J/A+A/619/A124ivo://CDS.VizieR/J/A+A/619/A124doi:10.26093/cds/vizier.36190124CDSWang Y.Bihr S.Rugel M.Beuther H.Johnston K.G.Ott J.Soler J.D.,Brunthaler A.Anderson L.D.Urquhart J.S.Klessen R.S.Linz H.,McClure-Griffiths N.M.Glover S.C.O.Menten K.M.Bigiel F.Hoare M.,Longmore S.N.2020-09-01T07:47:23Z2018-11-14T07:55:48ZCDS support team

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

cds-question@unistra.frsurveysgalaxy-planesmilky-way-galaxyradio-sourcesradio-continuum-emissionRadio continuum surveys of the Galactic plane can find and characterize HII regions, supernova remnants (SNRs), planetary nebulae (PNe), and extragalactic sources. A number of surveys at high angular resolution (<~25") at different wavelengths exist to study the interstellar medium (ISM), but no comparable high-resolution and high-sensitivity survey exists at long radio wavelengths around 21cm. Our goal is to investigate the 21cm radio continuum emission in the northern Galactic plane at <25" resolution. We observed a large fraction of the Galactic plane in the first quadrant of the Milky Way (l=14.0{deg}-67.4{deg} and |b|<=1.25{deg}) with the Karl G. Jansky Very Large Array (VLA) in the C-configuration covering six continuum spectral windows. These data provide a detailed view on the compact as well as extended radio emission of our Galaxy and thousands of extragalactic background sources. We used the BLOBCAT software and extracted 10916 sources. After removing spurious source detections caused by the sidelobes of the synthesised beam, we classified 10387 sources as reliable detections.We smoothed the images to a common resolution of 25" and extracted the peak flux density of each source in each spectral window (SPW) to determine the spectral indices {alpha} (assuming I(nu){prop.to}nu^alpha^). By cross-matching with catalogs of HII regions, SNRs, PNe, and pulsars, we found radio counterparts for 840 HII regions, 52 SNRs, 164 PNe, and 38 pulsars. We found 79 continuum sources that are associated with X-ray sources. We identified 699 ultrasteep spectral sources (alpha<-1.3) that could be high-redshift galaxies. Around 9000 of the sources we extracted are not classified specifically, but based on their spatial and spectral distribution, a large fraction of them is likely to be extragalactic background sources. More than 7750 sources do not have counterparts in the SIMBAD database, and more than 3760 sources do not have counterparts in the NED database. Studying the long wavelengths cm continuum emission and the associated spectral indices allows us to characterize a large fraction of Galactic and extragalactic radio sources in the area of the northern inner Milky Way. This database will be extremely useful for future studies of a diverse set of astrophysical objects.2018A&A...619A.124Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/619/A124CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www2.mpia-hd.mpg.de/thor/DATA/www : THOR Data Accesshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/619/A124https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/619/A124http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/619/A124https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/619/A124https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/619/A124http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/619/A124GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/619/A124/catalog (Full continuum catalog (corrected version from erratum, A&A, 641, C1 (2020)))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A124/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A124/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A124/catalog?GETtext/xml+votable180.050000true273.82482694-16.330883060.005555555555555556Cone search capability for table J/A+A/619/A124/listcont (List of continuum fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A124/listcont?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A124/listcont?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A124/listcont?GETtext/xml+votable180.050000true274.4325812-15.96229750.005555555555555556Cone search capability for table J/A+A/619/A124/listavg (List of fits files for average images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A124/listavg?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A124/listavg?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A124/listavg?GETtext/xml+votable180.050000true274.6192196-15.62992250.0055555555555555564/900 5/3242-3243 3585 3588-3589 3606 7279 7365 7376-7377 7380 7382-7383 7554 7561 7564-7565 7567 7578-7579 7604-7605 7648 7650-7651 7654-7655 7661 7672-7673 7676 7678-7679 6/12962 12986-12987 12990-12991 14336-14337 14339 14361 14364-14365 14416 14418-14419 29113 29115 29162-29163 29166 29457 29513 29516-29517 29519 29526-29527 29556-29557 30210 30220 30222-30223 30234 30240-30241 30243 30253 30264-30265 30306-30307 30310 30328 30330-30331 30334-30335 30400-30401 30404-30405 30407 30425 30428-30429 30596 30598-30599 30610 30629 30640-30641 30643 30666-30667 30670 30696-30697 30700-30701 30703 30710-30711 32081 