1. HYPERCALIBRATION: A PAN-STARRS1-BASED RECALIBRATION OF THE SLOAN DIGITAL SKY SURVEY PHOTOMETRY
- Author
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Finkbeiner, Douglas P, Schlafly, Edward F, Schlegel, David J, Padmanabhan, Nikhil, Jurić, Mario, Burgett, William S, Chambers, Kenneth C, Denneau, Larry, Draper, Peter W, Flewelling, Heather, Hodapp, Klaus W, Kaiser, Nick, Magnier, EA, Metcalfe, N, Morgan, Jeffrey S, Price, Paul A, Stubbs, Christopher W, and Tonry, John L
- Subjects
Space Sciences ,Physical Sciences ,methods: data analysis ,surveys ,techniques: photometric ,astro-ph.IM ,Astronomical and Space Sciences ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Physical Chemistry (incl. Structural) ,Astronomy & Astrophysics ,Astronomical sciences ,Particle and high energy physics ,Space sciences - Abstract
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 non-photometric 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.
- Published
- 2016