QSO J0019+2021 , the SIMBAD biblio

QSO J0019+2021 , the SIMBAD biblio (90 results) C.D.S. - SIMBAD4 rel 1.8 - 2026.10.18CEST10:04:01

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Keywords 		in a table in teXt, Caption, ... Nb occurence Nb objects in ref Citations
(from ADS) 		Title First 3 Authors
1977AJ.....82....1R 196 115 Interferometer observations of radio sources in clusters of galaxies. IV. RUDNICK L. and OWEN F.N.
1985AcASn..26...76C 35 1 Optical identifications of QSOs with flat radio spectra. CHU Y.-Q., ZHU X.-F. and BUTCHER H.
1986AcASn..27..151C 15 1 Optical spectra and redshifts for 15 radio sources with flat spectra. CHU Y.-Q., ZHU X.-F. and BUTCHER H.
1995MNRAS.277.1477P viz 228 166 A sample-oriented catalogue of BL Lacertae objects. PADOVANI P. and GIOMMI P.
1996A&A...309..419N 79 51 BL Lacertae objects in the ROSAT All-Sky Survey: new objects and comparison of different search techniques. NASS P., BADE N., KOLLGAARD R.I., et al.
1998MNRAS.300..790W viz 541 128 Interferometer phase calibrations sources - III. The regions +20deg ≤ delB1950 ≤ +35deg and +75deg ≤ delB1950 ≤ +90deg . WILKINSON P.N., BROWNE I.W.A., PATNAIK A.R., et al.
2002ApJS..141...13B viz 1501 304 The VLBA calibrator Survey–VCS1. BEASLEY A.J., GORDON D., PECK A.B., et al.
2002MNRAS.329..700S viz 1287 23 Automated optical identification of a large complete northern hemisphere sample of flat-spectrum radio sources with S6cm>200mJy. SNELLEN I.A.G., McMAHON R.G., HOOK I.M., et al.
2003MNRAS.341....1M viz 15       D               1 10126 328 The Cosmic Lens All-Sky Survey - I. Source selection and observations. MYERS S.T., JACKSON N.J., BROWNE I.W.A., et al.
2005A&A...440..409T viz 226 76 24 year monitoring of extragalactic sources at 22 and 37 GHz. TERAESRANTA H., WIREN S., KOIVISTO P., et al.
2005ApJ...626...95S viz 15       D               1 775 88 A northern survey of gamma-ray blazar candidates. SOWARDS-EMMERD D., ROMANI R.W., MICHELSON P.F., et al.
2006A&A...455..773V viz 108223 628 A catalogue of quasars and active nuclei: 12th edition. VERON-CETTY M.-P. and VERON P.
2008ApJS..175...97H viz 15       D               1 1626 244 CGRaBS: an all-sky survey of gamma-ray blazar candidates. HEALEY S.E., ROMANI R.W., COTTER G., et al.
2009MNRAS.392..733M viz 15       D               2 449 37 Blind and non-blind source detection in WMAP 5-yr maps. MASSARDI M., LOPEZ-CANIEGO M., GONZALEZ-NUEVO J., et al.
2009A&A...495..691M viz 15       D               2 3199 339 Roma-BZCAT: a multifrequency catalogue of blazars. MASSARO E., GIOMMI P., LETO C., et al.
2009ApJ...706L.205F           X     *   2 5 9 The first VLBI detection of an ultracool dwarf: implications for the detectability of sub-stellar companions. FORBRICH J. and BERGER E.
2010A&A...511A..53V viz 15       D               1 107473 39 The SPECFIND V2.0 catalogue of radio cross-identifications and spectra. SPECFIND meets the Virtual Observatory. VOLLMER B., GASSMANN B., DERRIERE S., et al.
2010AJ....139.1695L viz 15       D               2 280 59 The Celestial Reference Frame at 24 and 43 GHz. I. Astrometry. LANYI G.E., BOBOLTZ D.A., CHARLOT P., et al.
2010AJ....139.1713C viz 15       D               2 274 61 The Celestial Reference Frame at 24 and 43 GHz. II. Imaging. CHARLOT P., BOBOLTZ D.A., FEY A.L., et al.
2010ApJ...715..429A viz 15       D               2 812 471 The first catalog of active galactic nuclei detected by the Fermi Large Area Telescope. ABDO A.A., ACKERMANN M., AJELLO M., et al.
2010ApJS..188..405A viz 15       D               1 1513 938 Fermi Large Area Telescope First Source Catalog. ABDO A.A., ACKERMANN M., AJELLO M., et al.
2010A&A...518A..10V viz 15       D               1 168913 597 A catalogue of quasars and active nuclei: 13th edition. VERON-CETTY M.-P. and VERON P.
