III/157ivo://CDS.VizieR/III/157CDSKinney A.L.Bohlin R.C.Blades J.C.York D.G.2017-07-05T06:59:53Z2005-03-15T21:45:31ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frstar-atlasesseyfert-galaxiesquasarsspectroscopyultraviolet-astronomyThis atlas contains the ultraviolet spectra of 70 quasars, blazars, and Seyfert 1 galaxies that were produced by combining over 100 low resolution spectra from the International Ultraviolet Explorer (IUE) data archive. The spectra have been extracted with an optimal algorithm (see Kinney et al. 1991) and co-added to produce spectra with the best possible signal-to-noise ratio. Introduction: The spectra file currently present in this directory are the digital versions of the spectra that were extracted and co-added for the Ultraviolet Atlas of Quasar and Blazar Spectra, 1991 (reference above) The files contain the optimally extracted data which are described in "Weighted Slit Extraction of Low Dispersion IUE spectra. The optimal extraction is described in A. L. Kinney, R. C. Bohlin, and J. D. Neill 1991PASP..103..694K Each co-added spectrum consists of the wavelength, quality flag, gross flux, background flux, gross flux divided by time, absolutely calibrated net flux, exposure time, and sigma. Details from the headers which formerly prefixed each spectrum are in headers.dat. A third file (objects.dat) is also available, which contains information from Table 1 in the published paper: IAU and alternate designations, redshift (z), V magnitude, object type, E(B-V), galactic longitude and latitude, and number of spectra. The file formats are mostly self explanatory. THE S-AP NOMENCLATURE INDICATES THE SPECTRA THAT ARE NORMALIZED IN FLUX TO THE L-AP SET (USUALLY ONE SPECTRUM, see paper for a more detailed explanation) AND DOES *NOT* MEAN THAT THE SPECTRA WERE OBTAINED IN THE SMALL ENTRANCE APERTURE. The camera numbers of co-added spectra are listed. Each co-added spectrum has 8 columns of ASCII numbers with the titles.1991ApJS...75..645Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/III/157CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVI/110 : Final Merged Log of IUE Observations (NASA-ESA, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=III/157https://vizier.iucaa.in/viz-bin/VizieR-2?-source=III/157http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=III/157https://vizier.cds.unistra.fr/viz-bin/votable?-source=III/157https://vizier.iucaa.in/viz-bin/votable?-source=III/157http://vizieridia.saao.ac.za/viz-bin/votable?-source=III/157GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table III/157/objects (Details on objects included)https://vizier.cds.unistra.fr/viz-bin/conesearch/III/157/objects?https://vizier.iucaa.in/viz-bin/conesearch/III/157/objects?http://vizieridia.saao.ac.za/viz-bin/conesearch/III/157/objects?GETtext/xml+votable180.050000true2.62919110.9748620.0055555555555555566/1701 2414 4695 4770 5091 5163 5290 5306 5423 5974 6264 7426 7548 8071 9181 9457 9490 9612 9633 10039 10217 10298 10691 11596 11668 11723 11829 12025 12380 13927 14858 15351 16059 17075 17857 18001 18125 18661 19287 19567 19746 22363 22659 22890 23323 25580 25742 25965 26131 26292 27127 27580 27862 27964 28060 28164 28356 28471 28479 28532 31663 32961 34123 34264 34881 37385 47014 47375 48614 48965https://cdsarc.cds.unistra.fr/viz-bin/moc/III/157?format=asciiUVdefaultIII/157/objectsDetails on objects includedQSOIAU designationcharSeqSequence numberintNameAlternate designationcharz? Redshift zkm/sfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.intn_z[a:] Redshift from Veron+VeroncharVmagV magnitudemagfloatTypeType QSO (quasar) SY1 (Seyfert type I) or BLZ (blazar)charE(B-V)Color excessmagfloatNsNumber of spectra used for the Atlas.intCalSpCalibrated Spectrum for co-added IUE spectracharObsSpGross spectrum and background fluxcharSimbadSimbad column added by the CDScharNEDSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main