...3,

In memoriam.

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... APPHOT/IRAF

IRAF is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation.

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... stars

The difference between the value of $\theta$ for the adopted q=0.42 geometry and for the alternative q=0.5 case (Wood & Crawford 1986) is negligible.

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... evidence

The observed difference in temperature is at the $1\sigma$ limit.

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