Peremennye Zvezdy (Variable Stars) 40, No. 5, 2020 Received 14 September; accepted 25 September. DOI 10.24411/2221-0474-2020-10006
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We present 3296 magnitude measurements in the , , and filters acquired for the RR Lyrae star T Men. |
The high luminosity and large age of RR Lyrae variables make them ideal distance indicators and tracers for studies of the structure and kinematics of old Galactic subsystems, the halo and the thick disk. However, by 2011, the number of RR Lyrae variables with precise photometry in the extended solar neighborhood was rather limited - a total of about 300 stars (Dambis, 2009). This is why we started a program aimed at obtaining photometric observations for the greatest possible number of RR Lyraes. We published the first results of our photometric observations in our previous paper (Berdnikov et al., 2012), where we suspected the presence of Blazhko effect (Blazhko, 1907) in several stars, including T Men.
We continued to observe T Men, and here we present the results of our photometry.
We performed CCD observations of T Men during three observing runs (in the JD 2455896 - 56676 range) with the 76-cm telescope of the South African Astronomical Observatory (SAAO) using a SBIG CCD ST-10XME camera equipped with -band filters of the Kron-Cousins photometric system (Cousins, 1976). A description of the observing data reduction technique can be found in our previous paper (Berdnikov, 2012). We acquired a total of 2722 CCD frames with photometric errors close to 0.01 mag.
We also used the Las Cumbres Observatory Global Telescope (LCOGT) Network (Brown, 2013) to acquire 574 CCD frames during the time interval JD 2456635 - 56687. We reduce LCOGT observations by performing differential photometry relative to secondary standards whose magnitudes we determined based on observations made in SAAO; the photometric errors of these observations are close to 0.02 mag.
All observations are available in a text file in the html version of the paper.
The light curves are shown in Fig. 1, where the enhanced scatter of points supports the presence of Blazhko effect. We plan to use our data to search for the Blazhko effect period of T Men.
On the base of our observations we constructed the -, - and -band template curves which are presented in Table 1 and Fig. 2; together with them we present the -band template curve, based on observations from the ASAS-SN catalog (Jayasinghe et al., 2019). Table 1 lists the -, -, - and -band magnitudes of T Men at phases from 0 to 0.995 with a step of 0.005.
We plan to use these templates to study the behavior of pulsating period of T Men.
Acknowledgments: This work was supported by the Russian
Foundation for Basic Research (project nos. 18-02-00890 and
19-02-00611).
References:
Berdnikov, L.N., Kniazev, A.Yu., Sefako, R., et al., 2011, Astron. Rep., 55, 816
