Table 1: The sources and numbers of light curves NLC used to define the classes, their average total time span $\langle T_{\rm tot}\rangle$ and their average number of measurements $\langle N_{\rm points}\rangle$ .
Instrument NLC $\langle T_{\rm tot}\rangle$ (days) $\langle N_{\rm points}\rangle$

HIPPARCOS 1044 1097 103

GENEVA 118 3809 175

OGLE 527 1067 329

ULTRACAM 19 22 15 820

MOST 3 34 59 170

WET 3 5.6 11 643

ROTOR 3 5066 881

CFHT 3 0.18 1520

ESO-LTPV 20 2198 209

**Table 1:** The sources and numbers of light curves *NLC* used to define the classes, their average total time span $\langle T_{\rm tot}\rangle$ and their average number of measurements $\langle N_{\rm points}\rangle$ .
Instrument	NLC	$\langle T_{\rm tot}\rangle$ (days)	$\langle N_{\rm points}\rangle$
HIPPARCOS	1044	1097	103
GENEVA	118	3809	175
OGLE	527	1067	329
ULTRACAM	19	22	15 820
MOST	3	34	59 170
WET	3	5.6	11 643
ROTOR	3	5066	881
CFHT	3	0.18	1520
ESO-LTPV	20	2198	209

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