agn_webivo://xaovo/agn/agn/qXinjiang Astronomical Observatory,CASZhang Hailong, Cui Lang2026-07-20T19:30:16ZZhang Hailong

150 Science 1-Street, Urumqi, Xinjiang 830011, China

zhanghailong@xao.ac.cn+86 18699134012Intra-day VariablilityActive Galactic NucleiActive Galactic Nuclei (AGNs) are extragalactic objects characterized by extremely complex physical processes and strong temporal flux variability over almost the whole electromagnetic spectrum, which play a very important role in studying the formation and evolution of galaxies, cosmology and many other astrophysical problems. Flux variability is one of the most remarkable observational characteristics of AGNs and the variability time scales are from minutes to dozens of years. Multi-wavelength flux monitoring is the main means to study the nature of AGN flux variability. In order to systematically study the total flux variability of AGNs in radio band, we launched a long-term program, which is called the quasi- Simultaneous Multiwavelength Monitoring of AGNs with the Nanshan 26-m radio telescope of Xinjiang Astronomical Observatory (XAO), namely SMMAN program. The monitoring data were acquired monthly with the cross-scan mode at C-band (4.8 GHz) and K-band (23.6 GHz) for a sample of about 100 AGNs selected from Fermi-LAT suvery. Additionally, we also conducted weekly monitoring observations or Intra-Day Vairibility (IDV) observations for some of flaring Blazars to reveal their more complex variability time scales.https://data.xao.ac.cn/agn/agn/q/infoIsServedByXAO Data Center TAP service The data from XAO have been obtained with Xinjiang Nanshan 25M Radio Telescope. And all data are not in the public domain. If you want to use the data for your research, send a request to zhanghailong@xao.ac.cn.https://data.xao.ac.cn/agn/agn/q/formhttp://data.xao.ac.cn/agn/agn/q/formhttps://data.xao.ac.cn/agn/agn/q/scs.xml?http://data.xao.ac.cn/agn/agn/q/scs.xml?GETapplication/x-votable+xmlRARight Ascension (ICRS decimal)degpos.eq.rarealDECDeclination (ICRS decimal)degpos.eq.decrealSRSearch radiusdegrealobjectObject observedmeta.id;meta.maincharaccrefAccess key for the datameta.ref.urlchardate_obsObservation datedtime.obsrealresponseformatFile format requested for output.meta.code.mimecharmaxrecMaximum number of records returned. Pass 0 to retrieve service parameters.integerverbExhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns.integer180100000true111https://data.xao.ac.cn/agn/agn/q/capabilitieshttp://data.xao.ac.cn/agn/agn/q/capabilitieshttps://data.xao.ac.cn/agn/agn/q/availabilityhttp://data.xao.ac.cn/agn/agn/q/availabilityhttps://data.xao.ac.cn/agn/agn/q/tableMetadatahttp://data.xao.ac.cn/agn/agn/q/tableMetadatahttps://data.xao.ac.cn/taphttp://data.xao.ac.cn/tapRadioagnActive Galactic Nuclei (AGNs) are extragalactic objects characterized by extremely complex physical processes and strong temporal flux variability over almost the whole electromagnetic spectrum, which play a very important role in studying the formation and evolution of galaxies, cosmology and many other astrophysical problems. Flux variability is one of the most remarkable observational characteristics of AGNs and the variability time scales are from minutes to dozens of years. Multi-wavelength flux monitoring is the main means to study the nature of AGN flux variability. In order to systematically study the total flux variability of AGNs in radio band, we launched a long-term program, which is called the quasi- Simultaneous Multiwavelength Monitoring of AGNs with the Nanshan 26-m radio telescope of Xinjiang Astronomical Observatory (XAO), namely SMMAN program. The monitoring data were acquired monthly with the cross-scan mode at C-band (4.8 GHz) and K-band (23.6 GHz) for a sample of about 100 AGNs selected from Fermi-LAT suvery. Additionally, we also conducted weekly monitoring observations or Intra-Day Vairibility (IDV) observations for some of flaring Blazars to reveal their more complex variability time scales.outputActive Galactic Nuclei (AGNs) are extragalactic objects characterized by extremely complex physical processes and strong temporal flux variability over almost the whole electromagnetic spectrum, which play a very important role in studying the formation and evolution of galaxies, cosmology and many other astrophysical problems. Flux variability is one of the most remarkable observational characteristics of AGNs and the variability time scales are from minutes to dozens of years. Multi-wavelength flux monitoring is the main means to study the nature of AGN flux variability. In order to systematically study the total flux variability of AGNs in radio band, we launched a long-term program, which is called the quasi- Simultaneous Multiwavelength Monitoring of AGNs with the Nanshan 26-m radio telescope of Xinjiang Astronomical Observatory (XAO), namely SMMAN program. The monitoring data were acquired monthly with the cross-scan mode at C-band (4.8 GHz) and K-band (23.6 GHz) for a sample of about 100 AGNs selected from Fermi-LAT suvery. Additionally, we also conducted weekly monitoring observations or Intra-Day Vairibility (IDV) observations for some of flaring Blazars to reveal their more complex variability time scales.ipixq3c ipix for this row's positionQ3C_IDlongnullableraArea center RA ICRSdegpos.eq.ra;meta.mainfloatnullabledecArea center Declination ICRSdegpos.eq.dec;meta.mainfloatnullableaccrefAccess key for the datameta.ref.urlAccess.ReferencecharnullableobjectObject observedmeta.id;meta.maincharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecoverageField covered by the pointdegdoublenullabledate_obsObservation datedtime.obsfloatnullableobsurlLink to retrieve datacharnullable