Blazhko, S., 1907, Astron. Nachr., 175, 325
Brown, T.M., Baliber, N., Bianco, F.B., et al., 2013 Publ. Astron. Soc. Pacif., 125, 1031
Cousins, A.W.J., 1976, Mem. RAS, 81, 25
Jayasinghe T., Stanek K.Z., Kochanek C.S., et al.), 2019, Mon. Not. Roy. Astron. Soc., 485, 961
Fig. 1. phased light curves of the RR Lyrae type star T Men. The enhanced scatter is due to the Blazhko effect. |
Table 1. -, -, - and -band template curves of T Men
Phase | Phase | ||||||||
0.000 | 13.255 | 13.096 | 13.074 | 12.824 | 0.500 | 14.280 | 14.016 | 13.856 | 13.262 |
0.005 | 13.256 | 13.097 | 13.075 | 12.824 | 0.505 | 14.283 | 14.018 | 13.859 | 13.263 |
0.010 | 13.260 | 13.100 | 13.078 | 12.826 | 0.510 | 14.285 | 14.019 | 13.863 | 13.264 |
0.015 | 13.266 | 13.104 | 13.082 | 12.829 | 0.515 | 14.287 | 14.020 | 13.865 | 13.265 |
0.020 | 13.273 | 13.110 | 13.088 | 12.833 | 0.520 | 14.289 | 14.021 | 13.868 | 13.266 |
0.025 | 13.283 | 13.117 | 13.096 | 12.838 | 0.525 | 14.292 | 14.022 | 13.870 | 13.267 |
0.030 | 13.293 | 13.125 | 13.104 | 12.843 | 0.530 | 14.294 | 14.023 | 13.871 | 13.268 |
0.035 | 13.305 | 13.134 | 13.113 | 12.849 | 0.535 | 14.296 | 14.024 | 13.871 | 13.269 |
0.040 | 13.317 | 13.144 | 13.123 | 12.856 | 0.540 | 14.298 | 14.024 | 13.871 | 13.271 |
0.045 | 13.330 | 13.154 | 13.133 | 12.863 | 0.545 | 14.299 | 14.024 | 13.870 | 13.272 |
0.050 | 13.344 | 13.165 | 13.143 | 12.870 | 0.550 | 14.299 | 14.024 | 13.868 | 13.274 |
0.055 | 13.358 | 13.177 | 13.153 | 12.876 | 0.555 | 14.299 | 14.024 | 13.867 | 13.275 |
0.060 | 13.372 | 13.189 | 13.164 | 12.882 | 0.560 | 14.297 | 14.023 | 13.865 | 13.277 |
0.065 | 13.386 | 13.201 | 13.175 | 12.889 | 0.565 | 14.295 | 14.023 | 13.863 | 13.278 |
0.070 | 13.400 | 13.214 | 13.185 | 12.894 | 0.570 | 14.292 | 14.023 | 13.861 | 13.279 |
0.075 | 13.414 | 13.227 | 13.195 | 12.900 | 0.575 | 14.290 | 14.022 | 13.859 | 13.279 |
0.080 | 13.428 | 13.240 | 13.205 | 12.905 | 0.580 | 14.287 | 14.022 | 13.858 | 13.280 |
0.085 | 13.442 | 13.253 | 13.215 | 12.910 | 0.585 | 14.284 | 14.021 | 13.858 | 13.280 |
0.090 | 13.456 | 13.267 | 13.226 | 12.915 | 0.590 | 14.283 | 14.021 | 13.858 | 13.279 |
0.095 | 13.469 | 13.281 | 13.236 | 12.920 | 0.595 | 14.281 | 14.021 | 13.859 | 13.278 |
0.100 | 13.483 | 13.295 | 13.246 | 12.925 | 0.600 | 14.281 | 14.021 | 13.860 | 13.278 |
0.105 | 13.496 | 13.309 | 13.257 | 12.930 | 0.605 | 14.282 | 14.021 | 13.862 | 13.277 |
0.110 | 13.510 | 13.323 | 13.268 | 12.935 | 0.610 | 14.284 | 14.021 | 13.864 | 13.276 |
0.115 | 13.524 | 13.337 | 13.279 | 12.940 | 0.615 | 14.286 | 14.022 | 13.866 | 13.275 |
0.120 | 13.539 | 13.351 | 13.291 | 12.946 | 0.620 | 14.289 | 14.022 | 13.868 | 13.275 |
0.125 | 13.554 | 13.365 | 13.303 | 12.952 | 0.625 | 14.292 | 14.023 | 13.870 | 13.275 |
0.130 | 13.569 | 13.380 | 13.314 | 12.958 | 0.630 | 14.295 | 14.024 | 13.871 | 13.275 |
0.135 | 13.585 | 13.394 | 13.326 | 12.965 | 0.635 | 14.297 | 14.025 | 13.872 | 13.276 |