32084-32085https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/619/A124?format=asciiRadiodefaultJ/A+A/619/A124/catalogFull continuum catalog (corrected version from erratum, A&A, 641, C1 (2020))recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIIindicates fitting results for HII region in table4meta.ref.urlcharNameName of the source (GLL.lll+B.bbb) (Gal. ID)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000) of peak position (RA)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) of peak position (Dec)degpos.eq.dec;meta.mainSpPeak intensity of the average image used for source extraction (S_p) (1)Jy/beamphot.flux.density;em.radiodoubleSintIntegrated flux density of the averaged image (S_int)Jyphot.flux.density;em.radiodoubleS/NSignal-to-noise ratio in the averaged image (S/N)stat.snrdoubleBMAJMajor axis of the synthesized beam used for source extraction (BMAJ)arcsecphys.angSizefloatBMINMinor axis of the synthesized beam used for source extraction (BMIN)arcsecphys.angSize;srcfloatBPAPosition angle of the synthesized beam used for source extraction (BPA)degpos.posAng;instr.beamdoubleNpixNumber of pixels flooded by BLOBCAT (n_pix)meta.numberintRes[0/1] Resolved source label, -1 = resolved, 0 = point (resolved_source) (2)meta.codeintSp1060Peak intensity around 1.06GHz used for spectral index (S_p(spw-1060)) (3)Jy/beamphot.flux.density;em.radio.750-1500MHzdoublee_Sp1060Uncertainty of peak intensity around 1.06GHz (delta_S_p(spw-1060)) (3)Jy/beamstat.errordoubleSp1310Peak intensity around 1.31GHz used for spectral index (S_p(spw-1310)) (3)Jy/beamphot.flux.density;em.radio.750-1500MHzdoublee_Sp1310Uncertainty of peak intensity around 1.31GHz (delta_S_p(spw-1310)) (3)Jy/beamstat.errordoubleSp1440Peak intensity around 1.44GHz used for spectral index (S_p(spw-1440)) (3)Jy/beamphot.flux.density;em.radio.750-1500MHzdoublee_Sp1440Uncertainty of peak intensity around 1.44GHz (delta_S_p(spw-1440)) (3)Jy/beamstat.errordoubleSp1690Peak intensity around 1.69GHz used for spectral index (S_p(spw-1690)) (3)Jy/beamphot.flux.density;em.radio.1500-3000MHzdoublee_Sp1690Uncertainty of peak intensity around 1.69GHz (delta_S_p(spw-1690)) (3)Jy/beamstat.errordoubleSp1820Peak intensity around 1.82GHz used for spectral index (S_p(spw-1820)) (3)Jy/beamphot.flux.density;em.radio.1500-3000MHzdoublee_Sp1820Uncertainty of peak intensity around 1.82GHz (delta_S_p(spw-1820)) (3)Jy/beamstat.errordoubleSp1950? Peak intensity around 1.95GHz used for spectral index (S_p(spw-1950)) (3)Jy/beamphot.flux.density;em.radio.1500-3000MHzdoublenullablee_Sp1950? Uncertainty of peak intensity around 1.95GHz (delta_S_p(spw-1950)) (3)Jy/beamstat.errordoublenullablealpha? Spectral index of source we derived (alpha)spect.indexdoublenullablee_alpha? Uncertainty of spectral index (delta_alpha)stat.error;pos.eq.radoublenullablefitspws? Number of SPWs used to fit the spectral index (see Sect. ref{sect_extract}) (fit_spws)meta.numberintnullableNoteNote (Note) (4)meta.notecharCtpThe counterparts of the HII region, SNR, the planetary nebulae and the pulsars (Counterparts)meta.id.assoccharNCtpThe total number of counterparts that the continuum source is associated with (Ncounter)meta.numberintGroupID? The Group of continuum sources associated with one or more same counterparts (GroupID)meta.idintnullableGroupSize? The number of the continuum sources in the same group (GroupSize)meta.numberintnullableJ/A+A/619/A124/table4Fitting results for HII regions (corrected version from erratum, A&A, 641, C1 (2020))recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the source (GLL.lll+B.bbb) (Gal.ID)meta.id;meta.maincharalphaSpectral index of source we derived (alpha)spect.indexdoublee_alphaUncertainty of spectral index (delta_alpha)stat.error;pos.eq.radoubleHIInameName of the HII regions (GLLL.lll+BB.bbb, HRDS GLLL.lll+BB.bbb in Simbad) (HII name)meta.id.assoccharTe? Electron temperature (T_e) (1)Kphys.temperature.electron;phys.electronintnullabled? Distance from the WISE catalog (d)kpcpos.distancefloatnullableEMEmission measure (EM)pc.cm**-6phys.emissMeasuredoubleNe? Electron density (Ne) (2)cm**-3phys.density;phys.electrondoublenullableJ/A+A/619/A124/listcontList of continuum fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintG[G]meta.codecharGLONGalactic longitude of center (J2000)degpos.galactic.lonGLATGalactic latitude center (J2000)degpos.galactic.latNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation date (YYYY-MM-DDThh:mm:ss.ssssss)time.epoch;obscharVRAD? Radial velocitym/sphys.veloc;pos.heliocentricdoublenullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory cont_25arcsecmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/A+A/619/A124/listavgList of fits files for average imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintG[G]meta.codecharGLONGalactic longitude of center (J2000)degpos.galactic.lonGLATGalactic latitude center (J2000)degpos.galactic.latNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation date (YYYY-MM-DDThh:mm:ss.ssssss)time.epoch;obscharsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory averaged_imagemeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexed