Table 3: HARPS observations results for R TrA, S Cru and Y Sgr.

JD$_{\rm c}$		 phase Cy. Sp. $RV_{\rm g}$ $RV_{\rm m}$ $RV_{\rm c}$ $\it FWHM$ D A SNR $\chi_{\rm red}^{2}$
(a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) (l)
R TrA
202.53 0.09 14 1 -26.74 $\pm $ 0.07 -29.88 $\pm $ 0.17 -25.43 $\pm $ 1.16 0.467 $\pm $ 0.009 0.14 -30.3 $\pm $ 2.7 231 2.0
206.53 0.27 15 1 -17.70 $\pm $ 0.05 -19.71 $\pm $ 0.13 -16.92 $\pm $ 0.91 0.452 $\pm $ 0.005 0.17 -19.5 $\pm $ 1.5 224 1.6
152.65 0.37 1 2 -11.18 $\pm $ 0.03 -10.41 $\pm $ 0.08 -11.39 $\pm $ 0.56 0.449 $\pm $ 0.002 0.19 7.4 $\pm $ 0.8 241 1.6
203.55 0.39 14 1 -10.08 $\pm $ 0.04 -9.06 $\pm $ 0.11 -10.47 $\pm $ 0.71 0.447 $\pm $ 0.003 0.18 9.9 $\pm $ 1.1 257 1.1
156.65 0.55 2 2 -0.98 $\pm $ 0.04 2.20 $\pm $ 0.09 -2.15 $\pm $ 0.52 0.460 $\pm $ 0.005 0.19 30.4 $\pm $ 1.3 209 1.0
204.52 0.67 14 1 3.29 $\pm $ 0.06 6.70 $\pm $ 0.15 2.02 $\pm $ 0.74 0.492 $\pm $ 0.008 0.17 30.6 $\pm $ 2.0 207 1.4
150.65 0.78 1 2 2.26 $\pm $ 0.04 5.89 $\pm $ 0.09 0.89 $\pm $ 0.50 0.534 $\pm $ 0.005 0.16 29.9 $\pm $ 1.1 255 1.3
201.54 0.79 14 1 1.34 $\pm $ 0.06 4.64 $\pm $ 0.14 0.30 $\pm $ 0.74 0.524 $\pm $ 0.007 0.16 27.5 $\pm $ 1.6 247 1.7
154.65 0.96 2 2 -24.46 $\pm $ 0.05 -26.46 $\pm $ 0.13 -23.76 $\pm $ 0.79 0.481 $\pm $ 0.004 0.12 -18.3 $\pm $ 1.4 241 1.2
205.54 0.98 15 1 -25.60 $\pm $ 0.08 -28.18 $\pm $ 0.19 -24.71 $\pm $ 1.24 0.503 $\pm $ 0.007 0.12 -22.8 $\pm $ 2.1 243 1.4

S Cru

207.46		 0.03 3 1 -21.58 $\pm $ 0.05 -23.61 $\pm $ 0.13 -20.47 $\pm $ 1.01 0.386 $\pm $ 0.005 0.16 -23.6 $\pm $ 2.0 230 1.5
151.56 0.11 1 1 -19.32 $\pm $ 0.05 -21.43 $\pm $ 0.12 -18.20 $\pm $ 0.93 0.375 $\pm $ 0.005 0.18 -25.6 $\pm $ 2.0 214 1.4
203.49 0.18 3 2 -15.82 $\pm $ 0.03 -17.26 $\pm $ 0.07 -14.98 $\pm $ 0.50 0.344 $\pm $ 0.002 0.21 -19.0 $\pm $ 1.0 224 1.7
156.63 0.19 1 1 -15.65 $\pm $ 0.04 -16.90 $\pm $ 0.10 -15.07 $\pm $ 0.52 0.281 $\pm $ 0.004 0.19 -19.8 $\pm $ 1.9 221 2.4
152.63 0.34 1 1 -6.94 $\pm $ 0.02 -7.08 $\pm $ 0.06 -6.54 $\pm $ 0.46 0.306 $\pm $ 0.001 0.26 -2.1 $\pm $ 0.8 255 1.9
153.57 0.54 1 1 4.61 $\pm $ 0.03 5.87 $\pm $ 0.08 4.21 $\pm $ 0.62 0.351 $\pm $ 0.002 0.26 16.5 $\pm $ 1.1 209 2.5
205.47 0.60 3 1 7.09 $\pm $ 0.03 8.77 $\pm $ 0.06 6.44 $\pm $ 0.59 0.386 $\pm $ 0.002 0.26 19.9 $\pm $ 0.9 269 2.5
154.64 0.76 1 1 13.40 $\pm $ 0.05 15.66 $\pm $ 0.12 12.48 $\pm $ 1.06 0.454 $\pm $ 0.005 0.23 22.5 $\pm $ 1.4 181 1.6
206.48 0.82 3 1 12.07 $\pm $ 0.04 14.42 $\pm $ 0.09 11.17 $\pm $ 0.59 0.469 $\pm $ 0.004 0.20 22.4 $\pm $ 1.0 285 1.5
150.63 0.91 1 1 -9.32 $\pm $ 0.14 -10.19 $\pm $ 0.35 -8.58 $\pm $ 1.37 0.412 $\pm $ 0.008 0.17 -10.1 $\pm $ 3.7 87 1.4
202.49 0.97 3 1 -19.91 $\pm $ 0.05 -21.62 $\pm $ 0.12 -19.05 $\pm $ 0.70 0.401 $\pm $ 0.004 0.15 -19.2 $\pm $ 1.5 287 2.0

