J/ApJ/866/83ivo://CDS.VizieR/J/ApJ/866/83doi:10.26093/cds/vizier.18660083CDSSwihart S.J.Strader J.Shishkovsky L.Chomiuk L.Bahramian A.,Heinke C.O.Miller-Jones J.C.A.Edwards P.G.Cheung C.C.2019-10-30T08:26:40Z2019-10-30T09:23:10ZCDS support team

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

cds-question@unistra.frx-ray-binary-starsneutron-starspulsarsinfrared-photometryvisible-astronomyWide-band photometrygamma-ray-astronomyThe Fermi {gamma}-ray source 1FGL J1417.7-4407 (J1417) is a compact X-ray binary with a neutron star primary and a red giant companion in a ~5.4 days orbit. This initial conclusion, based on optical and X-ray data, was confirmed when a 2.66ms radio pulsar was found at the same location (and with the same orbital properties) as the optical/X-ray source. However, these initial studies found conflicting evidence about the accretion state and other properties of the binary. We present new optical, radio, and X-ray observations of J1417 that allow us to better understand this unusual system. We show that one of the main pieces of evidence previously put forward for an accretion disk-the complex morphology of the persistent H{alpha} emission line-can be better explained by the presence of a strong, magnetically driven stellar wind from the secondary and its interaction with the pulsar wind. The radio spectral index derived from VLA/ATCA observations is broadly consistent with that expected from a millisecond pulsar, further disfavoring an accretion disk scenario. X-ray observations show evidence for a double-peaked orbital light curve, similar to that observed in some redback millisecond pulsar binaries and likely due to an intrabinary shock. Refined optical light-curve fitting gives a distance of 3.1+/-0.6kpc, confirmed by a Gaia DR2 parallax measurement. At this distance the X-ray luminosity of J1417 is (1.0_-0.3_^+0.4^)x10^33^erg/s, which is more luminous than all known redback systems in the rotational-powered pulsar state, perhaps due to the wind from the giant companion. The unusual phenomenology of this system and its differing evolutionary path from redback millisecond pulsar binaries points to a new eclipsing pulsar "spider" subclass that is a possible progenitor of normal field millisecond pulsar binaries.2018ApJ...866...83Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/866/83CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/183 : UBVRI Photometric Standards (Landolt 1992)VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)J/MNRAS/273/411 : Multifrequency fluxes of 280 pulsars (Lorimer+ 1995)J/A+AS/147/195 : Pulsar spectra of radio emission (Maron+, 2000)J/AJ/131/1044 : Chromospherically active stars in the Bulge (Drake, 2006)J/ApJ/709/241 : X-rays sources in NGC 6397 (Bogdanov+, 2010)J/MNRAS/428/2500 : GX 339-4 radio/X-ray flux correlation (Corbel+, 2013)J/MNRAS/432/1294 : Fermi unassociated sources ATCA observations (Petrov+, 2013)J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)J/ApJ/831/89 : Eclipsing LMXB in 3FGL J0427.9-6704 center (Strader+, 2016)J/ApJ/838/139 : Radio follow-up on 3FGL unassociated sources (Schinzel+, 2017)J/ApJ/851/31 : 2FGL J0846.0+2820 opt. counterpart follow-up (Swihart+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/866/83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/866/83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/866/83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/866/83https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/866/83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/866/83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadioInfraredOpticalGamma-raydefaultJ/ApJ/866/83/table5SMARTS photometry of 3FGL J1417.5-4402recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date of observation, BJD-2450000dtime.epochdoubleBandBroadband filter (B, V, I or H)meta.code;instr.filtercharomagApparent magnitude in Bandmagphot.magfloate_omagMagnitude error, 1-sigmamagstat.error;phot.magfloat