# Subaru Telescope Primary Mirror In-Situ Measured Reflectivity # Coated with Aluminum on 2017-10-20 # Measured with Subaru Portable Spectrophotometer (SPS) on 2017-10-23 (After 8th Recoating) # Measured three times at around the position 1 and two times each at around the position 2 and 3 # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) Pos.1 #1 Pos.1 #2 Pos.1 #3 Pos.2 #1 Pos.2 #2 Pos.3 #1 Pos.3 #2 1000 92.22 93.44 93.77 92.55 93.30 93.26 92.57 998 92.83 93.24 92.94 93.05 94.02 93.07 94.31 996 92.90 93.29 92.99 93.25 94.00 93.64 93.45 994 93.27 93.07 93.36 93.22 93.19 92.68 93.13 992 92.63 93.54 93.29 93.73 92.19 93.23 93.47 990 92.97 92.74 93.64 93.42 92.85 94.24 93.01 988 92.87 93.10 92.73 93.85 93.01 93.51 93.78 986 92.55 93.54 92.98 93.16 93.44 93.51 93.65 984 92.56 93.04 93.44 93.15 93.48 93.20 93.47 982 92.95 92.80 93.01 92.27 92.65 93.28 92.65 980 92.81 92.85 93.66 93.20 93.01 93.04 93.11 978 91.89 93.28 92.92 92.69 92.87 92.85 92.81 976 92.56 92.43 93.07 92.83 92.58 92.83 93.14 974 93.01 92.30 93.41 92.99 92.57 93.09 93.45 972 92.38 92.91 92.92 93.05 92.74 93.15 92.24 970 92.55 92.38 92.62 93.03 92.81 92.51 93.23 968 93.06 92.57 93.04 92.89 92.94 92.50 92.97 966 93.20 92.69 92.07 92.85 92.23 92.60 92.58 964 92.66 91.96 92.42 92.60 93.14 92.63 92.75 962 92.41 92.42 92.79 92.25 92.26 92.40 92.83 960 91.93 92.11 92.24 92.47 92.32 92.51 92.11 958 92.08 91.63 92.80 92.43 92.34 92.74 92.03 956 92.56 91.83 92.02 92.32 91.62 92.42 92.06 954 92.02 92.21 92.34 92.32 92.22 92.06 92.28 952 91.79 92.03 92.33 92.07 92.27 92.22 92.21 950 91.69 91.86 91.95 92.10 92.07 92.13 91.89 948 91.53 92.07 91.76 92.03 91.95 91.87 91.78 946 91.84 91.45 92.07 92.07 92.02 91.65 92.11 944 91.41 91.41 91.55 91.81 91.38 91.72 91.53 942 91.85 91.33 91.83 92.37 92.00 91.69 91.53 940 91.78 91.52 91.97 91.47 92.12 91.48 91.79 938 91.70 91.59 91.71 91.25 91.69 91.40 91.72 936 91.49 91.59 91.53 91.52 91.83 91.12 91.23 934 91.04 91.66 91.15 91.14 91.19 91.51 91.53 932 91.39 91.45 91.42 91.11 91.17 90.62 91.49 930 91.54 91.08 91.05 90.85 91.19 90.99 91.29 928 91.40 91.37 90.81 90.99 91.17 90.77 91.09 926 90.90 91.39 90.73 91.01 91.17 91.34 91.16 924 90.72 91.14 90.79 91.10 90.67 91.35 90.73 922 90.62 90.67 90.30 90.81 91.05 90.80 90.49 920 90.67 90.78 90.63 90.52 90.96 90.12 90.91 918 90.91 91.00 90.51 90.75 90.60 90.49 90.62 916 90.49 90.38 90.59 90.99 90.67 90.70 90.70 914 90.92 90.18 90.37 90.13 90.86 90.37 90.35 912 90.53 90.12 