IAU COMMISSION 27 UNPUBLISHED DATA FILE No 87 18 pages, including cover sheet September, 1981 PHOTOELECTRIC PHOTOMETRY OF HR 7275 Differential photometry of the RS CVn-type binary HR 7275 in 1978, 1979, and 1980 at nine different observatories is presented. More information can be found in a paper recently submitted to Astrphysics and Space Science. Douglas S. Hall Dept. of Physics and Astronomy Vanderbilt University NASHVILLE, TN 37235 USA ************************************************************************** %UDF#87 %STAR HR 7275 %COMP IAU 27 %AUTH Hall D.S. %LIEU Kutztown %OBS Chambliss %TYPE Relative %DATE 1978 %HEAD JD DV 2443781.5559 -0.316 2443784.5078 -0.322 2443791.5106 -0.381 2443799.5374 -0.442 2443802.5083 -0.444 2443809.4871 -0.317 2443810.5511 -0.311 2443811.5581 -0.310 2443812.4860 -0.300 2443813.4800 -0.329 2443814.4960 -0.345 2443815.5010 -0.360 2443816.5169 -0.365 2443822.5198 -0.381 2443823.4847 -0.376 2443832.4905 -0.428 2443841.4823 -0.350 2443848.4661 -0.381 2443849.4771 -0.385 2443858.4639 -0.435 %LIEU Landis Observatory %OBS Landis %HEAD JD DV %DATE 1978 2443752.6171 -0.308 2443752.6208 -0.325 2443752.6290 -0.329 2443755.5499 -0.337 2443755.5532 -0.318 2443755.5563 -0.324 2443770.5484 -0.456 2443770.5511 -0.449 2443770.5537 -0.461 2443783.5379 -0.340 2443783.5405 -0.330 2443783.5433 -0.328 2443784.5380 -0.333 2443784.5410 -0.341 2443784.5434 -0.335 2443786.5322 -0.364 2443786.5350 -0.362 2443786.5373 -0.352 2443787.5383 -0.374 2443787.5411 -0.378 2443790.5275 -0.385 2443790.5299 -0.389 2443790.5323 -0.380 2443792.5510 -0.386 2443792.5440 -0.391 2443792.5467 -0.385 2443793.5295 -0.391 2443793.5322 -0.393 2443797.5387 -0.415 2443797.5414 -0.416 2443797.5436 -0.410 2443798.5202 -0.439 2443798.5235 -0.437 2443799.5595 -0.452 2443799.5629 -0.453 2443800.5161 -0.457 2443800.5188 -0.458 2443802.5207 -0.451 2443802.5230 -0.456 2443802.5254 -0.455 2443804.5325 -0.425 2443804.5349 -0.420 2443806.5512 -0.390 2443806.5537 -0.383 2443812.5570 -0.310 2443812.5598 -0.323 2443814.5403 -0.361 2443814.5428 -0.360 2443823.5093 -0.382 2443823.5126 -0.402 %LIEU Louth Observatory %OBS Louth %HEAD JD DV %DATE 1978 2443721.7529 -0.374 2443722.7140 -0.359 2443723.7560 -0.341 2443726.7234 -0.323 2443727.7154 -0.335 2443747.7293 -0.421 2443770.6718 -0.457 2443770.6746 -0.457 2443770.6775 -0.456 2443784.6703 -0.334 2443784.6727 -0.335 2443784.6752 -0.329 2443785.6682 -0.358 2443785.6704 -0.353 2443785.6723 -0.350 2443790.7408 -0.386 2443790.7431 -0.387 2443790.7452 -0.389 2443794.6695 -0.397 2443794.6725 -0.388 2443794.6750 -0.391 2443795.7013 -0.415 2443795.7038 -0.411 2443795.7050 -0.410 2443806.6414 -0.366 2443806.6446 -0.381 2443806.6472 -0.374 2443814.6856 -0.353 2443814.6875 -0.361 2443814.6900 -0.339 2443833.6142 -0.408 2443833.6174 -0.403 2443833.6190 -0.406 2443849.5956 -0.376 2443849.5976 -0.379 2443870.5729 -0.382 2443870.5757 -0.394 2443870.5796 -0.396 2443871.5852 -0.399 2443871.5882 -0.390 2443871.5910 -0.394 2443872.5817 -0.392 2443872.5840 -0.393 2443872.5868 -0.396 %LIEU Hickox Observatory %OBS Lowell %HEAD JD DV %DATE 1978 2443702.6099 -0.409 2443702.6141 -0.399 2443702.6183 -0.401 2443704.6148 -0.397 2443704.6196 -0.404 2443704.6252 -0.387 2443706.6058 -0.432 2443706.6099 -0.447 2443706.6155 -0.447 2443734.5822 -0.422 2443734.5863 -0.420 2443734.5912 -0.423 2443737.5655 -0.409 2443737.5690 -0.411 2443737.5745 -0.422 2443741.5606 -0.446 2443741.5641 -0.435 2443741.5683 -0.438 2443743.5724 -0.458 2443743.5828 -0.460 2443752.5361 -0.335 2443752.5431 -0.332 2443752.5472 -0.316 2443753.6174 -0.332 2443753.6208 -0.305 2443753.6243 -0.338 2443754.5451 -0.296 2443754.5486 -0.306 2443754.5548 -0.327 2443756.5333 -0.292 2443756.5375 -0.294 2443756.5417 -0.336 2443757.6208 -0.343 2443757.6278 -0.350 2443757.6361 -0.357 2443775.5899 -0.450 2443775.5940 -0.433 2443775.5989 -0.435 2443776.6218 -0.432 2443776.6260 -0.426 2443776.6323 -0.416 2443778.6537 -0.351 2443778.6585 -0.362 2443778.6641 -0.362 2443780.6287 -0.330 2443780.6342 -0.335 2443780.6384 -0.323 2443821.5213 -0.378 2443821.5269 -0.395 2443821.5317 -0.400 2443822.6213 -0.360 2443822.6276 -0.360 2443822.6324 -0.370 2443823.4775 -0.413 2443823.4816 -0.409 2443823.4858 -0.381 %LIEU Skillman Observatory %OBS Skillman %HEAD JD DV %DATE 1978 2443696.6098 -0.355 2443696.6105 -0.352 2443696.6126 -0.346 2443696.6133 -0.347 2443697.5897 -0.308 2443697.5904 -0.319 2443697.5932 -0.353 2443697.5939 -0.347 2443701.5829 -0.367 2443701.5835 -0.365 2443701.5856 -0.372 2443701.6092 -0.372 2443705.5856 -0.390 2443705.5870 -0.405 2443705.5877 -0.383 2443705.5905 -0.407 2443705.5912 -0.401 2443711.6058 -0.455 2443711.6065 -0.454 2443711.6106 -0.463 2443711.6113 -0.468 2443753.5813 -0.315 2443753.5820 -0.323 2443753.5840 -0.339 2443753.6090 -0.321 2443757.5743 -0.353 2443757.5750 -0.339 2443757.5764 -0.352 2443757.5771 -0.346 2443765.6165 -0.387 2443765.6172 -0.384 2443772.5421 -0.473 2443772.5424 -0.505 2443772.5435 -0.447 2443772.5442 -0.447 2443777.5302 -0.395 2443777.5309 -0.399 2443777.5323 -0.406 2443777.5329 -0.403 2443780.5794 -0.324 2443780.5801 -0.316 2443780.5815 -0.328 2443780.5822 -0.331 2443786.5222 -0.380 2443786.5229 -0.366 2443786.5243 -0.370 2443786.5250 -0.374 2443791.5610 -0.405 2443791.5617 -0.401 2443791.5624 -0.397 2443791.5631 -0.393 2443802.4968 -0.454 2443802.4975 -0.464 2443802.4982 -0.461 2443802.4989 -0.458 2443809.5189 -0.322 2443809.5195 -0.316 2443809.5209 -0.318 2443809.5216 -0.324 2443814.5201 -0.356 2443814.5208 -0.357 2443814.5215 -0.355 2443814.5222 -0.353 2443821.5255 -0.401 2443821.5262 -0.411 2443821.5276 -0.381 2443821.5283 -0.396 %LIEU Kutztown Observatory %OBS Chambliss %HEAD JD DV %DATE 1979 2444132.5952 -0.365 2444133.5801 -0.355 2444136.6141 -0.302 2444160.6045 -0.372 2444169.5622 -0.282 2444177.6020 -0.358 2444182.5299 -0.453 2444194.5345 -0.299 2444210.5161 -0.461 %LIEU Dyer Observatory %OBS Henry %HEAD JD DV DB %DATE 1979 2444183.5445 -0.450 -0.357 2444173.5495 -0.454 -0.357 2444191.5584 -0.358 -0.287 2444191.5633 -0.363 -0.272 2444191.5687 -0.346 -0.252 2444197.5716 -0.301 -0.191 2444197.5767 -0.294 -0.194 2444197.5818 -0.291 -0.192 2444209.5236 -0.454 -0.362 2444209.5296 -0.455 -0.371 2444209.5351 -0.454 -0.372 %LIEU Kitt Peak National Observatory %OBS Henry %HEAD JD DV DB %DATE 1979 2444153.7218 -0.441 -0.342 2444153.7276 -0.426 -0.328 2444153.7344 -0.438 -0.335 2444154.7006 -0.434 -0.334 2444154.7066 -0.434 -0.336 2444154.7121 -0.430 -0.336 2444156.6872 -0.426 -0.328 2444156.6928 -0.425 -0.320 2444156.6987 -0.430 -0.333 2444157.7088 -0.418 -0.321 2444157.7144 -0.427 -0.321 2444157.7200 -0.426 -0.316 2444158.7313 -0.413 -0.308 2444158.7370 -0.416 -0.310 2444158.7428 -0.407 -0.311 2444159.6733 -0.401 -0.296 2444159.6802 -0.401 -0.303 2444159.6856 -0.401 -0.301 2444160.6878 -0.388 -0.281 2444160.6954 -0.388 -0.277 2444160.7008 -0.387 -0.279 2444161.7038 -0.376 -0.275 2444161.7104 -0.376 -0.276 2444161.7166 -0.375 -0.276 2444162.6870 -0.385 -0.260 2444162.6932 -0.384 -0.259 2444162.6989 -0.361 -0.261 2444163.6777 -0.344 -0.242 2444163.6835 -0.349 -0.240 %LIEU Landis Observatory %OBS Landis %HEAD JD DV %DATE 1979 2444196.4909 -0.243 2444196.4937 -0.282 2444196.4968 -0.286 2444197.5260 -0.273 2444197.5291 -0.279 2444198.5869 -0.325 2444198.5903 -0.305 2444205.5041 -0.424 2444205.5064 -0.424 %LIEU Louth Observatory %OBS Louth %HEAD JD DV %DATE 1979 2444078.7369 -0.341 2444078.7390 -0.344 2444078.7412 -0.345 2444094.7571 -0.390 2444094.7595 -0.392 2444094.7616 -0.393 2444126.7198 -0.419 2444126.7218 -0.420 2444133.6885 -0.361 2444133.6902 -0.362 2444133.6918 -0.351 2444184.6844 -0.441 2444184.6870 -0.451 2444184.6896 -0.442 2444189.5969 -0.385 2444189.5886 -0.387 2444189.6001 -0.388 %LIEU Hickox Observatory %OBS Lowell %HEAD JD DV %DATE 1979 2444059.6195 -0.327 2444059.6230 -0.338 2444059.6286 -0.356 2444060.6119 -0.348 2444060.6154 -0.362 2444060.6195 -0.353 2444062.6175 -0.363 2444062.6202 -0.348 2444062.6237 -0.367 2444071.6009 -0.384 2444071.6037 -0.409 2444071.6058 -0.427 2444073.6134 -0.370 2444073.6162 -0.398 2444073.6196 -0.371 2444074.6162 -0.369 2444074.6190 -0.392 2444074.6224 -0.373 2444075.5988 -0.408 2444075.6023 -0.409 2444075.6058 -0.404 2444076.6183 -0.428 2444076.6224 -0.419 2444084.5788 -0.347 2444084.5823 -0.324 2444084.5857 -0.306 2444092.5628 -0.380 2444092.5656 -0.388 2444092.5718 -0.384 2444098.5592 -0.410 2444098.5634 -0.393 2444098.5662 -0.408 %LIEU Kitt Peak National Observatory %OBS Eaton %HEAD JD DV %DATE 1980 2444528.6593 -0.367 2444529.5986 -0.368 2444530.6217 -0.332 2444531.6273 -0.303 2444532.6382 -0.286 2444533.6092 -0.275 2444534.6219 -0.286 2444535.6086 -0.297 2444536.6066 -0.337 2444537.5985 -0.376 2444539.5927 -0.447 2444541.5977 -0.497 2444542.5851 -0.500 2444543.5922 -0.506 2444544.6271 -0.499 2444545.6160 -0.467 2444546.6032 -0.457 2444547.6026 -0.442 %LIEU Braeside Observatory %OBS Fried %HEAD JD DV %DATE 1980 2444380.8944 -0.417 2444380.8999 -0.418 2444380.9048 -0.416 2444381.8819 -0.424 2444381.8874 -0.425 2444381.8916 -0.429 2444419.8285 -0.294 2444419.8340 -0.291 2444419.8389 -0.298 2444420.8014 -0.273 2444420.8056 -0.277 2444420.8104 -0.278 2444424.7953 -0.350 2444424.8001 -0.343 2444424.8043 -0.348 2444425.7800 -0.371 2444425.7869 -0.374 2444425.7918 -0.375 2444426.7723 -0.393 2444426.7772 -0.401 2444426.7828 -0.405 2444435.7933 -0.398 2444435.7981 -0.405 2444435.8023 -0.402 2444436.7717 -0.393 2444436.7780 -0.393 2444436.7829 -0.391 2444444.8330 -0.420 2444444.8378 -0.413 2444444.8434 -0.411 2444448.8149 -0.280 2444448.8211 -0.281 2444448.8267 -0.286 2444449.7698 -0.279 2444449.7746 -0.275 2444449.7788 -0.276 %LIEU Dyner Observatory %OBS Henry %HEAD JD DV %DATE 1980 2444402.8089 -0.438 2444402.8121 -0.437 2444402.8155 -0.438 2444417.8351 -0.372 2444417.8376 -0.372 2444417.8400 -0.379 2444433.8349 -0.424 2444433.8375 -0.428 2444433.8401 -0.432 2444435.7711 -0.406 2444435.7734 -0.406 2444435.7759 -0.412 2444449.7945 -0.313 2444449.7974 -0.295 2444449.8000 -0.301 2444451.6662 -0.328 2444451.6690 -0.330 2444451.6717 -0.322 2444453.6602 -0.385 2444453.6633 -0.388 2444453.6659 -0.386 2444454.7290 -0.422 2444454.7316 -0.426 2444454.7342 -0.417 2444458.7136 -0.461 2444458.7159 -0.459 2444458.7182 -0.458 2444459.6798 -0.458 2444459.6829 -0.451 2444459.6858 -0.458 2444472.6429 -0.434 2444472.6455 -0.429 2444472.6478 -0.430 2444474.7054 -0.344 2444474.7079 -0.350 2444474.7102 -0.356 2444483.6194 -0.453 2444483.6221 -0.445 2444483.6248 -0.447 2444526.5962 -0.406 2444526.5988 -0.405 2444526.6013 -0.404 2444535.6058 -0.306 2444535.6084 -0.294 2444535.6111 -0.305 2444536.5547 -0.333 2444536.5575 -0.332 2444536.5600 -0.329 2444538.6115 -0.413 2444538.6142 -0.410 2444538.6169 -0.401 2444545.5571 -0.474 2444545.5596 -0.473 2444545.5623 -0.472 2444549.5392 -0.400 2444549.5418 -0.398 2444549.5442 -0.401 2444550.5176 -0.395 2444550.5197 -0.392 2444550.5218 -0.390 2444554.5266 -0.383 2444554.5289 -0.385 2444554.5314 -0.386 2444555.5453 -0.372 2444555.5474 -0.376 2444555.5495 -0.378 2444556.5286 -0.369 2444556.5309 -0.368 2444556.5331 -0.364 2444569.5090 -0.488 2444569.5115 -0.485 2444569.5140 -0.482 %LIEU Kitt Peak National Observatory %OBS Henry %HEAD JD DV %DATE 1980 2444497.6516 -0.420 2444497.6543 -0.414 2444497.6571 -0.421 2444498.6790 -0.433 2444498.6817 -0.431 2444498.6843 -0.429 2444499.6470 -0.426 2444499.6496 -0.425 2444499.6521 -0.423 2444501.6401 -0.382 2444501.6429 -0.382 2444501.6456 -0.384 2444502.6462 -0.346 2444502.6489 -0.344 2444502.6517 -0.341 2444503.6515 -0.313 2444503.6541 -0.308 2444503.6569 -0.310 2444505.6426 -0.280 2444505.6451 -0.279 2444505.6477 -0.281 2444506.6627 -0.290 2444506.6654 -0.288 2444506.6681 -0.290 2444509.7499 -0.381 2444509.7522 -0.381 2444509.7545 -0.383 2444510.6732 -0.409 2444510.6753 -0.416 2444510.6777 -0.413 2444511.6423 -0.443 2444511.6450 -0.442 2444511.6478 -0.439 2444512.6524 -0.460 2444512.6552 -0.463 2444512.6579 -0.466 2444513.6529 -0.478 2444513.6557 -0.480 2444513.6591 -0.472 %LIEU Krisciunas Observatory %OBS Krisciunas %HEAD JD DV %DATE 1980 2444550.6609 -0.383 2444550.6637 -0.426 2444550.6665 -0.408 %LIEU Louth Observatory %OBS Louth %HEAD JD DV %DATE 1980 2444409.8726 -0.418 2444409.8743 -0.417 2444409.8762 -0.414 2444421.8107 -0.281 2444421.8129 -0.279 2444421.8153 -0.283 2444427.8040 -0.438 2444427.8065 -0.437 2444427.8091 -0.430 2444437.8695 -0.403 2444437.8721 -0.408 2444437.8739 -0.409 2444444.7945 -0.429 2444444.7968 -0.426 2444444.7994 -0.423 2444451.7845 -0.320 2444451.7868 -0.326 2444451.7890 -0.325 2444461.7808 -0.437 2444461.7836 -0.433 2444461.7864 -0.432 2444515.6783 -0.477 2444515.6803 -0.478 2444515.6827 -0.477 2444539.6459 -0.443 2444539.6477 -0.436 2444555.6449 -0.370 2444555.6475 -0.370 2444555.6513 -0.365