M. A. Bramson, Infrared Radiation (Plenum, New York, 1968), Chap. 5, p. 164.

J. Dufay, Introduction to Astrophysics: The Stars (Dover, New York, 1964), pp. 89–90.

W. H. Press, B. P. Flannery, S. A. Teukolsky, W. T. Vetterling, Numerical Recipes in Pascal: The Art of Scientific Computing (Cambridge U. Press, Cambridge, England, 1989), Chap. 10, pp. 326–330.

J. Kletzek, Exercises in Astronomy (Reidel, Dordrecht, The Netherlands, 1987), pp. 194–196.

M. Pivovonsky, M. R. Nagel, Tables of Blackbody Radiation Functions (Macmillan, New York, 1961), Chap. 3, p. xiii.

M. Pivovonsky, M. R. Nagel, Tables of Blackbody Radiation Functions (Macmillan, New York, 1961), Chap. 3, p. xiii.

W. H. Press, B. P. Flannery, S. A. Teukolsky, W. T. Vetterling, Numerical Recipes in Pascal: The Art of Scientific Computing (Cambridge U. Press, Cambridge, England, 1989), Chap. 10, pp. 326–330.

W. H. Press, B. P. Flannery, S. A. Teukolsky, W. T. Vetterling, Numerical Recipes in Pascal: The Art of Scientific Computing (Cambridge U. Press, Cambridge, England, 1989), Chap. 10, pp. 326–330.

W. H. Press, B. P. Flannery, S. A. Teukolsky, W. T. Vetterling, Numerical Recipes in Pascal: The Art of Scientific Computing (Cambridge U. Press, Cambridge, England, 1989), Chap. 10, pp. 326–330.

M. Pivovonsky, M. R. Nagel, Tables of Blackbody Radiation Functions (Macmillan, New York, 1961), Chap. 3, p. xiii.

M. A. Bramson, Infrared Radiation (Plenum, New York, 1968), Chap. 5, p. 164.

W. H. Press, B. P. Flannery, S. A. Teukolsky, W. T. Vetterling, Numerical Recipes in Pascal: The Art of Scientific Computing (Cambridge U. Press, Cambridge, England, 1989), Chap. 10, pp. 326–330.

J. Kletzek, Exercises in Astronomy (Reidel, Dordrecht, The Netherlands, 1987), pp. 194–196.

J. Dufay, Introduction to Astrophysics: The Stars (Dover, New York, 1964), pp. 89–90.

The data for emissivity variations in Ref. 1, Fig. 4, are drawn from a mirror reflected around the vertical axis. Figure 2 in Ref. 1 is correct.