# 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 2020-02-19 (852 days after) # Measured five 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 Pos.3 #4 Pos.3 #5 1000 88.24 88.42 89.56 88.11 88.66 998 88.17 87.82 88.19 88.28 89.14 996 87.97 87.99 88.14 87.98 88.61 994 88.01 88.07 88.03 89.01 88.44 992 87.77 88.41 87.93 88.39 88.37 990 88.95 88.53 88.36 88.30 87.98 988 87.70 89.05 88.86 88.72 87.68 986 87.75 88.84 88.09 88.36 88.14 984 88.54 88.27 87.78 87.93 88.78 982 87.76 88.08 87.78 88.68 88.57 980 86.93 88.08 88.11 89.07 88.25 978 88.08 88.48 87.76 87.65 88.83 976 87.52 88.76 87.75 88.15 88.84 974 87.55 88.36 87.41 87.65 88.25 972 87.74 87.03 86.98 88.13 87.72 970 87.98 87.67 88.13 88.14 88.64 968 86.79 87.50 87.42 87.79 87.70 966 87.71 88.09 87.64 87.17 87.78 964 87.42 88.13 87.95 87.91 87.21 962 86.91 87.87 87.71 87.88 87.16 960 86.92 87.61 87.12 88.39 87.59 958 87.15 87.08 87.39 87.50 87.69 956 86.05 87.68 87.17 87.44 87.31 954 86.93 87.02 87.25 87.66 87.50 952 86.90 86.64 87.60 87.38 87.07 950 87.22 87.63 87.29 86.89 87.56 948 86.43 87.34 87.41 87.34 87.17 946 86.27 87.21 86.83 86.94 87.15 944 86.80 87.15 86.68 86.65 86.93 942 86.62 86.77 86.39 86.97 86.70 940 86.24 86.68 86.49 86.68 86.79 938 86.17 86.30 86.44 86.84 86.73 936 85.84 86.54 86.54 86.46 86.90 934 86.15 86.07 86.60 86.31 86.15 932 85.74 86.21 86.14 86.15 86.11 930 85.72 86.22 86.30 86.50 86.40 928 86.03 85.95 85.80 86.14 85.90 926 85.38 85.94 85.83 85.75 86.00 924 85.40 86.04 85.63 85.52 85.59 922 85.26 85.60 85.66 85.73 85.84 920 85.33 85.80 85.50 85.88 85.72 918 85.17 85.61 85.27 85.57 85.47 916 85.41 85.95 85.20 85.59 85.68 914 85.32 85.11 85.14 85.38 85.16 912 84.87 85.37 85.26 85.04 85.34 910 84.66 85.41 84.41 85.09 85.20 908 84.89 85.24 85.29 85.04 84.73 906 84.34 84.28 84.79 84.79 84.87 904 84.27 84.58 84.11 84.67 84.53 902 84.11 84.58 84.25 84.75 84.61 900 83.79 84.33 84.47 84.70 84.21 898 83.68 84.08 84.27 83.97 84.26 896 84.00 84.45 83.74 84.39 84.05 894 83.58 83.67 83.97 84.07 83.72 892 83.54 83.73 83.67 84.04 84.02 890 83.07 83.72 83.33 83.59 83.71 888 82.96 83.74 83.21 83.64 83.36 886 82.72 83.52 82.83 83.66 83.26 884 82.77 83.59 82.75 83.37 83.16 882 82.58 83.23 82.79 83.13 83.46 880 82.54 82.89 82.30 83.45 83.10 878 82.21 82.86 82.47 82.72 82.85 876 81.76 83.22 82.52 82.78 82.50 874 82.04 82.75 81.71 82.45 82.37 872 81.82 82.08 82.18 82.37 82.63 870 81.69 82.17 81.77 82.44 82.15 868 81.66 81.88 81.91 82.13 81.84 866 81.33 81.65 81.82 81.76 81.73 864 80.92 81.77 81.63 81.97 81.41 862 81.19 81.76 81.17 81.67 81.62 860 81.07 81.21 81.35 81.12 81.43 858 80.85 81.55 81.26 81.26 81.37 856 80.74 81.19 81.07 