Free Access

Table A.1

Standard UBV magnitudes of all comparison stars used by various investigators in their differential photometries of Y Cyg.

Star HD V (B − V) (U − B) No. Station

BD+ 33°4062 9402 ± 0.011 0487 0018 9 01

BD+ 34°4180 198 692 6647 ± 0.011 1018 0802 33 01
BD+ 34°4180 198 692 6637 ± 0.007 1027 0832 11 16
BD+ 34°4180 198 692 6645 ± 0.008 146 61
BD+ 34°4180 198 692 6633 ± 0.011 1029 0811 56 78

HR 7996 198 820 6421 ± 0.007 0132 0618 8 01
HR 7996 198 820 6424 ± 0.007 214 61

BD+ 34°4196 199 007 7953 ± 0.014 0059 0310 72 01
BD+ 34°4196 199 007 7950 ± 0.007 0059 0319 11 16
BD+ 34°4196 199 007 7959 ± 0.012 138 61
BD+ 34°4196 199 007 7955 ± 0.014 0060 0310 99 78

BD+ 37°4235 202 349 7354 ± 0.009 0167 0971 149 01
BD+ 37°4235 202 349 7356 ± 0.010 161 61

70 Cyg 204 403 5307 ± 0.009 0149 0654 108 01
70 Cyg 204 403 5306 ± 0.007 0149 0655 58 16
70 Cyg 204 403 5307 ± 0.006 200 61
70 Cyg 204 403 5307 ± 0.012 0149 0655 109 78

Notes. The values we derived from the calibrated and carefully reduced all-sky UBV observations obtained during several seasons at Hvar (station 01) were added to the appropriate magnitude differences for all differential data sets from the literature. We also tabulate the mean all-sky values derived from the final reduction of Fairborn APT and Sejong observations. For comparison, the mean V magnitude based on the transformation of the Hipparcos Hp magnitude to Johnson V after Harmanec (1998) is also tabulated for all comparison stars used. The number (No.) of individual calibrated all-sky observations on which the mean values are based is also given. Stations: 1) Hvar; 16) Fairborn T5; 61) Hipparcos; 78) Sejong.

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.