0.140 | 13.601 | 13.408 | 13.338 | 12.971 | 0.640 | 14.298 | 14.026 | 13.871 | 13.278 |
0.145 | 13.616 | 13.422 | 13.349 | 12.977 | 0.645 | 14.298 | 14.027 | 13.870 | 13.279 |
0.150 | 13.632 | 13.436 | 13.360 | 12.984 | 0.650 | 14.298 | 14.028 | 13.869 | 13.281 |
0.155 | 13.647 | 13.450 | 13.370 | 12.990 | 0.655 | 14.297 | 14.030 | 13.866 | 13.283 |
0.160 | 13.662 | 13.464 | 13.380 | 12.996 | 0.660 | 14.295 | 14.031 | 13.864 | 13.285 |
0.165 | 13.677 | 13.478 | 13.391 | 13.002 | 0.665 | 14.293 | 14.032 | 13.862 | 13.287 |
0.170 | 13.691 | 13.492 | 13.401 | 13.008 | 0.670 | 14.292 | 14.033 | 13.861 | 13.289 |
0.175 | 13.705 | 13.506 | 13.411 | 13.014 | 0.675 | 14.290 | 14.035 | 13.860 | 13.291 |
0.180 | 13.719 | 13.520 | 13.422 | 13.019 | 0.680 | 14.289 | 14.036 | 13.861 | 13.292 |
0.185 | 13.733 | 13.533 | 13.433 | 13.025 | 0.685 | 14.288 | 14.037 | 13.863 | 13.294 |
0.190 | 13.747 | 13.547 | 13.444 | 13.030 | 0.690 | 14.288 | 14.039 | 13.865 | 13.296 |
0.195 | 13.761 | 13.561 | 13.455 | 13.036 | 0.695 | 14.288 | 14.041 | 13.869 | 13.297 |
0.200 | 13.776 | 13.574 | 13.467 | 13.041 | 0.700 | 14.290 | 14.043 | 13.873 | 13.300 |
0.205 | 13.791 | 13.587 | 13.478 | 13.047 | 0.705 | 14.291 | 14.045 | 13.878 | 13.302 |
0.210 | 13.806 | 13.601 | 13.489 | 13.052 | 0.710 | 14.293 | 14.048 | 13.882 | 13.306 |
0.215 | 13.821 | 13.614 | 13.500 | 13.058 | 0.715 | 14.295 | 14.051 | 13.887 | 13.310 |
0.220 | 13.836 | 13.627 | 13.510 | 13.063 | 0.720 | 14.297 | 14.055 | 13.891 | 13.314 |
0.225 | 13.851 | 13.639 | 13.521 | 13.068 | 0.725 | 14.300 | 14.060 | 13.895 | 13.319 |
0.230 | 13.866 | 13.652 | 13.530 | 13.074 | 0.730 | 14.304 | 14.065 | 13.899 | 13.325 |
0.235 | 13.880 | 13.665 | 13.540 | 13.079 | 0.735 | 14.309 | 14.071 | 13.904 | 13.331 |
0.240 | 13.893 | 13.677 | 13.549 | 13.084 | 0.740 | 14.314 | 14.077 | 13.909 | 13.338 |
0.245 | 13.906 | 13.689 | 13.558 | 13.089 | 0.745 | 14.320 | 14.084 | 13.915 | 13.344 |
0.250 | 13.919 | 13.700 | 13.567 | 13.093 | 0.750 | 14.328 | 14.092 | 13.921 | 13.350 |
0.255 | 13.931 | 13.712 | 13.577 | 13.098 | 0.755 | 14.337 | 14.100 | 13.928 | 13.355 |
0.260 | 13.943 | 13.723 | 13.586 | 13.102 | 0.760 | 14.346 | 14.108 | 13.936 | 13.360 |
0.265 | 13.954 | 13.734 | 13.596 | 13.107 | 0.765 | 14.356 | 14.117 | 13.943 | 13.364 |
0.270 | 13.966 | 13.745 | 13.605 | 13.111 | 0.770 | 14.366 | 14.125 | 13.950 | 13.368 |
0.275 | 13.977 | 13.755 | 13.615 | 13.115 | 0.775 | 14.375 | 14.134 | 13.957 | 13.371 |
0.280 | 13.989 | 13.765 | 13.624 | 13.120 | 0.780 | 14.383 | 14.141 | 13.963 | 13.373 |
0.285 | 14.000 | 13.775 | 13.633 | 13.124 | 0.785 | 14.389 | 14.148 | 13.968 | 13.375 |
0.290 | 14.012 | 13.784 | 13.642 | 13.128 | 0.790 | 14.394 | 14.154 | 13.972 | 13.377 |
0.295 | 14.023 | 13.794 | 13.651 | 13.132 | 0.795 | 14.396 | 14.158 | 13.974 | 13.378 |
0.300 | 14.034 | 13.803 | 13.659 | 13.137 | 0.800 | 14.397 | 14.160 | 13.975 | 13.379 |
Table 1. Continued.
