Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994iraj...21..263a&link_type=abstract
Irish Astronomical Journal (ISSN 0021-1052), vol. 21, no. 3-4, p. 263-267
Astronomy and Astrophysics
Astronomy
1
Astronomical Photometry, Brightness, Error Signals, Extremely High Frequencies, Infrared Astronomy, Infrared Spectra, Late Stars, Stellar Oscillations, Data Processing, Data Reduction, Fast Fourier Transformations, Infrared Telescopes, Light Curve, Photometers, Power Spectra, Temporal Resolution
Scientific paper
In monitoring the brightness of stars for the detection of quasi-periodic oscillations all spurious instrumental sources must obviously be first removed. A recent monitoring run on several stars was carried out in November 1993 at 10 and 30 ms time resolution in the K-band using the European Southern Observatory (ESO) 1 meter IR telescope. The purpose was to examine sequential samples of the data from single nights for sub-second stellar signals using the fast Fourier transform. Results clearly showed that the ESO fast photometer system possessed at least three spurious signals beyond 6 Hz. There was no evidence for intrinsic stellar signals from 0.016 Hz down to the Nyguist limit at 16.7 Hz in four stars examined.
Andrews David A.
Panagi Peter M.
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