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    The Next Geminga: Deep Multiwavelength Observations of a Neutron Star Identified with 3EG J1835+5918

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    https://iopscience.iop.org/article/10.1086/341967
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    https://doi.org/10.1086/341967
    http://hdl.handle.net/11603/19620
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    • UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
    • UMBC Joint Center for Earth Systems Technology (JCET)
    • UMBC Physics Department
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    Author/Creator
    Halpern, J. P.
    Gotthelf, E. V.
    Mirabal, N.
    Camilo, F.
    Date
    2002-06-02
    Type of Work
    4 pages
    Text
    journal articles preprints
    Citation of Original Publication
    J. P. Halpern, E. V. Gotthelf, N. Mirabal, and F. Camilo, The Next Geminga: Deep Multiwavelength Observations of a Neutron Star Identified with 3EG J1835+5918, ApJ 573 L41 (2002), doi: https://doi.org/10.1086/341967
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    This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
    © 2002. The American Astronomical Society. All rights reserved.
    Abstract
    We describe Chandra, Hubble Space Telescope (HST), and radio observations that reveal a radio-quiet but magnetospherically active neutron star in the error circle of the high-energy γ-ray source 3EG J1835+5918, the brightest of the unidentified EGRET sources at high Galactic latitude. A Chandra ACIS-S spectrum of the ultrasoft X-ray source RX J1836.2+5925, suggested by Mirabal & Halpern as the neutron star counterpart of 3EG J1835+5918, requires two components: a blackbody of T∞ ≈ 3 × 10⁵ K and a hard tail that can be parameterized as a power law of photon index Γ ≈ 2. An upper limit of d < 800 pc can be derived from the blackbody fit under an assumption of R∞ = 10 km. Deep optical imaging with the HST Space Telescope Imaging Spectrograph CCD failed to detect this source to a limit of V > 28.5, and thus fX/fV > 6000 and d > 250 pc assuming the X-ray-fitted temperature for the full surface. Repeated observations with the 76 m Lovell telescope at Jodrell Bank place an upper limit of less than 0.1 mJy on the flux density at 1400 MHz for a pulsar with P > 0.1 s and less than 0.25 mJy for a ~10 ms pulsar at the location of RX J1836.2+5925. All of this evidence points to an older, possibly more distant version of the highly efficient γ-ray pulsar Geminga as the origin of the γ-rays from 3EG J1835+5918.


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    Albin O. Kuhn Library & Gallery
    University of Maryland, Baltimore County
    1000 Hilltop Circle
    Baltimore, MD 21250
    www.umbc.edu/scholarworks

    Contact information:
    Email: scholarworks-group@umbc.edu
    Phone: 410-455-3021


    If you wish to submit a copyright complaint or withdrawal request, please email mdsoar-help@umd.edu.