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A well constrained estimate of the distance remains one of the main factors to properly interpret the observations of accreting X-ray pulsars. Since these objects are typically well studied, multiple distance estimates obtained with…

High Energy Astrophysical Phenomena · Physics 2019-11-26 S. Treuz , V. Doroshenko , A. Santangelo , R. Staubert

Gaia is an all sky, high precision astrometric and photometric satellite of the European Space Agency (ESA) due for launch in 2010-2011. Its primary mission is to study the composition, formation and evolution of our Galaxy. Gaia will…

Astrophysics · Physics 2009-11-10 C. A. L. Bailer-Jones

We describe two ground based observing campaigns aimed at building a grid of approximately 200 spectrophotometric standard stars (SPSS), with an internal ~1% precision and tied to Vega within ~3%, for the absolute flux calibration of data…

We present a Bayesian method to cross-match 5,827,988 high proper motion Gaia sources ($\mu>40 \ mas \ yr^{-1}$) to various photometric surveys: 2MASS, AllWISE, GALEX, RAVE, SDSS and Pan-STARRS. To efficiently associate these objects across…

Solar and Stellar Astrophysics · Physics 2021-05-07 Ilija Medan , Sébastien Lépine , Zachary Hartman

Gaia data release 2 (DR2) provides the best non-rotating optical frame aligned with the radio frame (ICRF) thanks to the inclusion of about half-million quasars in the 5-parameter astrometric solution. Given their crucial diagnostic role…

Astrophysics of Galaxies · Physics 2018-10-25 Shilong Liao , Beatric Bucciarelli , Zhaoxiang Qi , Sufen Guo , Zihuang Cao , Zhenghong Tang

The latest Gaia data release in July 2022, DR3, added a number of important data products to those available in earlier releases, including radial velocity data, information on stellar multiplicity and XP spectra of a selected sample of…

Solar and Stellar Astrophysics · Physics 2023-09-01 O. Vincent , M. A. Barstow , S. Jordan , C. Mander , P. Bergeron , P. Dufour

The Gaia mission is reviewed together with the expected contents of the final catalogue. It is then argued that the ultimate goal of Galactic structure studies with Gaia astrometry should be to build a dynamical model of our galaxy which is…

Astrophysics · Physics 2009-11-13 Anthony G. A. Brown

The Gaia mission will provide the scientific community with high-quality observations of asteroids of all categories. The second release of Gaia data (DR2) was published in 2018 and consisted of 22 months of observations of 14,099 known…

Earth and Planetary Astrophysics · Physics 2021-04-28 Milagros Colazo , Rene Duffard , Walter Weidmann

We compared positions of the Gaia first data release (DR1) secondary data set at its faint limit with CCD positions of stars in 20 fields observed with the VLT/FORS2 camera. The FORS2 position uncertainties are smaller than one…

Instrumentation and Methods for Astrophysics · Physics 2017-10-25 P. F. Lazorenko , J. Sahlmann

The recent Gaia third data release (DR3) has brought some new exciting data about stellar binaries. It provides new opportunities to fully characterize more stellar systems and contribute to enforce our global knowledge of stars behaviour.…

Solar and Stellar Astrophysics · Physics 2023-10-04 S. Chevalier , C. Babusiaux , T. Merle , F. Arenou

GAIA present day (end-2002) photometric performances, estimated basing on the stellar populations crucial for understanding the formation and evolution of the Galaxy, are discussed. Performance of the GAIA photometric systems (PSs) is…

Astrophysics · Physics 2007-05-23 Vladas Vansevicius , Audrius Bridzius

Gaia DR3 photometry and BP/RP spectra have been widely used as reference in photometric calibrations. In this work, we check the spatial uniformity of Gaia DR3 photometry and BP/RP spectra by comparing the BP, RP and G bands photometry with…

Instrumentation and Methods for Astrophysics · Physics 2024-08-20 Bowen Huang , Haibo Yuan , Kai Xiao

CONTEXT. 2MASS is the reference survey in the NIR part of the spectrum given its whole-sky coverage, large dynamic range, and proven calibration uniformity. However, previous studies disagree in the value of the zero points (ZPs) for its…

Instrumentation and Methods for Astrophysics · Physics 2018-08-22 J. Maíz Apellániz , M. Pantaleoni González

We investigated the reliability of the genetic algorithm which will be used to invert the photometric measurements of asteroids collected by the European Space Agency Gaia mission. To do that, we performed several sets of simulations for 10…

Earth and Planetary Astrophysics · Physics 2015-06-24 T. Santana-Ros , P. Bartczak , T. Michałowski , P. Tanga , A. Cellino

A fast 2-dimensional image reconstruction method is presented, which takes as input 1-dimensional data acquired from scans across a central source in different orientations. The resultant reconstructed images do not show artefacts due to…

Instrumentation and Methods for Astrophysics · Physics 2011-07-04 D. L. Harrison

The large astrometric and photometric survey performed by the Gaia mission allows for a panoptic view of the Galactic disc and in its stellar cluster population. Hundreds of clusters were only discovered after the latest G data release…

The Gaia satellite will survey the entire celestial sphere down to 20th magnitude, obtaining astrometry, photometry, and low resolution spectrophotometry on one billion astronomical sources, plus radial velocities for over one hundred…

Context. We have compiled a catalogue of central stars of planetary nebulae (CSPN) with reliable distances and positions obtained from Gaia Data Release 2 (DR2) astrometry. Distances derived from parallaxes allow us to analyse the galactic…

Solar and Stellar Astrophysics · Physics 2020-09-22 I. González-Santamaría , M. Manteiga , A. Manchado , A. Ulla , C. Dafonte

Although a catalogue of synthetic RGB magnitudes, providing photometric data for a sample of 1346 bright stars, has been recently published, its usefulness is still limited due to the small number of reference stars available, considering…