# Brian Skiff wrote to VSNET on 2002 Sep 2: # # The list below shows coordinates and UBVRI photometry for stars in the # field of the large open cluster IC 4665. Most of the data are from the work # of Menzies & Marang (1996MNRAS.282..313M). They observed the stars on at # least three nights each from South Africa directly against # Cousins E-region primary standards. The observations of the stars # in SA 109 show how well they match the Landolt system. # For one IC 4665 stars and for two more in the near region, I show Landolt # data for comparison and to extend the standards collection. L83a indicates # data from the main 1983 Landolt paper (1983AJ.....88..439L), L83b the # "equipment stability" paper (1983AJ.....88..853L), and L92 indicates the main # 1992 standards paper (1992AJ....104..340L). # # \Brian # # ------------------------------------------------------------------------------- # # UBVRI primary and secondary standards among stars in IC 4665 # # source: 1996MNRAS.282..313M # MENZIES J.W. and MARANG F. # Mon. Not. R. Astron. Soc., 282, 313-316 (1996) # UBV(RI)c observations of Johnson's standard sequence in IC 4665. # # version: 1 Sep 2002 # # I have modified the format slightly, putting positions # in decimal degrees and changing colors to magnitudes. # -- Michael Richmond Sep 2, 2002 # # Name RA (2000) Dec V B-V U-B V-R V-I HD_161184 265.96542 5.84500 7.974 8.108 8.043 7.997 7.903 HD_161242 266.05458 5.25056 10.186 9.086 7.806 7.135 5.832 HD_161261* 266.06542 5.71444 8.176 8.332 8.282 8.239 8.157 BD+05_3472 266.19708 5.20361 12.001 10.933 9.659 8.979 7.652 HD_161370 266.25375 5.52278 9.882 9.686 9.385 9.220 8.872 BD+05_3474 266.25833 5.83389 12.768 11.500 10.206 9.528 8.235 HD_161426 266.32208 5.66778 9.301 9.254 9.086 8.986 8.771 HD_161445 266.34625 5.56278 10.237 10.211 10.092 10.009 9.849 HD_161480 266.39042 5.71556 7.317 7.714 7.685 7.654 7.588 HD_161481 266.39500 5.42639 9.466 9.343 9.086 8.940 8.627 HD_161482 266.41458 5.19806 10.435 10.232 9.849 9.633 9.169 HD_161542 266.48000 5.90778 7.701 7.617 7.500 7.439 7.305 HD_161572 266.48792 5.69444 7.130 7.590 7.586 7.566 7.532 HD_161573 266.53042 5.53028 6.355 6.865 6.849 6.819 6.765 HD_161603 266.54542 5.65833 6.927 7.357 7.342 7.316 7.258 BD+05_3485 266.57875 5.93528 11.192 11.043 10.605 10.348 9.816 HD_161621 266.61167 5.70028 9.192 9.039 8.814 8.691 8.424 HD_161622 266.61792 5.39667 8.392 8.392 7.937 7.670 7.136 BD+05_3489 266.64083 5.29417 12.625 11.563 10.279 9.585 8.234 HD_161677 266.67083 5.77417 6.695 7.141 7.123 7.095 7.030 HD_161698 266.69458 5.56500 8.033 8.317 8.207 8.123 7.948 BD+05_3492 266.70125 5.19833 11.610 11.249 10.674 10.346 9.662 HD_161734 266.74083 5.42556 8.721 8.976 8.867 8.781 8.604 HD_161733 266.75917 5.69194 7.642 8.048 7.995 7.948 7.852 AG+05_2335 266.76250 5.69861 10.700 10.507 10.214 10.055 9.729 BD+05_3495 266.78583 5.22528 11.342 11.110 10.742 10.544 10.111 BD+05_3496 266.78167 5.50806 10.732 10.498 9.796 9.395 8.606 HD_161786 266.83958 5.75944 10.226 10.082 9.848 9.716 9.436 HD_161820 266.87083 5.60417 12.140 10.039 8.322 7.359 5.449 HD_161834 266.91333 5.11639 10.666 10.464 10.194 10.049 9.740 HD_161867 266.95208 5.36250 10.668 9.630 8.389 7.717 6.411 IC_4665_MM_32 266.98208 5.27917 12.264 11.845 10.903 10.375 9.335 HD_161980 267.09542 5.31000 11.272 10.198 8.948 8.288 7.021 HD_162028 267.18083 5.70139 7.138 7.517 7.504 7.485 7.447 HD_161223* 266.01500 6.06194 7.900 7.753 7.421 7.212 6.765 # 0.00000 0.00000 7.941 7.761 7.435 7.219 6.768 L83b BD+06_3520 266.35833 5.98833 10.330 10.335 9.772 9.439 8.771 IC_4665_MM_37 266.37083 6.02944 12.199 12.116 11.561 11.229 10.568 HD_161638 266.61917 6.23556 9.685 8.917 7.882 7.343 6.302 HD_161660* 266.65167 6.12056 7.235 7.745 7.758 7.736 7.703 # nearby Landolt standards HD_160233 264.66917 4.33611 8.195 9.041 9.095 9.098 9.124 L83a BD+04_3508 266.88875 4.83889 13.156 11.079 9.326 8.352 6.478 L83a # SA 109 stars HD_161961 267.15375 -2.19611 7.311 8.002 7.780 7.633 7.324 # 0.00000 0.00000 7.259 8.006 7.782 7.639 7.333 L83a HD_161304 266.21125 -0.13472 8.988 8.777 8.471 8.282 7.879 # 0.00000 0.00000 9.025 8.782 8.477 8.290 7.894 L83a BD-00_3353 266.33333 -0.43111 12.348 10.790 9.327 8.544 7.060 # 0.00000 0.00000 12.387 10.794 9.332 8.547 7.055 L92 HD_161427 266.37458 0.07000 10.178 9.816 9.010 8.558 7.686 # 0.00000 0.00000 10.163 9.819 9.017 8.562 7.684 L83a # Notes # HD 161261 V2315 Oph. # HD 161223 V2314 Oph. # HD 161660 V2323 Oph.