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<ri:Resource created="2005-08-12T12:59:06Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>Absolute fluxes and distances of PN</title><shortName>J/A+AS/94/399</shortName><identifier>ivo://CDS.VizieR/J/A+AS/94/399</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Cahn J.H.</name></creator><creator><name>Kaler J.B.</name></creator><creator><name>Stanghellini L.</name></creator><date role="Updated">2017-12-15T10:55:43Z</date><date role="Created">2005-08-12T12:59:06Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>planetary-nebulae</subject><subject>stellar-distance</subject><subject>extinction</subject><description>We present a complete list of averaged recalibrated absolute H{beta} fluxes, global (where possible) relative He II {lambda} 4686 fluxes, 5-GHz radio flux densities, and H{alpha}/H{beta} interstellar extinction constants for 778 Galactic planetary nebulae. The catalog provides much of the fundamental data required to generate Zanstra temperatures. When data with the lowest errors are selected, the optical and radio/optical extinctions show a peculiar correlation, with the radio values slightly high at low extinction and notably low at high extinction. The data are used, along with the best estimates of angular diameters, to calculate Shklovsky distances according to the Daub scheme on the scale used earlier by Cahn and Kaler (1971ApJS...22..319C). Use of this distance scale shows approximate equality of the death rates of optically thick and optically thin planetary nebulae. The method gives the correct distances to the Magellanic Clouds.</description><source format="bibcode">1992A&amp;AS...94..399C</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/94/399</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/V/84">V/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+, 1992)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/VI/14">VI/14 : Bibliographical index of planetary nebulae for the period 1965-79</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/IV/24">IV/24 : Catalogue of Galactic 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Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>n_Name</name><description>[pHS*] Note on Name (G1)</description><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>PK</name><description>PK number</description><dataType xsi:type="vs:VOTableType" arraysize="9*">char</dataType></column><column><name>Te</name><description>Electron temperature</description><unit>0.0001K</unit><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>HeIII/HeI</name><description>? HeIII/HeI ratio (G2)</description><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>He/H</name><description>? He/H ratio (G2)</description><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>log(FHb)</name><description>? H{beta} flux (G2)</description><unit>log(mW.m**-2)</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_log(FHb)</name><description>? rms uncertainty on log(FHb)</description><unit>log(mW.m**-2)</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>r_log(FHb)</name><description>References for H{beta} data, in refs.dat file</description><dataType xsi:type="vs:VOTableType" arraysize="24*">char</dataType></column><column><name>I(HeII)</name><description>? Average intensity of He II {lambda}4686, on scale I(H{beta})=100 (G2)</description><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_I(HeII)</name><description>? rms uncertainty on I(HeII)</description><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>r_I(HeII)</name><description>References for He II {lambda}4686 data, in refs.dat file</description><dataType xsi:type="vs:VOTableType" arraysize="15*">char</dataType></column><column><name>Simbad</name><description>Simbad column added by the CDS</description><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>_RA</name><description>Right Ascension (J2000) from SIMBAD (not part of the original data)</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd></column><column><name>_DE</name><description>Declination (J2000) from SIMBAD (not part of the original data)</description><unit>deg</unit><ucd>pos.eq.dec;meta.main</ucd></column><column><name>Name</name><description>PN name</description><dataType xsi:type="vs:VOTableType" arraysize="10*">char</dataType><flag>primary</flag></column></table><table><name>J/A+AS/94/399/table2</name><description>*Radio flux observations and radio and optical extinctions of galactic planetary nebulae.</description><column><name>n_Name</name><description>Note on Name (G1)</description><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>recno</name><description>Record number assigned by the VizieR team. 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Flux density at nu frequency</description><unit>Jy</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_F(nu)</name><description>? rms uncertainty on F(nu)dnu</description><unit>Jy</unit><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>n_F(nu)</name><description>[:] : For Bl 2-1, E{nu}=K.011, modified in 0.011</description><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>r_F(nu)</name><description>References for nu data, in refs.dat file</description><dataType xsi:type="vs:VOTableType" arraysize="14*">char</dataType></column><column><name>F(5)</name><description>? Flux density at 5GHz (G2)</description><unit>Jy</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>cr</name><description>? Radio extinction constant (G2) (1)</description><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_cr</name><description>[E] E: Err, no data</description><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>calpha</name><description>? Optical extinction constant (G2) (2)</description><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_calpha</name><description>? rms uncertainty on calpha</description><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>r_calpha</name><description>References for alpha data, in refs.dat file</description><dataType xsi:type="vs:VOTableType" arraysize="50*">char</dataType></column></table><table><name>J/A+AS/94/399/table4</name><description>*Distances, optical depth, and radii of galactic planetary nebulae.</description><column><name>recno</name><description>Record number assigned by the VizieR team. 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Angular radius</description><unit>arcsec</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_RadAng</name><description>[:] : For Vy2-1, ?.9 modified in 1.9</description><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Fb(5)</name><description>? Equivalent 5GHz radio flux, derived from H{beta}</description><unit>Jy</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_Fb(5)</name><description>[E] E: Err, no data</description><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>F(5)</name><description>? 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