Faint UBVRI CCD sequences for wide-field surveys - II. UBVR sequences at Oδ = - 30°

Scott M. Croom*, A. Ratcliffe, Q. A. Parker, T. Shanks, B. J. Boyle, R. J. Smith

*Corresponding author for this work

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    We present results from a continuing campaign to secure deep multi-colour CCD sequences for photometric calibration in UK Schmidt fields with galactic latitudes |b| > 50°. In this paper we present UBVR photometry in 12 fields and BR photometry in a further 14 fields observed within UK Schmidt survey fields centred at δ = - 30°. Photometric errors are at the 0.05 level at 20.2, 21, 20.5 and 20 mag for UBVR sequences respectively. Our observations were carried out with the 0.9-m telescope at the Cerro-Tololo Inter-American Observatory. These data are not intended for use as highly accurate individual photometric standards, but rather for use as sequences, using a large number of stars to calibrate wide-area data such as photographic plates. The data are available electronically at http:// icstar5.ph.ic.ac.uk/~scroom/phot/photom.html.

    Original languageEnglish
    Pages (from-to)592-598
    Number of pages7
    JournalMonthly Notices of the Royal Astronomical Society
    Issue number3
    Publication statusPublished - 1 Jul 1999


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    • Techniques: photometric


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