# Subaru Telescope Primary Mirror In-Situ Measured Reflectivity # Coated with Aluminum on 2017-10-20 # Opened the vacuum chamber on 2017-11-21 # Measured with Subaru Portable Spectrophotometer (SPS) on 2019-04-26 (533 days after, post CO2 cleaning) # Measured three times at around the position 3 # Data between 950 nm and 1650 nm are also available (SPS-XWW). # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) Pos.3 #1 Pos.3 #2 Pos.3 #3 1000 89.34 90.08 91.13 998 89.87 89.55 89.85 996 89.65 90.02 90.01 994 90.48 90.23 89.89 992 89.69 89.41 90.74 990 89.85 89.51 90.22 988 89.40 89.49 88.87 986 89.71 89.65 89.85 984 89.27 89.72 89.79 982 89.69 89.61 89.05 980 89.42 88.94 89.93 978 89.42 89.10 89.50 976 89.75 89.37 89.16 974 89.47 88.91 88.61 972 89.56 89.02 89.05 970 89.49 89.23 89.03 968 90.01 89.41 89.50 966 89.25 88.92 89.55 964 89.41 89.42 89.49 962 89.45 88.62 89.58 960 89.99 88.84 89.05 958 89.45 88.36 89.74 956 88.94 89.12 88.43 954 88.82 88.65 89.05 952 89.33 88.76 88.55 950 88.76 89.12 88.74 948 88.03 88.33 88.70 946 88.53 88.66 88.60 944 88.26 88.46 88.67 942 88.80 88.15 88.30 940 88.13 88.20 88.49 938 88.06 87.98 88.15 936 87.64 87.65 87.94 934 87.59 87.85 87.70 932 87.67 87.26 87.62 930 87.54 87.75 87.58 928 87.38 87.53 87.40 926 87.45 87.87 87.23 924 87.79 86.80 87.41 922 87.14 87.31 87.50 920 87.18 86.95 87.20 918 87.20 86.86 87.17 916 86.93 86.85 86.63 914 86.96 86.97 86.95 912 86.77 86.58 86.75 910 86.90 86.31 85.96 908 86.48 86.50 86.18 906 86.20 86.24 85.91 904 86.16 85.98 86.16 902 86.22 86.21 85.95 900 85.94 85.89 86.04 898 85.96 85.10 85.62 896 85.51 85.24 85.21 894 85.73 85.44 85.34 892 85.35 85.01 85.12 890 85.10 85.19 84.98 888 85.01 85.08 85.20 886 85.16 84.82 85.13 884 84.70 84.77 84.50 882 84.43 84.34 84.26 880 84.63 84.36 84.20 878 84.70 83.96 84.34 876 84.30 84.33 83.96 874 83.99 83.90 84.01 872 83.87 83.70 83.95 870 83.76 84.09 83.71 868 83.61 83.95 83.53 866 83.83 83.12 83.35 864 83.41 82.96 83.18 862 83.04 83.04 82.92 860 83.05 82.83 82.82 858 82.98 82.70 82.77 856 83.10 82.51 82.51 854 82.69 82.60 82.97 852 82.68 82.64 82.46 850 82.37 82.08 82.28 848 82.46 82.23 81.95 846 82.21 81.92 81.73 844 82.26 82.09 81.76 842 81.97 81.60 81.99 840 81.99 81.70 81.84 838 82.04 81.67 81.70 836 81.92 81.68 81.81 834 81.94 81.59 81.49 832 81.94 81.49 81.58 830 81.79 81.47 81.65 828 82.04 81.72 81.51 826 81.83 81.49 81.66 824 81.60 81.12 81.65 822 81.71 81.72 81.40 820 81.59 81.51 81.69 818 81.52 81.35 81.52 816 81.49 81.23 81.51 814 81.87 81.53 81.20 812 81.79 81.44 81.54 810 81.84 81.64 81.45 808 81.52 81.58 81.87 806 81.66 81.79 81.58 804 81.83 81.77 81.96 802 81.70 81.66 81.83 800 81.96 81.64 81.82 798 82.03 81.71 81.70 796 82.15 81.85 82.08 794 82.32 81.80 82.17 792 82.42 81.79 81.99 790 82.38 81.79 82.12 788 82.19 82.07 82.04 786 82.32 82.06 82.54 784 82.54 82.23 82.10 782 82.49 82.24 82.36 780 82.75 82.26 82.47 778 82.72 82.62 82.74 776 82.70 82.78 82.45 774 82.81 82.56 82.73 772 83.15 82.61 