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Table 1

Observational parameters.

LAB H i  data
Angular resolution 34′
Velocity resolution 1.3 km   s-1
Velocity coverage –450 to 400 km   s-1
CGPS H i  data
Angular resolution
Velocity resolution 1.3 km   s-1
Velocity coverage –164 to 58 km   s-1
Radio continuum
Angular resolution (408 MHz)
Angular resolution (1420 MHz)
Angular resolution (2695 MHz) 43
CO data
Angular resolution  ~1′
Velocity resolution 0.824 km   s-1
Infrared data
Angular resolution (MSX) 184
Angular resolution (IRIS) 38–43
Angular resolution (HIRES) 05–2′

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