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