1. Data Pipeline Wei Zheng Johns Hopkins University

2. Requirements Science images for ACS/WFC, WFC3/UVIS and WFC3/IR Detection image over all bands Filter Images with a common WCS grid Source catalogs Photometric redshift catalogs September 20, 2010Granada

3. APSIS Image registration Sky subtraction Distortion correction Cosmic ray rejection Edge mask Astrometric correction Detection image September 20, 2010Granada Extinction correction Extractor source catalogs Multicolor catalog BPZ catalog

4. Modification ACEX: ACS image drizzling WFEX: WFC3 image (UVIS and IR) drizzling DREX: Register images of different passbands September 20, 2010Granada

5. Check data on CLASH central storage via fast-track ftp No All data present? Flowchart Yes WFC3 or ACS? Run ACEX Run WFEX ACS WFC3 Run ACEX Run WFEX Image Align Image Combine.felt files Image Align Image Combine Run DREX (0.065”) Master Detection Image Co-added images in native resolution Extractor Source Catalogs in each passband Multi-color catalog PHOTO-Z Code(s) Co-added images on common pixel grid PHOTO-Z Catalog CLASH Science Team Data Archive

6. Astrometric Accuracy September 20, 2010Granada WFEXWFC3RED

7. Pipeline Output: Images Detection Image (0.065” scale) Combined images in each band (0.065” scale) Combined UVIS and WFC images in original scale September 20, 2010Granada

8. Pipeline Output: Catalogs Running Sextractor Source catalogs in each band Multicolor catalog Photometric redshifts Mag_iso, mag_auto, and mag_aper at various sizes. September 20, 2010Granada

9. Processing Plan One run for every visit Accumulated data for each version Typically eight versions of processed data per cluster The final version has the best quality September 20, 2010Granada

10. Further improvements Slight alignment on drizzled images Flag and mask consolidation CTE correction for ACS Data server September 20, 2010Granada

11. Summary A working pipeline Need more in-depth comparisons and quality checks Need to accommodate new science requirements September 20, 2010Granada

12. Many Thanks! Amit Saraff John Blakeslee, Larry Bradley Warren Hack, Andy Fruchter September 20, 2010Granada