81.18 81.18 854 80.80 81.00 80.95 81.23 80.90 852 80.26 81.00 80.53 81.34 81.08 850 80.44 80.89 80.39 80.92 80.85 848 80.41 81.17 80.31 80.71 80.99 846 80.08 80.66 80.29 80.68 80.84 844 80.28 80.50 80.16 80.49 80.58 842 79.98 80.61 80.38 80.36 80.64 840 79.79 80.36 80.18 80.28 80.32 838 79.84 80.02 79.82 80.42 80.22 836 79.99 80.34 79.92 80.45 80.24 834 80.03 80.26 80.31 80.07 80.15 832 79.84 80.34 80.06 80.42 80.07 830 80.01 79.68 80.26 80.39 79.78 828 79.53 80.34 79.84 79.99 80.15 826 79.63 80.03 79.53 80.20 80.21 824 79.60 80.10 79.44 80.06 80.16 822 79.45 79.88 79.93 80.14 80.19 820 79.90 80.27 79.61 80.43 80.30 818 79.45 80.27 79.87 80.19 80.32 816 79.59 80.02 79.66 80.39 79.77 814 79.70 80.10 79.96 80.16 80.13 812 79.64 80.32 79.81 80.18 80.39 810 79.72 80.38 79.80 80.37 80.13 808 79.62 79.85 79.96 80.03 79.88 806 79.80 80.38 79.84 80.36 80.36 804 79.78 80.47 79.80 80.54 80.35 802 79.73 80.60 80.21 80.44 80.36 800 80.02 80.32 80.03 80.42 80.62 798 80.02 80.60 80.11 80.70 80.59 796 79.80 80.50 80.15 80.40 80.05 794 79.69 80.43 79.99 80.71 80.84 792 80.04 80.77 80.25 80.50 80.32 790 80.32 80.79 80.39 80.45 80.81 788 80.36 80.99 80.28 80.80 80.78 786 80.47 80.75 80.56 80.86 80.89 784 80.68 80.94 80.33 80.90 81.08 782 80.54 80.96 80.49 80.69 80.89 780 80.27 81.23 80.98 81.21 80.97 778 80.69 81.32 80.58 81.25 80.93 776 80.75 80.96 80.77 81.08 81.12 774 80.71 81.05 81.11 81.37 81.14 772 80.72 81.39 81.09 81.53 81.13 770 80.83 81.32 80.91 81.58 81.35 768 81.12 81.24 81.07 81.34 81.55 766 81.24 81.58 81.08 81.64 81.50 764 80.94 81.63 81.25 81.75 81.36 762 81.32 81.52 81.40 81.70 81.63 760 81.41 81.66 81.19 81.81 81.88 758 80.96 81.82 81.24 81.93 81.68 756 81.20 81.85 81.47 81.80 81.84 754 81.23 81.77 81.68 81.88 81.94 752 81.50 81.72 81.44 81.99 81.91 750 81.61 82.06 81.50 82.21 82.09 748 81.62 82.00 81.66 82.15 82.05 746 81.56 82.20 81.75 82.05 82.04 744 81.57 82.24 81.98 82.27 82.18 742 81.36 82.39 81.90 82.26 82.23 740 81.58 82.42 81.73 82.33 82.14 738 81.93 82.26 81.87 82.42 82.22 736 81.79 82.35 82.06 82.41 82.16 734 81.73 82.56 82.21 82.41 82.45 732 82.17 82.25 82.29 82.47 82.21 730 82.21 82.45 82.07 82.80 82.52 728 82.02 82.48 82.24 82.58 82.48 726 81.91 82.51 82.14 82.63 82.55 724 82.09 82.70 82.45 82.89 82.72 722 82.22 82.66 82.28 82.75 82.75 720 82.20 82.61 82.22 82.80 82.64 718 82.01 82.76 82.19 82.68 82.75 716 82.29 82.72 82.16 82.91 82.67 714 82.32 82.57 82.48 82.71 82.80 712 82.38 82.77 82.51 82.99 82.93 710 82.30 82.74 82.53 83.10 82.80 708 82.32 82.88 82.57 83.04 82.93 706 82.58 82.93 82.49 83.04 82.90 704 82.31 82.88 82.39 82.81 82.78 702 82.49 82.96 82.97 83.08 82.86 700 82.49 82.98 82.64 83.14 82.97 698 82.64 82.99 82.81 83.17 83.02 696 82.59 83.14 82.80 83.14 82.79 694 82.77 82.95 82.69 83.14 83.05 692 82.75 83.20 82.68 83.26 83.10 690 82.60 83.19 82.63 83.31 82.80 688 82.72 83.16 82.94 83.22 83.08 686 82.60 82.87 82.77 83.54 83.19 684 82.63 83.17 82.92 83.32 83.21 682 82.75 83.17 82.73 83.17 83.35 680 82.59 83.08 82.76 83.45 83.27 678 82.74 83.41 82.65 83.36 83.25 676 82.81 83.07 83.04 83.52 83.30 674 82.91 83.12 83.01 83.56 83.28 672 82.93 83.24 82.98 83.50 83.28 670 82.89 83.39 82.94 83.61 83.30 668 83.04 83.16 83.03 83.64 83.27 666 82.81 83.34 83.13 83.51 83.40 664 82.66 83.30 83.05 83.78 83.36 662 83.04 83.43 83.04 83.55 83.20 660 82.83 83.50 83.19 83.64 83.43 658 82.89 83.51 82.85 83.39 83.40 656 82.93 83.39 83.03 83.69 83.50 654 82.88 83.46 83.08 83.67 83.62 652 83.01 83.40 83.11 83.60 83.41 650 83.12 83.46 83.18 83.64 83.67 648 83.18 83.56 83.06 83.76 83.48 646 83.16 83.73 83.15 83.68 83.39 644 83.00 83.49 83.16 83.75 83.62 642 82.92 83.50 83.23 83.76 83.50 640 82.92 83.60 83.15 83.78 83.49 638 83.01 83.68 83.40 83.65 83.67 636 83.06 83.52 83.33 83.65 83.55 634 83.24 83.75 83.27 83.73 83.72 632 83.08 83.53 83.17 83.90 83.57 630 83.11 83.68 83.29 83.93 83.46 628 83.15 83.56 83.23 83.77 83.50 626 83.24 83.73 83.18 83.79 83.73 624 83.17 83.63 83.27 83.75 83.67 622 83.04 83.69 83.41 83.74 83.62 620 83.40 83.60 83.14 84.01 83.67 618 83.19 83.63 83.43 83.85 83.62 616 83.13 83.74 83.12 83.73 83.78 614 83.10 83.84 83.44 83.81 83.70 612 83.17 83.73 83.28 83.75 83.59 610 83.11 83.73 83.24 83.94 83.52 608 83.20 83.78 83.26 83.85 83.61 606 83.42 83.54 83.52 83.86 83.56 604 83.24 83.72 83.36 83.97 83.56 602 82.96 83.62 83.27 84.04 83.69 600 83.18 83.69 83.33 83.94 83.76 598 83.26 83.84 83.37 83.74 83.63 596 83.11 83.71 83.36 83.94 83.52 594 83.12 83.67 83.32 83.99 83.79 592 83.08 83.67 83.44 83.84 83.61 590 83.19 83.77 83.34 83.93 83.65 588 83.28 83.78 83.55 83.83 83.63 586 82.90 83.82 83.36 84.12 83.59 584 83.42 83.53 83.38 83.93 83.61 582 83.29 83.73 83.48 83.95 83.85 580 83.31 83.62 83.34 83.94 83.75 578 83.15 83.63 83.31 83.91 83.55 576 83.05 83.68 83.31 83.76 83.71 574 83.17 83.69 83.41 83.97 83.72 572 83.43 83.74 83.46 83.88 83.62 570 83.33 83.67 83.33 83.94 83.75 568 83.29 83.69 83.30 83.79 83.62 566 83.26 83.76 83.32 83.90 83.63 564 83.29 83.69 83.31 83.77 83.61 562 83.28 83.58 83.47 83.92 83.77 560 83.17 83.43 83.33 83.86 83.66 558 83.13 83.56 83.14 83.96 83.58 556 83.14 83.49 83.16 83.93 83.64 554 83.31 83.71 83.28 83.92 83.72 552 83.30 83.65 83.37 83.92 83.55 550 83.26 83.66 83.28 83.77 83.64 548 83.00 83.66 83.18 83.76 83.62 546 82.98 83.54 83.29 83.84 83.40 544 83.21 