Extinction catalog from Gaia DR3 & LAMOST DR11 J/ApJS/280/15 ivo://CDS.VizieR/J/ApJS/280/15 CDS Wang T. Yuan H. Chen B. Xiang M. Zhang R. Huang B. Gu H. Wang S.,Li J. 2026-06-22T07:22:00Z 2026-06-22T07:41:11Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr extinction interstellar-medium milky-way-galaxy interstellar-reddening visible-astronomy spectroscopy We present a comprehensive 3D dust-reddening map covering the entire Milky Way, constructed by combining reddening estimates based on Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST) low-resolution spectra (E(B-V)_LAMOST_) with those derived from Gaia XP spectra (E(B-V)_XP_), along with revised Gaia distances. E(B-V)_LAMOST_ values of ~4.6 million unique sources were obtained with the standard-pair analysis using LAMOST DR11 stellar parameters and synthesized B-/V-band photometry from Gaia XP spectra, showing a typical precision of ~0.01mag. The E(B-V)_XP_ from the catalog of Zhang+ 2023MNRAS.524.1855Z, which was derived using forward modeling of Gaia XP spectra, were cross-validated with E(B-V)_LAMOST_, leading to the selection of ~150 million high-reliability measurements. The combined data set achieves a median precision of ~0.03 mag for E(B-V). To model the reddening-distance relationship along various lines of sight, we implemented a parametric approach that accounts for contributions from the Local Bubble, diffuse interstellar medium, and multiple potential molecular clouds. The sky was adaptively partitioned based on stellar density, resulting in angular resolutions ranging from 3.4' to 58', with about half of the sky having a resolution better than 6.9'. The reddening precision of our 3D map for individual stars reaches ~0.01 mag in most regions at |b|>20{deg}, but degrades to 0.01-0.05 mag at |b|<20{deg}. The map reaches a maximum distance of 3-5 kpc in high- extinction regions with |b|<5{deg}, and extends to 10-15 kpc elsewhere. An interactive platform and Python package have been developed for utilization of the 3D dust map. 2025ApJS..280...15W https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/280/15 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021) I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022) I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022) V/162 : LAMOST DR11 catalogs (Luo+, 2026) J/A+A/453/635 : Modelling the Gal. Interstellar Extinction (Marshall+, 2006) J/other/RAA/11.924 : Atmospheric parameters for 771 stars (Wu+, 2011) J/A+A/550/A42 : Extinction map towards the Galactic bulge (Chen+, 2013) J/ApJ/885/131 : ~200 high-mass SFR plx & proper motion with VLBI (Reid+, 2019) J/A+A/661/A147 : Gal. interstellar dust Gaia-2MASS 3D maps (Lallement+, 2022) J/A+A/664/A174 : Galactic interstellar dust Gaia-2MASS 3D maps (Vergely+, 2022) J/A+A/674/A33 : Gaia synthetic phot. cat. of white dwarfs (Gaia Coll., 2023) J/ApJS/280/16 : All-sky cat. of MoCs from 3D dust map (Wang+, 2025) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/280/15 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/280/15 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/280/15 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/280/15 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/280/15 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/280/15 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJS/280/15/table1 (LAMOST extinction catalog) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/280/15/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/280/15/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/280/15/table1? 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Should Not be used for identification. meta.record int ObsID [101001/1128116245] Unique spectra identifier for LAMOST DR11 meta.id;meta.main long GaiaDR3 Unique source identifier for Gaia DR3 meta.id.cross RA_ICRS [0/360] Right ascension from Gaia DR3 (ICRS) at Ep=2016 deg pos.eq.ra;meta.main indexed DE_ICRS [-9.8/89.2] Declination from Gaia DR3 (ICRS) at Ep=2016 deg pos.eq.dec;meta.main indexed E(B-V) [-0.1/2.5] E(B-V) extinction values from this work mag phot.color.excess;em.opt.B;em.opt.V double e_E(B-V) [0.008/0.09] Uncertainty in E(B-V) from this work mag stat.error;phot.color.excess;em.opt double