2011NewA...16..503M viz 15       D               1 803 14 2MASS observation of BL Lac objects II. MAO L.S.
2011ApJS..194...29R viz 15       D               1 1164 401 Blazars in the Fermi era: the OVRO 40 m telescope monitoring program. RICHARDS J.L., MAX-MOERBECK W., PAVLIDOU V., et al.
2011ApJ...741...30A viz 15       D               3 600 101 The radio/gamma-ray connection in active galactic nuclei in the era of the Fermi Large Area Telescope. ACKERMANN M., AJELLO M., ALLAFORT A., et al.
2011A&A...535A..69N viz 15       D               1 250 21 Correlation between Fermi/LAT gamma-ray and 37 GHz radio properties of northern AGN averaged over 11 months. NIEPPOLA E., TORNIKOSKI M., VALTAOJA E., et al.
2011ApJ...743..171A viz 15       D               2 977 589 The second catalog of active galactic nuclei detected by the Fermi large area telescope. ACKERMANN M., AJELLO M., ALLAFORT A., et al.
2012ApJ...744..177L viz 15       D               2 237 41 Contemporaneous VLBA 5 GHz observations of Large Area Telescope detected blazars. LINFORD J.D., TAYLOR G.B., ROMANI R.W., et al.
2012ApJS..199...31N viz 15       D               3 2260 1282 Fermi Large Area Telescope second source catalog. NOLAN P.L., ABDO A.A., ACKERMANN M., et al.
2012ApJ...757...25L viz 15       D               2 231 7 Gamma-ray loudness, synchrotron peak frequency, and parsec-scale properties of blazars detected by the Fermi Large Area Telescope. LINFORD J.D., TAYLOR G.B. and SCHINZEL F.K.
2013ApJ...767...14P viz 15       D               1 347 14 The Micro-Arcsecond Scintillation-Induced Variability (MASIV) survey. III. Optical identifications and new redshifts. PURSIMO T., OJHA R., JAUNCEY D.L., et al.
2014MNRAS.438.3058R viz 15       D               1 1414 31 Connecting radio variability to the characteristics of gamma-ray blazars. RICHARDS J.L., HOVATTA T., MAX-MOERBECK W., et al.
2014MNRAS.439..690H viz 15       D               2 1318 51 Connection between optical and γ-ray variability in blazars. HOVATTA T., PAVLIDOU V., KING O.G., et al.
2014A&A...566A..59A viz 15       D   O           1 213 35 A simultaneous 3.5 and 1.3 mm polarimetric survey of active galactic nuclei in the northern sky. AGUDO I., THUM C., GOMEZ J.L., et al.
2015ApJS..217....2M viz 94       D       C       3 2199 42 Refining the associations of the Fermi large area telescope source catalogs. MASSARO F., D'ABRUSCO R., LANDONI M., et al.
2015PASP..127..516P 16       D               2 11 1 First scientific VLBI observations using New Zealand 30 Meter Radio Telescope WARK30M. PETROV L., NATUSCH T., McCALLUM J., et al.
2015ApJS..218...23A viz 16       D               1 3140 1411 Fermi Large Area Telescope third source catalog. ACERO F., ACKERMANN M., AJELLO M., et al.
2015AJ....150...58F viz 16       D               1 3421 241 The second realization of the international celestial reference frame by very long baseline interferometry. FEY A.L., GORDON D., JACOBS C.S., et al.
2015ApJ...810...14A viz 16       D               1 1890 513 The third catalog of active galactic nuclei detected by the Fermi large area telescope. ACKERMANN M., AJELLO M., ATWOOD W.B., et al.
2015Ap&SS.357...75M viz 16       D               1 3562 223 The 5th edition of the Roma-BZCAT. A short presentation. MASSARO E., MASELLI A., LETO C., et al.
2016ApJ...820....8S viz 16       D               1 3047 91 Classification and ranking of Fermi LAT gamma-ray sources from the 3FGL catalog using machine learning techniques. SAZ PARKINSON P.M., XU H., YU P.L.H., et al.
2016ApJS..226...20F viz 16       D               2 1394 122 The spectral energy distributions of Fermi blazars. FAN J.H., YANG J.H., LIU Y., et al.
2016A&A...595A...5M viz 16       D               1 2192 40 Gaia Data Release 1. Reference frame and optical properties of ICRF sources. MIGNARD F., KLIONER S., LINDEGREN L., et al.
2017ApJS..228...22L viz 16       D               2 1528 2 Korean VLBI Network Calibrator Survey (KVNCS). 1. Source catalog of KVN single-dish flux density measurement in the K and Q bands. LEE J.A., SOHN B.W., JUNG T., et al.
2017MNRAS.466.1567L viz 16       D               1 324 1 Test of source selection for constructing a more stable and uniform celestial reference frame. LIU N., LIU J.-C. and ZHU Z.
