J/A+A/608/A68ivo://CDS.VizieR/J/A+A/608/A68doi:10.26093/cds/vizier.36080068CDSFallah Ramazani V.Lindfors E.Nilsson K.2017-12-14T06:41:13Z2017-12-08T09:09:59ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsx-ray-sourcesgamma-ray-astronomyradio-sourcesredshiftedgalaxiesvisible-astronomyWe have collected the most complete multi-wavelength (6.0-6.0E^-18^cm) dataset of very high energy (VHE) gamma-ray emitting (TeV) BL Lacs, which are the most numerous extragalactic VHE sources. Using significant correlations between different bands, we aim to identify the best TeV BL Lac candidates that can be discovered by the current and next generation of imaging air Cherenkovtelescopes. We formed five datasets from lower energy data, i.e. radio, mid-infrared, optical, X-rays, and GeV gamma-ray, and five VHE gamma-ray datasets to perform a correlation study between different bands and to construct the prediction method. The low energy datasets were averaged for individual sources, while the VHE gamma-ray data were divided into subsets according to the flux state of the source. We then looked for significant correlations and determined their best-fit parameters. Using the best-fit parameters we predicted the level of VHE gamma-ray flux for a sample of 182 BL Lacs, which have not been detected at TeV energies. We identified the most promising TeV BL Lac candidates based on the predicted VHE gamma-ray flux for each source. We found 14 significant correlations between radio, mid-infrared, optical, gamma-ray, and VHE gamma-ray bands. The correlation between optical and VHE gamma-ray luminosity is established for the first time. We attribute this to the more complete sample and more accurate handling of host galaxy flux in our work. We found nine BL Lac candidates whose predicted VHE gamma-ray flux is high enough for detection in less than 25 hours with current imaging air Cherenkov telescopes.2017A&A...608A..68Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/608/A68CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)J/ApJS/207/16 : BL Lac candidates for TeV observations (Massaro+, 2013)J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/608/A68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/608/A68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/608/A68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/608/A68https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/608/A68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/608/A68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/608/A68/tev (TeV BL Lacs properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/608/A68/tev?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/608/A68/tev?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/608/A68/tev?GETtext/xml+votable180.050000true3.48333-18.901940.005555555555555556Cone search capability for table J/A+A/608/A68/nontev (Non-TeV BL Lacs properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/608/A68/nontev?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/608/A68/nontev?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/608/A68/nontev?GETtext/xml+votable180.050000true2.147083-23.6576940.0055555555555555566/342 398 579 615 716 988 2140 2273 2340 2414 2549 2621 3023 3431 3710 4317 4472 4695 4770 4882 5072 5091 5156 5270 5284 5423 5432 5516 5536 5723 5836 5918 6018 6088 6096 6212 6348 6436 6647 6764 7038 7233 7285 7343 7548 7553 7570 7896 8067 8071 8374 8487 8556 8595 8915 8945 9013 9049 9202 9445 9501 9554 9612 9711 9773 9811 9872 9960 10071 10389 10572 10605 10656 10669 10715 10810 11100 11143 11223 11242 11253 11268 11430 11449 11523 11585 11639 11652 11682 11876 11936 12780 13098 13586 13705 13820 13927 14751 15286 15495 15969 16059 16281 16298 16447 