The MAPCOR subsystem performs several tasks:

• calculating aperture magnitude curves-of-growth and corrections
• normalization of PSF-fit mags to aperture-corrected aperture mags
• merging Read1 sources with Read2-Read1 sources, and normalization of Read1 mags to aperture-corrected aperture mags
• "purging" bright star artifacts

Basic Documentation:

• MAPCOR Subsystem Design Specification (PostScript file)
• MAPCOR purge algorithms for Sampler Release cleanup
• MAPCOR and DB_MAPCOR purge algorithms for Second Incremental Data Release
• MAPCOR and DB_MAPCOR artifact identification algorithms and parameters for All Sky Data Release
• 2MASS All Sky Data Release Explanatory Supplement: Data Processing: Aperture Photometry and Curve of Growth Correction page
• 2MASS All Sky Data Release Explanatory Supplement: Data Processing: Artifact Identification page

Parameter Derivations:

• Mag Normalizations and Aperture Corrections:
  • Derivation of aperture corrections using 2MAPPS V2 by John Gizis -- for 2MAPPS V3
  • Derivation of PSF normalizations using 2MAPPS V2 by John Gizis -- for 2MAPPS V3
  • Derivation of Read1 normalizations using 2MAPPS V2 by John Gizis -- for 2MAPPS V3
• Artifact Identification:
  • Initial purge parameter tuning -- early processing
  • Diffraction spikes in the K band by Chas Beichman -- early processing
  • Diffraction spikes in all bands by Chas Beichman -- early processing
  • 2MAPPS Version 3.0 parameter tuning -- for 2MAPPS V3
  • 2MAPPS Version 3.0 parameter tuning Executive Summary Report -- for 2MAPPS V3

Analysis:

• Mag Normalizations and Aperture Corrections:
  • PSF mag normalization vs. image aspect ratio and shape parameter -- early results
  • PSF mag normalization over 11 photometric nights -- early results
  • Analysis of aperture corrections and PSF mag normalizations using the working database by John Gizis -- preparation for 2MAPPS V3
• Artifact Identification:
  • MAPCOR H and K Band Glint Problems -- early results
  • Summary of MAPCOR parameter validation tests after H band array swap by Raymond Tam -- Aug 1999
  • MAPCOR and DB_MAPCOR for saturated Read1 sources by Raymond Tam -- Second IDR
  • DB_MAPCOR artifact flagging in the Test Fields by Raymond Tam -- All Sky Data Release
  • DB_MAPCOR results -- All Sky Data Release
  • DB_MAPCOR and MAPCOR cautionary notes -- All Sky Data Release
  • Residual diffraction spike artifacts by Raymond Tam and Tracey Evans -- All Sky Data Release
  • Survey area blanked by bright stars by Raymond Tam -- All Sky Data Release
  • Read1 sources missing from the PSC -- All Sky Data Release
  • DB_MAPCOR results -- Working Database