J/ApJ/935/36ivo://CDS.VizieR/J/ApJ/935/36doi:10.26093/cds/vizier.19350036CDSDe K.Mereminskiy I.Soria R.Conroy C.Kara E.Anand S.,Ashley M.C.B.Boyer M.L.Chakrabarty D.Grefenstette B.Hankins M.J.,Hillenbrand L.A.Jencson J.E.Karambelkar V.Kasliwal M.M.Lau R.M.,Lutovinov A.Moore A.M.Ng M.Panagiotou C.Pasham D.R.Semena A.,Simcoe R.Soon J.Srinivasaragavan G.P.Travouillon T.Yao Y.2024-11-06T20:26:48Z2024-06-20T07:09:02ZCDS support team

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

cds-question@unistra.frx-ray-sourcesinfrared-photometryvisible-astronomyspectroscopyinfrared-astronomyWe present the discovery and multiwavelength characterization of SRGA-J181414.6-225604, a Galactic hard X-ray transient discovered during the ongoing SRG/ART-XC sky survey. Using data from the Palomar Gattini-IR survey, we identify a spatially and temporally coincident variable infrared (IR) source, IRAS-18111-2257, and classify it as a very-late-type (M7-M8), long-period (1502{+/-}24days), and luminous (MK~-9.9{+/-}0.2) O-rich Mira donor star located at a distance of ~14.6+2.9-2.3kpc. Combining multicolor photometric data over the last ~25yr, we show that the IR counterpart underwent a recent (starting ~800days before the X-ray flare) enhanced mass-loss (reaching ~2.1x10^-5^M{sun} yr-1) episode, resulting in an expanding dust shell obscuring the underlying star. Multi- epoch follow-up observations from Swift, NICER, and NuSTAR reveal a ~200day long X-ray outburst reaching a peak luminosity of LX~2.5x1036erg/s, characterized by a heavily absorbed (NH~6x1022/cm^2^) X-ray spectrum consistent with an optically thick Comptonized plasma. The X-ray spectral and timing behavior suggest the presence of clumpy wind accretion, together with a dense ionized nebula overabundant in silicate material surrounding the compact object. Together, we show that SRGA-J181414.6-225604 is a new symbiotic X-ray binary in outburst, triggered by an intense dust-formation episode of a highly evolved donor. Our results offer the first direct confirmation for the speculated connection between enhanced late-stage donor mass loss and the active lifetimes of symbiotic X-ray binaries.2022ApJ...935...36Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/935/36CatalogResearchIsServedByTAP VizieR generic servicerelated-toIX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)II/338 : IRAS PSC/FSC Combined Catalogue (Abrahamyan+ 2015)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)VI/125 : Theoretical spectra of red giants and supergiants (Lancon+, 2007)J/A+AS/146/407 : Symbiotic stars catalogue (Belczynski+, 2000)J/A+AS/146/217 : Library Spectra (0.5 to 2.5um) of Cool Stars (Lancon+ 2000)J/ApJ/597/323 : Cool stars at the Galactic Center (Blum+, 2003)J/A+A/480/611 : XMM-Newton slew survey catalogue, XMMSL1 (Saxton+, 2008)J/MNRAS/386/313 : IR observations of Mira variables (Whitelock+, 2008)J/MNRAS/397/1177 : Swift-XRT observations of GRBs (Evans+, 2009)J/AcA/59/239 : VI light curves LMC long-period variables (Soszynski+, 2009)J/MNRAS/400/1413 : Near-IR spectra of extremely red AGB stars (Wright+, 2009)J/A+A/604/A29 : MC Type II & anomalous Cepheids PL & PR (Groenewegen+, 2017)J/AJ/154/149 : LMC NIR synoptic survey V. NIR photom of Miras (Yuan+, 2017)J/A+A/609/A114 : Local Group AGB stars & red supergiants (Groenewegen+, 2018)J/ApJS/240/21 : Symbiotic stars with 2MASS, WISE & Gaia data (Akras+, 2019)J/MNRAS/483/5150 : Variables in NGC3109 dwarf irregular galaxy (Menzies+, 2019)J/ApJ/901/L7 : NIR obs. of Gal. magnetar SGR1935+215 with PGIR (De+, 2020)J/ApJ/905/58 : Local universe with ZTF I Ca-rich gap transients (De+, 2020)J/A+A/634/A133 : X-Shooter Spectral Library (XSL). DR2 (Gonneau+, 2020)J/A+A/636/A48 : VMC Survey. XXXVII. MC AGB stars (Groenewegen+, 2020)J/MNRAS/501/2790 : Swift Bulge Survey. first X-ray results (Bahramian+, 2021)J/ApJS/257/23 : Multiwavelength obs. of Miras in the LMC (Iwanek+, 2021)J/AJ/162/187 : IRTF spectral indices for giant stars (Messineo+, 2021)J/ApJ/928/L8 : Infrared LC and spectrum of Scutum X-1 system (De+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/935/36https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/935/36http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/935/36https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/935/36https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/935/36http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/935/36GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapX-rayOpticalInfrareddefaultJ/ApJ/935/36/table1Ground-based photometry of IRAS 18111-2257, the infrared counterpart of SRGA J181414.6-225604recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochdoublel_magThe 3{sigma} upper confidence limit in magmeta.code.errorcharmagApparent magnitude from Instrmagphot.magfloate_mag? The uncertainty in magmagstat.error;phot.magfloatnullableInstrInstrument/Filter identifiermeta.id;meta.maincharJ/ApJ/935/36/table2Multi-epoch photometry of IRAS 18111-2257 from space-based instrumentsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochdoublel_magThe 3{sigma} upper confidence limit in magmeta.code.errorcharmagApparent magnitude from Instrmagphot.magfloate_mag? The uncertainty in magmagstat.error;phot.magfloatnullableInstrInstrument/Filter identifiermeta.idcharJ/ApJ/935/36/fig7The optical spectra of IRAS 18111-2257recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation date; YYYY-MM-DDtime.epoch;obscharWaveWavelength; Angstroms0.1nmem.wldoubleFluxFlux; erg/s/cm^2^/AngstromcW.m**-2.nm**-1phot.fluxdoubleJ/ApJ/935/36/fig14NIR spectra of SRGAJ181414.6-225604recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation date; YYYY-MM-DDtime.epoch;obscharWaveWavelength; Angstroms0.1nmem.wldoubleFluxFlux; erg/s/cm^2^/AngstromcW.m**-2.nm**-1phot.fluxdouble