90.07 90.12 90.16 90.33 90.11 910 89.41 89.68 90.25 90.15 89.86 89.91 90.36 908 89.79 89.78 90.34 90.17 90.28 90.17 90.10 906 89.52 90.10 89.98 89.91 89.54 89.91 90.07 904 89.67 89.84 89.83 89.84 89.40 89.75 89.74 902 89.21 89.80 89.61 89.66 89.60 89.35 89.41 900 89.62 89.75 89.65 89.88 89.45 89.60 89.16 898 89.25 89.29 89.36 89.32 89.21 89.26 89.38 896 89.45 89.36 89.34 89.20 89.36 89.18 89.26 894 89.10 88.94 89.38 89.18 89.02 89.30 89.05 892 89.20 88.89 88.80 89.08 88.93 89.08 88.98 890 88.53 88.81 88.71 89.25 88.96 89.11 88.89 888 88.57 88.97 88.51 88.35 89.17 88.67 88.59 886 88.54 88.37 88.44 88.20 88.86 88.49 88.39 884 88.35 88.36 88.75 88.28 88.58 88.42 88.46 882 88.09 88.28 88.60 88.13 87.99 88.07 88.19 880 87.81 88.12 88.28 87.60 88.19 88.28 88.31 878 87.74 88.29 88.13 88.14 87.91 88.00 87.88 876 88.03 87.85 88.02 87.93 87.78 87.74 87.88 874 87.43 87.48 87.86 87.61 87.86 87.52 87.53 872 87.20 87.64 87.66 87.54 88.10 87.65 87.51 870 87.19 87.33 87.28 87.44 87.38 87.55 87.26 868 87.48 87.29 87.35 87.59 87.70 87.56 87.51 866 87.32 87.14 87.51 87.46 87.34 87.01 87.19 864 86.81 87.02 87.04 86.77 87.27 86.87 86.96 862 86.90 86.61 86.99 86.97 86.80 87.01 86.95 860 86.90 87.01 87.13 86.60 86.53 86.87 86.87 858 86.75 86.74 86.95 86.46 86.91 86.52 86.89 856 86.57 86.56 86.81 86.66 86.51 86.68 86.77 854 86.39 86.41 86.53 86.38 86.29 86.47 86.54 852 86.21 86.56 86.27 86.36 86.34 86.51 86.12 850 86.46 86.43 86.01 86.32 86.33 86.51 86.29 848 86.25 86.39 86.26 86.10 86.47 86.31 86.37 846 85.85 86.09 86.30 86.21 86.14 86.44 86.04 844 85.96 85.89 86.23 86.34 86.27 86.09 86.12 842 85.77 85.71 86.16 85.78 86.27 85.98 85.81 840 85.70 85.89 85.93 85.92 86.17 85.78 85.83 838 85.62 85.59 86.01 85.85 85.83 86.11 86.18 836 85.89 85.65 85.85 85.36 85.77 85.92 85.82 834 85.97 85.52 85.79 85.59 85.66 85.64 85.77 832 85.97 85.50 85.72 85.79 85.88 85.85 85.74 830 85.65 85.65 85.87 85.48 85.96 86.07 85.33 828 85.50 85.38 85.33 85.70 85.94 86.18 85.62 826 85.84 85.62 85.74 85.42 85.63 85.81 85.77 824 85.55 85.60 85.78 85.68 85.53 85.64 85.81 822 85.60 85.72 85.79 85.92 85.66 85.54 85.69 820 85.94 85.51 85.69 85.59 85.57 85.80 85.68 818 85.56 85.64 85.62 85.47 85.82 85.75 85.77 816 85.58 85.51 85.62 85.45 85.79 85.60 85.87 814 85.72 85.62 85.83 85.71 85.61 85.72 85.71 812 85.64 85.94 85.85 85.98 85.86 85.70 85.90 810 85.91 85.65 85.67 85.58 85.69 85.85 85.93 808 85.73 85.70 85.86 85.66 85.83 85.48 86.28 806 85.86 85.72 85.60 85.58 85.95 