Table 5
Epochs, periods, mean magnitudes and amplitudes A in V and I for all confirmed variable stars in M 30.
# | Epoch | P | P (Rosino | P (Pietrukowicz | ⟨ V ⟩ | ⟨ I ⟩ | A V | A I | Type | |
(HJD-2 450 000) | (d) | 1949) (d) | et al. 2004) (d) | (mag) | (mag) | (mag) | (mag) | |||
|
||||||||||
V1 | 6160.8234 | 0.7436296 | 0.74365a | 0.751 | 15.12 | 14.52 | 0.93 | 0.74 | RR0 | |
V2 | 6150.8616 | 0.6535119 | 0.6535049 | − | 15.20 | 14.62 | 0.92 | 0.65 | RR0 | |
V3 | 6147.8307 | 0.6963265 | 0.69632 | − | 15.12 | 14.54 | 0.94 | 0.67 | RR0 | |
V4b | 6147.8569 | 0.092318 | − | − | 20.19 | 19.14 | 2.74 | 1.91 | U Gem | |
V14 | 6150.8758 | 0.347953 | − | − | 15.18 | 14.77 | 0.48 | 0.32 | RR1 | |
V15 | 6160.7960 | 0.679015 | − | 0.689 | 15.07 | 14.52 | 1.08 | 0.68 | RR0 | |
V16 | 6190.7559 | 0.325366 | − | − | 15.22 | 14.81 | 0.33 | 0.27 | RR1 | |
V17 | 6150.8805 | 0.059954 | − | − | 14.14 | 13.08 | 0.07 | 0.04 | SX Phoenicis + blend? | |
V18 | 6161.8536 | 0.307099 | − | − | 17.43 | 17.19 | 0.41 | 0.49 | Eclipsing blue straggler | |
V19c | 5779.8451 | 0.343379 | − | 0.341 | 13.85 | 13.10 | 0.15 | 0.11 | RR1 | |
V20 | 6147.8377 | 0.040199 | − | − | 17.79 | 17.57 | 0.15 | 0.13 | SX Phoenicis | |
V21 | 6147.8589 | 0.113151 | − | − | 17.87 | 17.11 | ~0.2 | − | ? |
Notes.For RR Lyrae stars, ⟨ V ⟩ and ⟨ I ⟩ are intensity-weighted mean magnitudes, while for the other variables, they are inverse-variance-weighted mean magnitudes.
Rosino (1961) revised the period of V1 to 0.743608 d.
The period given for V4 is that of the sinusoidal variations seen during the quiescent part of the light curve, and the mean magnitudes are also those during quiescent phase; outburst mean magnitudes are given in the text (see Sect. 3.4).
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