The Green Bank Telescope: current status and early results - Science

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rprestag@,nrao.edu', phone 1 304-456-2222; fax 1 304-456-2170; .... Figure 3. The aperture efficiency of the GET at 2OGHZ with the active surface off (blue ... GBT observations of the Galactic HT halo in the inner galaxy by Lockman et al.