These are spectra obtained in followup of the Chandra Deep Field.  This
was originally served from Garching (data is still at
http://www.mpe.mpg.de/CDFS/data/fits/, the service is
ivo://www.g-vo.org/ssa.service.cdfs).  See also http://www.mpe.mpg.de/CDFS

Current registry record is
http://dc.zah.uni-heidelberg.de/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3A%2F%2Fwww.g-vo.org%2Fssa.service.cdfs

SSA metadata for the existing service is at

http://www.g-vo.org/ssampe_102/SSA?archiveid=CDFS&FORMAT=METADATA&REQUEST=queryData

The data owner was Gyula Szokoly, who's out of science.  I don't think
we need further activity once this is ready.

See also 2004ApJS..155..271S