85.84 85.73 804 86.30 85.84 85.98 85.91 85.76 85.62 85.69 802 85.89 86.07 85.78 85.79 86.29 85.62 85.97 800 85.83 85.78 85.85 85.86 85.96 85.71 85.96 798 85.95 86.22 86.24 86.00 86.04 86.22 85.97 796 86.11 86.10 86.31 86.06 86.26 86.09 86.09 794 85.95 86.07 86.00 86.28 86.25 86.49 86.19 792 86.19 86.07 86.30 86.13 86.28 86.15 86.35 790 86.25 86.42 86.40 86.34 86.27 86.20 86.25 788 86.49 86.51 86.60 86.30 86.39 86.47 86.32 786 86.37 86.38 86.67 86.66 86.27 86.27 86.24 784 86.49 86.55 86.57 86.51 86.58 86.21 86.52 782 86.54 86.63 86.62 86.38 86.71 86.49 86.61 780 86.60 86.46 86.80 86.81 86.58 86.50 86.64 778 86.60 86.80 87.04 86.67 86.66 86.70 86.47 776 86.98 86.93 87.02 86.86 86.69 86.91 86.81 774 87.04 87.01 86.98 86.94 87.18 86.88 86.92 772 86.80 86.89 86.99 86.84 86.92 86.98 87.03 770 86.98 87.05 87.07 87.01 86.92 87.06 87.13 768 87.27 87.15 87.09 87.22 87.17 87.14 87.13 766 86.93 87.21 87.42 87.07 87.27 87.25 87.24 764 86.78 87.26 87.44 87.16 87.45 87.04 87.50 762 87.32 87.18 87.43 87.11 87.22 87.54 87.28 760 87.24 87.32 87.34 87.42 87.32 87.23 87.01 758 87.38 87.35 87.49 87.46 87.59 87.33 87.65 756 87.51 87.41 87.55 87.52 87.62 87.49 87.72 754 87.47 87.47 87.38 87.55 87.58 87.56 87.55 752 87.72 87.68 87.63 87.59 87.82 87.54 87.76 750 87.45 87.52 87.66 87.88 87.67 87.72 87.40 748 87.65 87.74 87.79 87.75 87.80 87.82 87.85 746 87.62 87.62 87.80 87.81 87.75 87.66 87.67 744 87.72 87.78 87.84 87.96 87.96 88.03 87.90 742 87.88 87.88 88.01 87.92 87.97 87.75 87.89 740 87.82 88.03 87.95 87.92 87.92 88.26 87.87 738 88.08 87.93 88.12 87.60 88.23 87.88 87.94 736 88.08 88.11 88.15 88.04 88.07 88.06 87.94 734 88.15 88.06 88.39 88.33 88.24 88.04 88.20 732 88.11 87.95 88.25 88.30 88.44 88.30 88.21 730 88.23 88.10 88.33 88.08 88.52 88.15 88.11 728 88.09 88.28 88.36 88.20 88.25 88.25 88.21 726 88.36 88.21 88.34 88.37 88.33 88.29 88.37 724 88.50 88.35 88.40 88.24 88.46 88.59 88.23 722 88.56 88.49 88.34 88.28 88.45 88.37 88.61 720 88.59 88.49 88.68 88.49 88.61 88.37 88.46 718 88.31 88.72 88.81 88.71 88.51 88.55 88.73 716 88.43 88.49 88.85 88.57 88.63 88.44 88.64 714 88.56 88.48 88.76 88.57 88.59 88.82 88.65 712 88.64 88.73 88.50 88.68 88.91 88.47 88.66 710 88.87 88.76 88.66 88.61 88.69 88.63 88.75 708 88.67 88.58 88.68 88.72 88.76 88.72 88.80 706 88.68 88.57 88.82 88.58 88.87 88.87 88.86 704 88.76 88.76 89.06 88.82 89.13 88.85 88.75 702 88.91 88.87 88.86 88.87 88.89 88.79 88.91 700 88.83 89.13 88.89 88.88 88.96 89.01 88.89 