J/ApJ/605/759ivo://CDS.VizieR/J/ApJ/605/759doi:10.26093/cds/vizier.16050759CDSBhat N.D.R.Cordes J.M.Camilo F.Nice D.J.Lorimer D.R.2018-01-08T06:38:06Z2008-07-28T09:14:52ZCDS support team

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

cds-question@unistra.frpulsarsWe have made observations of 98 low Galactic latitude pulsars to measure pulse broadening caused by multipath propagation through the interstellar medium. Data were collected with the 305m Arecibo telescope at four radio frequencies between 430 and 2380MHz. We used a CLEAN-based algorithm to deconvolve interstellar pulse broadening from the measured pulse shapes. We employed two distinct pulse-broadening functions (PBFs): PBF_1_ is appropriate for a thin screen of scattering material between the Earth and a pulsar, while PBF_2_ is appropriate for scattering material uniformly distributed along the line of sight from the Earth to a pulsar. We found that some observations were better fitted by PBF_1_ and some by PBF_2_. Pulse-broadening times ({tau}_d_) are derived from fits of PBFs to the data and are compared with the predictions of a smoothed model of the Galactic electron distribution. Several lines of sight show excess broadening, which we model as clumps of high-density scattering material.2004ApJ...605..759Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/605/759CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.atnf.csiro.au/research/pulsar/psrcat : ATNF Pulsar Cataloguehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/605/759https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/605/759http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/605/759https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/605/759https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/605/759http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/605/759GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/605/759/position (Pulsar positions (from Simbad))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/605/759/position?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/605/759/position?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/605/759/position?GETtext/xml+votable180.050000true282.18258.4433330.0055555555555555565/7648 7654 6/12911 12960 12961 12964 30298 30309 30315 30316 30318 30319 30328 30330 30332 30333 30334 30404 30407 30417 30419 30420 30424 30425 30428 30430 30461 30505 30597 30598 30601 30603 30604 30606 30607 30610 30622 30623 30624 30630 30631 30641 30644 30646 30651 30652 30669 30671 30690 30691 30693 30694 30696 30698 30700 30702 30705 30711 30714 30719 32085 32087https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/605/759?format=asciiRadiodefaultJ/ApJ/605/759/positionPulsar positions (from Simbad)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPSRPulsar identificationmeta.id;meta.maincharprimaryRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainSimbadSimbad column added by the CDScharJ/ApJ/605/759/table2New measurements of pulse-broadening times and predictions from the electron density modelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPSRPulsar identificationmeta.id;meta.maincharn_PSR[mi] Type of pulse (1)meta.notecharRefReference to pulsar parameters (2)meta.refintRefFreqFrequency band of the survey that discovered the pulsarMHzem.freqintPer? Pulse periodmssrc.var.pulsefloatnullableDM? Dispersion measurepc.cm**-3phys.dispMeasure;instr.dispersionfloatnullableFreq? Observation frequencyMHzem.freq;obsintnullablel_PBF1tLimit flag on PBF1tmeta.code.errorcharPBF1t? PBF_1_ broadening timemstime.intervalfloatnullablef_PBF1t[bcde] Flag on PBF1t (3)meta.codechare_PBF1t? Uncertainty in PBF1tmsstat.errorfloatnullablePBF1f? PBF_1_ figure of meritstat.fit.paramfloatnullablel_PBF2tLimit flag on PBF2tmeta.code.errorcharPBF2t? PBF_2_ broadening timemstime.intervalfloatnullablef_PBF2t[bcde] Flag on PBF2t (3)meta.codechare_PBF2t? Uncertainty in PBF2tmsstat.errorfloatnullablePBF2f? PBF_2_ figure of meritstat.fit.paramfloatnullablel_tc93Much less than limit flag on tc93meta.code.errorchartc93? Pulse broadening using the TC93 modelmstime.intervalfloatnullablel_ne2001Much less than limit flag on ne2001meta.code.errorcharne2001? Pulse broadening using the NE2001 modelmstime.intervalfloatnullable