2026-10-11T12:37:12Zivo://org.gavo.dc/liverpool/res/rawframes/rawframes2024-12-27T08:31:02ZLiverpool Quasar Lens Monitoringliverpool.rawfraivo://org.gavo.dc/liverpool/res/rawframes/rawframesThe GAVO DC teamGoicoechea, L.J.Shalyapin, V.Gil-Merino, R.Ullán, A.The GLENDAMA Team2026-01-16T10:24:14Z2009-11-30GAVO Data Centre Team
Mönchhofstrasse 12-14, D-69120 Heidelberg
gavo@ari.uni-heidelberg.de+49 6221 54 1837quasarsstrong-gravitational-lensingobservational-cosmologyThis collection includes optical monitorings of gravitationally lensed quasars. The frames can be used to make light curves of quasar images and field objects. From quasar light curves, one may measure time delays and flux ratios, analyse variability and chromaticity, etc. These direct analyses/measurements are basic tools for different astrophysical studies, e.g., expansion rate of the Universe, mechanism of intrinsic variability in quasars, accretion disk structure, supermassive black holes, dark halos of galaxies (dust, collapsed dark matter, smoothly distributed dark matter,...)http://dc.g-vo.org/tableinfo/liverpool.rawframesIsServedByGAVO Data Center ObscoreLens Image ArchiveGAVO Data Center TAP servicehttp://dc.g-vo.org/lensunion/q/im/siap.xml?https://dc.g-vo.org/lensunion/q/im/siap.xml?GETapplication/x-votable+xmlPOSICRS Position, RA,DEC decimal degrees (e.g., 234.234,-32.46)pos.eqcharSIZESize in decimal degrees (e.g., 0.2 or 1,0.1)degcharINTERSECTRelation of image and specified Region of Interest.charFORMATRequested format of the image datachardateObsEpoch at midpoint of observationdtime;obs.exposurecharbandpassIdFree-form name of the bandpass usedinstr.bandpasscharobjectObject being observed, Simbad-resolvable formmeta.idcharRESPONSEFORMATFile 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.integerhttp://dc.g-vo.org/taphttps://dc.g-vo.org/tap2m Liverpool robotic telescope (Canary Islands, Spain)RATCam CCD camera and gri Sloan filters5/1816,1856,4804 6/4574,4593,4596-4597,8705,8707,871054009.2 54674.92.30982e-19 5.44232e-19OpticalivoaDefinition and support code for the ObsCore data model and table.ivoa.obscoreThis data collection is queryable in GAVO Data Center's obscore table.
liverpoolLiverpool Quasar Lens MonitoringThis collection includes optical monitorings of gravitationally lensed quasars. The frames can be used to make light curves of quasar images and field objects. From quasar light curves, one may measure time delays and flux ratios, analyse variability and chromaticity, etc. These direct analyses/measurements are basic tools for different astrophysical studies, e.g., expansion rate of the Universe, mechanism of intrinsic variability in quasars, accretion disk structure, supermassive black holes, dark halos of galaxies (dust, collapsed dark matter, smoothly distributed dark matter,...)liverpool.rawframesThis collection includes optical monitorings of gravitationally lensed quasars. The frames can be used to make light curves of quasar images and field objects. From quasar light curves, one may measure time delays and flux ratios, analyse variability and chromaticity, etc. These direct analyses/measurements are basic tools for different astrophysical studies, e.g., expansion rate of the Universe, mechanism of intrinsic variability in quasars, accretion disk structure, supermassive black holes, dark halos of galaxies (dust, collapsed dark matter, smoothly distributed dark matter,...)561accrefAccess key for the datameta.ref.urlAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicyrcharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.Size21196802119680.02119680.02122560.021225601.0longnullablecenteralphaApproximate center of image, RAdegpos.eq.ra138.232138.235147.843213.944340.1211doubleindexednullablecenterdeltaApproximate center of image, Decdegpos.eq.dec3.3726511.495626.597855.895655.91051doubleindexednullableimagetitleSynthetic name of the imagemeta.titlecharnullableinstidIdentifier of the originating instrumentmeta.id;instrcharnullabledateobsEpoch at midpoint of observationdtime;obs.exposure54009.254017.254156.954614.154674.91doublenullablenaxesNumber of axes in datapos.wcs.naxes22.02.02.021.0intnullablepixelsizeNumber of pixels along each of the axespixelpos.wcs.naxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixelpos.wcs.scalefloatnullablerefframeCoordinate system reference framepos.framecharnullablewcs_equinoxEquinox of the given coordinatesyrtime.equinox200020002000200020001floatnullablewcs_projectionFITS WCS projection typepos.wcs.ctypecharnullablewcs_refpixelWCS reference pixelpixelpos.wcs.crpixfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegpos.wcs.crvaldoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixelpos.wcs.cdmatrixfloatnullablebandpassidFree-form name of the bandpass usedinstr.bandpasscharnullablebandpassunitUnit of bandpass specifications (always m).charnullablebandpassrefvalCharacteristic quantity for the bandpass of the imageminstr.bandpass;stat.median4.71e-074.71e-076.18e-077.49e-077.49e-071floatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)minstr.bandpass;stat.max5.8e-075.8e-077.2e-078.6e-078.6e-071floatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)minstr.bandpass;stat.min3.65e-073.65e-075.4e-076.45e-076.45e-071floatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlymeta.codecharnullablecoverageField covered by the imagedegdoubleindexednullablecreation_dateDate of FITS file creationdtime.creationcharnullabletypeType of the observation (Science, Flat...)meta.code.classcharobjectObject observed, Simbad resolvable identifiermeta.idcharnullableraw_objectObject observed as given in the headermeta.idcharnullableobservatoryObservatory of origin for this framemeta.id;instr.obstycharnullabletelescopeTelescope used to obtain the frameinstr.telcharnullableinstrumentIdentifier of the originating instrumentcharnullabledetectorDetector usedmeta.id;instrcharnullableexposureExposure timestime.duration;obs.exposure1001001203003001floatnullableairmassAir mass at center of observationobs.airMass1.020671.04511.452.122.628361floatnullablemoonfracFraction of illuminated area of the moon at obs. timeobs.param;arith.ratio0.00036590.001574740.4467480.9978770.99981floatnullablemoondistLunar distance from targetdegpos.angDistance30.303434.147690.9128164.078169.8221floatnullablel1satIs the brightest object in the field saturated?instr.saturation;stat.maxbooleanbackgroundBackground in countsct.s**-1instr.background98.176111.519418.6557400.59205261floatnullableseeingEstimate for seeing at observation timearcsecinstr.obsty.seeing0.6147190.9027121.49773.75204278.0921floatnullablestarttimeUT at start of observationtime.startcharnullable