J/ApJ/470/864ivo://CDS.VizieR/J/ApJ/470/864doi:10.26093/cds/vizier.14700864CDSBlum R.D.Sellgren K.Depoy D.L.2017-12-18T07:57:02Z2001-12-16T19:59:41ZCDS support team

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

cds-question@unistra.frstellar-associationsinfrared-photometryinterstellar-reddeningJ, H, K, and L photometry for the stars in the central ~2' (~5pc) of the Galaxy are presented. Using the observed J-H, H-K, and K-L colors and assumed intrinsic colors, we determine the interstellar extinction at 2.2mm (A_K_) for approximately 1100 individual stars. The mean A_K_ (=3.3mag) is similar to previous results, but we find that the reddening is highly variable, and some stars are likely to be seen through A_K_>6mag. The dereddened K-band luminosity function points to a significantly brighter component to the stellar population (>1.5mag at K) than found in the stellar population in Baade's window, confirming previous work done at lower spatial resolution. The observed flux of all Galactic center stars with estimated K0 (dereddened magnitude) =<7.0mag is ~25% of the total in the 2'x2' field. The data were obtained in July 11-13 on the 4m telescope at the Cerro Tololo Observatory (CTIO) using the Ohio State Infrared Imager qnd Spectrometer (OSIRIS). Our observations confirm the recent finding that several bright M stars in the Galactic center are variable. Our photometry also establishes the near-infrared variability of the M1-2 supergiant, IRS 7.1996ApJ...470..864Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/470/864CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/368/835 : Soft X-ray sources in the GC region (Sidoli+, 2001)J/A+A/373/608 : Early-type stars towards the GC. II. (Dufton+, 2001)J/A+AS/92/43 : Radio Obs. of OH/IR stars close to GC (Lindqvist+ 1992)J/A+AS/97/587 : JHK photometry of Galactic center stars (Ruelas-Mayorga+ 1993)J/A+AS/128/35 : New Sample of OH/IR stars in GC (Sjouwerman+ 1998)J/AJ/106/2291 : UBV photometry toward Galactic Center (Reed 1993)J/ApJ/523/248 : Variable stars in the Galactic center (Ott+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/470/864https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/470/864http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/470/864https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/470/864https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/470/864http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/470/864GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/470/864/table1 (Galactic center observed photometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/470/864/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/470/864/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/470/864/table1?GETtext/xml+votable180.050000true266.4038853-29.00840220.0055555555555555566/288307.952274030004205e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/470/864?format=asciiInfrareddefaultJ/ApJ/470/864/notesNotes to table1.datrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoteSymbol used in table1meta.notecharTextText of notemeta.notecharJ/ApJ/470/864/table2Variable stars in the Galactic CenterrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (IRS 7, 9 and 12N)meta.id;meta.maincharJmag? J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag? K magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? rms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatnullableObsObservation datetime.epoch;obsSetData set (1)meta.idcharFiltFilters used to derive J, H, and K magnitudes (2)meta.code;instr.filtercharJ/ApJ/470/864/table4Galactic Center reddening-corrected photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[BSD96]Sequential numbermeta.recordintNameName (G1)meta.idcharn_Name[*] Individual note on IRS 10EL (1)meta.notecharK0magDereddened K magnitude (2)magphot.mag;em.IR.Kfloate_K0magrms uncertainty on K0magmagstat.error;phot.mag;em.IR.KfloatAKAbsorption in K band (3)magphys.absorptionfloate_AK? rms uncertainty on AKmagstat.errorfloatnullable(J-K)0? Dereddened J-K colour index (2)magphot.color;em.IR.J;em.IR.Kfloatnullablee_(J-K)0? rms uncertainty on (J-K)0magstat.errorfloatnullable(H-K)0? Dereddened H-K colour index (2)magphot.color;em.IR.H;em.IR.Kfloatnullablee_(H-K)0? rms uncertainty on (H-K)0magstat.errorfloatnullable(K-L)0? Dereddened K-L colour index (2)magphot.color;em.IR.K;em.IR.3-4umfloatnullablee_(K-L)0? rms uncertainty on (K-L)0magstat.errorfloatnullableNotesNotes (4)meta.notecharJ/ApJ/470/864/table1Galactic center observed photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[BSD96]Sequential numbermeta.recordintprimaryn_[BSD96][*] *: variable star, in table2.dat filemeta.notecharNameName (G1)meta.idcharoRAOffset in right ascension from IRS 7 (2)arcsecpos.eq.ra;arith.difffloatoDEOffset in declination from IRS 7 (2)arcsecpos.eq.dec;arith.difffloatKmagK magnitude (3)magphot.mag;em.IR.Kfloate_Kmagrms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatJ-K? J-K colour index (3)magphot.color;em.IR.J;em.IR.Kfloatnullablee_J-K? rms uncertainty on J-Kmagstat.error;phot.color;em.IR.JfloatnullableH-K? H-K colour index (3)magphot.color;em.IR.H;em.IR.Kfloatnullablee_H-K? rms uncertainty on H-Kmagstat.error;phot.color;em.IR.HfloatnullableK-L? K-L colour index (3)magphot.color;em.IR.K;em.IR.3-4umfloatnullablee_K-L? rms uncertainty on K-Lmagstat.error;phot.color;em.IR.KfloatnullableNotesComma-separated notes, see file notes.datmeta.notecharSimbadSimbad column added by the CDSmeta.refchar_RAPosition (computed from oRA and oDE, assuming IRS7 at 17:45:39.987-29:00:22.24 (right ascension part)degpos.eq.ra;meta.main_DEPosition (computed from oRA and oDE, assuming IRS7 at 17:45:39.987-29:00:22.24 (declination part)degpos.eq.dec;meta.main