An upper limit on the EUV flux from HD192273

Details An upper limit on the EUV flux from HD192273 An upper limit on the EUV flux from HD192273

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.285..210b&link_type=abstract

Nature, vol. 285, May 22, 1980, p. 210, 211.

Astronomy and Astrophysics

Astronomy

1

B Stars, Far Ultraviolet Radiation, Radiant Flux Density, Stellar Spectrophotometry, Ultraviolet Astronomy, Satellite Observation, Stellar Spectra, Visual Photometry

Scientific paper

Observations placing an upper limit on the EUV flux from the proposed EUV source HD 192273 are reported. The region of the sky corresponding to the position of the star was observed by the Voyager 1 UV spectrometer to have a strong signal in the 912-1707 A range, however no statistically significant signal was detected in the range 534-776 A. A two-standard-deviation upper limit to the stellar flux in this region of 0.008 photons/sq cm per sec per A, corresponding to 10% of the 500-780 A flux reported by Cash et al. (1978) for the EUV source in the constellation Pavo, is thus placed on the flux from HD 192273 and it is concluded that the star is probably not the source detected by Cash et al. The observed flux of the object at 1565 A is also observed to be consistent with its effective temperature and gravity.

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