Session 50 - Interstellar Medium I.
Display session, Thursday, January 08
Exhibit Hall,

## [50.04] The Low-Resolution DRAO Survey of \ionH1 Emission from the Galactic Plane

L. A. Higgs, K. F. Tapping (NRC/HIA/DRAO)

The survey of \ionH1 emission from the Galactic plane which is currently underway using the Synthesis Telescope at the Dominion Radio Astrophysical Observatory (DRAO), as a major part of the Canadian Galactic Plane Survey, requires single-dish observations of \ionH1 emission to provide structural information that is missing from the interferometric observations (the so-called ``short spacing'' data). A fast \ionH1 line survey of about 1000 square degrees of the Galactic plane, which will be used for this purpose, is now being carried out using the DRAO 26-m Telescope. This survey of \ionH1 line emission will be fully sampled spatially, yielding nearly 25,000 spectra covering the velocity range of -260 km/s to 160 km/s. The survey covers the Galactic longitude range of 72.2\arcdeg to 149\arcdeg, between Galactic latitudes of -5.4\arcdeg and 7.2\arcdeg. The spectra have 512 channels with a resolution of 1.3 km/s. The survey will be completed in 1997 and the data will then be corrected for the effects of sidelobe contamination. Initial results of the survey will be presented.