698 89.00 89.09 89.02 88.86 89.00 89.14 88.91 696 89.09 89.08 89.02 89.09 89.38 89.02 88.95 694 89.04 89.01 89.00 89.08 89.09 89.25 88.97 692 89.08 88.99 89.09 89.22 89.19 88.94 88.95 690 89.07 88.93 89.11 89.07 89.11 89.14 88.93 688 89.29 89.19 89.26 89.19 89.15 89.06 89.17 686 89.08 89.14 89.39 89.21 89.17 89.14 89.11 684 89.36 89.15 89.21 89.24 89.16 89.24 89.29 682 89.07 89.09 89.31 89.21 89.40 89.27 89.19 680 89.06 89.23 89.39 89.35 89.23 89.23 89.06 678 89.30 89.38 89.45 89.42 89.34 89.35 89.19 676 89.25 89.40 89.54 89.26 89.50 89.30 89.31 674 89.21 89.35 89.47 89.35 89.18 89.22 89.21 672 89.38 89.46 89.30 89.32 89.44 89.37 89.51 670 89.47 89.36 89.53 89.36 89.44 89.40 89.43 668 89.73 89.43 89.37 89.41 89.43 89.53 89.48 666 89.34 89.33 89.53 89.34 89.73 89.51 89.49 664 89.64 89.63 89.58 89.55 89.48 89.58 89.28 662 89.44 89.55 89.61 89.73 89.66 89.61 89.42 660 89.53 89.50 89.60 89.67 89.69 89.56 89.61 658 89.60 89.73 89.64 89.71 89.81 89.48 89.74 656 89.61 89.75 89.76 89.73 89.65 89.52 89.57 654 89.64 89.72 89.98 89.53 89.84 89.71 89.70 652 89.75 89.92 89.84 89.79 89.91 89.86 89.77 650 89.85 89.72 89.80 89.72 89.91 89.60 89.77 648 89.92 89.82 89.95 89.81 89.86 89.98 89.97 646 90.00 89.96 89.80 89.73 89.82 89.84 89.91 644 89.68 89.82 89.89 89.90 89.74 89.79 89.73 642 89.83 89.87 90.05 89.92 90.09 89.93 89.89 640 89.83 90.08 89.96 89.97 89.99 89.86 90.05 638 89.79 90.07 90.05 89.84 90.11 89.93 89.95 636 89.87 89.98 89.99 89.93 90.00 90.04 89.88 634 89.95 90.07 90.14 90.00 90.19 90.15 89.93 632 90.04 90.09 90.15 90.09 90.27 90.09 90.09 630 90.00 90.13 90.00 89.91 90.15 90.20 89.91 628 90.08 90.13 90.17 89.98 90.06 90.12 90.04 626 90.22 90.04 90.12 90.12 90.21 90.11 90.13 624 90.12 90.08 90.20 90.13 90.20 90.14 89.99 622 90.09 90.16 90.27 90.20 90.15 90.25 90.24 620 90.11 90.16 90.35 90.17 90.45 90.05 90.12 618 90.01 90.27 90.18 90.21 90.30 90.16 90.26 616 90.34 90.14 90.28 90.32 90.31 90.23 90.02 614 90.14 90.36 90.13 90.13 90.40 90.16 90.15 612 90.28 90.25 90.36 90.32 90.43 90.30 90.37 610 90.39 90.35 90.48 90.18 90.51 90.24 90.41 608 90.36 90.41 90.42 90.43 90.42 90.37 90.33 606 90.44 90.28 90.55 90.37 90.51 90.44 90.27 604 90.41 90.50 90.39 90.40 90.53 90.38 90.18 602 90.61 90.38 90.58 90.29 90.65 90.58 90.34 600 90.59 90.62 90.47 90.49 90.65 90.56 90.21 598 90.40 90.51 90.52 90.34 90.50 90.33 90.31 596 90.36 90.58 90.34 90.47 90.47 90.54 90.50 594 90.30 90.74 90.58 90.53 90.76 90.45 90.47 592 90.50 90.58 