The CD -24°7599 Campaign of 1994 (DSN 11)
After the 1992 data of CD-24 7599 had been analysed it was clear, that more
pulsation modes than detected must be present. Therefore, the star was
re-observed by WET in May, 1994.
The number of detectable pulsation frequencies of CD-24~7599 has increased to 13.
The 3 dominant modes exhibit amplitude variations with a time scale of one month as well as frequency variations.
7 observatories could acquire data:
- 0.75 meter telescope at the South African Astronomical
Observatory, South Africa (observers D. A. H. Buckley and D. O'Donoghue)
- 0.6 meter telescope at Siding Spring Observatory, Australia (S.J.
Kleinman and K. Wu)
- 0.6 meter telescope at the Mount John University Observatory, New
Zealand (D. J. Sullivan)
- 2.1 meter telescope at McDonald Observatory, Texas
(T. K. Watson and M. S. O'Brien)
- 0.6 meter telescope at Mauna Kea Observatory, Hawaii (J. C. Clemens and
M. A. Wood)
- 1.6 meter telescope in Itajuba, Brasil (O. Giovannini)
- 1.0 meter telescope at Wise Observatory, Israel (E. Leibowitz)
Publications following this campaign :
- New WET observations of the Delta Scuti star CD-24° 7599: amplitude
variability and discovery of 13 pulsation modes (G. Handler et al.), 1995,
in "Astrophysical Applications of Stellar Pulsation", eds. R. S. Stobie and
P.A. Whitelock, Proc. IAU Coll. 155, p. 331)
- New Whole Earth Telescope observations of CD-24 7599: steps towards Delta Scuti star seismology
(G. Handler et al.), 1997, MNRAS 286, 303
- On the frequency and amplitude variations of the Delta Scuti star CD-24° 7599 (G. Handler et al.), submitted to MNRAS