<?xml-stylesheet href='/static/xsl/oai.xsl' type='text/xsl'?>
<ri:Resource created="2013-08-05T08:35:54Z" 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>VLBA 5GHz observations of Fermi/LAT AGNs</title><shortName>J/ApJ/744/177</shortName><identifier>ivo://CDS.VizieR/J/ApJ/744/177</identifier><altIdentifier>doi:10.26093/cds/vizier.17440177</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Linford J.D.</name></creator><creator><name>Taylor G.B.</name></creator><creator><name>Romani R.W.</name></creator><creator><name>Helmboldt J.F.</name></creator><creator><name>Readhead A.C.S.,Reeves R.</name></creator><creator><name>Richards J.L.</name></creator><date role="Updated">2017-12-15T10:55:41Z</date><date role="Created">2013-08-05T08:35:54Z</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>active-galactic-nuclei</subject><subject>bl-lacertae-objects</subject><subject>quasars</subject><subject>radio-continuum-emission</subject><subject>gamma-ray-astronomy</subject><subject>redshifted</subject><description>The radio properties of blazars detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have been observed contemporaneously by the Very Long Baseline Array (VLBA). In total, 232 sources were observed with the VLBA. Ninety sources that were previously observed as part of the VLBA Imaging and Polarimetry Survey (VIPS) have been included in the sample, as well as 142 sources not found in VIPS. This very large, 5GHz flux-limited sample of active galactic nuclei (AGNs) provides insights into the mechanism that produces strong {gamma}-ray emission. In particular, we see that {gamma}-ray emission is related to strong, uniform magnetic fields in the cores of the host AGN. Included in this sample are non-blazar AGNs such as 3C84, M82, and NGC 6251. For the blazars, the total VLBA radio flux density at 5GHz correlates strongly with {gamma}-ray flux. The LAT BL Lac objects tend to be similar to the non-LAT BL Lac objects, but the LAT flat-spectrum radio quasars (FSRQs) are significantly different from the non-LAT FSRQs. Strong core polarization is significantly more common among the LAT sources, and core fractional polarization appears to increase during LAT detection.</description><source format="bibcode">2012ApJ...744..177L</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/744/177</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/J/ApJS/199/31">J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/535/A69">J/A+A/535/A69 : AGN Fermi/LAT {gamma}-ray and 37GHz fluxes (Nieppola+, 2011)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/741/30">J/ApJ/741/30 : Radio/{gamma}-ray correlation in AGN (Ackermann+, 2011)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/742/27">J/ApJ/742/27 : 15GHz and jet properties of MOJAVE blazars (Lister+, 2011)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/722/L7">J/ApJ/722/L7 : Fermi/LAT detected MOJAVE AGNs (Pushkarev+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/715/429">J/ApJ/715/429 : First Fermi-LAT AGN catalog (1LAC) (Abdo+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/188/405">J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/718/587">J/ApJ/718/587 : The Fermi-AT20G catalog (Mahony+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/137/3718">J/AJ/137/3718 : 15GHz monitoring of AGN jets with VLBA (Lister+, 2009)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/658/203">J/ApJ/658/203 : VLBA imaging and polarimetry survey at 5GHz (Helmboldt+, 2007)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/171/61">J/ApJS/171/61 : All-Sky Survey of Flat-Spectrum Radio Sources (Healey+, 2007)</relatedResource><relatedResource>http://www.physics.purdue.edu/astro/MOJAVE/ : the MOJAVE home page</relatedResource></relationship></content><rights>https://cds.unistra.fr/vizier-org/licences_vizier.html</rights><capability><interface xsi:type="vr:WebBrowser"><accessURL use="full">https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/744/177</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/744/177</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/744/177</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/744/177</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/744/177</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/744/177</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface></capability><capability standardID="ivo://ivoa.net/std/TAP#aux"><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://tapvizier.cds.unistra.fr/TAPVizieR/tap</accessURL></interface></capability><capability xsi:type="cs:ConeSearch" standardID="ivo://ivoa.net/std/ConeSearch"><description>Cone search capability for table J/ApJ/744/177/table1 (Source data)</description><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/744/177/table1?</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/744/177/table1?</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/744/177/table1?