3 micron imaging of the Hubble Deep Field

David W. Hogg, Gerry Neugebauer, Judith G. Cohen, Mark Dickinson, S. G. Djorgovski, Keith Matthews, B. T. Soifer

    Research output: Contribution to journalArticlepeer-review


    Images of the Hubble Deep Field (HDF) at 3.2 μm, taken with the 10 m Keck Telescope, are presented. The images cover a total area of ∼ 2.5 arcmin2. To a 5 σ limit of [3.2]tot ≈ 17.5 mag (Vega relative), 11 sources are detected, nine of which are extragalactic. The integrated galaxy number counts are therefore ∼ 1.3 × 104 deg-2 to this depth. The galaxies detected at 3.2 μm have a median redshift of z = 0.56. All 3.2 μm sources have 1.6 μm, 1.1 μm, and visual counterparts, all of fairly regular morphology; several also have 6.7 μm, 15 μm, 850 μm, 8.5 GHz, or 1.4 GHz counterparts. No sources are found that are either anomalously red or anomalously blue in their H - [3.2] color, and there are significant detections of most of the known near-infrared HDF sources for which detection in these 3.2 μm data seemed likely.

    Original languageEnglish (US)
    Pages (from-to)1519-1525
    Number of pages7
    JournalAstronomical Journal
    Issue number4
    StatePublished - Apr 2000


    • Galaxies: photometry
    • Galaxies: statistics
    • Infrared radiation
    • Techniques: photometric

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science


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