Phase | Phase | ||||||||
0.305 | 14.045 | 13.811 | 13.668 | 13.141 | 0.805 | 14.396 | 14.160 | 13.976 | 13.380 |
0.310 | 14.056 | 13.820 | 13.677 | 13.145 | 0.810 | 14.394 | 14.158 | 13.975 | 13.380 |
0.315 | 14.066 | 13.828 | 13.686 | 13.149 | 0.815 | 14.391 | 14.153 | 13.973 | 13.380 |
0.320 | 14.075 | 13.837 | 13.695 | 13.153 | 0.820 | 14.387 | 14.146 | 13.970 | 13.380 |
0.325 | 14.085 | 13.845 | 13.703 | 13.157 | 0.825 | 14.382 | 14.135 | 13.967 | 13.377 |
0.330 | 14.094 | 13.853 | 13.711 | 13.161 | 0.830 | 14.375 | 14.121 | 13.962 | 13.373 |
0.335 | 14.103 | 13.861 | 13.719 | 13.165 | 0.835 | 14.368 | 14.104 | 13.955 | 13.367 |
0.340 | 14.111 | 13.869 | 13.726 | 13.168 | 0.840 | 14.357 | 14.083 | 13.945 | 13.359 |
0.345 | 14.120 | 13.876 | 13.733 | 13.172 | 0.845 | 14.344 | 14.058 | 13.932 | 13.347 |
0.350 | 14.129 | 13.884 | 13.739 | 13.175 | 0.850 | 14.326 | 14.031 | 13.916 | 13.333 |
0.355 | 14.138 | 13.891 | 13.745 | 13.179 | 0.855 | 14.302 | 13.999 | 13.895 | 13.315 |
0.360 | 14.147 | 13.898 | 13.750 | 13.182 | 0.860 | 14.272 | 13.965 | 13.869 | 13.294 |
0.365 | 14.156 | 13.906 | 13.755 | 13.186 | 0.865 | 14.235 | 13.928 | 13.838 | 13.270 |
0.370 | 14.165 | 13.913 | 13.761 | 13.189 | 0.870 | 14.191 | 13.889 | 13.802 | 13.243 |
0.375 | 14.173 | 13.919 | 13.766 | 13.192 | 0.875 | 14.140 | 13.847 | 13.761 | 13.214 |
0.380 | 14.182 | 13.926 | 13.771 | 13.195 | 0.880 | 14.082 | 13.803 | 13.717 | 13.184 |
0.385 | 14.190 | 13.932 | 13.776 | 13.198 | 0.885 | 14.019 | 13.757 | 13.669 | 13.153 |
0.390 | 14.197 | 13.938 | 13.781 | 13.201 | 0.890 | 13.953 | 13.711 | 13.618 | 13.122 |
0.395 | 14.204 | 13.944 | 13.786 | 13.205 | 0.895 | 13.885 | 13.664 | 13.566 | 13.091 |
0.400 | 14.210 | 13.950 | 13.791 | 13.207 | 0.900 | 13.817 | 13.617 | 13.514 | 13.061 |
0.405 | 14.215 | 13.955 | 13.796 | 13.210 | 0.905 | 13.751 | 13.570 | 13.464 | 13.033 |
0.410 | 14.220 | 13.960 | 13.800 | 13.213 | 0.910 | 13.688 | 13.524 | 13.415 | 13.007 |
0.415 | 14.224 | 13.965 | 13.805 | 13.216 | 0.915 | 13.630 | 13.479 | 13.370 | 12.982 |
0.420 | 14.228 | 13.969 | 13.809 | 13.219 | 0.920 | 13.578 | 13.435 | 13.328 | 12.961 |
0.425 | 14.231 | 13.974 | 13.814 | 13.221 | 0.925 | 13.531 | 13.393 | 13.290 | 12.941 |
0.430 | 14.235 | 13.978 | 13.818 | 13.224 | 0.930 | 13.489 | 13.354 | 13.256 | 12.924 |
0.435 | 14.239 | 13.981 | 13.822 | 13.227 | 0.935 | 13.453 | 13.316 | 13.227 | 12.909 |
0.440 | 14.243 | 13.985 | 13.826 | 13.230 | 0.940 | 13.422 | 13.282 | 13.202 | 12.896 |
0.445 | 14.247 | 13.988 | 13.829 | 13.233 | 0.945 | 13.395 | 13.250 | 13.180 | 12.884 |
0.450 | 14.250 | 13.992 | 13.833 | 13.237 | 0.950 | 13.371 | 13.222 | 13.161 | 12.874 |
0.455 | 14.255 | 13.995 | 13.835 | 13.240 | 0.955 | 13.350 | 13.196 | 13.144 | 12.865 |
0.460 | 14.259 | 13.998 | 13.838 | 13.243 | 0.960 | 13.331 | 13.174 | 13.130 | 12.857 |
0.465 | 14.262 | 14.000 | 13.840 | 13.246 | 0.965 | 13.314 | 13.154 | 13.118 | 12.850 |
0.470 | 14.266 | 14.003 | 13.842 | 13.249 | 0.970 | 13.300 | 13.138 | 13.107 | 12.843 |
0.475 | 14.269 | 14.005 | 13.844 | 13.252 | 0.975 | 13.286 | 13.125 | 13.097 | 12.837 |
0.480 | 14.272 | 14.008 | 13.846 | 13.254 | 0.980 | 13.275 | 13.114 | 13.089 | 12.833 |
0.485 | 14.274 | 14.010 | 13.848 | 13.257 | 0.985 | 13.267 | 13.106 | 13.083 | 12.829 |
0.490 | 14.276 | 14.012 | 13.851 | 13.259 | 0.990 | 13.260 | 13.101 | 13.078 | 12.826 |
0.495 | 14.278 | 14.014 | 13.853 | 13.260 | 0.995 | 13.256 | 13.097 | 13.075 | 12.824 |