1,205 datasets found

Keywords: Quasars

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  • Unobscured QSOs in ecliptic poles from KMTNet & PS1

    We search for quasi-stellar objects (QSOs) in a wide area of the south ecliptic pole (SEP) field, which has been and will continue to be intensively explored through various...
  • The Million Quasars (Milliquas) catalogue, version 7.2

    This is a compendium of 829666 type-I QSOs and AGN, largely complete from the literature to 30 April 2021 including SDSS-DR16 quasars and VLASS radio. Also included are 703348...
  • CGM2 galaxy-OVI absorber pairs

    We combine 126 new galaxy-OVI absorber pairs from the CGM^2^ survey with 123 pairs drawn from the literature to examine the simultaneous dependence of the column density of OVI...
  • eUDS, SRG/eROSITA X-ray Survey of UKIDSS UDS

    The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) spacecraft observed the field of the UKIDSS Ultra-Deep Survey (UDS) in August-September 2019, during its...
  • 121 compact extragalactic radio sources

    We compared a sample of 121 compact extragalactic radio sources with a matching comparison sample of extended sources (ECS). The former consists of peaked-spectrum sources (PSS)...
  • Leptohadronic parameters of 324 blazars

    The origin of the diffuse astrophysical neutrino flux observed by the IceCube experiment is still under debate. Multiple associations have been reported between high-energy...
  • 30yrs of spectroscopic measurements of VMP DLAs

    We place empirical constraints on the yields from zero- and low-metallicity core-collapse supernovae (CCSNe) using abundances measured in very metal-poor (VMP; [Fe/H]<=-2)...
  • VEXAS DR2 catalogs

    We present the second public data release of the VISTA EXtension to Auxiliary Surveys (VEXAS DR2), where we classify objects into stars, galaxies and quasars based on an...
  • Gaia Focused Product Release (Gaia FPR)

    The Gaia Focused Product Release builds partly on the data period that went into Gaia's Data Release 3 but in case of the Solar System objects extends the stretch of time that...
  • Asiago Catalogue of QSOs

    The Asiago Catalog of 2004 Quasi Stellar Objects (QSOs) is an updated version of that published by Barbieri, Capaccioli and Zambon in 1975 (1975MmSAI..46..461B). Most of the...
  • The Million Quasars (Milliquas) catalogue, version 8

    This is a compendium of 907144 type-I QSOs and AGN, largely complete from the literature to 30 June 2023. 66,026 QSO candidates are also included, calculated via radio/X-ray...
  • SDSS quasar catalog, sixteenth data release (DR16Q)

    We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data Release 16 of the extended Baryon Oscillation Spectroscopic Survey (eBOSS). This catalog...
  • SDSS quasar catalog, fourteenth data release

    We present the data release 14 Quasar catalog (DR14Q) from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the Sloan Digital Sky Survey IV (SDSS-IV). This...
  • Gaia DR2 quasar and galaxy classification

    We provide probabilistic quasar and galaxy classifications for 2.7 million sources in Gaia Data Release 2. This has been achieved using a supervised classification method...
  • The Million Quasars (Milliquas) catalog (6.3)

    This is a compendium of 623,004 type-I QSOs and AGN, largely complete from the literature to 15 June 2019 including SDSS-DR15 and LAMOST QSO DR5. Also included are approx 1.32M...
  • The Million Quasars (Milliquas) catalog (V5.2)

    This is a compendium of 607,208 type-I QSOs and AGN, largely complete from the literature to 5-August-2017, including the release of SDSS-DR14. Also included are ~1.35M...
  • SDSS quasar catalog: twelfth data release

    We present the Data Release 12 Quasar catalog (DR12Q) from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky SurveyIII. This catalog includes all...
  • The Million Quasars (Milliquas) catalog

    This is a compendium of 452,794 type-I QSOs and AGN, largely complete from the literature to 21 June 2016. Also included are ~900K high-confidence quasar candidates from...
  • Second Byurakan Survey. General Catalogue

    The Second Byurakan Survey (SBS) General Catalogue is presented. The SBS, a continuation of the Markarian survey reaching fainter limiting magnitudes, is the first survey which...
  • The Roma BZCAT - 5th edition

    The Roma-BZCAT is now at the 5th Edition which contains coordinates and multi-frequency data of 3561 sources, about 30% more than in the 1st edition, either confirmed blazars or...
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