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Cohen, R.S., T.M. Dame, and P. Thaddeus, 1986: The Columbia CO survey of molecular clouds in the first galactic quadrant. Astrophys. J. Supp. Series, 60, 695-818, doi:10.1086/191101.
Using the Columbia millimeter-wave telescope, a 1.2 m Cassegrain with a beamwidth of 8', we have made a survey of 2.6 mm CO emission from the Galactic disk from l = 12° to l = 60° and |b| ≤ 1°. The survey comprises over 3000 spectra taken every 0.125°, approximately every beamwidth, for |b| ≤ 0.5° and every 0.25° elsewhere. The velocity resolution is 1.3 km/s, and the coverage is from -13 to 153 km/s at l < 55° and from -55 to 111 km/s for l ≥ 55°. The noise is 0.45 K rms per 1.3 km/s resolution element.
The calibration of the instrument has been compared with that of other telescopes. When the different beams are taken into account, it agrees well with measurements of individual molecular clouds (±17%) and the Galactic plane (±26%) done with both the Bell Laboratories 7 m and the NRAO 11 m telescopes. A measurement of the Sun with a standard gain horn differs from our measurement by only 6%.
This paper presents the entire collection of spectra as well as spatial and longitude-velocity maps.
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