2017ApJ...841..113M viz 16       D               1 2944 1 An investigation of blazars without redshifts: not a missing population at high redshift. MAO P. and URRY C.M.
2017MNRAS.467.4565L viz 16       D               1 1193 4 Bimodal radio variability in OVRO-40 m-monitored blazars. LIODAKIS I., PAVLIDOU V., HOVATTA T., et al.
2017ApJS..233....3T viz 16       D               2 721 23 The VLBA Extragalactic Proper Motion Catalog and a measurement of the secular aberration drift. TRUEBENBACH A.E. and DARLING J.
2018MNRAS.473.5154M viz 257       D     X   F     6 192 ~ On the incidence of Mg II absorbers along the blazar sightlines. MISHRA S., CHAND H., GOPAL-KRISHNA, et al.
2017AN....338..700M viz 16       D               1 291 ~ Simultaneous spectra and radio properties of BL Lac's. MINGALIEV M.G., SOTNIKOVA Y.V., MUFAKHAROV T.V., et al.
2018MNRAS.474.4396K viz 16       D               1 180 4 The MASIV Survey - IV. Relationship between intra-day scintillation and intrinsic variability of radio AGNs. KOAY J.Y., MACQUART J.-P., JAUNCEY D.L., et al.
2018ApJS..235...39C viz 16       D               1 1395 63 On the jet properties of γ-ray-loud active galactic nuclei. CHEN L.
2018ApJ...861..113D viz 16       D               1 581 11 Astrometric limits on the stochastic gravitational wave background. DARLING J., TRUEBENBACH A.E. and PAINE J.
2018ApJS..237...32A viz 16       D               1 2605 130 The search for spatial extension in high-latitude sources detected by the Fermi Large Area Telescope. ACKERMANN M., AJELLO M., BALDINI L., et al.
2018ApJ...866..137L viz 16       D               1 1032 70 Constraining the limiting brightness temperature and Doppler factors for the largest sample of radio-bright blazars. LIODAKIS I., HOVATTA T., HUPPENKOTHEN D., et al.
2018A&A...618A..80G viz 16       D               1 647 ~ Extragalactic radio source stability and VLBI celestial reference frame: insights from the Allan standard deviation. GATTANO C., LAMBERT S.B. and LE BAIL K.
2019ApJ...873..132M viz 16       D               1 2125 2 The precious set of radio-optical reference frame objects in the light of Gaia DR2 data. MAKAROV V.V., BERGHEA C.T., FROUARD J., et al.
2018RAA....18...56K viz 16       D               1 1421 3 On the intrinsic shape of the gamma-ray spectrum for Fermi blazars. KANG S.-J., WU Q., ZHENG Y.-G., et al.
2019ApJS..242....5X viz 16       D               1 3393 ~ Structure effects for 3417 Celestial Reference Frame radio sources. XU M.H., ANDERSON J.M., HEINKELMANN R., et al.
2019AN....340..437A viz 16       D               1 2122 ~ Optical variability of blazars. ABRAHAMYAN H.V., MICKAELIAN A.M., PARONYAN G.M., et al.
2019A&A...631A.150M viz 57       D     X         2 339 ~ The γ-ray sky seen at X-ray energies. I. Searching for the connection between X-rays and γ-rays in Fermi BL Lac objects. MARCHESINI E.J., PAGGI A., MASSARO F., et al.
2020ApJS..247...15S       D           *   2 70 31 An ALMA co(2-1) survey of nearby Palomar-Green quasars. SHANGGUAN J., HO L.C., BAUER F.E., et al.
2020ApJS..247...33A viz 16       D               1 5175 880 Fermi Large Area Telescope fourth source catalog. ABDOLLAHI S., ACERO F., ACKERMANN M., et al.
2020ApJ...892..105A viz 16       D               1 3421 235 The fourth catalog of active galactic nuclei detected by the Fermi Large Area Telescope. AJELLO M., ANGIONI R., AXELSSON M., et al.
2020ApJ...898...18R 16       D               4 55 ~ Hunting distant BL Lacertae objects with the photometric technique using Swift and SARA. RAJAGOPAL M., KAUR A., AJELLO M., et al.
2020A&A...644A.159C viz 16       D               1 4536 184 The third realization of the International Celestial Reference Frame by very long baseline interferometry. CHARLOT P., JACOBS C.S., GORDON D., et al.
2021A&A...648A.125G 17       D               1 217 ~ Characterizing the astrometric instability of extragalactic radio source positions measured with geodetic VLBI. GATTANO C. and CHARLOT P.
2021AJ....162...21B viz 17       D               5 2594 ~ Optical variability of ICRF3 quasars in the Pan-STARRS 3pi survey with Functional Principal Component Analysis. BERGHEA C.T., MAKAROV V.V., QUIGLEY K., et al.
2021MNRAS.505.4726K viz 17       D               1 2157 29 The relativistic jet dichotomy and the end of the blazar sequence. KEENAN M., MEYER E.T., GEORGANOPOULOS M., et al.
2021MNRAS.505.5853G 17       D               2 5834 ~ Artificial Neural Network classification of 4FGL sources. GERMANI S., TOSTI G., LUBRANO P., et al.
2021A&A...655A..17S viz 17       D               1 338578 3 The SPECFIND V3.0 catalog of radio continuum cross-identifications and spectra: Reaching lower frequencies. STEIN Y., VOLLMER B., BOCH T., et al.
2022ApJS..259...55N viz 17       D               1 305 7 Predicting the Redshift of Gamma-Ray Loud AGNs Using Supervised Machine Learning. II. NARENDRA A., GIBSON S.J., DAINOTTI M.G., et al.
2022A&A...660A..87B viz 17       D               2 6191 10 Machine learning methods for constructing probabilistic Fermi-LAT catalogs. BHAT A. and MALYSHEV D.
2022ApJS..260....4P viz 17       D               1 7976 3 Direction of Parsec-scale Jets for 9220 Active Galactic Nuclei. PLAVIN A.V., KOVALEV Y.Y. and PUSHKAREV A.B.
2022ApJS..260...33S viz 17       D               1 1015 3 The US Naval Observatory VLBI Spectroscopic Catalog. SEXTON R.O., SECREST N.J., JOHNSON M.C., et al.
2022ApJS..260...53A viz 17       D               1 6710 133 Incremental Fermi Large Area Telescope Fourth Source Catalog. ABDOLLAHI S., ACERO F., BALDINI L., et al.
2022ApJS..262...18Y viz 17       D               1 2709 8 The Spectral Energy Distributions for 4FGL Blazars. YANG J.H., FAN J.H., LIU Y., et al.
2022ApJS..263...24A viz 17       D               1 3828 15 The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope: Data Release 3. AJELLO M., BALDINI L., BALLET J., et al.
2023AJ....165..139D viz 17       D               1 734 5 The Celestial Reference Frame at K Band: Imaging. I. The First 28 Epochs. DE WITT A., JACOBS C.S., GORDON D., et al.
2023MNRAS.525.3201K 17       D               1 134 ~ Hunting for the candidates of misclassified sources in LSP BL Lacs using machine learning. KANG S.-J., ZHENG Y.-G. and WU Q.
2023ApJS..268...23F viz 17       D               1 2708 ~ Characterizing the Emission Region Properties of Blazars. FAN J., XIAO H., YANG W., et al.
2024MNRAS.527.4763D 18       D               2 353 ~ Constraints on redshifts of blazars from extragalactic background light attenuation using Fermi-LAT data. DOMINGUEZ A., LAINEZ M., PALIYA V.S., et al.
2024A&A...684A..93L viz 18       D               1 520 ~ VLBI position variability of AGNs is inversely correlated with their photometric variability. LAMBERT S. and SECREST N.J.
2024MNRAS.530.2282D 1940 ~ Predicting conditional probability distributions of redshifts of Active Galactic Nuclei using Hierarchical Correlation Reconstruction. DUDA J. and BHATTA G.
2024ApJ...970..136G       D           *   3 14 ~ First Detection of CO Isotopologues in a High-redshift Main-sequence Galaxy: Evidence of a Top-heavy Stellar Initial Mass Function. GUO Z., ZHANG Z.-Y., YAN Z., et al.
2024A&A...690A.111K viz 18       D               1 1011 ~ Association of the IceCube neutrinos with blazars in the CGRaBS sample. KOUCH P.M., LINDFORS E., HOVATTA T., et al.
2024ApJS..274...28C viz 108       D     X         3 4336 ~ Metrics of Astrometric Variability in the International Celestial Reference Frame. I. Statistical Analysis and Selection of the Most Variable Sources. CIGAN P., MAKAROV V.V., SECREST N.J., et al.
2024ApJ...977L..14M 18       D               1 265 ~ Partial Alignment of Astrometric Position Excursions of International Celestial Reference Frame Quasars with Radio Jet Structures. MAKAROV V.V., CIGAN P., GORDON D., et al.
2025ApJS..278...11L 19       D               2 1265 ~ Discerning Misclassified Flat-spectrum Radio Quasars from Low-frequency-peaked BL Lacertae Objects. LIANG S., YANG W.G., ZHENG Y.G., et al.
2026ApJ...997...19S 20       D               4 74 ~ Discovering High-z BL Lacs Using Swift/UVOT and SARA Observations with the Dropout Technique. SHENG Y., IMAM K., KAUR A., et al.

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