... imaging

Appendices are only available in electronic form at http://www.aanda.org

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... FCRAO

Five College Radio Astronomy Observatory.

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... MSX

Midcourse Space Experiment, Egan et al. (1998).

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... McLaughlin

Willmclaughlin.astrodigitals.com

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... 2MASS

The Two Micron All Sky Survey (2MASS) is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation.

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... catalog

Version 2.3 of the Midcourse Space Experiment (MSX).

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... CGPS

Canadian Galactic Plane Survey.

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