J/ApJ/902/L46ivo://CDS.VizieR/J/ApJ/902/L46doi:10.26093/cds/vizier.19029046CDSNieder L.Clark C.J.Kandel D.Romani R.W.Bassa C.G.Allen B.,Ashok A.Cognard I.Fehrmann H.Freire P.Karuppusamy R.Kramer M.,Li D.Machenschalk B.Pan Z.Papa M.A.Ransom S.M.Ray P.S.Roy J.,Wang P.Wu J.Aulbert C.Barr E.D.Beheshtipour B.Behnke O.,Bhattacharyya B.Breton R.P.Camilo F.Choquet C.Dhillon V.S.,Ferrara E.C.Guillemot L.Hessels J.W.T.Kerr M.Kwang S.A.Marsh T.R.,Mickaliger M.B.Pleunis Z.Pletsch H.J.Roberts M.S.E.Sanpa-arsa S.,Steltner B.2022-06-13T11:37:44Z2022-05-16T08:09:20ZCDS support team

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

cds-question@unistra.frpulsarsgamma-ray-astronomyWe report the discovery of 1.97ms period gamma-ray pulsations from the 75 minute orbital-period binary pulsar now named PSRJ1653-0158. The associated Fermi Large Area Telescope gamma-ray source 4FGLJ1653.6-0158 has long been expected to harbor a binary millisecond pulsar. Despite the pulsar-like gamma-ray spectrum and candidate optical/X-ray associations-whose periodic brightness modulations suggested an orbit-no radio pulsations had been found in many searches. The pulsar was discovered by directly searching the gamma-ray data using the GPU-accelerated Einstein@Home distributed volunteer computing system (Allen+ 2013ApJ...773...91A). The multidimensional parameter space was bounded by positional and orbital constraints obtained from the optical counterpart. More sensitive analyses of archival and new radio data using knowledge of the pulsar timing solution yield very stringent upper limits on radio emission. Any radio emission is thus either exceptionally weak, or eclipsed for a large fraction of the time. The pulsar has one of the three lowest inferred surface magnetic-field strengths of any known pulsar with B_surf_~4x10^7^G. The resulting mass function, combined with models of the companion star's optical light curve and spectra, suggests a pulsar mass >~2M_{sun}_. The companion is lightweight with mass ~0.01M_{sun}_, and the orbital period is the shortest known for any rotation-powered binary pulsar. This discovery demonstrates the Fermi Large Area Telescope's potential to discover extreme pulsars that would otherwise remain undetected.2020ApJ...902L..46Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/902/L46CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/psr : ATNF Pulsar Catalogue (Manchester+, 2005)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJS/123/79 : Third EGRET catalog (3EG) (Hartman+, 1999)J/ApJS/183/46 : Fermi/LAT bright gamma-ray source list (0FGL) (Abdo+, 2009)J/ApJS/208/17 : 2nd Fermi LAT cat. of gamma-ray pulsars (2PC) (Abdo+, 2013)J/ApJ/769/108 : Optical photometry of 4 millisecond pulsars (Breton+, 2013)J/ApJ/814/128 : Timing noise & astrometry of Fermi-LAT pulsars (Kerr+, 2015)J/ApJ/820/8 : 3FGL sources statistical classifications (Saz Parkinson+, 2016)J/ApJ/879/10 : 2015-2017 LIGO obs. analysis for 221 pulsars (Abbott+, 2019)J/ApJ/872/42 : Opt. sp. of redback ms pulsar binaries (Strader+, 2019)J/ApJS/247/33 : The Fermi LAT fourth source catalog (4FGL) (Abdollahi+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/902/L46https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/902/L46http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/902/L46https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/902/L46https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/902/L46http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/902/L46GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapGamma-rayRadiodefaultJ/ApJ/902/L46/fig4*Upper limits on h_0_^95%^ in each of the 10mHz bandsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintnu[1015.4/1017.5] Start frequency of 10mHz bandHzem.freqdoubleh095[1.19/2.2] h_0_^95%^ upper limitsrc.var.amplitude;stat.maxfloatE_h095[0.2/0.43] Upper uncertainty on h095stat.error;stat.maxfloate_h095[0.21/0.44] Lower uncertainty on h095stat.errorfloat