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We present an analysis of the scientific ("refereed") paper productivity ofthe current largest (diameter >8 m) ground-based optical(-infrared) telescopesduring the ten year period from 2000 to 2009. The telescopes for which we havegathered and analysed the scientific publication data are the two 10 m Kecktelescopes, the four 8.2 m Very Large Telescopes (VLT), the two 8.1 m Geminitelescopes, the 8.2 m Subaru telescope, and the 9.2 m Hobby-Eberly Telescope(HET). We have analysed the rate of papers published in various astronomicaljournals produced by using these telescopes. While the total numbers of papersfrom these observatories are largest for the VLT followed by Keck, Gemini,Subaru, and HET, the number of papers produced by each component of thetelescopes are largest for Keck followed by VLT, Subaru, Gemini, and HET. In2009, each telescope of the Keck, VLT, Gemini, Subaru, and HET observatoriesproduced 135, 109, 93, 107, and 5 refereed papers, respectively. We have shownthat each telescope of the Keck, VLT, Gemini, and Subaru observatories isproducing 2.1 +/- 0.9 Nature and Science papers annually and the rate of thesepapers among all the refereed papers produced by using that telescope is 1.7+/- 0.8 %. Extending this relation, we propose that this ratio of the number ofNature and Science papers over the number of whole refereed papers that will beproduced by future extremely large telescopes (ELTs) will be remained similar.From the comparison of the publication trends of the above telescopes, wesuggest that (i) having more than one telescope of the same kind at the samelocation and (ii) increasing the number of instruments available at thetelescope are good ways to maximize the paper productivity.

Paper Productivity of Ground-based Large Optical Telescopes from 2000 to 2009