...
- for preprints and scientific articles:
- 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 on ADS
- high-energy physics literature database Inspire
- for catalogues and data: extragalactic, TeV, SNR
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a. particle data group PDG catalogues of extragalactic objects, tool etc: http://ned.ipac.caltech.edu/ - b. the NASA Extragalactic Database (NED) contains info on extragalactic objects as well as tools coordinate converters, etc.
c. Catalogue of TeV sources: TeVCat
- tools: Ed Wright's cosmology calculator CosmoCalc