Infrared Differential Magnitudes of BI Vul From IAU Unpublished Data File No. 128 (Bradstreet 1985) HJD dmagI (2400000+) 44756.9023 2.673 44756.9026 2.678 44756.9043 2.716 44756.9048 2.716 44756.9068 2.860 44756.9073 2.824 44756.9091 2.819 44756.9095 2.837 44756.9220 2.925 44756.9225 2.924 44756.9241 2.899 44756.9246 2.890 44756.9266 2.873 44756.9270 2.869 44756.9351 2.667 44756.9355 2.674 44756.9374 2.635 44756.9379 2.630 44756.9399 2.589 44756.9404 2.585 44756.9420 2.554 44756.9425 2.553 44756.9487 2.474 44756.9491 2.472 44756.9496 2.473 44756.9513 2.474 44756.9517 2.465 44756.9537 2.450 44756.9541 2.447 44756.9557 2.452 44756.9562 2.443 44756.9634 2.396 44756.9638 2.390 44756.9643 2.395 44757.8610 2.305 44757.8615 2.307 44757.8635 2.303 44757.8640 2.299 44757.8656 2.306 44757.8661 2.305 44757.8686 2.314 44757.8691 2.316 44757.8780 2.325 44757.8785 2.326 44757.8827 2.357 44757.8932 2.371 44757.8849 2.387 44757.8954 2.389 44757.8975 2.375 44757.8880 2.383 44757.8900 2.410 44757.8904 2.409 44757.9000 2.485 44757.9004 2.493 44757.9020 2.518 44757.9025 2.544 44757.9046 2.564 44757.9050 2.577 44757.9055 2.584 44757.9072 2.621 44757.9076 2.625 44757.9140 2.768 44757.9145 2.781 44757.9150 2.785 44757.9166 2.810 44757.9170 2.805 44757.9189 2.871 44757.9194 2.875 44757.9213 2.909 44757.9218 2.927 44757.9235 2.946 44757.9239 2.950 44757.9265 2.930 44757.9270 2.939 44757.9318 2.856 44757.9323 2.849 44757.9339 2.822 44757.9343 2.812 44757.9363 2.777 44757.9367 2.766 44757.9384 2.740 44757.9389 2.728 44757.9413 2.699 44757.9418 2.683 44757.9433 2.653 44757.9438 2.627 44757.9487 2.562 44757.9492 2.574 44757.9508 2.560 44757.9512 2.566 44757.9531 2.537 44757.9536 2.523 44757.9583 2.480 44757.9587 2.484 44757.9604 2.464 44757.9644 2.416 44757.9649 2.413 44757.9654 2.420 44760.8106 2.769 44760.8110 2.780 44760.8130 2.802 44760.8134 2.812 44760.8153 2.850 44760.8158 2.863 44760.8176 2.904 44760.8180 2.911 44760.8199 2.930 44760.8204 2.920 44760.8224 2.917 44760.8229 2.915 44760.8247 2.890 44760.8252 2.890 44760.8297 2.832 44760.8301 2.829 44760.8320 2.802 44760.8325 2.781 44760.8344 2.747 44760.8348 2.734 44760.8367 2.715 44760.8372 2.698 44760.8390 2.667 44760.8395 2.654 44760.8413 2.616 44760.8418 2.602 44760.8467 2.523 44760.8471 2.511 44760.8492 2.492 44760.8496 2.482 44760.8516 2.466 44760.8521 2.464 44760.8539 2.440 44760.8544 2.435 44760.8563 2.430 44760.8568 2.429 44760.8588 2.421 44760.8593 2.418 44760.8643 2.393 44760.8648 2.379 44760.8666 2.362 44760.8671 2.358 44760.8675 2.352 44760.8694 2.344 44760.8699 2.345 44760.8704 2.340 44760.8722 2.327 44760.8727 2.336 44760.8748 2.315 44760.8752 2.316 44760.8804 2.323 44760.8809 2.320 44760.8826 2.318 44760.8847 2.319 44760.8852 2.314 44760.8870 2.313 44760.8875 2.316 44760.8895 2.319 44760.8900 2.322 44760.8919 2.319 44760.8924 2.315 44760.8973 2.311 44760.8977 2.308 44760.8998 2.316 44760.9003 2.325 44760.9022 2.337 44760.9026 2.333 44760.9047 2.359 44760.9052 2.355 44760.9076 2.366 44760.9080 2.364 44760.9132 2.414 44760.9137 2.405 44760.9156 2.419 44760.9161 2.430 44760.9180 2.452 44760.9185 2.460 44760.9205 2.485 44760.9209 2.486 44760.9229 2.505 44760.9233 2.527 44760.9250 2.548 44760.9255 2.551 44760.9307 2.645 44760.9311 2.659 44760.9330 2.696 44760.9335 2.695 44760.9352 2.726 44760.9357 2.732 44760.9377 2.783 44760.9381 2.800 44760.9400 2.833 44760.9405 2.838 44760.9426 2.880 44760.9431 2.877 44760.9451 2.900 44760.9487 2.921 44760.9491 2.918 44760.9508 2.925 44760.9512 2.917 44760.9531 2.898 44760.9535 2.889 44760.9552 2.863 44760.9556 2.859 44760.9601 2.763 44760.9606 2.757 44760.9611 2.747 44760.9615 2.732 44825.7095 2.414 44825.7115 2.397 44825.7119 2.402 44825.7139 2.390 44825.7144 2.376 44825.7214 2.351 44825.7219 2.360 44825.7238 2.356 44825.7243 2.344 44825.7260 2.321 44825.7265 2.317 44825.7283 2.324 44825.7288 2.305 44825.7306 2.315 44825.7310 2.321 44825.7375 2.338 44825.7379 2.338 44825.7399 2.351 44825.7404 2.348 44825.7423 2.370 44825.7427 2.390 44825.7445 2.372 44825.7450 2.372 44825.7470 2.391 44825.7475 2.382 44825.7545 2.445 44825.7550 2.434 44825.7568 2.443 44825.7573 2.432 44825.7592 2.435 44825.7597 2.452 44825.7615 2.466 44825.7620 2.477 44825.7638 2.477 44825.7643 2.485 44825.7714 2.577 44825.7719 2.593 44825.7737 2.633 44825.7742 2.638 44825.7761 2.698 44825.7766 2.700 44825.7787 2.768 44825.7792 2.777 44825.7811 2.814 44825.7816 2.806 44825.7877 2.856 44825.7881 2.876 44825.7900 2.903 44825.7905 2.916 44825.7924 2.899 44825.7928 2.892 44825.7948 2.902 44825.7953 2.901 44825.7971 2.882 44825.7976 2.881 44825.7995 2.857 44825.8000 2.842 44825.8018 2.829 44825.8023 2.810 44825.8087 2.675 44825.8092 2.666 44825.8110 2.634 44825.8115 2.644 44825.8133 2.611 44825.8138 2.600 44825.8157 2.565 44825.8162 2.571 44825.8182 2.528 44825.8187 2.508 44825.8207 2.503 44825.8211 2.491 44825.8279 2.404 44825.8284 2.423 44825.8304 2.403 44825.8308 2.405 44825.8328 2.383 44825.8333 2.389 44825.8350 2.359 44825.8355 2.347 44825.8375 2.349 44825.8379 2.354