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Selected PAIRITEL
Data Analysis Issues
Andrew Friedman (Harvard-CfA)
[email protected]
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K (JH) Transformation, Mosaics
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?)
JK (JH) Transformation, Mosaics
JK (JH) Transformation, Mosaics
Relative Image to Image Transformation Equations
Rotation Matrices
JK Transformation, Mosaics
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
Detecting Dither Problems
Normal Dither Pattern
Straying Dither Pattern
PTEL Dither pattern problematic ~Feb 10-14, 2006
Multiple telescope control daemons conflicting
New Bad Pixel Masks
0.2%  1.2%
2.2%  2.5%
1.8%  2.3%
Priority Reduction Requests Web Page
PAIRITEL Data Census (SN 2004-05)
PAIRITEL Data Census (SN 2005-06)
PAIRITEL Observations Statistics
PAIRITEL Project Statistics
Suggested Web Tools
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?