90.56 90.33 90.67 90.63 90.42 590 90.57 90.59 90.61 90.44 90.55 90.51 90.46 588 90.43 90.67 90.47 90.53 90.52 90.61 90.47 586 90.67 90.62 90.50 90.59 90.58 90.41 90.51 584 90.71 90.55 90.66 90.68 90.65 90.60 90.42 582 90.52 90.51 90.62 90.52 90.69 90.59 90.47 580 90.78 90.58 90.64 90.65 90.84 90.67 90.50 578 90.61 90.61 90.68 90.68 90.67 90.72 90.56 576 90.47 90.89 90.75 90.75 90.78 90.85 90.69 574 90.71 90.66 90.70 90.66 90.72 90.56 90.67 572 90.74 90.76 90.79 90.73 90.60 90.73 90.55 570 90.74 90.80 90.88 90.77 90.68 90.73 90.62 568 90.68 90.63 90.72 90.74 90.94 90.70 90.59 566 90.80 90.82 90.71 90.82 90.74 90.62 90.82 564 90.75 91.03 90.74 90.78 90.89 90.84 90.76 562 90.66 90.82 91.05 90.83 90.98 90.95 90.67 560 90.69 90.82 90.99 90.85 90.85 91.00 90.72 558 90.74 90.81 90.99 90.82 90.94 90.92 90.67 556 90.85 90.83 91.05 90.88 90.94 90.80 90.76 554 90.93 91.10 90.78 90.80 91.02 91.15 90.97 552 90.86 90.76 90.93 90.92 90.79 90.90 91.00 550 90.82 90.97 90.92 90.79 90.93 90.89 90.90 548 91.01 91.03 90.83 91.22 91.15 91.04 90.58 546 90.77 91.00 90.94 91.06 91.04 90.90 91.00 544 90.76 91.04 91.07 90.86 90.95 90.94 91.01 542 91.25 91.01 91.04 91.09 91.04 90.97 90.89 540 91.21 90.92 91.17 90.82 91.06 91.04 90.83 538 91.05 91.01 91.13 91.19 91.29 91.05 90.83 536 90.88 90.89 91.08 90.89 91.37 91.05 91.00 534 90.82 90.99 91.02 91.18 91.07 91.08 90.91 532 90.79 90.97 91.17 91.06 91.20 91.25 90.96 530 90.98 90.95 91.16 91.00 91.18 91.28 91.14 528 91.22 91.18 91.04 91.19 91.20 90.94 90.92 526 90.93 90.92 91.10 91.07 91.06 91.08 91.21 524 91.16 91.13 91.28 91.01 91.27 90.97 91.04 522 91.22 91.28 91.21 90.97 91.32 91.04 91.11 520 91.12 91.14 91.16 91.15 91.26 91.18 91.35 518 91.04 91.19 91.11 91.01 91.37 91.16 91.13 516 91.06 91.16 91.09 91.23 91.17 91.33 91.23 514 91.18 91.13 91.16 91.08 91.12 91.31 91.19 512 91.22 91.14 91.31 91.25 91.28 91.30 91.07 510 91.10 91.26 91.09 91.22 91.24 91.12 91.05 508 91.20 91.40 91.38 91.31 91.29 91.10 91.29 506 91.32 91.08 91.21 91.37 91.22 91.22 91.22 504 91.19 91.42 91.31 91.26 91.19 91.23 91.03 502 91.26 91.42 91.36 91.28 91.42 91.07 91.36 500 91.32 91.29 91.27 91.41 91.55 91.27 91.24 498 91.16 91.33 91.27 91.33 91.41 91.22 91.37 496 91.24 91.56 91.25 91.25 91.57 91.26 91.22 494 91.27 91.31 91.28 91.39 91.46 91.23 91.26 492 91.42 91.33 91.56 91.36 91.45 91.41 91.44 490 91.19 91.24 91.37 91.33 91.35 91.37 91.35 488 91.05 91.10 91.27 91.39 91.46 91.41 91.37 486 91.26 91.40 91.55 91.23 