1. 14 Sep 2006NVO Summer School 20061 T HE US N ATIONAL V IRTUAL O BSERVATORY Simple SSA Query Kelly McCusker Amy Kimball Mike Koss Phil Warner Melinda Mello Jake Albretsen

2. 14 Sep 2006NVO Summer School 20062 Overview Purpose –Proof of concept of SSA protocol Data –47 FITS files, 3933 meas flux from quasars (108 diff instruments) SSA Protocol –Pos, size, band, time, format (query input) Parts of the Project –Fits data transformation –Making and populating database –Java Servlet for user input –SQL Query with user input –Query response as VOTable SSA compliant –FITS file response

3. 14 Sep 2006NVO Summer School 20063 Java for fits data transformation FITS file conversion –Quasar Study –1 source, mult instruments, mult measurements, spectra and photometry –Spectrum data model library (NVO) Read in fits and serialize to Java –Created data population script for database

4. 14 Sep 2006NVO Summer School 20064

5. 14 Sep 2006NVO Summer School 20065 User Input to Database SSA as Java Servlet Basic error checking on user inputs –Sanity checks on parameters –Still needs range checks Supports 0.95 specification JDBC access to database Simple VOTable generation

6. 14 Sep 2006NVO Summer School 20066 SQL query and VOTable output Adapted conesearch to query database for position search –Done in SQL query instead, added bandwidth, and time query. Simple VOTable generation –Provides record for matching FITS files and url

7. 14 Sep 2006NVO Summer School 20067 Science Applications

8. 14 Sep 2006NVO Summer School 20068 DEMO

9. 14 Sep 2006NVO Summer School 20069 Future Work Better Web Interface with VO plot integration File Retrieval Conformance with SSA Protocol –Support future SSA specs New Science Applications –Cross matching Register with NVO registry Security issues Ability to retrieve FITS, VOTable, or xml spectrum schema Further extensibility and general robustness