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The HST Key Project Archives - M81

There are two M81 papers published by the Key Project.Note that M81 was observed with the WFC in 1991, 1992, and 1993.

• The Hubble Space Telescope Extragalactic Distance Scale Key Project I.The Discovery of Cepheids and a New Distance to M81,Freedman W.L., et al., 1994, ApJ, 427, 628
  
  • V-band Photometry
  • I-band Photometry
  • Cepheid Parameters

• The Hubble Space Telescope Extragalactic Distance Scale Key Project II.Photometry of WFC Images of M81,Hughes, S. M. G., et al., 1994, ApJ, 428, 143
  
  • M81 Major Axis Median WF F555W Image Chip1
  • M81 Major Axis Median WF F555W Image Chip2
  • M81 Major Axis Median WF F555W Image Chip3
  • M81 Major Axis Median WF F555W Image Chip4

  • M81 V30 Field Median WF F555W Image Chip1
  • M81 V30 Field Median WF F555W Image Chip2
  • M81 V30 Field Median WF F555W Image Chip3
  • M81 V30 Field Median WF F555W Image Chip4