Gaia Focused Product Release: Sources from Service Interface Function image analysis -- Half a million new sources in omega Centauri

Abstract

Gaia's readout window strategy is challenged by very dense fields in the sky. Therefore, in addition to standard Gaia observations, full Sky Mapper (SM) images were recorded for nine selected regions in the sky. A new software pipeline exploits these Service Interface Function (SIF) images of crowded fields (CFs), making use of the availability of the full two-dimensional (2D) information. This new pipeline produced half a million additional Gaia sources in the region of the omega Centauri ($\omega$ Cen) cluster, which are published with this Focused Product Release. We discuss the dedicated SIF CF data reduction pipeline, validate its data products, and introduce their Gaia archive table. Our aim is to improve the completeness of the {\it Gaia} source inventory in a very dense region in the sky, $\omega$ Cen. An adapted version of {\it Gaia}'s Source Detection and Image Parameter Determination software located sources in the 2D SIF CF images. We validated the results by comparing them to the public {\it Gaia} DR3 catalogue and external Hubble Space Telescope data. With this Focused Product Release, 526\,587 new sources have been added to the {\it Gaia} catalogue in $\omega$ Cen. Apart from positions and brightnesses, the additional catalogue contains parallaxes and proper motions, but no meaningful colour information. While SIF CF source parameters generally have a lower precision than nominal {\it Gaia} sources, in the cluster centre they increase the depth of the combined catalogue by three magnitudes and improve the source density by a factor of ten. This first SIF CF data publication already adds great value to the {\it Gaia} catalogue. It demonstrates what to expect for the fourth {\it Gaia} catalogue, which will contain additional sources for all nine SIF CF regions.

References in corpus (38)

• The Gaia mission
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Gaia Data Release 3: Summary of the content and survey properties
• Validation of the new Hipparcos reduction
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
• Gaia Early Data Release 3: The astrometric solution
• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• The First Data Release (DR1) of the LAMOST general survey
• The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and 2MASS
• Gaia Early Data Release 3: Photometric content and validation
• The Pan-STARRS1 Database and Data Products
• The Second-Generation Guide Star Catalog: Description and Properties
• The Thirteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey MApping Nearby Galaxies at Apache Point Observatory
• Gaia Early Data Release 3 -- Catalogue validation
• Pan-STARRS Photometric and Astrometric Calibration
• The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8
• SkyMapper Southern Survey: Second Data Release (DR2)
• Gaia Early Data Release 3: Summary of the contents and survey properties
• The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy
• The Streams of the Gaping Abyss: A population of entangled stellar streams surrounding the Inner Galaxy
• The Sixth Data Release of the Radial Velocity Experiment (RAVE) -- II: Stellar Atmospheric Parameters, Chemical Abundances and Distances
• The Sixth Data Release of the Radial Velocity Experiment (RAVE) -- I: Survey Description, Spectra and Radial Velocities
• The Pan-STARRS Data Processing System
• Pan-STARRS Pixel Processing: Detrending, Warping, Stacking
• The State-of-the-Art HST Astro-Photometric Analysis of the core of $\omega$ Centauri. I. The Catalog
• The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
• Pan-STARRS Pixel Analysis : Source Detection and Characterization
• The First U.S. Naval Observatory Robotic Astrometric Telescope Catalog (URAT1)
• The Parallax of Omega Centauri Measured from Gaia EDR3 and a Direct, Geometric Calibration of the Tip of the Red Giant Branch and the Hubble Constant
• Gaia Early Data Release 3. Building the Gaia DR3 source list -- Cross-match of Gaia observations
• Vaex: Big Data exploration in the era of Gaia
• Gaia Early Data Release 3: Modelling and calibration of Gaia's point and line spread functions
• Gaia and Hubble unveil the kinematics of stellar populations in the Type II globular clusters ω Centauri and M 22
• The HST large programme on omega Centauri -- IV. catalogue of two external fields
• Dark and luminous mass components of Omega Centauri with stellar kinematics
• The proper motion of sub-populations in Omega Centauri
• Globular Cluster UVIT legacy Survey (GlobUleS) III. Omega Centauri in Far-Ultraviolet

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• Equilibrium dynamical models in the inner region of the Large Magellanic Cloud based on Gaia DR3 kinematics
• oMEGACat. VI. Analysis of the overall kinematics of Omega Centauri in 3D: velocity dispersion, kinematic distance, anisotropy, and energy equipartition
• RR Lyrae Stars in Intermediate-age Magellanic Clusters: Membership Probabilities and Delay Time Distribution
• Kinematics of metallicity populations in Omega Centauri using Gaia Focused Product Release and Hubble Space Telescope
• The VMC survey -- LIII. Data release #7. Complete survey data and data from additional programmes
• Fewer Companions in the Crowd: The Low Close Binary Fraction in Globular Clusters from Gaia RVS