83.37 83.23 83.82 83.66 542 83.21 83.59 83.18 84.05 83.54 540 83.14 83.49 83.26 83.70 83.33 538 83.31 83.53 83.26 83.78 83.64 536 83.23 83.54 83.15 83.78 83.52 534 83.08 83.54 83.37 83.72 83.43 532 83.16 83.57 83.22 83.88 83.45 530 83.19 83.52 83.26 83.64 83.44 528 83.16 83.62 83.31 83.68 83.51 526 83.00 83.43 83.47 83.64 83.58 524 83.07 83.44 83.45 83.73 83.26 522 83.17 83.33 83.27 83.73 83.52 520 83.10 83.38 83.27 83.95 83.56 518 83.04 83.40 83.26 83.79 83.39 516 83.19 83.38 83.16 83.69 83.37 514 83.14 83.53 83.11 83.54 83.43 512 83.05 83.48 83.31 83.67 83.42 510 82.88 83.38 83.12 83.50 83.25 508 82.97 83.28 82.92 83.57 83.57 506 83.00 83.24 83.14 83.53 83.09 504 83.10 83.13 83.07 83.65 83.18 502 83.09 83.26 83.15 83.48 83.51 500 82.93 83.41 83.08 83.48 83.23 498 82.96 83.16 82.98 83.34 83.30 496 82.88 83.22 82.82 83.49 83.18 494 82.92 83.04 83.24 83.24 82.94 492 82.73 83.31 83.25 83.65 83.36 490 82.95 83.43 83.13 83.60 83.14 488 82.89 83.06 82.97 83.43 83.03 486 82.72 83.10 82.86 83.37 82.98 484 82.66 83.12 82.95 83.47 82.89 482 82.78 83.17 82.62 83.31 83.03 480 82.86 82.89 82.86 83.19 83.05 478 82.71 82.93 83.08 83.31 83.04 476 82.60 83.04 82.93 83.43 82.93 474 82.60 83.06 82.73 82.93 82.86 472 82.55 82.93 82.91 83.36 83.23 470 82.76 83.05 82.82 83.04 83.09 468 82.54 83.12 83.00 82.96 82.94 466 82.80 82.95 82.77 83.48 83.05 464 82.52 82.83 83.17 83.08 82.85 462 82.47 82.76 82.50 83.08 82.65 460 82.46 82.75 82.56 83.34 82.89 458 82.35 82.95 82.80 82.98 82.91 456 82.37 82.78 82.77 82.93 82.71 454 82.06 82.67 82.63 83.16 82.42 452 82.32 82.71 82.64 83.01 82.74 450 82.45 82.57 82.73 83.04 83.19 448 82.30 82.35 82.59 83.11 82.80 446 82.24 82.68 82.44 82.91 82.56 444 82.33 82.63 82.34 82.89 83.04 442 82.38 82.40 82.69 82.89 82.55 440 82.12 82.97 82.48 82.56 82.29 438 81.93 82.33 82.36 82.83 82.56 436 82.06 82.49 82.48 82.59 82.08 434 82.38 82.64 82.25 82.75 82.56 432 82.14 82.61 82.53 82.95 82.46 430 82.20 82.42 82.34 82.64 82.26 428 82.09 82.64 82.19 82.95 82.89 426 81.61 82.46 82.39 82.91 82.26 424 82.06 82.82 82.46 82.55 82.22 422 81.55 82.39 82.31 83.15 82.03 420 82.00 81.93 82.56 82.77 82.36 418 81.97 82.20 82.16 82.36 82.36 416 82.13 82.36 82.48 82.19 82.49 414 81.84 82.25 82.34 82.57 82.42 412 81.67 82.62 82.37 82.38 82.07 410 81.68 81.65 82.51 81.73 81.95 408 81.93 82.37 81.97 81.86 82.40 406 81.48 82.51 82.02 81.98 81.97 404 81.80 81.98 81.66 82.25 81.61 402 82.08 82.04 82.30 81.91 81.76 400 81.81 81.86 82.12 82.05 81.74 398 81.31 82.44 82.74 81.96 81.30 396 81.77 81.68 81.94 81.55 82.09 394 80.98 81.75 81.59 81.74 82.20 392 82.08 81.61 81.68 82.23 81.48 390 81.56 81.77 81.36 81.85 81.64 388 