COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 1551 Konkoly Observatory Budapest 1979 February 14 BVRI OBSERVATIONS OF TWO SUSPECTED VARIABLES Observations on the Johnson BVRI system are reported for two suspected variables. The Purdue High Speed Photometer, described by Barnes et al. (1978); was used in making the observations. The instrumental system and reduction procedures are discussed by Moffett and Barnes (1979). Most of the observations were obtained on the 91-cm and 76-cm reflectors at McDonald Observatory and a few were also made on the 61-cm reflector at the Table Mountain Observatory and the No. 2, 91-cm telescope at Kitt Peak National Observatory. The results for the two suspected variables: BS2018 and BS8726 are given in Table I. The estimated uncertainties for a single observation are: V = +- 0.014, (B-V) = +- 0.009, (V-R) = +- 0.009, and (R-I) = +- 0.012. The General Catalogue of Variable Stars does not list BS2018 as a suspected variable but the results reported here clearly show variability over the 444 days covered. The GCVS lists BS8726 as suspected variable #102221 but over the 141 days covered by our observations, no strong variability was detected. THOMAS G. BARNES III THOMAS J. MOFFETT McDonald Observatory Department of Physics Department of Astronomy Purdue University The University of Texas West Lafayette, Indiana 47907 Austin, Texas 78712 References : Barnes, T.G., Evans, D.S., and Moffett, T.J., 1978, M.N.R.A.S., 183, 285. [BIBCODE 1978MNRAS.183..285B ] Moffett, T.J., and Barnes, T.G., 1979, P.A.S.P., (submitted). [BIBCODE 1979PASP...91..180M ] TABLE I SUSPECTED VARIABLES BS2018 ---------------------------------------------- HJD V (B-V) (V-R) (R-I) (2440000.+) ---------------------------------------------- 3128.79 6.195 1.675 1.683 1.387 3129.70 6.206 1.768 1.692 1.386 3130.82 6.202 1.714 1.585 1.383 3132.73 6.192 1.729 1.573 1.410 3135.87 6.195 1.727 1.590 1.372 3138.86 6.200 1.725 1.585 1.364 3144.77 6.243 1.744 1.596 1.374 3429.96 6.259 1.732 1.589 1.391 3508.82 6.251 1.724 1.633 1.325 3511.66 6.219 1.729 1.541 1.345 3516.67 6.248 1.728 1.638 1.317 3517.77 6.273 1.718 1.640 1.320 3564.59 6.268 1.768 1.654 1.275 3572.62 6.294 1.703 1.707 1.288 BS8726= # 102221 3367.00 4.977 1.779 1.363 1.027 3371.00 4.966 1.771 1.368 1.016 3376.99 4.960 1.778 1.353 1.044 3377.88 4.982 1.779 1.382 1.013 3397.86 4.986 1.771 1.370 1.024 3398.85 4.997 1.756 1.362 1.040 3427.68 5.004 1.809 1.375 1.016 3496.60 5.006 1.797 1.394 1.015 3508.56 5.022 1.804 1.415 1.007 ----------------------------------------------