Pith. sign in

REVIEW 3 cited by

Gaia Early Data Release 3: The astrometric solution

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2012.03380 v1 pith:MLWKRWVK submitted 2020-12-06 astro-ph.IM

Gaia Early Data Release 3: The astrometric solution

L. Lindegren , S.A. Klioner , J. Hern\'andez , A. Bombrun , M. Ramos-Lerate , H. Steidelm\"uller , U. Bastian , M. Biermann
show 89 more authors
A. de Torres E. Gerlach R. Geyer T. Hilger D. Hobbs U. Lammers P.J. McMillan C.A. Stephenson J. Casta\~neda M. Davidson C. Fabricius G. Gracia-Abril J. Portell N. Rowell D. Teyssier F. Torra S. Bartolom\'e M. Clotet N. Garralda J.J. Gonz\'alez-Vidal J. Torra U. Abbas M. Altmann E. Anglada Varela L. Balaguer-N\'u\~nez Z. Balog C. Barache U. Becciani M. Bernet S. Bertone L. Bianchi S. Bouquillon A.G.A. Brown B. Bucciarelli D. Busonero A.G. Butkevich R. Buzzi R. Cancelliere T. Carlucci P. Charlot M.-R. L. Cioni M. Crosta C. Crowley E.F. del Peloso E. del Pozo R. Drimmel P. Esquej A. Fienga E. Fraile M. Gai M. Garcia-Reinaldos R. Guerra N.C. Hambly M. Hauser K. Jan{\ss}en S. Jordan Z. Kostrzewa-Rutkowska M.G. Lattanzi S. Liao E. Licata T.A. Lister W. L\"offler J.M. Marchant A. Masip F. Mignard A. Mints D. Molina A. Mora R. Morbidelli C.P. Murphy C. Pagani P. Panuzzo X. Pe\~nalosa Esteller E. Poggio P. Re Fiorentin A. Riva A. Sagrist\`a Sell\'es V. Sanchez Gimenez M. Sarasso E. Sciacca H.I. Siddiqui R.L. Smart D. Souami A. Spagna I.A. Steele F. Taris E. Utrilla W. van Reeven A. Vecchiato
This is my paper
classification astro-ph.IM
keywords gaiaastrometricsourcesdatasolutionsprocessingedr3million
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
read the original abstract

Gaia Early Data Release 3 (Gaia EDR3) contains results for 1.812 billion sources in the magnitude range G = 3 to 21 based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operational phase. We describe the input data, the models, and the processing used for the astrometric content of Gaia EDR3, as well as the validation of these results performed within the astrometry task. The processing broadly followed the same procedures as for Gaia DR2, but with significant improvements to the modelling of observations. For the first time in the Gaia data processing, colour-dependent calibrations of the line- and point-spread functions have been used for sources with well-determined colours from DR2. In the astrometric processing these sources obtained five-parameter solutions, whereas other sources were processed using a special calibration that allowed a pseudocolour to be estimated as the sixth astrometric parameter. Compared with DR2, the astrometric calibration models have been extended, and the spin-related distortion model includes a self-consistent determination of basic-angle variations, improving the global parallax zero point. Gaia EDR3 gives full astrometric data (positions at epoch J2016.0, parallaxes, and proper motions) for 1.468 billion sources (585 million with five-parameter solutions, 882 million with six parameters), and mean positions at J2016.0 for an additional 344 million. Solutions with five parameters are generally more accurate than six-parameter solutions, and are available for 93% of the sources brighter than G = 17 mag. The median uncertainty in parallax and annual proper motion is 0.02-0.03 mas at magnitude G = 9 to 14, and around 0.5 mas at G = 20. Extensive characterisation of the statistical properties of the solutions is provided, including the estimated angular power spectrum of parallax bias from the quasars.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Mitigating Charge Migration in JWST NIRISS Reveals That KELT-7 b is a Metal-enriched Ultra-hot Jupiter Orbiting a Young Metal-rich Star

    astro-ph.EP 2026-07 conditional novelty 7.0

    Correcting NIRISS charge migration reveals KELT-7 b as a metal-enriched (~92x solar) ultra-hot Jupiter with H2O, CO2 and TiO but no H- or clouds, orbiting a young metal-rich star.

  2. Unveiling the Milky Way with a Gaia DR3 census of OB-type stars within 2 kpc. I. Tracing local Galactic structure, massive star-forming regions and core-collapse supernova progenitors

    astro-ph.GA 2026-07 conditional novelty 4.0

    A Gaia DR3-based census of 105,971 OB stars within 2 kpc maps local Galactic structure and identifies over 4,200 core-collapse supernova or black hole progenitor candidates.

  3. TESS light curves and surface activity in two low-mass eclipsing binaries: NSVS 01031772 and 2MASS J04100497+2931023

    astro-ph.SR 2026-07 conditional novelty 4.0

    TESS and ground-based photometry of two low-mass eclipsing binaries yield improved stellar parameters, evidence for tertiary companions via the light-time effect, and a flare frequency of one per 40 hours for NSVS 01031772.