16478 16532 16606 16796 16806 17401 17574 17775 17843 17994 18219 18270 18436 19088 19190 19327 19671 19831 20006 20016 20083 20141 20456 20478 20489 20624 20920 21960 21968 21972 22363 22823 22947 23011 23134 23181 23222 23835 24027 24260 24744 24785 25132 25542 25734 25760 26242 26276 26322 26406 26539 26595 26964 27056 27329 27442 27523-27524 27846 27945 27955 28222 28225 28290 28352 28454 28492 28517 28546 29017 29772 30039 30195 30842 31407 31663 31894 32261 32345 32621 33237 33583 33880 34123 34209 34572 34911 35199 35821 35963 35981 36058 36134 36155 36278 36342 36941 38355 38772 38797 38868 40353 40479 43380 43447 43595 43603 44247 44592 46142 46204 46374 46442 46545 46787 47014 47057 47319 47375 47960 48603 48985 49141https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/608/A68?format=asciiX-rayGamma-rayRadioOpticaldefaultJ/A+A/608/A68/refsReferencesComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference code used in the tablesmeta.note;instr.setupcharBibCodeBibcodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharJ/A+A/608/A68/tevTeV BL Lacs propertiesSimbadNameSimbad column added by the CDSmeta.idcharzRedshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSIMBAD/NED source namemeta.id;meta.maincharRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainr_zReference for redshiftmeta.ref;pos.framecharn_z[abcd] Notes for redshift (1)meta.notecharLRRadio luminosity at 4.85 GHz1e-07Wphys.luminosity;em.radiodoubler_LRReference for radio fluxmeta.ref;pos.framecharLIMid-infrared luminosity (2)1e-07Wphys.luminosity;em.IRdoubleLOOptical (R-band) luminosity1e-07Wphys.luminosity;em.optdoubler_LOReference for Optical (R-band) fluxmeta.ref;pos.framecharLXX-ray luminosity (2-10 keV)1e-07Wphys.luminosity;em.X-raydoubler_LXReference for X-ray flux (2-10 keV)meta.ref;pos.framecharLgammaGamma-ray luminosity (1-100 GeV) (3)1e-07Wphys.luminosity;em.gammadoubleVflag[SD MD] VHE gamma-ray flag (4)meta.codecharVHESD? VHE gamma-ray luminosity (>200GeV) for SD sources1e-07Wphys.luminosity;em.gammadoublenullabler_VHESDReference for VHE gamma-ray flux (>200GeV) of SD sourcesmeta.ref;pos.framecharVHEH? Highest VHE gamma-ray luminosity (>200GeV) for MD sources1e-07Wphys.luminosity;em.gammadoublenullabler_VHEHReference for highest VHE gamma-ray flux (>200GeV) of MD sourcesmeta.ref;pos.framecharVHEL? Lowest VHE gamma-ray luminosity (>200GeV) for MD sources1e-07Wphys.luminosity;em.gammadoublenullabler_VHELReference for lowest VHE gamma-ray flux (>200GeV) of MD sourcesmeta.ref;pos.framecharJ/A+A/608/A68/nontevNon-TeV BL Lacs propertiesSimbadNameSimbad column added by the CDSmeta.idcharRank[1/182] Detectibility rankmeta.codeintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSIMBAD/NED source namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzRedshift (1)src.redshiftfloatSR? Radio flux at 4.85GHzmW.m**-2phot.flux.density;em.radiodoublenullabler_SRReference for radio fluxmeta.ref;pos.framecharSIMid-infrared flux (2)mW.m**-2phot.flux.density;em.IRdoubleSO? Optical (R-band) fluxmW.m**-2phot.flux.density;em.optdoublenullabler_SOReference for Optical (R-band) fluxmeta.ref;pos.framecharSX? X-ray flux (2-10keV)mW.m**-2phot.flux;em.X-raydoublenullabler_SXReference for X-ray flux (2-10keV)meta.ref;pos.framecharSGammaGamma-ray flux (1-100GeV) (3)mW.m**-2phot.flux.density;em.gamma.harddoubleVHEMinMinimum predicted VHE gamma-ray flux (>200GeV)mW.m**-2phot.flux.density;em.gamma.harddoubleVHEMedPredicted VHE gamma-ray flux (>200GeV)mW.m**-2phot.flux.density;em.gamma.harddoubleVHEMaxMaximum predicted VHE gamma-ray flux (>200GeV)mW.m**-2phot.flux.density;em.gamma.harddoubleCorrsPrediction function(s) which produced nearest value to predicted VHE gamma-ray flux (>200GeV)phot.flux;em.gammachar