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    The Radio Variability of the Gravitational Lens PMN J1838−3427

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    Winn_2004_AJ_128_2696.pdf (310.1Kb)
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    https://iopscience.iop.org/article/10.1086/425881
    Permanent Link
    https://doi.org/10.1086%2F425881
    http://hdl.handle.net/11603/18499
    http://simbad.u-strasbg.fr/simbad/sim-ref?querymethod=bib&simbo=on&submit=submit+bibcode&bibcode=2004AJ....128.2696W
    https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Search&refcode=2004AJ....128.2696W
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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 Physics Department
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    Author/Creator
    Winn, Joshua N.
    Lovell, James E. J.
    Bignall, Hayley
    Gaensler, Bryan M.
    Getts, Tracy J.
    Kedziora-Chudczer, Lucyna
    Ojha, Roopesh
    Reynolds, John E.
    Tingay, Steven J.
    Tzioumis, Tasso
    Date
    2004-12-01
    Type of Work
    8 pages
    Text
    journal articles
    Citation of Original Publication
    Joshua N. Winn et al.,The Radio Variability of the Gravitational Lens PMN J1838−3427,The Astronomical Journal, Volume 128, Number 6, https://doi.org/10.1086%2F425881
    Rights
    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.
    © 2004. The American Astronomical Society. All rights reserved.
    Abstract
    We present the results of a radio variability study of the gravitational lens PMN J1838-3427. Our motivation was to determine the Hubble constant by measuring the time delay between variations of the two quasar images. We monitored the system for 4 months (approximately 5 times longer than the expected delay) using the Australia Telescope Compact Array at 9 GHz. Although both images were variable on a timescale of a few days, no correlated intrinsic variability could be identified, and therefore no time delay could be measured. Notably, the fractional variation of the fainter image (8%) was greater than that of the brighter image (4%), whereas lensed images of a point source would have the same fractional variation. This effect can be explained, at least in part, as the refractive scintillation of both images due to the turbulent interstellar medium of the Galaxy.


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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.