The Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release 10 to 12

Abstract

We present the quasar catalog from Data Releases 10 to 12 of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey, comprising quasars observed between September 2021 and June 2024. We robustly identified $11,346$ quasars, of which $5,386$ are newly discovered objects not present in the Million Quasars catalog. This release brings the total number of quasars identified by the 12-year LAMOST survey to $67,521$, of which $29,513$ are newly discovered. While the absolute flux calibration for LAMOST quasar spectra from Data Releases 6 to 9 was previously performed using the SDSS/PanSTARRS1 multi-band photometric data, the inherent variability of quasars can affect the flux accuracy. To address this limitation, we recalibrated the LAMOST spectra using (quasi-)simultaneous photometric data from Zwicky Transient Facility (ZTF), which has conducted high-cadence sky monitoring since March 2018. Based on the recalibrated single-epoch spectra, we estimated the emission line fluxes, continuum fluxes, and virial black hole masses. These improved spectra facilitate direct comparison with the spectra of common quasars from the Sloan Digital Sky Survey (SDSS), enabling searches for rare quasars, such as changing-look quasars exhibiting the appearance or disappearance of broad emission lines and broad absorption line quasars. The combined dataset of photometry and multi-epoch spectra will enhance the detections of AGN-related transients, such as Bowen fluorescence flares and extreme variability quasars, thereby improving our understanding of quasar variability.

arXiv comment18 figures, 2 tables, accepted by ApJs

References in corpus (73)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Sloan Digital Sky Survey: Technical Summary
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• Composite Quasar Spectra From the Sloan Digital Sky Survey
• A Catalog of Quasar Properties from SDSS DR7
• The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
• Determining Central Black Hole Masses in Distant Active Galaxies and Quasars. II. Improved Optical and UV Scaling Relationships
• Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar
• The SDSS Quasar Survey: Quasar Luminosity Function from Data Release Three
• The First Data Release (DR1) of the LAMOST general survey
• Old Stellar Populations. VI. Absorption-Line Spectra of Galaxy Nuclei and Globular Clusters
• The Pan-STARRS1 Database and Data Products
• The 2dF QSO Redshift Survey - I. The Optical QSO Luminosity Function
• An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
• Second ROSAT all-sky survey (2RXS) source catalogue
• The Sloan Digital Sky Survey Quasar Catalog IV. Fifth Data Release
• The Optical to Mid-Infrared Extinction Law Based on the APOGEE, Gaia DR2, Pan-STARRS1, SDSS, APASS, 2MASS and WISE Surveys
• The Sloan Digital Sky Survey Quasar Catalog: Fourteenth Data Release
• The Discovery of the First "Changing Look" Quasar: New Insights into the Physics & Phenomenology of AGN
• The XMM-Newton serendipitous survey IX. The fourth XMM-Newton serendipitous source catalogue
• Efficient Photometric Selection of Quasars from the Sloan Digital Sky Survey: II. ~1,000,000 Quasars from Data Release Six
• A Systematic Search for Changing-Look Quasars in SDSS
• The SDSS-III Baryon Oscillation Spectroscopic Survey: Quasar Target Selection for Data Release Nine
• The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V
• The Sloan Digital Sky Survey quasar catalog: ninth data release
• Fe II Emission in 14 Low-Redshift Quasars: I - Observations
• The Black Hole Mass - Galaxy Bulge Relationship for QSOs in the SDSS DR3
• Estimating Black Hole Masses in Active Galactic Nuclei Using the MgII 2800 Emission Line
• The UKIRT Infrared Deep Sky Survey Early Data Release
• Discovery of 21 New Changing-look AGNs in Northern Sky
• Spectral properties of quasars from Sloan Digital Sky Survey data release 14: The catalog
• Think Outside the Color Box: Probabilistic Target Selection and the SDSS-XDQSO Quasar Targeting Catalog
• A Catalog of Quasar Properties from Sloan Digital Sky Survey Data Release 16
• The Sloan Digital Sky Survey Reverberation Mapping Project: Sample Characterization
• Black Hole Mass Estimates Based on CIV are Consistent with Those Based on the Balmer Lines
• Changing-Look Quasar Candidates: First Results from Follow-up Spectroscopy of Highly Optically Variable Quasars
• Blueshifted [O III] Emission: Indications of a Dynamic NLR
• Quasars Probing Quasars II: The Anisotropic Clustering of Optically Thick Absorbers around Quasars
• Detailed Characterization of H_beta emission line profile in low z SDSS quasars
• Narrow-line Seyfert 1 Galaxies and the M_BH - sigma Relation
• Are Outflows Biasing Single-Epoch CIV Black Hole Mass Estimates?
• SDSS quasars in the WISE preliminary data release and quasar candidate selection with optical/infrared colors
• The Million Quasars (Milliquas) Catalogue, v8
• A new class of flares from accreting supermassive black holes
• The KX method for producing K-band flux-limited samples of quasars
• AGN Selection and Demographics in GOODS-S/HUDF from X-ray to Radio
• Broad Hbeta Emission-Line Variability in a Sample of 102 Local Active Galaxies
• The Sloan Digital Sky Survey Reverberation Mapping Project: Low-Ionization Broad-Line Widths and Implications for Virial Black Hole Mass Estimation
• Quasar candidate selection and photometric redshift estimation based on SDSS and UKIDSS data
• The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: the 4th and 5th Data Release
• Discovery of A Mg II Changing-look AGN and its Implications for a Unification Sequence of Changing-look AGNs
• Efficient Selection of Quasar Candidates Based on Optical and Infrared Photometric Data Using Machine Learning
• The Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release Two and Three
• The Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release Six to Nine
• Selecting Quasar Candidates by a SVM Classification System
• The Large Sky Area Multi-Object Fiber Spectroscopic Telescope Quasar Survey: Quasar Properties from First Data Release
• The FeII/MgII flux ratio of low-luminosity quasars at z~3
• Finding Quasars behind the Galactic Plane. I. Candidate Selections with Transfer Learning
• Two New "Turn-off" Changing-look Active Galactic nuclei and Implication on "Partially Obscured" AGNs
• Asymmetric emission of the [OIII]$\lambda$5007 profile in narrow-line Seyfert 1 galaxies
• SDSS-IV/SPIDERS: A Catalogue of X-Ray Selected AGN Properties; Spectral Properties and Black Hole Mass Estimates for SPIDERS SDSS DR14 Type 1 AGN
• The LAMOST Survey of Background Quasars in the Vicinity of the Andromeda and Triangulum Galaxies -- II. Results from the Commissioning Observations and the Pilot Surveys
• AT 2021loi: A Bowen Fluorescence Flare with a Rebrightening Episode, Occurring in a Previously-Known AGN
• Relative Flux Calibration of the LAMOST Spectroscopic Survey of the Galactic Anti-center
• CatNorth: An Improved Gaia DR3 Quasar Candidate Catalog with Pan-STARRS1 and CatWISE
• WISE view of Narrow-Line Seyfert 1 galaxies: mid-infrared color and variability
• ASERA: A Spectrum Eye Recognition Assistant for Quasar Spectra
• Finding Quasars behind the Galactic Plane. II. Spectroscopic Identifications of 204 Quasars at $|b|<20°$
• The Type 1 and Type 2 AGN dichotomy according to their ZTF optical variability
• Extreme Variability Quasars in Their Various States. II: Spectral Variation Revealed with Multi-epoch Spectra