Telescope Bibliometrics 101


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Presentation given at Future Professional Communication in Astronomy II, April 2010, Cambridge, MA, USA. Authors; Uta Grothkopf & Jill Lagerstrom

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Telescope Bibliometrics 101

  1. 1. Telescope Bibliometrics 101 Uta Grothkopf & Jill Lagerstrom ESO Library STScI Library
  2. 2. Overview• Bibliometric Studies ! What are they? ! Who is interested?• Linking Publications and Data ! Access how and where?• Telescope Bibliographies ! Who compiles them? How? ! Current tools, methodologies, features ! What’s next?FPCA-II, Cambridge, MA, April 2010
  3. 3. Bibliometric studies• Metrics to measure productivity and impact through publications and citations• Long history (1960ies: Science Citation Index)• Large number of articles on this topic
  4. 4. Typical measures Good Bad # Publications productivity no impact # Citations impact can be inflated Mean / median allows comparison of rewards low productivity cites per paper different ages ‘High-Impact Papers’ shows trends favors ‘hot topics’ determined by years of h-index productivity + impact operationFPCA-II, Cambridge, MA, April 2010
  5. 5. Typical measures Good Bad # Publications productivity no impact are ! c # Citations impact can be inflated mean / median ew ith allows comparison of dl rewards low productivity n cites per paper different ages Ha ‘High-Impact Papers’ shows trends favors ‘hot topics’ determined by years of h-index productivity + impact operationFPCA-II, Cambridge, MA, April 2010
  6. 6. Who is interested?Scientists, management, governing bodies, funding agencies who want to... ! Evaluate performance of telescopes and instruments ! Measure scientific output from observing programs ! Define guidelines for future facilities ! Compare in-house facilities with other observatories and telescopes ! Interconnect resources (Virtual Observatory) Observing programs Maximum return of science benefits from observing proposals Telescope bibliography Data archive Papers
  7. 7. Linking publications and data (1) Access through observatories’ web sites
  8. 8. Example: Chandra
  9. 9. Example: HST
  10. 10. Example: ESO
  11. 11. Example: ESO Programs used in papers
  12. 12. Example: ESO Access to proposal information
  13. 13. Example: ESO Request data Other papers based on same program
  14. 14. Linking publications and data (2) At the ADS / Filters sectionFPCA-II, Cambridge, MA, April 2010
  15. 15. Linking publications and data (2) Access through the ADS / Filters sectionFPCA-II, Cambridge, MA, April 2010
  16. 16. Prerequisites for telescope bibliographiesAccess to literature Semi-automated search tool Policy / selection criteria Data archive Tags / keywords / programs Database Programs Tags
  17. 17. Prerequisites for telescope bibliographies And staff !
  18. 18. Who compiles telescope bibliographies?• 2010 Survey by J. Lagerstrom, STScI Library Respondents: CFHT, Chandra, FUSE/Galex/IUE, ESO, Gemini, HST, ING, Keck, NOAO, NRAO, SDSS, Spitzer, Subaru, XMM Newton• Who does it? How many people are involved? 4 3 Technicalstaff Technical staff Admin.Asst. Admin. Asst. Library assistant Library assistant 2 Archivestaff Archive staff Astronomer Astronomer Librarian Librarian 1 0
  19. 19. Which sources?• 30+ journals listed, only 4 in common A&A AJ ApJ / ApJS MNRAS• Print journals E-journals (pdfs) } Access to entire text of papers (incl. footnotes, figures, captions etc.) Journals’ web sites Entire article? ADS abstracts Only title, abstract, selected footnotes Self-reporting Rely on PIs / authors
  20. 20. Search strategies• Observatory, telescope, instrument names• Science programs, surveys, archive names• Geographic locations• Concepts• Challenges: ! papers: missing references to obs identifiers ! publisher restrictions for downloading papers ! central full-text search feature at ADS?
  21. 21. Tools of the tradeFull-text search tool (FUSE) Users: ESO, STScI, Gemini, Subaru, Carnegie Obs. coming soon: IUCAA
  22. 22. Tools of the tradeESO Telescope Bibliography (telbib)
  23. 23. Tools of the tradeESO Telescope Bibliography (telbib) Users: ESO, NRAO
  24. 24. Author affiliations CitationsBibliographic PubMonth details + metadata from ADS Tags / keywords proIDs ObsMode ObsType
  25. 25. Statistics / reports• Basic ESO Statistics ! Publication + citation statistics ! ESO and other observatories ! ESO Top 20 ! Instruments’ pub stats ! Further reading• regularly updated• other reports on demandFPCA-II, Cambridge, MA, April 2010
  26. 26. What’s next?• Citations are problematic ! Incompleteness: listings often incomplete ! Incorrectness: incorrect citing, multiple journal abbreviations ! Citing behavior: cite well-known authors, friends citing friends ! Multi-author papers: self-cites (introduce normalized citation counts?)• Tracing usage and popularity ! Reads (ADS) ! Downloads (arXiv, Citebase) ! Forum discussions (e.g., CosmoCoffee)FPCA-II, Cambridge, MA, April 2010
  27. 27. Citations vs. Reads
  28. 28. Citations vs. Reads
  29. 29. Citations vs. Reads
  30. 30. Downloads from
  31. 31. Discussions at
  32. 32. Discussions at
  33. 33. Ongoing projects• Further metadata from the ADS: ! Subject terms / keywords ! Full info re. citations (to eliminate self-cites) ! All available links (DOI, ePrintID etc.) ! Author gender (in collaboration with AuthorID projects?)• Additional internal links: ! Authors’ acknowledgments of observing time ! Fully link telbib records and ESO Press Releases ! Gather information on publication delay FPCA-II, Cambridge, MA, April 2010
  34. 34. Thank you