80.88 81.99 81.73 81.63 81.70 386 81.22 81.74 80.96 82.54 82.30 384 80.78 81.20 81.46 82.19 81.83 382 81.51 81.40 81.89 81.95 81.26 380 81.63 82.02 81.34 80.81 81.44 1650 93.23 93.62 93.47 93.84 93.60 1640 93.23 93.63 93.48 93.84 93.60 1630 93.24 93.63 93.48 93.85 93.60 1620 93.23 93.63 93.48 93.84 93.61 1610 93.23 93.62 93.48 93.84 93.61 1600 93.22 93.63 93.47 93.83 93.60 1590 93.21 93.61 93.45 93.82 93.58 1580 93.19 93.60 93.44 93.80 93.57 1570 93.18 93.58 93.43 93.78 93.55 1560 93.17 93.57 93.42 93.77 93.54 1550 93.15 93.54 93.39 93.75 93.53 1540 93.13 93.53 93.37 93.73 93.50 1530 93.11 93.50 93.35 93.71 93.48 1520 93.09 93.49 93.33 93.69 93.45 1510 93.07 93.47 93.31 93.66 93.44 1500 93.04 93.45 93.28 93.64 93.41 1490 93.01 93.42 93.25 93.60 93.38 1480 92.99 93.39 93.23 93.58 93.35 1470 92.96 93.36 93.20 93.55 93.32 1460 92.93 93.34 93.17 93.52 93.29 1450 92.90 93.31 93.13 93.49 93.26 1440 92.87 93.27 93.11 93.46 93.24 1430 92.83 93.25 93.07 93.43 93.20 1420 92.80 93.22 93.04 93.40 93.17 1410 92.78 93.19 93.02 93.37 93.14 1400 92.74 93.16 92.98 93.34 93.11 1390 92.72 93.13 92.96 93.31 93.07 1380 92.68 93.09 92.91 93.27 93.04 1370 92.61 93.02 92.85 93.19 92.98 1360 92.56 92.98 92.81 93.15 92.93 1350 92.52 92.95 92.76 93.12 92.89 1340 92.49 92.91 92.73 93.08 92.86 1330 92.45 92.87 92.68 93.04 92.81 1320 92.40 92.83 92.64 93.01 92.78 1310 92.36 92.79 92.60 92.96 92.74 1300 92.32 92.75 92.56 92.92 92.69 1290 92.28 92.71 92.52 92.87 92.65 1280 92.23 92.66 92.47 92.83 92.61 1270 92.19 92.61 92.43 92.79 92.57 1260 92.13 92.57 92.37 92.74 92.52 1250 92.09 92.52 92.33 92.68 92.47 1240 92.03 92.46 92.27 92.63 92.41 1230 91.99 92.41 92.22 92.58 92.36 1220 91.92 92.35 92.16 92.52 92.30 1210 91.86 92.29 92.10 92.45 92.24 1200 91.79 92.22 92.03 92.39 92.17 1190 91.72 92.15 91.96 92.31 92.10 1180 91.63 92.07 91.87 92.23 92.02 1170 91.56 92.00 91.79 92.16 91.95 1160 91.48 91.92 91.72 92.08 91.87 1150 91.41 91.85 91.65 92.00 91.79 1140 91.32 91.75 91.55 91.91 91.70 1130 91.22 91.65 91.45 91.82 91.60 1120 91.10 91.55 91.34 91.70 91.49 1110 90.99 91.43 91.23 91.59 91.39 1100 90.87 91.31 91.11 91.48 91.27 1090 90.74 91.19 90.98 91.34 91.14 1080 90.60 91.05 90.83 91.20 91.00 1070 90.45 90.89 90.68 91.05 90.85 1060 90.29 90.74 90.52 90.89 90.69 1050 90.11 90.56 90.34 90.71 90.50 1040 89.91 90.37 90.14 90.52 90.32 1030 89.71 90.17 89.94 90.32 90.12 1020 89.48 89.94 89.71 90.09 89.90 1010 89.24 89.70 89.46 89.85 89.65 1000 88.97 89.43 89.19 89.58 89.38 990 88.67 89.14 88.89 89.29 89.09 980 88.34 88.81 88.56 88.96 88.77 970 88.00 88.45 88.20 88.60 88.41 960 87.60 88.05 87.80 88.21 88.00 950 87.16 87.60 87.37 87.77 87.58