IAU COMMISSION 27 UNPUBLISHED DATA FILE 227 Longterm Behaviour of Starspots. I. Polar Starspots, rotational modulation and flare Activity of V833 Tauri. K. Olah(1) and B.R. Pettersen(2) (1) Konkoly Observatory, Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest Hungary (2) Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, N-0315 Os Content: 4 v, 11 UBV, 19 ubvr, 34 UBVRI observations R and I in the Cousins system Astronomy and Astrophysics, 242,443 (1991) ******************************************************************************* Second page ---------- COMPARISON STAR; HD 283749 = SAO 76671 Table I. V833 TAU Observations from McDonald Observatory, instrumental system (ubv observations are in the Johnson, red observations are in the Cousins system) 76 and 91 cm telescopes H.J.D. delta v (u-b) (b-v) (v-r) 45618.868 -1.313 .832 .564 .299 45620.861 -1.317 .755 .549 .295 45621.960 -1.292 .825 .564 .291 45622.919 -1.310 .818 .569 .293 45623.907 -1.304 .829 45624.850 -1.300 .836 .561 .293 45667.725 -1.307 ---- ---- ---- 45671.696 -1.292 ---- ---- ---- 45672.722 -1.315 ---- ---- ---- 45673.701 -1.288 ---- ---- ---- 45679.840 -1.314 .796 .568 .277 45680.740 -1.291 .810 .573 .290 45680.774 -1.284 .826 .566 .292 45680.818 -1.289 .824 .558 .291 45681.807 -1.314 .825 .555 .277 45681.831 -1.313 .823 .563 .28 45681.861 -1.307 .821 .552 .296 45681.878 -1.311 .814 .554 .280 45683.729 -1.315 .822 .560 .287 45683.744 -1.314 .824 .564 .296 45683.785 -1.312 .833 .565 .282 45683.807 -1.313 .820 .571 . 45717.617 -1.320 .828 .569 .290 Third page ---------- Table II. V833 TAU Observations from Konkoly Observatory, Johnson UBV system 50 cm telescope H.J.D. delta V B U B-V U-B 47098.569 -1.214 -.670 .192 .544 .862 47100.472 -1.219 -.680 .191 .537 .871 47179.236 -1.187 -.634 .228 .553 .862 47179.370 -1.189 -.647 .223 .542 .870 47181.359 -1.191 -.657 .214 .534 .871 47182.254 -1.191 -.65 47201.348 -1.189 -.648 .210 .541 .858 47206.304 -1.192 -.655 .207 .537 .862 47213.275 -1.173 -.630 .212 .543 .842 47239.280 -1.174 -.633 .222 .541 .855 47936.323 -1.312 -.8 V833 TAU Observations from the Konkoly Observatory, Johnson UBV and Cousins RI system 1m telescope H.J.D. delta V U-B B-V V-R V-I 47424.611 -1.146 0.871 0.550 0.348 0.654 47438.616 -1.142 0.865 0.552 0.3 47443.547 -1.157 0.854 0.548 0.347 0.648 47449.625 -1.170 0.852 0.558 0.330 0.640 47450.598 -1.174 0.879 0.550 0.333 0.636 47451.575 -1.167 0.871 0.550 0.340 0.652 47476.551 -1.177 0.861 0.530 0.341 0.641 47477.491 -1.182 0.860 0.556 0.331 0.632 47482.552 -1.201 0.846 0.538 0.337 0.642 47527.547 -1.245 0.874 0.498 0.353 0.635 47531.436 -1.223 0.850 0.531 0. 47541.383 -1.226 0.887 0.486 0.353 0.637 47545.394 -1.258 0.865 0.521 0.333 0.627 47552.330 -1.243 0.881 0.480 0.334 0.628 47575.251 -1.237 0.868 0.523 0.345 0.638 47575.338 -1.240 0.883 0.512 0 47592.283 -1.237 0.838 0.511 0.347 0.635 47593.272 -1.237 0.845 0.514 0.351 0.621 47605.273 -1.217 0.870 0.511 0.352 0.642 47803.535 -1.223 0.859 0.476 0.359 0.638 47803.565 -1.239 0.876 0.492 0 47804.527 -1.245 0.875 0.496 0.342 0.635 47805.516 -1.249 0.869 0.500 0.342 0.613 47842.597 -1.253 0.859 0.490 0.337 0.627 47852.484 -1.284 0.872 0.481 0.340 0.624 47854.450 -1.297 0.859 0.486 0.338 0.618 47860.569 -1.265 0.831 0.524 0.333 0.616 47868.506 -1.293 0.862 0.493 0.334 0.607 47869.554 -1.281 0.808 0.513 0.328 0.604 47897.329 -1.298 0.828 0.483 0. 47898.375 -1.282 0.871 0.512 0.332 0.605 47906.300 -1.302 0.864 0.502 0.333 0.601 47919.226 -1.286 0.846 0.476 0.330 0.620 47929.238 -1.298 0.854 0.519 0.317 0.604