Y Sgr

204.63		 0.12 10 2 -16.53 $\pm $ 0.06 -20.47 $\pm $ 0.15 -15.07 $\pm $ 0.86 0.485 $\pm $ 0.011 0.15 -36.4 $\pm $ 3.0 160 1.1
152.80 0.14 1 2 -15.07 $\pm $ 0.04 -18.08 $\pm $ 0.09 -14.02 $\pm $ 0.56 0.488 $\pm $ 0.004 0.16 -27.2 $\pm $ 1.3 251 1.4
205.67 0.30 10 1 -6.93 $\pm $ 0.05 -8.45 $\pm $ 0.12 -6.56 $\pm $ 0.65 0.472 $\pm $ 0.003 0.19 -13.7 $\pm $ 1.1 244 2.6
149.80 0.62 1 2 9.37 $\pm $ 0.04 12.58 $\pm $ 0.09 8.13 $\pm $ 0.62 0.467 $\pm $ 0.005 0.21 30.5 $\pm $ 1.3 178 1.0
202.65 0.77 10 2 18.50 $\pm $ 0.04 23.46 $\pm $ 0.09 16.08 $\pm $ 0.71 0.565 $\pm $ 0.007 0.19 39.5 $\pm $ 1.4 231 1.5
150.79 0.79 1 2 18.31 $\pm $ 0.03 23.31 $\pm $ 0.08 15.98 $\pm $ 0.61 0.581 $\pm $ 0.006 0.18 38.5 $\pm $ 1.1 270 1.8
156.83 0.84 2 2 13.31 $\pm $ 0.04 18.07 $\pm $ 0.11 11.56 $\pm $ 0.63 0.626 $\pm $ 0.007 0.16 33.2 $\pm $ 1.2 255 1.6
203.65 0.95 10 2 -14.27 $\pm $ 0.04 -16.27 $\pm $ 0.11 -13.47 $\pm $ 0.50 0.530 $\pm $ 0.003 0.13 -16.5 $\pm $ 1.0 288 1.4
151.75 0.96 1 2 -15.22 $\pm $ 0.05 -17.50 $\pm $ 0.12 -14.51 $\pm $ 0.61 0.517 $\pm $ 0.004 0.13 -19.1 $\pm $ 1.2 254 1.1
(a) JD$_{\rm c}$, average Julian date of observation defined by $\rm JD_{\rm c}=JD-2~453~000$ [in days].
(b) phase, averaged pulsation phase of observation. For ephemeris see Table 1.
(c) Cy., pulsating cycle of the star corresponding to observation.
(d) Sp., number of spectra associated to observation. Results corresponding to these spectra are averaged.
(e) $RV_{\rm g}$, Gaussian fit radial velocity and the associated error barre [in km s-1].
(f) $RV_{\rm m}$, minimum radial velocity derived from the bi-Gaussian fit [in km s-1].
(g) $RV_{\rm c}$, radial velocity corresponding to the first moment of the spectral line [in km s-1].
(h) FWHM, Full-Width at Half-Maximum derived from the bi-Gaussian fit [in Angstroms].
(i) D, line depth derived from the bi-Gaussian fit [no dimension]. Errors bars are not indicated but of the order of 10-4.
(j) A, asymmetry derived from the bi-Gaussian fit [in percentage].
(k) SNR, observational spectral line signal to noise ratio.
(l) $\chi_{\rm red}^{2}$, reduced $\chi^{2}$factor corresponding to the bi-Gaussian fit.

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