Making Press Release Astronomical Images NVO Compliant Lisa M. Frattare Space Telescope Science Institute Communicating Astronomy with the Public June , 2005 ESO – Garching
CAP - ESO Garching June 05 L. Frattare NVO National Virtual Observatory National Virtual Observatory: A U.S. effort to systematically organize and make available astronomical data, images, and other content so that it can be retrieved and used by many users. Similar to VO (European effort)
CAP - ESO Garching June 05 L. Frattare Simple Image Access (SIA) Protocol Standards to Meet the Compliance Requirements T his is important for those who manufacture astronomical images from astronomical data (observatory, amateurs, image processors)
CAP - ESO Garching June 05 L. Frattare Image Compliance with NVO/VO NVO/VO compliance: press release images need World Coordinate System (WCS)
CAP - ESO Garching June 05 L. Frattare Which images to include - No artwork - No multi-image layout - No moving targets (SS objects)
CAP - ESO Garching June 05 L. Frattare A. Compare two images: 1) Reference image – FITS data(WCS) 2) Target image – press release TIFF B. Prepping the images: 1) Filter Selection 2) Combining pairs of like-filters Software to Measure WCS
CAP - ESO Garching June 05 L. Frattare FITS file prepping Recommend retrieving strongest filter (i.e. HST: broadband R, or Halpha) Combine pairs of data to remove cosmic rays (still retain the WCS)
CAP - ESO Garching June 05 L. Frattare CR
CAP - ESO Garching June 05 L. Frattare CR
CAP - ESO Garching June 05 L. Frattare CR-Combined
CAP - ESO Garching June 05 L. Frattare TIF file prepping Recommend Splitting Channels (if necessary)
CAP - ESO Garching June 05 L. Frattare Split Channels narrowband
CAP - ESO Garching June 05 L. Frattare Split Channels narrowband
Wcs. wcs.computewcs
Fit
CAP - ESO Garching June 05 L. Frattare Transformation Transformation Coefficients Voila! WCS
CAP - ESO Garching June 05 L. Frattare Requirements, Future Plans & Credits - Python-based GUI to run on all platforms - Requires Python Imaging Library (PIL) and mathplotlib - Testing Summer 2005 on STScI OPO images database - Image Comparison for Calculated WCS - Anticipated Release Date – 2006 Personnel (at STScI) - Frank Summers – project manager, database and web service development - Lisa Frattare – tool set development - Zolt Levay – HST PR procedure development - Jonathan Eisenhamer – web service deployment - Phil Hodge – programming - Kaushala Bandara (U. Toronto) – intern processing of HST PR archive images - Carol Christian – NVO EPO coordinator