Optical observations of WRA 977

Details Optical observations of WRA 977 Optical observations of WRA 977

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203..689b&link_type=abstract

Astrophysical Journal, vol. 203, Feb. 1, 1976, pt. 1, p. 689-693.

Astronomy and Astrophysics

Astrophysics

16

Light Curve, Stellar Spectrophotometry, Ubv Spectra, Variable Stars, X Ray Sources, Astronomical Photometry, Least Squares Method, Optical Emission Spectroscopy, Periodic Variations, Stellar Luminosity, X Ray Stars

Scientific paper

Results are reported for UBV photometric observations of the variable star WRA 977 which were conducted over a period of seven months. Correlogram and periodogram analyses of the light curve are carried out to determine whether the observed variations are periodic and what the frequency of such variations may be. The observations and analyses indicate activity on the 0.1-magnitude level on a time scale of days, no activity greater than about 0.01 magnitude on a time scale of minutes, and no persistent periodic variations of significant amplitude. It is suggested that WRA 977 may be a quasi-periodic variable and may very well be associated with the X-ray source 3U 1223-62.

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