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Astron. Astrophys. 351, 1087-1102 (1999)

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We are grateful to E. Brinks who provided the H I data cube, to B. Milliard and E. Koper who provided the UV image of M 31, and to G. Helou who kindly made the high-resolution IRAS maps of M 31 available to us. We are very grateful to Hans-Hermann Heyer who digitized his beautiful unsharp masked optical image of M 31 and made the corresponding file available to us. We thank S. Xie, E. Koper and M. Brewer for their help with the observations, the FCRAO program committee for their award of observing time, and J. Young for continuing support. Useful discussions with M. Guélin are gratefully acknowledged. We are indebted to the referee E. Brinks for many useful comments. L.L. thanks the CfA for travel support and the Director of the Space Telescope Science Institute for supporting this research through an allocation from his Discretionary Research Fund. The Space Telescope Science Institute is operated by AURA for NASA under contract NAS 5-26555.

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© European Southern Observatory (ESO) 1999

Online publication: November 16, 1999