Making Press Release Astronomical Images NVO Compliant Lisa M. Frattare Space Telescope Science...
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Transcript of Making Press Release Astronomical Images NVO Compliant Lisa M. Frattare Space Telescope Science...
Making Press Release Astronomical Images
NVO Compliant
Lisa M. FrattareSpace Telescope Science Institute
Communicating Astronomy with the PublicJune 14 - 17, 2005ESO – Garching
CAP - ESO Garching June 05 L. Frattare
NVO
National Virtual ObservatoryNational 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 RequirementsStandards to Meet the Compliance Requirements
This 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 Selection2) 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