...
- preprint server arxiv.org: contains most articles written after ~1995 in astro-ph, hep-ph, hep-th, gr-qc,....
- astronomy and astrophysics preprints and articles on ADS
- high-energy physics literature database Inspire
- for catalogues and data: extragalactic, TeV, SNR
- - for catalogues and data: extragalactic, TeV, SNR
- particle data
group [hh] - group PDG
- catalogues of extragalactic objects, tool etc: http://ned.ipac.caltech.edu/