J/AJ/160/242ivo://CDS.VizieR/J/AJ/160/242doi:10.26093/cds/vizier.51600242CDSSalzer J.J.Feddersen J.R.Derloshon K.Gronwall C.Van Sistine A.,Sugden A.Janowiecki S.Hirschauer A.S.Kellar J.A.2022-11-14T07:42:53Z2021-02-12T07:35:17ZCDS support team

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

cds-question@unistra.frstar-forming-regionsh-ii-regionsseyfert-galaxiesquasarsvisible-astronomyspectroscopyredshiftedWe present the second catalog of serendipitously discovered compact extragalactic emission-line sources-H{alpha} Dots. These objects have been discovered in searches of moderately deep narrow-band images acquired for the ALFALFA H{alpha} project. In addition to cataloging 119 new H{alpha} Dots, we also present follow-up spectral data for the full sample. These spectra allow us to confirm the nature of these objects as true extragalactic emission-line objects, to classify them in terms of activity type (star-forming or AGN), and to identify the emission line via which they were discovered. We tabulate photometric and spectroscopic data for the all objects, and we present an overview of the properties of the full H{alpha} Dot sample. The H{alpha} Dots represent a broad range of star-forming and active galaxies detected via several different emission lines over a wide range of redshifts. The sample includes H{alpha}-detected blue compact dwarf galaxies at low redshift, [OIII]-detected Seyfert 2 and Green Pea-like galaxies at intermediate redshifts, and QSOs detected via one of several UV emission lines, including Ly{alpha}. Despite the heterogeneous appearance of the resulting catalog of objects, we show that our selection method leads to well-defined samples of specific classes of emission-line objects with properties that allow for statistical studies of each class.2020AJ....160..242Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/160/242CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/1 : The 3C and 3CR Catalogues (Edge+ 1959-1962)J/MNRAS/204/151 : Bright radio sources at 178 MHz (3CRR) (Laing+ 1983)J/ApJS/95/387 : Universidad Complutense de Madrid list 1 (Zamorano+ 1994)J/ApJS/105/343 : Universidad Complutense de Madrid list 2 (Zamorano+ 1996)J/A+AS/135/511 : The Hamburg/SAO Survey for ELGs (Ugryumov+ 1999)J/A+AS/142/417 : Hamburg/SAO Survey for ELGs. III. (Hopp+, 2000)J/AJ/121/66 : KISS H{alpha} survey list 1 (Salzer+, 2001)J/AJ/123/1292 : KISS III. [O III]-selected survey list (Salzer+, 2002)J/AJ/127/1943 : KISS H{alpha} survey list 2 (Gronwall+, 2004)J/ApJ/668/853 : Spectro. of UltraStrong Emission Line galaxies (Kakazu+,2007)J/AJ/139/279 : Outlying HII regions in HI-selected galaxies (Werk+, 2010)J/AJ/142/170 : ALFALFA survey: {alpha}.40 HI source catalog (Haynes+, 2011)J/AJ/143/145 : Emission-line from ALFALFA H{alpha} survey (Kellar+, 2012)J/A+A/559/A114 : Updated O3N2 and N2 abundance indicators (Marino+, 2013)J/ApJ/844/171 : Ly{alpha} profile in 43 Green Pea galaxies (Yang+, 2017)J/ApJ/861/49 : ALFALFA extragalactic HI source catalog (Haynes+, 2018)J/ApJ/880/7 : Census of the Local Universe survey I CLU-Halpha (Cook+,2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/160/242https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/160/242http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/160/242https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/160/242https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/160/242http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/160/242GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/160/242/table1 (Second list of H{alpha} dots)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/160/242/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/160/242/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/160/242/table1?GETtext/xml+votable180.050000true138.3328512.535360.0055555555555555566/729 731 741-743 745 747 752 757 901 904 906 2071 2102 2104 2107 2128 2184 4123 4144 4168 4218 4285 4303-4304 4308-4309 4322 4369 4376 4381 4654 8308 8382 8480 8712 8717 8719 8744 13350 13450 19942-19943 19945 19948 19953-19955 19961 19964 20179 20187-20188 20191 20209 20212 20215 20255 20277 20288 20384 21966 22002 22347 26462-26463 27519 27578 27601 27604 27608 27867 27872 27880 27921 28185 28199 28224-28225 28228 316432.762881831355591e-19 3.3785437584409506e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/160/242?format=asciiOpticaldefaultJ/AJ/160/242/table1Second list of H{alpha} dotsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDot[62/180] H{alpha} dot candidate number (1)meta.idintprimaryf_DotDuplicated detections flag (2)meta.codecharRAJ2000[1.63/352] Right Ascension (J2000) (3)degpos.eq.ra;meta.mainDEJ2000[4.05/28.1] Declination (J2000) (3)degpos.eq.dec;meta.mainDmag[-2.75/-0.34] Difference, continuum and narrow band magnitudes (4)magphot.mag;arith.difffloatRatio[4.5/112] Ratio, magnitude difference Dmag to magnitude difference error (5)phot.flux;arith.ratiofloatRmag[15.41/22.13] measured R-band magnitude from continuum imagesmagphot.mag;em.opt.Rfloate_Rmag[0.02/0.32] Uncertainty in Rmagmagstat.error;phot.magfloatNBFlux[0.05/5.99] Narrowband Line Flux, 10^-14^erg/s/cm2 (6)1e-17W.m**-2phot.flux;spect.linefloate_NBFlux[0.008/0.09] Uncertainty in NBFlux, 10^-14^erg/s/cm2 (6)1e-17W.m**-2stat.errorfloatRMAG[-28.5/-10.6]? R-band absolute magnitudemagphot.magfloatnullablelogHa[38.5/43.16]? log, H{alpha} luminosity, erg/s1e-07Wphys.luminosity;em.line.HalphafloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharSpropSpectral properties (table 2)meta.ref.urlcharlogSFR[-2.6/1.75]? log, H{alphas}-based star-formation ratelog(solMass.yr**-1)phys.SFRfloatnullableJ/AJ/160/242/table2Measured spectral propertiesDot[62/180] H{alpha} dot candidate numbermeta.idintlogO2/Hb[-0.85/1.12]? log, [OII(3727{AA})]/H{beta} emission line flux ratio (3)spect.line.intensity;arith.ratiofloatnullablelogS2/Ha[-1.35/-0.24]? log, [SII(6717{AA}, 6731{AA})]/H{alpha} emission line flux ratio (3)spect.line.intensity;arith.ratiofloatnullable[O/H][7.4/8.97]? Metallicity, log(O/H)+12log(Sun)phys.abundfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeEmission-line galaxy type (1)src.classcharz[-0.0001/4.5] observed redshiftsrc.redshiftfloatcHb[-0.17/1.61]? Decimal reddening coefficient (2)phys.absorptionfloatnullableEq(Ha)[12.6/2041]? Equivalent width of the H{alpha} line0.1nmspect.line.eqWidthfloatnullableEq(O3)[3.9/1780]? Equivalent width of the [OIII] line0.1nmspect.line.eqWidthfloatnullablelogN2/Ha[-2.26/0.05]? log, [NII(6583{AA})]/H{alpha} emission line flux ratio (3)spect.line.intensity;arith.ratiofloatnullablelogO3/Hb[-0.43/1.41]? log, [OIII 5007{AA})]/H{beta} emission line flux ratio (3)spect.line.intensity;arith.ratiofloatnullable