</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface><maxSR>180.0</maxSR><maxRecords>50000</maxRecords><verbosity>true</verbosity><testQuery><ra>1.48825</ra><dec>38.33755</dec><sr>0.005555555555555556</sr></testQuery></capability><coverage><spatial>6/438 514 556 579 770 808 893 911 991 1085 1120 1222 1701 2122 2143 2228 2234 2331 2404 2661 2741 2836 2867 3876 3882 3886 3951 4312 4352 4407 4413 4572 4601 4695 4770 4820 4866 4940 4964 5072 5139 5162 5201 5390 5423 5458 5546 5775 5776 5795 5817 5870 6015 6018 6067 6088 6101 6167 6368 6436 6501 6507 6647 6777 6815 6822 6888 6948 6963 6996 7004 7045 7091 7212 7235 7285 7346 7354 7389 7426 7446 7548 7570 7606 7653 7655 7709 7758 7896 7911 7969 8057 8299 8466 8515 8615 8699 8746 8830 8915 9003 9075 9204 9442 9501 9545 9566 9570 9629 9676 9711 9853 9893 9998 10033 10071 10119 10198 10216 10249 10250 10280 10352 10422 10426 10466 10474 10561 10597 10681 10800 10910 10921 11027 11045 11081 11083 11153 11177 11212 11242 11321 11323 11523 11631 11639 11649 11777 11965 12173 12199 12218 12241 12258 12444 12466 12475 12599 12604 12619 12625 12687 13156 13179 13352 13353 13410 13485 13572 13582 13586 13664 13705 13711 14854 15147 15211 15286 15969 15998 16027 16059 16086 16170 16272 16281 16298 18402 19789 19831 19890 19918 20006 20099 20141 20213 20468 22396 22501 23383 23416 24027 24084 24123 26550 28066 28083 28117 28139 28225 28352 28370 28454 28479 28492 28498 28517 28542 31599 31663 31664 31915 32261 32311 32345 32611 32621</spatial><spectral>3.313034785154005e-24 3.313034785154005e-24</spectral><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/744/177?format=ascii</footprint><waveband>Gamma-ray</waveband><waveband>Optical</waveband><waveband>Radio</waveband></coverage><tableset><schema><name>default</name><table><name>J/ApJ/744/177/table1</name><description>Source data</description><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Name</name><description>Radio source name ([J/F]HHMMm+DDMM) (1)</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="11*">char</dataType></column><column><name>f_Name</name><description>[c] c: MOJAVE source (2)</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>1FGL</name><description>1FGL name (JHHMM.m+DDMM)</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="12*">char</dataType></column><column><name>f_1FGL</name><description>[a] multiple associated radio sources (3)</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>OName</name><description>Alternative name</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="17*">char</dataType></column><column><name>RAJ2000</name><description>Hour of right ascension (J2000)</description><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DEJ2000</name><description>Degree of declination (J2000)</description><ucd>pos.eq.dec;meta.main</ucd></column><column><name>Otype</name><description>Optical object type (4)</description><ucd>spect.dopplerVeloc.opt;em.opt</ucd><dataType xsi:type="vs:VOTableType" arraysize="3*">char</dataType></column><column><name>Class</name><description>Automated source classification (5)</description><ucd>src.class</ucd><dataType xsi:type="vs:VOTableType" arraysize="4*">char</dataType></column><column><name>z</name><description>[0.0006/3.04]? Redshift from 1LAC (Cat. J/ApJ/715/429), unless flagged</description><ucd>src.redshift</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>f_z</name><description>[b] b: redshift obtained from NED</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>S5</name><description>[14/16200] Total VLBA flux density at 5GHz</description><unit>mJy</unit><ucd>phot.flux.density;em.radio.3-6GHz</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Flux</name><description>[9/1356] Fermi/LAT {gamma}-ray flux for 100MeV to 100GeV</description><unit>1e-05ph.m**-2.s**-1</unit><ucd>phot.flux.density;em.gamma.hard</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_Flux</name><description>[3/35]? Flux uncertainty</description><unit>1e-05ph.m**-2.s**-1</unit><ucd>stat.error;phot.flux</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>TB</name><description>[4.7e+08/2.4e+12] Core brightness temperature (6)</description><unit>K</unit><ucd>phys.temperature</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>Ang</name><description>[1/81]? Opening angle</description><unit>deg</unit><ucd>pos.posAng</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>dPA</name><description>? Change in jet position angle ({Delta}PA)</description><unit>deg</unit><ucd>arith.rate;pos.posAng</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>RCat</name><description>Cross-match with MOJAVE (Cat. J/AJ/137/3718) or VIPS (Cat. J/ApJ/658/203) within 3"</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Simbad</name><description>Simbad column added by the CDS</description><ucd>meta.ref</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>NED</name><description>Simbad column added by the CDS</description><ucd>meta.ref</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column></table></schema></tableset></ri:Resource>