Astrometry with PRAIA

Abstract

PRAIA - Package for the Reduction of Astronomical Images Automatically - is a suite of astrometric and photometric tasks designed to cope with huge amounts of heterogeneous observations with fast processing, no human intervention, minimum parametrization and yet maximum possible accuracy and precision. It is the main tool used to analyse astronomical observations by an international collaboration involving Brazilian, French and Spanish researchers under the Lucky Star umbrella for Solar System studies. In this paper, we focus on the astrometric concepts underneath PRAIA, used in reference system works, natural satellite and NEA astrometry for dynamical and ephemeris studies, and lately for the precise prediction of stellar occultations by planetary satellites, dwarf-planets, TNOs, Centaurs and Trojan asteroids. We highlight novelties developed by us and never reported before in the literature, which significantly enhance astrometry precision and automation. Such as the robust object detection and aperture characterization (BOIA), which explains the long standing empirical photometry/astrometry axiom that recommends using apertures with 2 - 3 sigma (Gaussian width) radius. We give examples showing the astrometry performance, discuss the advantages of PRAIA over other astrometry packages and comment about future planed astrometry implementations. PRAIA codes and input files are publicly available for the first time at: https://ov.ufrj.br/en/PRAIA/. PRAIA astrometry is useful for Solar System as well as astrophysical observations.

References in corpus (41)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• The VizieR database of Astronomical Catalogues
• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• Astrometry.net: Blind astrometric calibration of arbitrary astronomical images
• A ring system detected around the Centaur (10199) Chariklo
• The size, shape, density and ring of the dwarf planet Haumea from a stellar occultation
• Gaia Data Release 2: The Celestial reference frame (Gaia-CRF2)
• UCAC5: New Proper Motions using Gaia DR1
• Pluto's atmosphere from the 29 June 2015 ground-based stellar occultation at the time of the New Horizons flyby
• Characterizing and correcting the proper motion bias of the bright Gaia EDR3 sources
• Orbit determination of Transneptunian objects and Centaurs for the prediction of stellar occultations
• Pluto's atmosphere from stellar occultations in 2012 and 2013
• Stellar Photometry and Astrometry with Discrete Point Spread Functions
• Size and shape of Chariklo from multi-epoch stellar occultations
• Study of the plutino object (208996) 2003 AZ84 from stellar occultations: size, shape and topographic features
• Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020
• The structure of Chariklo's rings from stellar occultations
• Results from the 2014 November 15th multi-chord stellar occultation by the TNO (229762) 2007 UK${}_{126}$
• Stellar occultations enable milliarcsecond astrometry for Trans-Neptunian objects and Centaurs
• Candidate stellar occultations by large trans-neptunian objects up to 2015
• A multi-chord stellar occultation by the large trans-Neptunian object (174567) Varda
• Astrometric positions for 18 irregular satellites of giant planets from 23 years of observations
• The large Trans-Neptunian Object 2002 TC${}_{302}$ from combined stellar occultation, photometry and astrometry data
• Astrometry of mutual approximations between natural satellites. Application to the Galilean moons
• Constraints on the structure and seasonal variations of Triton's atmosphere from the 5 October 2017 stellar occultation and previous observations
• Pluto's ephemeris from ground-based stellar occultations (1988-2016)
• Characterization of precision premium in astrometry
• Physical properties of the trans-Neptunian object (38628) Huya from a multi-chord stellar occultation
• APPROX -- Mutual approximations between the Galilean moons. The 2016-2018 observational campaign
• The trans-Neptunian object (84922) 2003 VS2 through stellar occultations
• Pluto's atmosphere in plateau phase since 2015 from a stellar occultation at Devasthal
• Differential aperture photometry and digital coronagraphy with PRAIA
• The astrometric Gaia-FUN-SSO observation campaign of 99 942 Apophis
• Astrometry of the main satellites of Uranus: 18 years of observations
• The multichord stellar occultation on 2019 October 22 by the trans-Neptunian object (84922) 2003 VS${}_2$
• Astrometry and Occultation predictions to Trans-Neptunian and Centaur Objects observed within the Dark Energy Survey
• The first observed stellar occultations by the irregular satellite (Saturn IX) Phoebe and improved rotational period
• The 2017 May 20${}^{\mathrm{th}}$ stellar occultation by the elongated centaur (95626) 2002 GZ${}_{32}$
• New orbits of irregular satellites designed for the predictions of stellar occultations up to 2020, based on thousands of new observations
• On the influence of radio extended structures on offsets between the optical and VLBI positions of sources in the ICRF2

Cited by in corpus (1)

• Differential aperture photometry and digital coronagraphy with PRAIA