82.58 770 82.67 82.96 82.66 768 82.98 82.89 82.83 766 82.87 83.17 82.84 764 83.03 82.98 82.90 762 83.04 83.12 83.36 760 83.24 82.97 83.02 758 83.55 82.94 83.43 756 83.53 83.49 83.36 754 83.30 83.17 83.24 752 83.34 83.11 83.34 750 83.59 83.39 83.54 748 83.49 83.54 83.72 746 83.69 83.54 83.63 744 83.66 83.59 83.75 742 83.90 83.34 83.78 740 83.76 83.46 83.75 738 83.91 83.70 83.74 736 83.80 83.62 84.04 734 83.96 83.79 83.95 732 84.05 83.81 83.82 730 83.85 83.71 83.80 728 84.00 84.01 83.89 726 84.10 83.86 83.87 724 84.03 84.23 83.92 722 84.38 84.17 84.26 720 84.31 84.24 84.23 718 84.03 84.12 84.39 716 84.29 84.14 84.24 714 84.47 84.28 84.30 712 84.15 84.41 84.20 710 84.34 84.17 84.38 708 84.35 84.33 84.41 706 84.40 84.51 84.29 704 84.52 84.52 84.63 702 84.89 84.54 84.61 700 84.84 84.39 84.57 698 84.67 84.33 84.71 696 84.59 84.61 84.62 694 84.81 84.28 84.79 692 84.46 84.55 84.61 690 84.72 84.51 84.72 688 84.67 84.73 84.55 686 84.87 84.51 84.78 684 84.79 84.57 84.74 682 84.80 84.57 84.82 680 84.91 84.83 84.89 678 84.81 84.58 84.96 676 84.92 84.80 84.75 674 84.84 84.91 84.80 672 85.11 84.79 84.88 670 85.02 84.87 84.89 668 84.93 84.74 84.82 666 84.95 84.88 84.93 664 84.98 84.86 85.07 662 85.07 84.87 84.88 660 85.08 85.02 84.86 658 85.35 84.82 85.04 656 85.17 85.06 84.82 654 85.09 84.91 85.11 652 85.24 84.96 85.04 650 85.09 85.17 85.12 648 84.95 85.06 85.17 646 85.10 85.09 85.08 644 85.06 85.08 85.12 642 85.03 85.03 84.99 640 85.04 85.07 85.24 638 85.05 85.08 85.18 636 85.13 85.05 85.19 634 85.04 85.09 85.19 632 85.09 85.13 85.01 630 85.24 85.04 85.37 628 85.21 85.44 85.17 626 85.04 85.15 85.10 624 85.08 85.32 85.09 622 85.11 85.13 85.33 620 85.18 85.19 85.26 618 85.37 85.16 85.36 616 85.36 85.38 85.41 614 85.24 85.09 85.31 612 85.27 85.04 85.25 610 85.30 85.24 85.15 608 85.24 85.38 85.19 606 85.33 85.12 85.36 604 85.23 85.13 85.18 602 85.42 85.35 85.47 600 85.24 85.08 85.21 598 85.29 85.04 85.16 596 85.13 85.21 85.33 594 85.02 85.13 85.36 592 85.21 85.11 85.40 590 85.23 85.33 85.44 588 85.03 85.27 85.40 586 85.27 85.13 85.15 584 85.33 85.12 85.37 582 85.26 85.21 85.48 580 85.21 85.36 85.26 578 85.16 85.28 85.30 576 85.15 85.21 85.46 574 85.17 85.21 85.19 572 85.30 85.13 85.34 570 85.20 85.38 85.28 568 85.04 85.27 85.36 566 85.19 85.02 85.40 564 85.17 85.25 85.27 562 85.26 85.19 85.28 560 85.25 85.35 85.17 558 85.21 85.06 85.35 556 85.23 84.96 85.19 554 85.05 85.16 85.36 552 85.22 85.07 85.19 550 85.16 85.20 85.23 548 84.97 85.13 85.33 546 84.98 85.06 85.26 544 85.23 85.04 85.29 542 85.22 85.18 85.09 540 85.05 85.16 85.35 538 85.24 85.05 85.05 536 85.11 85.01 85.23 534 85.08 85.18 85.23 532 85.17 85.16 85.25 530 84.82 85.00 85.14 528 84.84 84.91 85.08 526 84.94 84.98 85.07 524 84.91 84.94 85.19 522 84.77 84.82 85.12 520 84.68 84.91 84.89 518 84.93 84.93 84.90 516 85.13 85.01 85.11 514 84.79 84.85 85.06 512 84.97 84.97 84.93 510 84.88 84.90 85.01 508 84.60 85.04 84.71 506 84.74 84.93 85.00 504 84.70 84.64 84.96 502 84.83 84.78 84.88 