J/A+A/417/421ivo://CDS.VizieR/J/A+A/417/421doi:10.26093/cds/vizier.34170421CDSBraun R.Thilker D.A.2004-06-06T16:03:20Z2004-06-06T16:02:17ZCDS support team

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

cds-question@unistra.frmolecular-cloudsradial-velocityh-i-line-emissionWe have used the Westerbork array to carry out an unbiased wide-field survey for HI emission features, achieving an RMS sensitivity of about 18mJy/Beam at a velocity resolution of 17km/s over 1800deg^2^ and between -1000<VHel<+6500km/s. The primary data consists of auto-correlation spectra with an effective angular resolution of 49' FWHM. The survey region is centered approximately on the position of Messier 31 and is Nyquist-sampled over 60x30deg in RAxDE. In this paper we present our HI detections at negative velocities which could be distinguished from the Galactic foreground. Fully 29% of the entire survey area has high velocity HI emission at a column density exceeding our 3-sigma limit of about 1.5x10^17cm^-2 over 30km/s. We tabulate the properties of 95 discrete HVC components in the field, corresponding to more than an order of magnitude increase in number over that known previously. The distribution of discrete object number with flux density has an inflection point near 12Jy.km/s which may correspond to a characteristic mass and distance for this population. A complete description of the observations and general methods of data reduction has already been given in Paper I (Braun et al., Cat. <J/A+A/406/829>).2004A&A...417..421Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/417/421CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/406/829 : WSRT wide-field HI survey. I. (Braun+, 2003)J/A+A/391/159 : A search for Compact High-Velocity Clouds (De Heij+, 2002)J/AJ/123/873 : HIPASS high-velocity clouds (Putman+, 2002)J/ApJS/136/463 : Distances and metallicities of HVCs and IVCs (Wakker, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/417/421https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/417/421http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/417/421https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/417/421https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/417/421http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/417/421GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/417/421/table2 (Catalog of high velocity HI features)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/417/421/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/417/421/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/417/421/table2?GETtext/xml+votable180.050000true338.1083324.234440.0055555555555555566/624 694 699 722 735 767 806 2063 2087 2126-2127 2153 2218-2219 2226 2285 2488 2570 2574 2592 2600 2615 2634 2699 2711 2717 2756 2772 2823 13338 13409 13422 13435 13556 13558 13588 13596 13605 13644 13656 13672 13689 13692 13729-13730 13739 13741 13782 13788 13908-13909 13914-13915 13942 13944 14040 19822 19826-19827 19888 19911 19923 19928 19950 19961 20091 20125 20150 20203 20214 20234 20260 20271 20275 20280 20287 20313 20316-20317 20348 20361 20373 20380 20397 20403 20418-20419 20422 20441 20446 20466-20467 20469 20476https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/417/421?format=asciiOpticalRadiodefaultJ/A+A/417/421/table2Catalog of high velocity HI featuresIDsOther published IDs (2)meta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqRunning ID numbermeta.idintPrefName-prefix (HVC or CHVC) (1)meta.idcharNameName-suffix (LLL.L+BB.B+VVV) (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainHRVHeliocentric radial velocitykm/sphys.veloc;pos.heliocentricintFWHMVelocity FWHM of the single spectrum with peak column densitykm/sspect.line.widthfloatNHIPeak HI column density1e+18cm**-2phys.columnDensityfloatMajMajor axis FWHMdegphys.angSize;srcfloatMinMinor axis FWHMdegphys.angSize;srcfloatPArd[0,180] Major axis PA, CCW in (RA,DE) coord.degphys.angSize;srcintFHITotal HI FluxJy.km/sphot.fluxfloat