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\f0\fs24 \cf0 Measuring an observatory's research output is an integral part of its science operations. Like many other observatories, ESO tracks scholarly papers that use observational data from ESO facilities and uses state-of-the art tools to create, maintain, and further develop the Telescope Bibliography database\'a0(telbib,\'a0http://telbib.eso.org). While telbib started out as a stand-alone tool mostly used to compile lists of papers, it has by now developed into a multi-faceted, interlinked system.\'a0\
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The core of the telbib database are links between scientific papers and observational data generated by the La Silla Paranal Observatory residing in the ESO archive. This functionality will also be deployed for ALMA data as soon as a fully functional ALMA archive becomes available.\'a0\
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In addition, telbib reaches out to several other systems:\
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- papers featured in ESO press releases are linked to the ESO outreach department\
- bibliographic information and other metadata are imported from ADS\
- annotated telbib records are fed back into the ADS for easy access to observations through the Data links\
- using stabilobj (by Sebastien Derriere, CDS), astronomical objects in telbib entries are linked to CDS databases like SIMBAD and VizieR\
- alternative quality measurement tools are explored by enhancing telbib records with Altmetric impact scores\
- an API is provided for automated queries of the telbib database\
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The talk will illustrate these features to show how interconnected systems enhance the content and user experience of the telbib database.\'a0\
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