500 84.68 84.91 85.00 498 84.69 84.77 84.81 496 84.51 84.88 84.87 494 84.66 84.90 84.92 492 84.69 84.88 84.80 490 84.85 84.67 84.95 488 84.73 84.79 84.92 486 84.67 84.68 84.83 484 84.62 84.68 84.88 482 84.68 84.73 84.62 480 84.47 84.86 84.89 478 84.45 84.54 84.77 476 84.36 84.69 84.89 474 84.41 84.61 84.92 472 84.26 84.48 84.76 470 84.43 84.48 84.74 468 84.30 84.67 84.71 466 84.27 84.67 84.80 464 84.13 84.55 84.77 462 84.41 84.23 84.60 460 84.42 84.63 84.59 458 83.99 84.43 84.36 456 84.43 84.35 84.68 454 84.16 84.37 84.30 452 84.03 84.65 84.59 450 84.14 84.47 84.56 448 84.00 84.46 84.45 446 83.69 84.34 84.79 444 84.04 84.24 84.30 442 83.86 84.35 84.40 440 84.07 84.41 84.36 438 83.56 84.17 84.19 436 83.33 83.64 83.75 434 83.65 84.20 84.50 432 84.01 84.11 84.29 430 83.63 84.17 83.98 428 83.71 84.10 84.47 426 83.27 83.81 84.28 424 83.67 83.97 84.30 422 83.70 84.33 84.15 420 83.39 83.93 83.96 418 83.23 84.28 83.79 416 83.53 83.57 84.19 414 83.33 84.18 84.10 412 83.58 83.72 83.73 410 83.31 83.66 84.38 408 82.99 83.87 83.87 406 82.75 84.21 83.37 404 82.72 83.56 83.75 402 82.84 83.99 84.09 400 83.02 83.49 83.72 398 82.98 83.60 83.92 396 82.91 83.26 83.45 394 82.84 83.23 83.90 392 82.68 82.89 83.64 390 82.44 83.82 83.59 388 82.65 83.66 83.92 386 82.16 83.63 83.08 384 82.82 83.20 83.55 382 82.75 82.94 83.33 380 83.45 83.14 83.20 1650 95.23 95.09 95.08 1640 95.23 95.09 95.10 1630 95.23 95.10 95.09 1620 95.23 95.10 95.10 1610 95.23 95.10 95.09 1600 95.23 95.09 95.10 1590 95.22 95.08 95.08 1580 95.20 95.07 95.06 1570 95.20 95.05 95.06 1560 95.18 95.04 95.03 1550 95.15 95.02 95.03 1540 95.13 95.00 95.00 1530 95.13 94.99 94.99 1520 95.11 94.97 94.96 1510 95.09 94.94 94.94 1500 95.07 94.92 94.93 1490 95.04 94.91 94.90 1480 95.03 94.87 94.87 1470 94.99 94.85 94.85 1460 94.97 94.82 94.82 1450 94.93 94.79 94.79 1440 94.91 94.77 94.75 1430 94.88 94.73 94.73 1420 94.85 94.71 94.71 1410 94.82 94.68 94.68 1400 94.80 94.65 94.65 1390 94.77 94.62 94.61 1380 94.73 94.58 94.58 1370 94.67 94.52 94.51 1360 94.62 94.48 94.47 1350 94.59 94.43 94.43 1340 94.56 94.40 94.39 1330 94.51 94.36 94.36 1320 94.47 94.32 94.32 1310 94.43 94.28 94.28 1300 94.40 94.23 94.24 1290 94.35 94.19 94.19 1280 94.31 94.15 94.14 1270 94.26 94.10 94.10 1260 94.21 94.06 94.05 1250 94.16 94.00 94.00 1240 94.10 93.94 93.94 1230 94.05 93.88 93.88 1220 93.99 93.83 93.84 1210 93.93 93.76 93.77 1200 93.86 93.70 93.70 1190 93.78 93.63 93.62 1180 93.71 93.54 93.55 1170 93.63 93.47 93.47 1160 93.56 93.39 93.40 1150 93.49 93.31 93.31 1140 93.39 93.21 93.24 1130 93.29 93.12 93.13 1120 93.19 93.01 93.02 1110 93.08 92.90 92.91 1100 92.95 92.79 92.79 1090 92.83 92.65 92.67 1080 92.69 92.51 92.52 1070 92.54 92.36 92.37 1060 92.38 92.20 92.21 1050 92.20 92.03 92.03 1040 92.01 91.83 91.84 1030 91.80 91.63 91.64 1020 91.58 91.40 91.42 1010 91.34 91.16 91.18 1000 91.06 90.88 90.91 990 90.77 90.59 90.61 980 90.44 90.26 90.28 970 90.09 89.90 89.93 960 89.68 89.51 89.52 950 89.24 89.06 89.08