Space Warps Talk

Strong Gravitational Lens Candidates in the GOODS ACS Fields

  • Budgieye by Budgieye moderator

    enter image description here

    http://iopscience.iop.org/1538-4357/600/2/L155/fulltext/17385.html

    http://iopscience.iop.org/1538-4357/600/2/L155/pdf/17385.web.pdf

    C. D. Fassnacht Department of Physics, University of California, Davis, 1 Shields Avenue, Davis, CA 95616; fassnacht@physics.ucdavis.edu
    and
    L. A. Moustakas , S. Casertano , H. C. Ferguson , R. A. Lucas , and Y. Park 2
    Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218; leonidas@stsci.edu, stefano@stsci.edu, ferguson@stsci.edu, lucas@stsci.edu, ypark@stsci.edu
    Received 2003 May 13; accepted 2003 August 12; published 2004 January 9

    ABSTRACT

    We present results from a systematic search for strong gravitational lenses in the Great Observatories Origins Deep Survey (GOODS) Advanced Camera for Surveys (ACS) data. The search technique involves creating a sample of likely lensing galaxies, which we define as massive early-type galaxies in a redshift range 0.3 z 1.3. The target galaxies are selected by color and magnitude, giving a sample of 1092 galaxies. For each galaxy in the sample, we subtract a smooth description of the galaxy light from the z850-band data. The residuals are examined, along with true-color images created from the B435V606i775 data, for morphologies indicative of strong lensing. We present our six most promising lens candidates as well as our full list of candidates.

    Table 2

    ID R.A. (2000) Decl. (2000) zphota &thetas;E, estb B435, Ec V606, Ec i775, Ec z850, Ec Notesd

    GDS J033213-274946... 03 32 13.006 -27 49 46.08 0.55 0.96 24.82 22.35 20.93 20.48 Blob+possible CI

    GDS J033231-275612... 03 32 31.067 -27 56 12.34 0.57 0.62 25.00 23.10 21.82 21.42 Arc

    GDS J033240-274910... 03 32 39.598 -27 49 09.57 0.75 1.31 25.52 23.18 21.69 20.80 Faint CI

    GDS J123641+621125... 12 36 41.139 +62 11 25.32 ... 0.73 26.82 24.95 23.57 22.73 Faint arc

    GDS J123657+621220... 12 36 56.642 +62 12 20.45 ... 1.00 25.77 24.25 22.71 21.97 Arc

    GDS J123730+621301... 12 37 29.900 +62 13 01.15 ... 1.98 23.10 21.29 20.22 19.85 Multiple arcs (+CI?)

    Note.—Units of right ascension are hours, minutes, and seconds. Units of declination are degrees, arcminutes, and arcseconds.
    a Photometric redshifts determined as described in Mobasher et al. 2004. Photometric redshifts for the northern GOODS sources are being determined.
    b Estimated Einstein ring radius, in arcseconds.
    c Magnitude within an aperture of radius &thetas;E, est.
    d CI = counterimage.

    Posted

  • Budgieye by Budgieye moderator

    enter image description here

    http://www.galaxyzoo.org.s3.amazonaws.com/subjects/standard/goods_full_s_4793_standard.jpg

    http://talk.galaxyzoo.org/#/subjects/AGZ00082xt

    GDS J033213-274946... 03 32 13.006 -27 49 46.08 0.55 0.96 24.82 22.35 20.93 20.48 Blob+possible CI

    Posted

  • c_cld by c_cld

    GDS J123730+621301

    http://www.galaxyzoo.org/#/examine/AGZ00081ea

    AGZ00081ea

    Survey: GOODS full-depth
    Hubble ID: GDS_N_26260
    Right Ascension: 189.3745798 °
    Declination: 62.2169854 °

    Posted