J/ApJS/259/60ivo://CDS.VizieR/J/ApJS/259/60doi:10.26093/cds/vizier.22590060CDSRockosi C.M.Sun Lee Y.Morrison H.L.Yanny B.Johnson J.A.,Lucatello S.Sobeck J.Beers T.C.Allende Prieto C.An D.Bizyaev D.,Blanton M.R.Casagrande L.Eisenstein D.J.Gould A.Gunn J.E.,Harding P.Ivans I.I.Jacobson H.R.Janesh W.Knapp G.R.,Kollmeier J.A.Lepine S.Lopez-Corredoira M.Ma Z.Newberg H.J.,Pan K.Prchlik J.Sayers C.Schlesinger K.J.Simmerer J.Weinberg D.H.2022-09-30T23:22:04Z2022-09-09T09:47:57ZCDS support team

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

cds-question@unistra.frvisible-astronomyspectroscopymetallicityradial-velocityglobular-star-clusterssurveysmilky-way-galaxyThe Sloan Extension for Galactic Understanding and Exploration 2 (SEGUE-2) obtained 128,288 low-resolution spectra (R~1800) of 118,958 unique stars in the first year of the Sloan Digital Sky Survey-III (2008-2009). SEGUE-2 targeted prioritized distant halo tracers (blue horizontal-branch stars, K giants, and M giants) and metal-poor or kinematically hot populations. The main goal of SEGUE-2 was to target stars in the distant halo and measure their kinematics and chemical abundances to learn about the formation and evolution of the Milky Way. We present the SEGUE-2 field placement and target selection strategies. We discuss the success rate of the targeting based on the SEGUE-2 spectra and other spectroscopic and astrometric surveys. We describe the final SEGUE-2/SDSS-III improvements to the stellar parameter determinations based on the SEGUE Stellar Parameter Pipeline. We report a (g-i) color-effective temperature relation calibrated to the IRFM. We evaluate the accuracy and uncertainties associated with these stellar parameters by comparing with fundamental parameters, a sample of high-resolution spectra of SEGUE stars analyzed homogeneously, stars in well-studied clusters, and stars observed in common by the APOGEE survey. The final SEGUE spectra, calibration data, and derived parameters described here were released in SDSS-III Data Release 9 and continue to be included in all subsequent SDSS Data Releases. Because of its faint limiting magnitude and emphasis on the distant halo, the public SEGUE-2 data remain an important resource for the spectroscopy of stars in the Milky Way.2022ApJS..259...60Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/259/60CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)V/156 : LAMOST DR7 catalogs (Luo+, 2019)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)J/ApJS/53/791 : Spectroscopy of AB stars in halo (Pier, 1983)J/AJ/90/2089 : Stars of very low metal abundance. I (Beers+, 1985)J/AJ/103/1987 : Stars of very low metal abundance (Beers+ 1992)J/A+AS/117/227 : Dwarf effective temperatures (Alonso+ 1996)J/AJ/113/806 : M-Subdwarfs (Gizis 1997)J/ApJS/123/639 : UBV photometry of metal-weak candidates (Norris+, 1999)J/AJ/117/981 : Estimation of stellar metal abundance. II. (Beers+, 1999)J/AJ/117/2308 : Spectroscopy of hot stars in the halo (Wilhelm+, 1999)J/AJ/124/1190 : Northern high proper motion stars in DSS (Lepine+, 2002)J/ApJ/588/824 : Velocities of blue stars near (l,b)=(198,-27) (Yanny+, 2003)J/AJ/127/899 : Blue HB stars in SDSS (Sirko+, 2004)J/AJ/128/245 : M giant stars in Sagittarius dwarf galaxy (Majewski+, 2004)J/A+A/439/129 : HERES II. Spectroscopic analysis (Barklem+, 2005)J/AJ/130/1177 : C and N abundances for M15 stars (Cohen+, 2005)J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)J/MNRAS/373/13 : Lower main-sequence stars parameters (Casagrande+, 2006)J/AJ/131/582 : Cool white dwarfs in the SDSS (Kilic+, 2006)J/AJ/132/714 : QUEST RR Lyrae survey. II. Halo overdensities (Vivas+, 2006)J/AJ/134/973 : SDSS Stripe 82 star catalogs (Ivezic+, 2007)J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008)J/AJ/136/2070 : SEGUE stellar param. pipeline. III. (Allende Prieto+, 2008)J/ApJ/681/1524 : Detailed abundances for 28 metal-poor stars (Lai+, 2008)J/ApJ/684/1143 : BHB candidates in the Milky Way (Xue+, 2008)J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)J/A+A/511/L10 : Abundances and space velocities of 94 stars (Nissen+, 2010)J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010)J/ApJ/714/663 : Stellar density map of the Milky Way (de Jong+, 2010)J/ApJ/731/119 : BHB candidates in Sagittarius stream (Ruhland+, 2011)J/AJ/141/175 : Abundances in M15 RGB/RHB stars (Sobeck+, 2011)J/AJ/142/126 : CN & CH in SDSS Gal. globular clusters (Smolinski+, 2011)J/AJ/145/13 : Metal-poor stars from SDSS/SEGUE. I. (Aoki+, 2013)J/ApJ/778/56 : Hamburg/ESO Survey extremely metal-poor stars (Cohen+, 2013)J/ApJ/784/170 : The SEGUE K giant survey. II. Distances. (Xue+, 2014)J/ApJ/797/21 : Carbon-enhanced metal-poor stars (Placco+, 2014)J/ApJ/797/13 : Abundances of bright metal-poor stars (Schlaufman+, 2014)J/A+A/579/A28 : Abundances of 3 CEMP stars (Bonifacio+, 2015)J/ApJ/798/110 : Equivalent widths of LAMOST metal-poor stars (Li+, 2015)J/AJ/150/77 : Catalog of hypervelocity candidate stars (Vickers+, 2015)J/A+A/593/A28 : Halo metal-poor stars chemical data (Fernandez-Alvar+, 2016)J/AJ/151/7 : Clusters observed by SDSS/SEGUE (Morrison+, 2016)J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)J/ApJ/816/80 : The SEGUE K giant survey. III. Galactic halo (Janesh+, 2016)J/MNRAS/460/1131 : Selection function of MW field stars (Stonkute+, 2016)J/ApJ/833/20 : Carbon-enhanced metal-poor star abundances (Yoon+, 2016)J/MNRAS/465/3203 : GALAH observational overview (Martell+, 2017)J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)J/ApJ/852/49 : Properties of metal-poor stars in APOGEE DR13 (Hayes+, 2018)J/ApJ/858/92 : RPA Southern Pilot Search of 107 Stars (Hansen+, 2018)J/ApJ/880/65 : LAMOST K giants in Galactic halo substructures (Yang+, 2019)http://www.sdss3.org/ : SDSS-III home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/259/60https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/259/60http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/259/60https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/259/60https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/259/60http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/259/60GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/259/60/table5 (Comparison of parameters from high-resolution and SEGUE Stellar Parameter Pipeline (SSPP) analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/259/60/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/259/60/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/259/60/table5?GETtext/xml+votable180.050000true173.86700751.14687670.005555555555555556Cone search capability for table J/ApJS/259/60/table6 (*List of cluster members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/259/60/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/259/60/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/259/60/table6?GETtext/xml+votable180.050000true259.0486943.060083060.005555555555555556Cone search capability for table J/ApJS/259/60/table9 (Comparison of SSPP and the APOGEE Stellar Parameter and Chemical Abundances Pipeline (ASPCAP; Garcia Perez+ 2016, J/AJ/151/144) parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/259/60/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/259/60/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/259/60/table9?GETtext/xml+votable180.050000true40.39766671.24197220.0055555555555555565/2338-2339 2344 2530 2536 6/27 29 50 713 2064 2066 2199 2297 4109-4110 4255 4298 4536-4537 4539-4540 4542 4746-4747 4750 4768 4772 4782-4783 4792 4934 5105 5139 5142 5144-5145 5522-5523 5528-5530 5659 5662 5680-5681 5683 5687 5908 6096 6145 6148-6149 6240-6241 6302 6351 6362 6373 6384 6386 6552 6565 6726 7257 7260 8281 8331 8335 8418 8843 8865 8870 8969 9067 9070 9153 9380 9427 9430-9431 9433 9435-9438 9578 9581 9583 9594 9607 9613 9621 9623 9629 9664 9666 9860 9949 9973 9975 10215 10293 10313-10315 10318 10336-10337 10492 10717 10862 11097 11099 11101 11393 11442-11443 11445-11449 11452-11453 11474 12320 12405-12407 12555 12656 12658 12807 12816 12818 12824 12943 13799 14022-14023 14032 14173 14175 14199 14573 14575 14915 14918 14920 14924 15551 15555 15892 16796 17253 17298 17600 17746 17758 17777 17812 17837 17982 