J/ApJS/252/23ivo://CDS.VizieR/J/ApJS/252/23doi:10.26093/cds/vizier.22520023CDSSkowron D.M.Skowron J.Udalski A.Szymanski M.K.Soszynski I.,Wyrzykowski L.Ulaczyk K.Poleski R.Kozlowski S.Pietrukowicz P.,Mroz P.Rybicki K.Iwanek P.Wrona M.Gromadzki M.2021-07-05T12:30:09Z2021-05-27T13:25:44ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsextinctioninterstellar-reddeningtwo-color-diagramssurveysWe present the most extensive and detailed reddening maps of the Magellanic Clouds (MCs) derived from the color properties of Red Clump (RC) stars. The analysis is based on the deep photometric maps from the fourth phase of the Optical Gravitational Lensing Experiment (OGLE-IV), covering approximately 670deg^2^ of the sky in the Magellanic System region. The resulting maps provide reddening information for 180deg^2^ in the Large Magellanic Cloud (LMC) and 75deg^2^ in the Small Magellanic Cloud (SMC), with a resolution of 1.7'x1.7' in the central parts of the MCs, decreasing to approximately 27'x27' in the outskirts. The mean reddening is E(V-I)=0.100+/-0.043mag in the LMC and E(V-I)=0.047+/-0.025mag in the SMC. We refine methods of calculating the RC color to obtain the highest possible accuracy of reddening maps based on RC stars. Using spectroscopy of red giants, we find the metallicity gradient in both MCs, which causes a slight decrease of the intrinsic RC color with distance from the galaxy center of ~0.002mag/deg in the LMC and between 0.003 and 0.009mag/deg in the SMC. The central values of the intrinsic RC color are 0.886 and 0.877mag in the LMC and SMC, respectively.2021ApJS..252...23Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/252/23CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/121/95 : Giant stars abundances in 24 clusters (Carretta+ 1997)J/AJ/116/723 : LMC star clusters ages and metallicity (Bica+ 1998)J/AcA/49/223 : BVI photometry of OGLE LMC Cepheids (Udalski+, 1999)J/AcA/49/437 : BVI photometry of OGLE SMC Cepheids (Udalski+, 1999)J/AJ/123/855 : Magellanic Clouds Photometric Survey: the SMC (Zaritsky+, 2002)J/AJ/128/1606 : Magellanic Clouds Photometric Survey: the LMC (Zaritsky+, 2004)J/A+A/430/421 : Reddening in LMC bar region (Subramaniam, 2005)J/AJ/132/1630 : CaII spectroscopy in MC clusters (Grocholski+, 2006)J/MNRAS/377/300 : CT1 photometry in 6 SMC star clusters (Piatti+, 2007)J/MNRAS/389/678 : Extended objects in Magellanic Clouds (Bica+, 2008)J/AJ/136/1703 : Ridgelines of six intermediate-age SMC clusters (Glatt+, 2008)J/AJ/138/517 : CaII spectroscopy of SMC red giants (Parisi+, 2009)J/A+A/554/A33 : VMC Survey. VII. 30 Doradus reddening map (Tatton+, 2013)J/MNRAS/442/1680 : Red giants in SMC. Abundances (Dobbie+, 2014)J/ApJ/780/59 : Araucaria project: eclipsing binaries in SMC (Graczyk+, 2014)J/ApJ/795/108 : Stellar populations in the Magellanic bridge (Skowron+, 2014)J/A+A/591/A11 : SMC BV photometry of 9 star cluster fields (Dias+, 2016)J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)J/ApJ/832/176 : Classical Cepheids in MCs. I. LMC disk (Inno+, 2016)J/AJ/152/58 : CaII spectroscopy of SMC red giants. IV. (Parisi+, 2016)J/AcA/66/131 : VI light curves of SMC and LMC RR Lyrae (Soszynski+, 2016)J/A+A/605/A89 : Abund. of microlensed Bulge dwarf stars. VI. (Bensby+, 2017)J/AJ/154/199 : Survey of the MAgellanic Stellar History (Nidever+, 2017)J/AcA/67/363 : New star clusters in the Magellanic system (Sitek+, 2017)J/ApJ/860/1 : Radial velocity measurements of 20 EBs in LMC (Graczyk+, 2018)J/A+A/628/A51 : Magellanic Clouds reddening map (Joshi+, 2019)http://ogle.astrouw.edu.pl/cgi-ogle/get_ms_ext.py : E(V-I) Reddening Map inhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/252/23https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/252/23http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/252/23https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/252/23https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/252/23http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/252/23GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/252/23/table1 (E(V-I) reddening map based on Red Clump (RC) stars color from the OGLE-IV survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/252/23/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/252/23/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/252/23/table1?GETtext/xml+votable180.050000true84.952875-68.62035390.0055555555555555564/2065 2066 2067 2068 2069 2070 2081 2082 2112 2344 5/8215 8221 8235 8238 8239 8257 8258 8259 8284 8285 8286 8321 8322 8323 8332 8333 8334 8352 8353 8356 8452 8456 9346 9352 9354 9355 9384 9386 9728 9730 6/32855 32893 32895 32935 32939 32945 32946 32947 32950 33025 33026 33027 33148 33149 33150 33153 33156 33157 33168 33169 33172 33173 33174 33216 33217 33220 33221 33232 33281 33283 33340 33342 33344 33346 33352 33354 33417 33420 33421 33422 33812 33816 33817 33818 33828 33829 33830 33832 37412 37414 37540 37542 37548 38944 38946 38952 45332https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/252/23?format=asciidefaultJ/ApJS/252/23/table1E(V-I) reddening map based on Red Clump (RC) stars color from the OGLE-IV surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBox[3.4/27.5] Box sizearcminphys.angSizefloatRAh[-0.03/6.74] Right Ascension in decimal hour (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[-77.53/-60.62] Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainindexedE(V-I)[0/0.7] Median (V-I) color excessmagphot.color.excessfloate_E(V-I)[0.015/0.5] Lower 34% sigma uncertaintymagstat.errorfloatE_E(V-I)[0.014/0.6] Upper 34% sigma uncertaintymagstat.error;stat.maxfloat(V-I)RC[0.8/1.6] Red clump (V-I) color indexmagphot.color;em.opt.V;em.opt.Ifloat(V-I)0[0.8/0.9] Intrinsic (V-I) color indexmagphot.color;em.opt.V;em.opt.IfloatE(V-I)p[0/0.76] Peak (V-I) color excessmagphot.color.excess;stat.maxfloatE(V-I)SFD[0.02/36.3] E(V-I) based on dust infrared emissionmagphot.color.excessfloat