Table 1: Scale calibration of the U plate for the SMC.
Spectral type $U_{\rm SMC}$ Age

O5 11.9 $3\times10^6$

B0 13.5 $4\times10^6$

B1 14.6 $6\times10^6$

B2 15.4 $1\times10^7$

B3 16.3 $1.5\times10^7$

B4 16.7 $2.8\times10^7$

B5 17.2 $4\times10^7$

B6 17.5 $1\times10^8$

B7 17.9 $1.6\times10^8$

B8 18.4 $2\times10^8$

B9 18.5 $3\times10^8$

A0 19.7 $4\times10^8$

**Table 1:** Scale calibration of the U plate for the SMC.
Spectral type	$U_{\rm SMC}$	Age
O5	11.9	$3\times10^6$
B0	13.5	$4\times10^6$
B1	14.6	$6\times10^6$
B2	15.4	$1\times10^7$
B3	16.3	$1.5\times10^7$
B4	16.7	$2.8\times10^7$
B5	17.2	$4\times10^7$
B6	17.5	$1\times10^8$
B7	17.9	$1.6\times10^8$
B8	18.4	$2\times10^8$
B9	18.5	$3\times10^8$
A0	19.7	$4\times10^8$

Source LaTeX | All tables | In the text