Table 3
Epochs, periods, mean magnitudes, and amplitudes A in V and I for all confirmed variable stars in M 68.
| # | Epoch | P | β | ⟨V ⟩ | ⟨I ⟩ | A V | A I | Type | ||
| (HJD-2 450 000) | (d) | [dMyr-1] | [mag] | [mag] | [mag] | [mag] | ||||
| RR0 | ||||||||||
|
|
||||||||||
| V2 | 6411.5879 | 0.5781755 | −0.125 | 15.75 | 15.17 | 0.72 | 0.49 | RR0 | ||
| V9 | 6412.5455 | 0.579043 | − | 15.72 | 15.12 | 0.69 | 0.40 | RR0b | ||
| V10 | 6363.7134 | 0.551920 | − | 15.71 | − | 1.08 | − | RR0b | ||
| V12 | 6369.4311 | 0.615546 | − | 15.56 | 15.04 | 0.89 | 0.61 | RR0 | ||
| V14 | 6373.4455 | 0.5568499 | +1.553 | 15.73 | 15.20 | 1.11 | 0.77 | RR0 | ||
| V17 | 6411.5835 | 0.668424 | − | 15.68 | 15.08 | 0.82 | 0.54 | RR0(b?) | ||
| V22 | 6373.4162 | 0.5634451 | − | 15.67 | 15.13 | 1.15 | 0.75 | RR0 | ||
| V23 | 6410.5710 | 0.6588921 | − | 15.68 | 15.11 | 1.11 | 0.58 | RR0 | ||
| V25 | 6411.5323 | 0.6414842 | −0.488 | 15.72 | 15.08 | 0.79 | 0.45 | RR0b | ||
| V28 | 6363.7134 | 0.6067796 | + 0.102 | 15.75 | 15.14 | 1.18 | 0.70 | RR0 | ||
| V30 | 6370.5680 | 0.7336375 | + 0.044 | 15.64 | 15.00 | 0.37 | 0.25 | RR0 | ||
| V32 | − | 0.5882 | − | − | − | − | − | RR0 | ||
| V35 | 6381.6690 | 0.7025348 | − | 15.56 | 15.00 | 1.05 | 0.66 | RR0 | ||
| V46 | 6363.7743 | 0.7382510 | − | 15.64 | 15.01 | 0.54 | 0.37 | RR0 | ||
|
|
||||||||||
| RR1 | ||||||||||
|
|
||||||||||
| V1 | 6381.7111 | 0.3495912 | +0.273 | 15.70 | 15.23 | ~0.45 | 0.40 | RR1 | ||
| V5 | 6366.6697 | 0.2821009 | −0.497 | 15.72 | 15.36 | 0.45 | 0.28 | RR1b | ||
| V6 | 6385.6186 | 0.3684935 | −0.088 | 15.69 | 15.20 | 0.53 | 0.34 | RR1 | ||
| V11 | 6370.6253 | 0.3649338 | + 0.225 | 15.71 | 15.24 | ~0.55 | 0.37 | RR1 | ||
| V13 | 6411.5829 | 0.3617370 | + 0.116 | 15.74 | 15.26 | 0.58 | 0.36 | RR1 | ||
| V15 | 6385.6092 | 0.3722615 | − | 15.68 | 15.20 | 0.53 | 0.34 | RR1 | ||
| V16 | 6381.6814 | 0.3819671 | +0.066 | 15.69 | 15.22 | 0.50 | 0.35 | RR1 | ||
| V18 | 6363.7943 | 0.3673459 | −0.051 | 15.72 | 15.24 | 0.55 | 0.37 | RR1 | ||
| V20 | 6363.7643 | 0.3857892 | +0.234 | 15.68 | 15.20 | 0.56 | 0.34 | RR1 | ||
| V24 | 6370.4698 | 0.3764448 | −1.081 | 15.68 | 15.20 | 0.50 | 0.34 | RR1 | ||
| V33 | 6385.5693 | 0.3905647 | − | 15.67 | 15.17 | 0.47 | 0.23 | RR1 | ||
| V37 | 6363.7727 | 0.3846092 | − | 15.64 | 15.17 | 0.47 | 0.33 | RR1 | ||
| V38 | 6370.4420 | 0.3828116 | − | 15.63 | 15.17 | 0.53 | 0.33 | RR1 | ||
| V43 | 6363.7527 | 0.3706144 | − | 15.71 | 15.24 | 0.57 | 0.35 | RR1 | ||
| V44 | 6371.4311 | 0.3850912 | − | 15.67 | 15.16 | 0.48 | 0.29 | RR1 | ||
