J/ApJ/707/89ivo://CDS.VizieR/J/ApJ/707/89doi:10.26093/cds/vizier.17070089CDSGao J.Jiang B.W.Li A.2026-05-19T14:24:40Z2012-01-26T08:32:17ZCDS support team

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

cds-question@unistra.frextinctiongalaxy-planesmilky-way-galaxyinterstellar-mediumgiant-starsinfrared-photometrysurveysBased on the data obtained from the Spitzer/Galactic Legacy Infrared Midplane Survey Extraordinaire (GLIPMSE) Legacy Program and the Two Micron All Sky Survey (2MASS) project, we derive the extinction in the four IRAC bands, [3.6], [4.5], [5.8], and [8.0]um, relative to the 2MASS Ks band (at 2.16um) for 131 GLIPMSE fields along the Galactic plane within |l|<=65{deg}, using red giants and red clump giants as tracers. As a whole, the mean extinction in the IRAC bands (normalized to the 2MASS Ks band), A_[3.6]_/A_Ks_~0.63+/-0.01, A_[4.5]_/A_Ks_~0.57+/-0.03, A_[5.8]/A_Ks_~0.49+/-0.03, A_[8.0]_/A_Ks_~0.55+/-0.03, exhibits little variation with wavelength (i.e., the extinction is somewhat flat or gray). As far as individual sightline is concerned, however, the wavelength dependence of the mid-infrared interstellar extinction A_{lambda}_/A_Ks_ varies from one sightline to another, suggesting that there may not exist a "universal" IR extinction law.2009ApJ...707...89Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/707/89CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/ApJ/658/1264 : IR-excess sources in GLIMPSE and MSX (Uzpen+, 2007)J/A+A/446/551 : Extinctions at 7um + 15um from ISOGAL survey (Jiang+, 2006)J/MNRAS/338/253 : K extinction near the Galactic Centre (Dutra+, 2003)J/A+A/349/L69 : Interstellar extinction (Schultheis+, 1999)http://www.astro.wisc.edu/sirtf/glimpsedata.html : GLIMPSE data home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/707/89https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/707/89http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/707/89https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/707/89https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/707/89http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/707/89GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/707/89/table3 (Extinction ratios A({lambda})/A(Ks) of the 131 GLIMPSE fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/707/89/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/707/89/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/707/89/table3?GETtext/xml+votable180.050000true268.3754-29.96390.0055555555555555566/12968-12969 12975 12986-12987 12990 14357 14400-14401 14404 28801-28802 28806-28807 28816-28817 28822-28823 28872-28873 28876 28879 28890 28913 28916-28917 29089 29094-29095 29106 29113 29116 29119 29162-29163 29508-29509 29520 29523 29526 29533 30216-30217 30223 30234 30257 30260 30263 30306-30307 30316-30317 30330-30331 30334 30421 30592 30598-30599 30616-30617 30620 30623 30666-30667 30692-30693 30706-30707 30710 30717 37364 37894-37895 37904 41595 41597-41598 41631 41652 41654 41657-41658 41669-41670 41673-41674 41680 41758-41759 41763-41765 41768 41777 41798 41800-41801 41809-41810 41812-41813 42154 42157-42158 42167-42168 42172 42206-42207 42210 42212-42213 42224 42375 42377 42380 42387 42390-42391 42432-42433 42437 42448 42451 42454-42455 43013-43014 43017-430187.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/707/89?format=asciiInfrareddefaultJ/ApJ/707/89/table3Extinction ratios A({lambda})/A(Ks) of the 131 GLIMPSE fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFNameField name (1)obs.fieldcharGLONlLower Galactic longitude degreedegpos.galactic.lonGLONuUpper Galactic longitude degreedegpos.galactic.lonGLATlLower Galactic latitude degreedegpos.galactic.latfloatGLATuUpper Galactic latitude degreedegpos.galactic.latfloatGA3.6IRAC [3.6] band to Ks band extinction ratio from Red Giants (2)phys.absorptionfloate_GA3.6Uncertainty in GA3.6stat.errorfloatGA4.5IRAC [4.5] band to Ks band extinction ratio from Red Giants (2)phys.absorptionfloate_GA4.5Uncertainty in GA4.5stat.errorfloatGA5.8IRAC [5.8] band to Ks band extinction ratio from Red Giants (2)phys.absorptionfloate_GA5.8Uncertainty in GA5.8stat.errorfloatGA8.0IRAC [8.0] band to Ks band extinction ratio from Red Giants (2)phys.absorptionfloate_GA8.0Uncertainty in GA8.0stat.errorfloatCA3.6IRAC [3.6] band to Ks band extinction ratio from Red Clump Giants (2)phys.absorptionfloate_CA3.6Uncertainty in CA3.6stat.errorfloatCA4.5IRAC [4.5] band to Ks band extinction ratio from Red Clump Giants (2)phys.absorptionfloate_CA4.5Uncertainty in CA4.5stat.errorfloatCA5.8IRAC [5.8] band to Ks band extinction ratio from Red Clump Giants (2)phys.absorptionfloate_CA5.8Uncertainty in CA5.8stat.errorfloatCA8.0IRAC [8.0] band to Ks band extinction ratio from Red Clump Giants (2)phys.absorptionfloate_CA8.0Uncertainty in CA8.0stat.errorfloatKsmaxMaximum Ks band magnitude for Red Clump Giantsmagphot.mag;em.IR.Kfloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed