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@ARTICLE{Bhler:619027,
      author       = {Bühler, Rolf and Schliwinski, Julian},
      title        = {{T}he time-variable ultraviolet sky: {A}ctive galactic
                      nuclei, stars, and white dwarfs},
      journal      = {Astronomy and astrophysics},
      volume       = {687},
      issn         = {0004-6361},
      address      = {Les Ulis},
      publisher    = {EDP Sciences},
      reportid     = {PUBDB-2024-07327, arXiv:2405.14269},
      pages        = {A313},
      year         = {2024},
      note         = {$A\&A$ 687, A313 (2024). Accepted for publication in
                      Astronomy and Astrophysics. The 1UVA catalog will be made
                      available via the Strasbourg astronomical Data Center (CDS).
                      The article has 13 pages and contains 11 figures},
      abstract     = {Here, we present the first catalog of Ultraviolet
                      time-VAriable sources (1UVA). We describe a new analysis
                      pipeline called VAriable Source Clustering Analysis (VASCA).
                      We applied this pipeline to 10 yr of data from the Galaxy
                      Evolution Explorer (GALEX) satellite. We analyzed a sky area
                      302 deg2, and detected 4,202 time-variable ultraviolet (UV)
                      sources. We cross-correlated these sources with
                      multi-frequency data from the Gaia satellite and the Set of
                      Identifications, Measurements and Bibliography for
                      Astronomical Data (SIMBAD) database, finding an association
                      for 3,655 sources. The source sample was dominated by active
                      galactic nuclei $(≈73\%)$ and stars $(≈24\%).$ We
                      examined the UV and multi-frequency properties of these
                      sources, focusing on the stellar population. We found UV
                      variability for four white dwarfs (WDs). One of them, WD
                      J004917.14–252556.81, was recently found to be the most
                      massive pulsating WD. Its spectral energy distribution shows
                      no sign of a stellar companion. The observed flux
                      variability was unexpected and difficult to explain.Key
                      words: catalogs / surveys / Hertzsprung-Russell and C-M
                      diagrams / white dwarfs / quasars: general★ The catalog is
                      available at the CDS via anonymous ftp to
                      cdsarc.cds.unistra.fr (130.79.128.5) or via
                      https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/687/A313},
      cin          = {$Z_GA$},
      ddc          = {520},
      cid          = {$I:(DE-H253)Z_GA-20210408$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613)},
      pid          = {G:(DE-HGF)POF4-613},
      experiment   = {EXP:(DE-H253)CTA-20150101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2405.14269},
      howpublished = {arXiv:2405.14269},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2405.14269;\%\%$},
      UT           = {WOS:001278251300001},
      doi          = {10.1051/0004-6361/202449973},
      url          = {https://bib-pubdb1.desy.de/record/619027},
}