J/A+A/561/A137ivo://CDS.VizieR/J/A+A/561/A137doi:10.26093/cds/vizier.35610137CDSReig P.Zezas A.2019-03-21T05:50:18Z2014-01-24T08:00:39ZCDS support team

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

cds-question@unistra.frx-ray-binary-starsspectroscopyPresent X-ray missions are regularly discovering new X-ray and gamma-ray sources. The identification of their counterparts at other wavelengths allows us to determine their nature. The main goal of this work is to determine the properties of the optical counterpart to the INTEGRAL source IGR J21343+4738, and to study its long-term optical variability. Although its nature as a Be/X-ray binary has been suggested, little is known about its physical parameters. We have been monitoring IGR J21343+4738 since 2009 in the optical band. We present BVRI optical photometric and spectroscopic observations covering the wavelength band 4000-7500{AA}. The photometric data allowed us to derive the colour excess E(B-V) and estimate the distance. The blue-end spectra were used to determine the spectral type of the optical companion, while the spectra around the Halpha line allowed us to study the long-term structural changes in the circumstellar disc.2014A&A...561A.137Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/561/A137CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/561/A137https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/561/A137http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/561/A137https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/561/A137https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/561/A137http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/561/A137GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapAssociated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/561/A137defaultJ/A+A/561/A137/listList of spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation date (2008 to 2013)time.epoch;obsnullableTel[sfw] Telescope used (1)instr.setupcharr/b[rb] (r)ed or (b)lue end spectrummeta.codecharlam.min[3797/6370] Wavelength interval lower value0.1nminstr.bandwidthfloatlam.max[4669/7600] Wavelength interval upper value0.1nminstr.bandwidthfloatDlamWavelength step0.1nmspect.resolutiondoubleNxNumber of pixels along X-axismeta.numberintNy? Number of spectrameta.numberintnullablespShow the spectrummeta.ref.urlcharFileNameName of the FITS spectrum in subdirectory spmeta.id;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar