The Last Measurements Made with the Wampler Scanner. IV. Semicontinuous Scans of G and K Stars

Details The Last Measurements Made with the Wampler Scanner. IV. Semicontinuous Scans of G and K Stars The Last Measurements Made with the Wampler Scanner. IV. Semicontinuous Scans of G and K Stars

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pasp..121..827t&link_type=abstract

Publications of the Astronomical Society of the Pacific, Volume 121, issue 882, pp.827-841

Astronomy and Astrophysics

Astronomy

Stars

Scientific paper

New semicontinuous scans (with nearly contiguous passbands) are presented for α CMi and for 24 G and K giants. In addition, 12 such scans published in 1984 are reduced to an up-to-date standard-star system and adopted. The collected scans range from 3288 Å to at least 6940 Å, and they have been standardized to a system defined by α Lyr. They are supplemented by measurements of 23 of the program giants using six near-infrared passbands. Tests of the consistency and accuracy of the data yield encouraging results. The scans are used to test B and V response curves published by Bessell, and it is found that if those curves are weighted by wavelength (as Bessell proposes), they yield an acceptable wavelength baseline for B-V. The scans are also compared to a solar irradiance curve published by Lockwood et al. and standardized by measuring α Lyr. At wavelengths greater than 5248 Å, the Lockwood et al. curve appears to be "too blue," and a correction equation is proposed. However, that curve yields a satisfactory synthetic value of B-V and good agreement with a comparable stellar scan at wavelengths ranging from 4100 Å to 5207 Å.

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