91.38 91.18 91.33 484 91.47 91.32 91.24 91.28 91.41 91.35 91.29 482 91.48 91.23 91.54 91.15 91.48 91.29 91.15 480 91.28 91.25 91.36 91.41 91.57 91.41 91.40 478 91.28 91.32 91.55 91.33 91.39 91.20 91.36 476 91.44 91.35 91.40 91.30 91.55 91.59 91.51 474 91.19 91.46 91.62 91.51 91.33 91.40 91.27 472 91.40 91.30 91.50 91.49 91.58 91.39 91.26 470 91.45 91.67 91.66 91.41 91.12 91.54 91.44 468 91.59 91.54 91.57 91.20 91.31 91.64 91.44 466 91.39 91.24 91.37 91.29 91.45 91.49 91.31 464 91.38 91.26 91.42 91.54 91.58 91.75 91.36 462 91.42 91.50 91.56 91.47 91.67 91.53 91.52 460 91.79 91.29 91.50 91.45 91.34 91.43 91.66 458 91.55 91.71 91.55 91.53 91.50 91.42 91.39 456 91.63 91.57 91.52 91.76 91.49 91.47 91.12 454 91.21 91.63 91.28 91.31 91.57 91.70 91.22 452 91.61 91.86 91.45 91.77 91.50 91.51 91.46 450 91.74 91.70 91.61 91.46 91.55 91.24 91.54 448 91.38 91.54 91.80 91.50 91.74 91.76 91.29 446 91.49 91.52 91.80 91.03 91.85 91.53 91.27 444 91.60 91.74 91.35 91.63 91.49 91.69 91.58 442 91.33 91.20 91.70 91.41 91.34 91.55 91.70 440 91.52 91.70 91.72 91.68 91.56 91.65 91.41 438 91.60 91.54 91.68 91.44 91.42 91.79 91.56 436 91.71 91.91 91.65 91.50 91.88 91.69 91.46 434 91.74 91.53 91.70 91.72 91.79 91.34 91.45 432 91.18 91.70 91.45 91.55 91.22 91.49 91.76 430 91.22 91.69 91.77 91.74 91.64 91.68 91.22 428 91.70 91.52 91.51 91.65 91.57 91.56 91.43 426 91.82 91.76 91.81 91.77 91.58 91.69 91.67 424 91.63 91.53 91.79 91.58 91.99 91.65 91.51 422 91.77 91.24 91.80 91.32 91.81 91.31 91.39 420 91.63 91.67 91.51 91.49 91.60 91.69 91.91 418 91.74 91.71 91.83 91.96 91.71 91.38 91.59 416 91.79 91.63 91.77 91.15 91.89 91.41 91.90 414 92.03 91.42 91.88 91.73 91.89 92.04 91.39 412 91.71 91.53 92.14 91.91 91.78 91.87 91.34 410 91.95 91.67 91.85 91.84 91.55 92.03 91.44 408 91.95 91.07 91.30 91.63 91.90 92.15 91.40 406 91.88 91.72 91.31 91.74 91.74 92.24 91.37 404 91.84 91.88 91.69 92.13 91.76 91.76 91.55 402 92.30 91.44 92.09 91.24 91.74 91.51 91.88 400 91.47 92.25 92.47 91.24 92.44 92.01 91.88 398 91.74 91.69 91.70 91.56 91.94 92.20 91.30 396 91.60 91.28 91.35 92.02 91.21 91.96 91.78 394 91.97 91.83 91.28 91.71 91.46 92.16 92.02 392 92.22 92.45 91.28 91.62 91.66 91.73 91.22 390 91.65 91.47 91.52 91.58 91.49 91.81 91.27 388 91.46 91.77 91.42 91.54 91.82 91.70 91.76 386 91.79 92.09 91.33 91.34 91.75 91.92 91.27 384 92.20 92.05 91.79 90.91 92.20 92.13 92.01 382 91.68 91.80 91.34 91.91 92.31 90.84 91.45 380 92.06 91.56 91.96 92.08 90.70 92.92 91.59