Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21743442s&link_type=abstract
American Astronomical Society, AAS Meeting #217, #434.42; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We present measurements of dust reddening using the colors of stars with spectra in the Sloan Digital Sky Survey. We measure reddening as the difference between the measured colors of a star and the predicted colors, as derived from stellar parameters from the SEGUE Stellar Parameter Pipeline. We achieve uncertainties of 54, 34, 25, and 28 mmag in the colors u-g, g-r, r-i, and i-z, per star, though the uncertainty varies depending on the stellar type and the magnitude of the star. The spectrum-based reddening measurements confirm our earlier "blue tip" reddening measurements, preferring an RV = 3.1 Fitzpatrick (1999) reddening law to O'Donnell (1994) or Cardelli et al. (1989) reddening laws. We obtain a reddening law normalization within 4% of the blue tip results, despite the somewhat different sky footprint used in the two analyses.
Finkbeiner Douglas Paul
Schlafly Eddie
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