Selected PAIRITEL Selected PAIRITEL Data Analysis IssuesData Analysis Issues

Andrew Friedman (Harvard-CfA)Andrew Friedman (Harvard-CfA)afriedman@cfa.harvard.eduafriedman@cfa.harvard.edu

www.pairitel.orgwww.pairitel.org

Outline

1. JK (JH) Transformations, Mosaics2. Detecting Dither Problems3. New Bad Pixel Masks

4. Priority Reduction Requests5. Future Web Tools

JK (JH) 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?)

JK (JH) Transformation, Mosaics

JK (JH) Transformation, MosaicsRelative Image to Image Transformation Equations

Rotation Matrices

JK Offset Rotation Anglevs. Zenith Angle

JH Offset Rotation Anglevs. Zenith Angle

JK offsets independent of zenith angleJH offsets depend on zenith angle (flexure)Consistent with findings from 2MASS

JK Transformation, Mosaics

Detecting Dither Problems

Normal Dither Pattern Straying Dither Pattern

PTEL Dither pattern problematic ~Feb 10-14, 2006Multiple 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?