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This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDSS-II. It includes 11663 deg 2 of imaging data, with most of the ∼ 2000 deg 2 increment over the previous data release lying in regions of low Galactic latitude. The catalog(More)
We continue our series of papers on open cluster distances with a critical assessment of the accuracy of main-sequence fitting using isochrones which employ empirical corrections to the color-temperature relations. We use four nearby open clusters with multicolor photometry and accurate metallicities, and present a new metal-licity for Praesepe ([Fe/H] =(More)
The Sloan Digital Sky Survey (SDSS) started a new phase in 2008 August, with new instrumentation and new surveys focused on Galactic structure and chemical evolution, measurements of the baryon oscillation feature in the clustering of galaxies and the quasar Lyα forest, and a radial velocity search for planets around ∼8000 stars. This paper describes the(More)
For guidance on citations see FAQs. Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. ABSTRACT The Sloan Digital Sky Survey (SDSS) started a new phase in 2008 August,(More)
Thirty-eight samples of Moutan (Paeonia suffruticosa Andr.) Cortex obtained from three different regions (Southwest, East and Middle China) and two samples of unknown region were subjected to analysis with pyrolysis-high resolution gas chromatography (Py-HRGC). Each sample was thus characterized by the peak area of 41 peaks in each Py-HRGC profile.(More)
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