Algorithms in SDSS DR8

General

• Bitmasks
• Survey coordinates

Images

• Imaging quality flags
• Astrometric calibration
• Sky measurement
• Creation of imaging masks
• DR7 Photometry QA description (at DR7 site)

Target selection

• Legacy Target selection
  • Main Galaxy Sample
  • Luminous Red Galaxies (LRG)
  • Quasars
  • Stars
  • ROSAT All-Sky Survey sources
  • Serendipity
• SEGUE Target Selection
• Special Target selection
• Legacy tiling (assigning fibers & plate centers)

Spectroscopy

• Wavelength Calibration
• Spectrophotometry
• Redshifts, classification, velocity dispersion
• Stellar parameters (SSPP) (in spectro pages)
• Matching spectroscopy to photometry

Image catalogs

• Photometric processing flags IMPORTANT!
  • Recommendations
  • Summary of flags
  • Photometric flags detail
  • Full flag details (link to Lupton's page)
• Resolve (removing repeat observations)
• Magnitudes
  • Fiber
  • Model
  • cModel
  • Petrosian
  • PSF
  • Radial Profiles
  • Which magnitude should I use?
• Classification & Morphology
  • Star/Galaxy Separation
  • Radial Profiles
  • Surface Brightnesses
  • Model Fits
  • Ellipticities
  • Isophotal Quantities
  • Adaptive Moments
• Conversion between SDSS ugriz and UBVR_cI_c
• ugriz colors of Vega and the Sun
• Flux calibration
  • Ubercal.
  • Converting SDSS counts to SDSS (asinh) magnitudes (and vice versa)
  • Converting SDSS to AB magnitudes
  • Converting SDSS asinh magnitudes to fluxes.
• Deblending
• Photometric redshifts
• How to reconstruct the PSF at any position