J/A+A/275/549ivo://CDS.VizieR/J/A+A/275/549doi:10.26093/cds/vizier.32750549CDSJenniskens P.Greenberg J.M.1997-12-09T16:13:23Z1997-12-09T17:13:20ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frextinctionultraviolet-photometryThe data are a decomposition of the extinction curves published by Aiello S., Barsella B., Chlewicki G., Greenberg J.M., Patriarchi P., and Perinotto M. (1988A&AS...73..195A) in the parameter scheme of Fitzpatrick E.L. and Massa D. (1988ApJ...328..734F). Each extinction curve k(x) = (A(lambda)-A(V))/(A(B)-A(V)) is given by: k(x) = c1 + c2*x + c3* D(x,x0,y) + c4*F(x) Where x = 1/wavelength (in inverse micron), D is a Drude profile: D(x,x0,y) = x^2^/((x^2^-x0^2^)^2^ + y^2^x^2^) and F is a polynomial of order 3: F(x) = 0.05392(x-5.9)^2^ + 0.0564(x-5.9)^3^ for 5.9<x<8.0 F(x) = 0 for x<5.9 In this scheme the parameters have the following meaning: c1: related directly to c2 because of normalisation k(x) c2: slope of the linear rise ( mag/E(B-V) ) y: width of the bump (inverse micron) c3: c3/y^2^ is bump height, pi*c3/(2.*y) is bump area x0: position of the bump (inverse micron) c4: amount of FUV non-linear rise contribution: at 8 mu^-1^: 2.9c4 (mag/E(B-V)) | * ^ | * 2.9c4 | ^ * * k(x)| c3/y^2 * * * .. v | *< y >* *.. | v * .. * * | *.. c2 1 | * 0 | * |^ * |Rv * |v____________________________|_____________________________ V B x0 5.9 8.0 x=1/wavelength (1/micron) Values of Rv, the ratio of total to selective extinction, can be found in Aiello et al. (1988A&AS...73..195A).1993A&A...275..549Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/275/549CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/275/549https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/275/549http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/275/549https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/275/549https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/275/549http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/275/549GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVdefaultJ/A+A/275/549/tableExtinction coefficientsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintstarnameDesignation of star.meta.id;meta.mainchark(U)? Extinction in U bandobs.atmos.extinctionfloatc1Coefficient (see text)stat.fit.paramfloatc2Coefficient (see text)umstat.paramfloatc3Coefficient (see text)stat.fit.paramfloatc4Coefficient (see text)stat.fit.paramfloatyWidth of the bumpum**-1phys.absorption.coefffloatx0Position of the bumpum**-1phys.absorption.coefffloatchisqIndication of the deviation between fitted curve and actual datastat.fit.paramfloatQQuality indication of the data (1)meta.code.qualintIPSC[0/2] IRAS point source classification (2)src.classintTYPEEnvironment characterisation from IRAS Skyflux maps (3)src.morph.typechar