Planck frequencies as Schelling points in SETI – Erratum

The Publisher apologises that due to a typesetting error all instances of μ were rendered as m in Tables 2 and 5, making the units of some entries incorrect by a factor of 10³.

Additionally, there are missing minus signs in equations (5) and (7) in Tables 2 and 5, as well as in the table notes of Tables 3 and 4. The correct equations are:

(5)$$n_{\hbar , e} = - {\rm ln\;}( {E / E _{P} {\rm }} ) $$

(7)$$n_{h, e} = -\ln \;\left({E/\sqrt {hc^5\;/G } } \right)$$

The correct tables are as below

Table 2. The Planck frequency comb with ${\hbar} \rightarrow h$

$n_{h, \alpha } =\log {( E/\sqrt {hc^5/G}) }/ \! \log {( e^2/( ch) ) }$.

This set contains no convenient lines in the optical or near-infrared.

Table 3. The Planck frequency comb with $\hbar \rightarrow h$ and base e

$n_{h, e} =-\ln {( E/\sqrt {hc^5/G}) }$.

Table 4. The Planck frequency comb with base e

$n_{\hbar, e} =- \ln {( E/E_{\rm P}) }$.

Table 5. The Rydberg frequency comb $n_{R} = \log _\alpha {( E/( m_{\rm e}c^2/2) ) }$.