Table 1: Properties of the sample of XEST variable sources analyzed in this paper. Stellar parameters are taken from Güdel et al. (2007a). In the last column we give a classification of the observed variability.
XEST ID Optical ID Sp. T. TTS class. $R_\star/R_\odot$ Variab. type
04-016 V830 Tau K7 WTTS 1.79 slow decay
09-026 HQ Tau AB ... WTTS ... slow decay
11-057 FS Tau AC M0+M3.5 CTTS+CTTS 0.93 slow decay
12-040 DN Tau M0 CTTS 2.25 slow modulation
15-040 DH Tau AB M1 CTTS 1.82 slow decay
17-066 JH 108 M1 WTTS 1.32 atypical flare
21-039 HD 283572 G5 WTTS 2.56 slow modulation
22-047 XZ Tau AB M2+M3.5 CTTS+CTTS 1.18 slow rise
22-089 L1551 51 K7 WTTS 1.39 slow decay
23-032/24-028 V410 Tau ABC K4 WTTS 2.31 atypical flare
23-047/24-040 V892 Tau B9 Herbig Ae 2.66 atypical flare
23-050/24-042 V410 X7 M0.75 WTTS 1.69 flares
23-056/24-047 Hubble 4 K7 WTTS 3.33 complex variab.
23-074/24-061 V819 Tau AB K7 WTTS 1.93 flare
26-072 HBC 427 K7 WTTS 1.85 flare
28-100 BP Tau K7 CTTS 1.97 flare
05-031 HD 283810 K5V     flare
16-031 2M J04195676+2714488 ...     flares
22-024 HD 285845 G6     complex variab.

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