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Title	Neutral hydrogen in the Andromeda nebula- IV. Single-velocity contour maps.
Authors	Unwin, S. C.
Bibcode	1983MNRAS.205..787U Search ADS ↗
Abstract	Neutral hydrogen observations of the Andromeda Nebula (M31) are presented as a series of single-velocity maps with an angular resolution of 0.8×1.2 arcmin², a velocity resolution of 16 km s^-1 and rms noise 3.6K. These maps cover all the H I emission within 20 kpc of the nucleus. They are corrected for 21 cm continuum emission and primary-beam attenuation, to facilitate comparison with single-dish molecular-line observations with similar angular resolution.
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