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In the published article Equation (23) has two typos, one in the normalization constant and one in an exponent. The corrected version of the equation should read
The error is reflected in the positions of the lines of constant mass-loss rate in Figure 5. The corrected version of the figure is shown below.
Figure 5. The peak luminosity of AT2018cow on two different epochs, compared to classes of energetic transients (see Chevalier 1998; Soderberg et al. 2010). The value at Δt = 22 days comes from our work. The value at Δt = 91 days comes from Margutti et al. (2019) and shows that the velocity has not slowed significantly. For other sources, we choose values of peak frequency and peak luminosity as described in Appendix C of Ho et al. (2019). AT2018cow is unusual in having a large radio luminosity as well as a high νa , and we discuss the physical interpretation of both of these characteristics in the text. Lines of constant mass-loss rate (scaled to wind velocity) are shown in units of 10−4 M⊙ yr−1/1000 km s−1. Note that the dotted lines assume that the radio peak is due to synchrotron self-absorption rather than free–free absorption (FFA), but that FFA has been the preferred fit in some cases, such as for SN 1979C and SN 1980K (Chevalier 1984).
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The errors did not propagate into other equations or calculations made in the text.
A.Y.Q.H. would like to thank Lindsay DeMarchi, Raffaella Margutti, and Yuhan Yao for pointing out the errors listed above.