{
  "abstract": "We present analyses of new and archival Chandra and NuSTAR data on two old millisecond pulsars, a young highly-energetic pulsar, and a young neutron star. PSR J1810-0623 is a recently-discovered 4.55 ms radio pulsar in a binary with a possible carbon-oxygen white dwarf companion. We tentatively detect the pulsar for the first time in X-ray using a new short Chandra HRC-I observation. Its faintness suggests a distance more in accord with the further (~1 kpc) of its dispersion measure-inferred distances. PSR J1933-6211 is a 3.54 ms radio pulsar also with a carbon-oxygen white dwarf companion. Our first-time X-ray detection in an archival HRC-S image indicates its X-ray luminosity is similar to that of the 1.9 Msun pulsar PSR J1614-2230. Next, PSR J1813-1749 is a 1-2 kyr pulsar with one of the highest known spin-down luminosities. We measure its spin period of 44.7 ms using 2025 NuSTAR and 2026 Chandra ACIS-S data and update its spin evolution model. We show for the first time the pulse profile of PSR J1813-1749 at 3-79 keV, and we find that the spectra of the pulsar and pulsar wind nebula at these energies did not change significantly between observations in 2018 and 2025. Finally, for the 5-10 kyr neutron star CXOU J182913.1-125113 in the supernova remnant G18.95-1.1, we combine ACIS-I observations from 2009 and 2024 to better measure the neutron star's spectrum.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Mon. Not. R. Astron. Soc. 552, stag1650 (2026)",
  "arxiv": "2609.00176",
  "author_total": 3,
  "authors": [
    {
      "name": "Wynn C.G Ho"
    },
    {
      "name": "Patrick H Wang"
    },
    {
      "name": "Sebastien Guillot"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/12bkydp39nj4v.bib",
  "cited_by": 0,
  "doi": "10.1093/mnras/stag1650",
  "fulltext_url": null,
  "id": "12bkydp39nj4v",
  "issns": [
    "0035-8711",
    "1365-2966"
  ],
  "landing_url": "https://hal.science/hal-05735432v1",
  "language": "en",
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.astr"
    ],
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W7204648097",
  "pdf_url": "https://arxiv.org/pdf/2609.00176",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-02",
  "publisher": "Oxford University Press (OUP): Policy P - Oxford Open Option A",
  "ris": "https://research.draconitic.com/paper/12bkydp39nj4v.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:24Z",
      "native_id": "hal-05735432",
      "source": "hal",
      "url": "https://hal.science/hal-05735432v1"
    },
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2609.00176",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.00176"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Portraits of the young and old in X-ray: New millisecond pulsar detections and updated characterisation of young neutron stars",
  "title_text": "Portraits of the young and old in X-ray: New millisecond pulsar detections and updated characterisation of young neutron stars",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/12bkydp39nj4v",
  "venue": "Monthly Notices of the Royal Astronomical Society",
  "versions": [
    {
      "doi": "10.1093/mnras/stag1650",
      "pid": "12bkydp39nj4v",
      "relation": "published-as",
      "title": "Portraits of the young and old in X-ray: New millisecond pulsar detections and updated characterisation of young neutron stars",
      "venue": "Monthly Notices of the Royal Astronomical Society"
    }
  ]
}