Extending the WET technique to lower frequencies

Details Extending the WET technique to lower frequencies Extending the WET technique to lower frequencies

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993balta...2..468b&link_type=abstract

Baltic Astronomy, vol. 2, p. 468

Astronomy and Astrophysics

Astronomy

15

Low Frequencies, Reflecting Telescopes, Stellar Spectrophotometry, Data Reduction, Nyquist Frequencies

Scientific paper

The results of the WET (Whole Earth Telescope) and three-star techniques are compared for the detection of frequencies less than 1200 microHz (15 minute periods or longer) on the basis of actual observational data. This comparison was made possible by a combined WET/DSN (Delta Scuti Network) observing campaign during March and April 1993. The WET technique with continuous coverage shows a similar noise level down to a frequency of 300 microHz and becomes unreliable at 150 microHz, where the use of the three-star technique becomes essential. A hybrid technique for observing the comparison stars once every hour considerably lowers the noise level relative to the WET technique, but causes some photometric errors and spurious periods.

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