Improved photometric calibrations for red stars observed with the SDSS photometric telescope

James R.A. Davenport, John J. Bochanski, Kevin R. Covey, Suzanne L. Hawley, Andrew A. West, Donald P. Schneider

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Abstract

We present a new set of photometric transformations for red stars observed with the Sloan Digital Sky Survey (SDSS) 0.5 m Photometric Telescope (PT) and the SDSS 2.5 m telescope at the Apache Point Observatory in New Mexico. Nightly PT observations of US Naval Observatory standards are used to determine extinction corrections and calibration terms for SDSS 2.5 m photometry. Systematic differences between the PT and native SDSS 2.5 m ugriz photometry require conversions between the two systems which have previously been undefined for the reddest stars. By matching ∼43,000 stars observed with both the PT and SDSS 2.5 m, we extend the present relations to include low-mass stars with colors 0.6 ≤ r - i ≤ 1.7. These corrections will allow us to place photometry of bright, low-mass trigonometric parallax stars previously observed with the PT on the 2.5 m system. We present new transformation equations and discuss applications of these data to future low-mass star studies using the SPSS.

Original languageEnglish (US)
Pages (from-to)2430-2434
Number of pages5
JournalAstronomical Journal
Volume134
Issue number6
DOIs
StatePublished - Dec 1 2007

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All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Davenport, J. R. A., Bochanski, J. J., Covey, K. R., Hawley, S. L., West, A. A., & Schneider, D. P. (2007). Improved photometric calibrations for red stars observed with the SDSS photometric telescope. Astronomical Journal, 134(6), 2430-2434. https://doi.org/10.1086/522054