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Selected PAIRITEL Data Analysis Issues Andrew Friedman (Harvard-CfA) afriedman@cfa.harvard

Selected PAIRITEL Data Analysis Issues Andrew Friedman (Harvard-CfA) afriedman@cfa.harvard.edu. www.pairitel.org. Outline 1. J K (JH) Transformations, Mosaics 2. Detecting Dither Problems 3. New Bad Pixel Masks 4. Priority Reduction Requests 5. Future Web Tools. J Band Mosaics: best quality

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Selected PAIRITEL Data Analysis Issues Andrew Friedman (Harvard-CfA) afriedman@cfa.harvard

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  1. Selected PAIRITEL Data Analysis IssuesAndrew Friedman (Harvard-CfA)afriedman@cfa.harvard.edu www.pairitel.org

  2. Outline1. JK (JH) Transformations, Mosaics2. Detecting Dither Problems3. New Bad Pixel Masks4. Priority Reduction Requests5. Future Web Tools

  3. J Band Mosaics: best quality – Most images included in mosaic H Band Mosaics: good quality – Most images included in mosaic – Better than K, but worse than J K Band Mosaics: poorest quality – In the past, sometimes fewer than half of images included in mosaic Why not use the J positions, relative image offsets to determine those for K (and H?)

  4. Relative Image to Image Transformation Equations Rotation Matrices

  5. JK Offset Rotation Angle vs. Zenith Angle JH Offset Rotation Angle vs. Zenith Angle • JK offsets independent of zenith angle • JH offsets depend on zenith angle (flexure) • Consistent with findings from 2MASS

  6. Normal Dither Pattern Straying Dither Pattern • PTEL Dither pattern problematic ~Feb 10-14, 2006 • Multiple telescope control daemons conflicting

  7. 0.2%  1.2% 2.2%  2.5% 1.8%  2.3%

  8. Web page with thumbnails of mosaic JPEGS. • List of reduced/unreduced data • Statistics for individual/all PAIRITEL projects • Automated e-mails sent to users with URL of such a page, notifications that data is ready • Suggestions?

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