17997-17998 18011 18033 18063 18226 18390 18519 18544 18608 18612 18771 18782 18785 18843 19029 19091 19113 19409 19599 19752 19768 21971 22341 22352 22863 22898 23043 23048 23060 23185-23186 23202 23206-23207 23209 23839 23860-23861 23863 23904 24327 24344-24346 25963 25993 26019 26027 26113-26116 26118 26120-26121 26124 26161-26164 26166 26168-26169 26171-26173 26253-26255 26264 26266 26277 26279 26542 26994 27023 27045 27322 27589 27607 27635 27641 27644 27905 27908 27911 27920 27969 27972-27973 27975 27986 28072-28073 28292 28661 30041 31417 31445-31447 31453 31528 31618-31619 31624-31625 31904 32503 32505 32517 32519 32528 32530 32536 32539 32553 32555 32672 48890-48891https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/259/60?format=asciiOpticaldefaultJ/ApJS/259/60/table5Comparison of parameters from high-resolution and SEGUE Stellar Parameter Pipeline (SSPP) analysisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadNameSimbad column added by the CDSmeta.idcharnullableIDSDSS Plate-MJD-Fiber identifiermeta.id;meta.maincharSpecSpectrograph identifiermeta.id;instrcharHRTeff[4300/6860] Effective temperature from high-resolution analysisKphys.temperature.effectiveintHRlogg[0.45/4.9] Log surface gravity from high-resolution analysislog(cm.s**-2)phys.gravityfloatHR[Fe/H][-3.73/0.31] Metallicity from high-resolution analysislog(Sun)phys.abund.FefloatHRVmicro[0.05/2.5] Microvelocity from high-resolution analysiskm/sphys.veloc.microTurbfloatSEGUETeff[4633/7073] Effective temperature from DR9 (1)Kphys.temperature.effectiveintSEGUElogg[1.26/4.47] Log surface gravity from DR9 (1)log(cm.s**-2)phys.gravityfloatSEGUE[Fe/H][-3.41/0.15] Metallicity from DR9 (1)log(Sun)phys.abund.FefloatIRFMTeff[4655/10981] Effective temperature from high resolution spectrumKphys.temperature.effectiveintS/N[21.6/112] Signal-to-Noise from high resolution spectrumstat.snrfloatSpInteractive spectrum from SDSSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullableJ/ApJS/259/60/table6*List of cluster membersSimbadNameSimbad column added by the CDSmeta.idcharnullableClusterCluster identifier (M2, M13, M15, M67, M71, M92 NGC 2158, NGC 2420 or NGC 6791)meta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlate[1960/2912] SDSS plate numbermeta.id;instr.plateintMJD[53289/54521] Modified Julian Date of SDSS observationdtime.epochintFiber[43/620] SDSS Fiber numbermeta.id;meta.mainintTeff[4292/8123] Effective temperatureKphys.temperature.effectiveintlogg[1.32/4.8] log surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H][-2.94/0.62] Metallicitylog(Sun)phys.abund.Zfloatg-r[0/1.24] The (g-r) color indexmagphot.color;em.opt.B;em.opt.RfloatSNR[10.5/84.6] Signal-to-Noise ratiostat.snrfloatRAJ2000[91.77/323.56] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-0.994/43.3] Declination (J2000)degpos.eq.dec;meta.mainSpInteractive spectrum from SDSSmeta.ref.urlcharJ/ApJS/259/60/table9Comparison of SSPP and the APOGEE Stellar Parameter and Chemical Abundances Pipeline (ASPCAP; Garcia Perez+ 2016, J/AJ/151/144) parametersSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from APOGEE names (right ascension part)degpos.eq.ra;meta.main_DEPositions from APOGEE names (declination part)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpObjIDSEGUE identifiermeta.id;meta.mainTeffADOP[4051.8/6403.4] SEGUE-2 effective temperatureKphys.temperature.effectivefloatloggADOP[0.6/4.7] SEGUE-2 log surface gravitylog(cm.s**-2)phys.gravityfloatFEHADOP[-2.51/0.63] SEGUE-2 metallicitylog(Sun)phys.abund.FefloatRV[-423.4/324.6]? SEGUE-2 final ELODIE radial velocity (ELODIERVFINAL)km/sphys.veloc;pos.heliocentricfloatnullableAPOGEEIDAPOGEE-2 identifier (2MHHMMSSss+DDMMSSs, J2000)meta.id.crosscharTeff[3745.1/7003.4] APOGEE-2 effective temperatureKphys.temperature.effectivefloatlogg[0.5/3.8]? APOGEE-2 log surface gravitylog(cm.s**-2)phys.gravityfloatnullableFEH[-2.58/0.51]? APOGEE-2 metallicitylog(Sun)phys.abund.FedoublenullableVHelio[-430.7/322] APOGEE-2 average heliocentric velocity (VHELIOAVG)km/sphys.veloc;pos.heliocentricfloatVscatter[0/43.1] Uncertainty in VHeliokm/sstat.errorfloat