References

• Anthony-Twarog B.J., Twarog B.A., 1994, AJ 107, 1577 NASA ADS
• Berghöfer T.W., Bowyer S., Lieu R., Knude J., 1997, ApJ (submitted)
• Bowyer S., Malina R.F., 1991, in Extreme Ultraviolet Astronomy, Malina R.F. and Bowyer S. (eds.). New York: Pergamon, p. 397
• Bowyer S., Lieu R., Sidher S.D., Lampton M., Knude J., 1995, Nat 375, 212 NASA ADS
• Crawford D.L., Mander J., 1966, AJ 71, 114 NASA ADS
• Crawford D.L., Barnes J.V., 1970, AJ 75, 978 NASA ADS
• Crawford D.L., 1975, AJ 80, 955 NASA ADS
• Crawford D.L., 1978, AJ 83, 48 NASA ADS
• Crawford D.L., 1979, AJ 84, 1858 NASA ADS
• ESA, 1997, The Hipparcos Catalogue, ESA SP-1200
• Grønbech B., Olsen E.H., Strömgren B., 1976, A&AS 26, 155 NASA ADS
• Hauck B., Mermilliod M., 1990, A&AS 86, 107 NASA ADS
• Hilditch R.W., Hill G., Barnes J.V., 1983, MNRAS 204, 241 NASA ADS
• Hill G., Hilditch R.W., Barnes J.V., 1982, PDAO 16, 111 NASA ADS
• Knude J., 1978, A&AS 30, 347
• Knude J., 1981, A&A 98, 74 NASA ADS
• Lasker B.M., Sturch C.R., McLean B.J., et al., 1990, AJ 99, 2019 NASA ADS
• Olsen E.H., 1983, A&AS 54, 55 NASA ADS
• Olsen E.H., 1984, A&AS 57, 443 NASA ADS
• Olsen E.H., 1993, A&AS 102, 89 NASA ADS
• Röser S., Bastian U., 1993, BCDA 42, 11