| V47 | 6385.6436 | 0.3729255 | − | 15.63 | 15.13 | 0.49 | 0.32 | RR1 | ||
|
|
||||||||||
| RR01 | ||||||||||
|
|
||||||||||
| V3 | 6381.6890 | 0.3907346 | − | 15.64 | 15.20 | 0.68 | 0.42 | RR01 | ||
| V4 | 6410.6485 | 0.3962175 | − | 15.67 | 15.20 | 0.61 | 0.40 | RR01 | ||
| V7 | 6381.7511 | 0.3879608 | − | 15.71 | 15.22 | 0.62 | 0.41 | RR01 | ||
| V8 | 6412.5861 | 0.3904076 | − | 15.65 | 15.18 | 0.53 | 0.34 | RR01 | ||
| V19 | 6368.6564 | 0.3916309 | − | 15.66 | 15.18 | 0.56 | 0.34 | RR01 | ||
| V21 | 6385.6233 | 0.4071121 | − | 15.62 | 15.15 | 0.64 | 0.42 | RR01 | ||
| V26 | 6369.4571 | 0.4070332 | − | 15.72 | 15.18 | 0.80 | 0.50 | RR01 | ||
| V29 | 6387.5498 | 0.3952413 | − | 15.71 | 15.14 | 0.56 | 0.30 | RR01 | ||
| V31 | 6385.6217 | 0.3996599 | − | 15.58 | 15.15 | 0.66 | 0.43 | RR01 | ||
| V34 | 6363.7673 | 0.4001371 | − | 15.76 | 15.17 | ~0.60 | 0.45 | RR01 | ||
| V36 | 6384.6470 | 0.415346 | − | 15.68 | 15.16 | 0.64 | 0.40 | RR01 | ||
| V45 | 6366.6760 | 0.3908187 | − | 15.72 | 15.17 | 0.52 | 0.30 | RR01 | ||
|
|
||||||||||
| SX Phe | ||||||||||
|
|
||||||||||
| V39 | 6433.2863 | 0.0640464 | − | 18.04 | 17.66 | 0.85 | 0.64 | SX | ||
| V48 | 6387.6218 | 0.043225 | − | 17.29 | 16.93 | 0.24 | ~0.11 | SX | ||
| V49 | 6387.6120 | 0.048469 | − | 18.09 | 17.68 | 0.59 | 0.40 | SX | ||
| V50 | 6370.4561 | 0.065820 | − | 17.56 | 17.13 | 0.70 | 0.30 | SXd | ||
| V51 | 6383.6232 | 0.058925 | − | 17.24 | 16.73 | 0.35 | 0.20 | SX | ||
| V52 | 6410.5871 | 0.037056 | − | 17.90 | 17.51 | 0.25 | ~0.20 | SX | ||
|
|
||||||||||
| Others | ||||||||||
|
|
||||||||||
| V27 | 2697.3 | 322.2342 | − | 9.8 | − | 4.03 | − | Field Mira | ||
| V53 | − | − | − | 16.98 | 15.26 | ≥0.1 | − | ? | ||
Notes. V49, V50, V51, and V52 are newly discovered variables. A b at the end of the variable type denotes stars which exhibit Blazhko modulation in their light curve. “SX” denotes SX Phe stars, and an appended “d” denotes double-mode pulsation. ⟨V ⟩ and ⟨I ⟩ are intensity-weighted mean magnitudes. They are calculated from Fourier fits for all RRL stars, as the mean magnitude is stable even for unsatisfactory fits. For stars without good Fourier fits, amplitudes are calculated from the data. For V27, the data are taken from the ASAS catalogue (Pojmanski 2002). The data for V32 are taken from C93, because that star is outside of our FOV. Values of the period-change rate parameter β are also given, where relevant (see Sect. 3.2); in those cases, the value of P given corresponds to the instantaneous period at the epoch. This star is FI Hydra.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.