (2013, methodology): “To choose an appropriate calibrator star in the vicinity of the science target, we used the SearchCal tool developed by the JMMC Working Group (Bonneau et al. 2006, 2011).”
VEGA: Visible spEctroGraph and polArimeter for the CHARA array: principle and performance (2009, methodology): “This research has made use of the SearchCal service of the Jean-Marie Mariotti Center1, and of CDS Astronomical Databases SIMBAD and VIZIER.”
An investigation of the close environment of β Cephei with the VEGA/CHARA interferometer (2010, methodology): “…performed using references stars HD 192907 and HD 214734 selected with the SearchCal4 software provided by the Jean-Marie Mariotti Center (JMMC), which gives computed photometric angular diameters ΦLD = 0.357± 0.025 mas for HD 192907 and ΦLD = 0.340 ± 0.023 mas for HD 214734 (Bonneau et al. 2006).”
SURVEYING THE BRIGHT STARS BY OPTICAL INTERFEROMETRY. I. A SEARCH FOR MULTIPLICITY AMONG STARS OF SPECTRAL TYPES F-K (2016, methodology): “However, this discrepancy can be accounted for by the difference in the surface brightness versus V−K relations of Mozurkewich et al. (2003) and Bonneau et al. (2006).”
Multiplicity of Galactic Cepheids from long-baseline interferometry – III. Sub-percent limits on the relative brightness of a close companion of δ Cephei (2016, methodology): “The calibrators, HD 206349 (θUD = 0.865±0.011 mas) and HD 214454 (θUD = 0.593±0.042 mas), were selected using the SearchCal1 software (Bonneau et al. 2006) provided by the Jean-Marie Mariotti Center2.”