J/A+A/636/A36ivo://CDS.VizieR/J/A+A/636/A36doi:10.26093/cds/vizier.36360036CDSLafarga M.Ribas I.Lovis C.Perger M.Zechmeister M.Bauer F.F.,Kuerster M.Cortes-Contreras M.Morales J.C.Herrero E.Rosich A.,Baroch D.Reiners A.Caballero J.A.Quirrenbach A.Amado P.J.,Alacid J.M.Bejar V.J.S.Dreizler S.Hatzes A.P.Henning T.,Jeffers S.V.Kaminski A.Montes D.Pedraz S.Rodriguez-Lopez C.,Schmitt J.H.M.M.2021-06-23T12:36:16Z2020-04-13T08:57:24ZCDS support team

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

cds-question@unistra.frlate-type-starsm-starsradial-velocityFor years, the standard procedure to measure radial velocities (RVs) of spectral observations consisted in cross-correlating the spectra with a binary mask, that is, a simple stellar template that contains information on the position and strength of stellar absorption lines. The cross-correlation function (CCF) profiles also provide several indicators of stellar activity. We present a methodology to first build weighted binary masks and, second, to compute the CCF of spectral observations with these masks from which we derive radial velocities and activity indicators. These methods are implemented in a python code that is publicly available. To build the masks, we selected a large number of sharp absorption lines based on the profile of the minima present in high signal-to-noise ratio (S/N) spectrum templates built from observations of reference stars. We computed the CCFs of observed spectra and derived RVs and the following three standard activity indicators: full-width-at-half-maximum as well as contrast and bisector inverse slope. We applied our methodology to CARMENES high-resolution spectra and obtain RV and activity indicator time series of more than 300 M dwarf stars observed for the main CARMENES survey. Compared with the standard CARMENES template matching pipeline, in general we obtain more precise RVs in the cases where the template used in the standard pipeline did not have enough S/N. We also show the behaviour of the three activity indicators for the active star YZ CMi and estimate the absolute RV of the M dwarfs analysed using the CCF RVs.2020A&A...636A..36Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/636/A36CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/625/A68 : Radii and masses of the CARMENES targets (Schweitzer+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/636/A36https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/636/A36http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/636/A36https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/636/A36https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/636/A36http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/636/A36GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/636/A36/tablea1 (Absolute radial velocities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/636/A36/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/636/A36/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/636/A36/tablea1?GETtext/xml+votable180.050000true1.295371745.78656670.0055555555555555566/22 131 250 497 546 624 725 778 811 1032-1033 1357 1628 1672 1822 1875 1938 2515 2545 2681 2737 2747 2922 3031 3266 3345 3374 3658 3682 3715 3791 4033 4145 4366 4444 4518 4595 4867 5000 5009 5041 5207 5241 5343 5420 5488 5534 5590 5849 6384 6552 6672 6676 6809 6894 6980 7003 7103 7181 7262 7264 7395 7428 7471 7510 7611 7775 7837 7921 7937 7940 7980 8023 8032 8123 8163 8208 8240 8281 8331 8394 8562 8627 8733 8843 8915 9188 9471 9529 9578 9597 10037 10149 10225 10278 10448 10464-10465 10694-10695 10901 10999 11044 11177 11255 11403 11671 11962 12140 12184 12191 12621 12732 12865 13085 13427 13451 13567 13688 13743 13875 13912 14277 14395 14515 14709 14781 14850 14858 14985 14993-14994 15052 15078 15346 15355 15431 15548 15602 15635 15792 15960 16041 16754 16758 17020 17271 17302 17348 17412 17606 17870 18195 18440 18496 18553 18666 18726 18761 18789 19050 19064 19131 19306 19352 19466 19879 20023 20100 20109 20311 20459 20472 20795 20896 21051 21151 21171 21427 21747 21953 21969 22014 22222 22277 22289 22309 22626 22645 22709 22807 22942 23014 23094 23363 23453 23564 23718 23731 23735 23743 23867 23910 23997 24213 24227 24231 24239 24977 24995 25009 25363 25388 25512 25528 25849 25989 26327 26487 26538 26560 26563 26583 26699 26706 26731 26757 26772 26821 26972 27201 27289 27320 27392 27419 27459 27462 27730 27734 27762 27787 27820 27912 28223 28341 28343 28548 28646 28955 29146 29170 29458 29684 30011 30429 30455 30490 30505 30771 30833 30893 31014 31019 31191 31229 31642 31686 31767 31781 31803 31811 32033 32076 32093 32115 32329 32335 32392 32458 32491 32541 32753 36732 40250 40359 40386 40435-40436 40505 40513 40610 40623 40941 44378 44518 44696 44728 44921 44936-44937 44967 48485 48500 48801 48906 48935 48958 49101https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/636/A36?format=asciidefaultJ/A+A/636/A36/tablea1Absolute radial velocitiesSimbadNameSimbad column added by the CDSmeta.idcharNameName of the star (Karmn), JHHMMm+DDMMAmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRVabsAbsolute radial velocitym/sspect.dopplerVelocinte_RVabsAbsolute radial velocity uncertainty (1)m/sstat.errorintRVccfCCF RV weighted meanm/sphys.veloc;pos.heliocentricinte_RVccfCCF RV weighted mean uncertainty (2)m/sstat.errorintsigmaRVccfCCF RV scatterm/sstat.stdevfloatsigmamaskMask zero-point uncertaintym/sstat.errorintRVgravGravitational redshift (3)m/ssrc.redshift;pos.heliocentricinte_RVgravGravitational redshift uncertaintym/sstat.errorint_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main