Journal
ASTROPHYSICAL JOURNAL
Volume 822, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/0004-637X/822/2/66
Keywords
methods: data analysis; surveys; techniques: photometric
Categories
Funding
- NASA [NNX10AD69G]
- German Research Foundation (DFG) [Sonderforschungsbereich SFB 881]
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy Office of Science
- National Aeronautics and Space Administration [NNX08AR22G]
- National Science Foundation [AST-1238877]
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1238877] Funding Source: National Science Foundation
- NASA [135583, NNX10AD69G] Funding Source: Federal RePORTER
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We present a recalibration of the Sloan Digital Sky Survey (SDSS) photometry with new flat fields and zero points derived from Pan-STARRS1. Using point-spread function (PSF) photometry of 60 million stars with 16 < r < 20, we derive a model of amplifier gain and flat-field corrections with per-run rms residuals of 3 millimagnitudes (mmag) in griz bands and 15 mmag in u band. The new photometric zero points are adjusted to leave the median in the Galactic north unchanged for compatibility with previous SDSS work. We also identify transient nonphotometric periods in SDSS (contrails) based on photometric deviations co-temporal in SDSS bands. The recalibrated stellar PSF photometry of SDSS and PS1 has an rms difference of {9, 7, 7, 8} mmag in griz, respectively, when averaged over 15' regions.
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