# 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 2018-03-07 (138 days after) # Measured three times at around the position 3 # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) Pos.3 #1 Pos.3 #2 Pos.3 #3 1000 92.64 93.20 93.09 998 93.13 92.48 92.98 996 92.47 92.20 92.35 994 92.12 91.76 92.25 992 92.86 92.97 92.80 990 91.93 92.24 91.84 988 92.50 91.59 92.44 986 92.93 92.78 92.81 984 92.78 92.33 92.37 982 92.34 92.78 91.52 980 92.70 92.38 91.76 978 92.11 92.72 92.50 976 92.10 92.17 92.70 974 91.73 92.82 92.26 972 92.73 92.40 92.78 970 92.64 92.00 91.44 968 92.33 91.72 91.89 966 92.10 91.66 92.03 964 92.13 92.54 92.28 962 91.53 92.08 91.44 960 91.65 92.29 91.33 958 91.92 91.65 92.00 956 91.50 91.37 91.42 954 91.13 91.86 91.58 952 91.82 91.36 91.47 950 91.08 91.50 91.98 948 91.27 91.28 91.52 946 91.20 92.03 90.99 944 91.33 91.02 90.59 942 91.12 90.76 90.97 940 91.20 90.80 90.68 938 91.26 90.72 90.56 936 90.79 91.04 90.99 934 90.76 90.54 90.72 932 90.69 90.46 90.65 930 90.57 90.80 90.14 928 90.34 90.22 90.30 926 90.38 90.54 90.48 924 90.15 90.10 90.15 922 89.84 90.40 90.07 920 90.06 89.80 89.77 918 89.80 89.86 89.68 916 89.63 89.91 89.83 914 89.67 89.91 89.43 912 90.03 89.27 89.83 910 89.44 89.26 89.39 908 89.35 89.21 89.27 906 88.86 89.11 89.39 904 88.86 88.92 88.93 902 88.51 88.92 89.33 900 88.79 88.92 88.92 898 88.75 88.56 88.65 896 88.88 88.39 88.39 894 88.42 88.24 88.34 892 88.18 88.38 87.89 890 88.07 88.30 88.11 888 87.97 87.99 87.93 886 87.36 88.10 87.90 884 87.43 87.48 87.57 882 87.37 87.70 87.52 880 87.46 87.16 87.44 878 87.09 86.79 87.09 876 87.01 87.00 87.35 874 87.05 87.13 86.96 872 86.78 86.86 86.68 870 86.77 86.93 86.72 868 86.67 86.56 86.29 866 86.47 86.48 86.26 864 86.43 86.18 86.27 862 86.24 86.00 86.00 860 85.96 86.03 86.05 858 86.02 85.75 86.05 856 86.03 85.94 85.48 854 85.61 85.78 85.46 852 85.42 85.56 85.44 850 85.44 85.59 85.28 848 85.37 85.21 85.22 846 85.36 85.05 85.20 844 84.89 85.13 85.08 842 84.88 85.15 84.84 840 85.02 85.05 84.98 838 84.72 84.94 84.91 836 84.76 85.10 84.96 834 85.08 85.16 84.74 832 84.50 84.59 84.75 830 84.59 84.75 84.70 828 84.47 84.95 84.94 826 84.51 84.66 84.99 824 84.24 84.99 84.74 822 84.80 84.82 84.62 820 84.63 84.78 84.63 818 84.43 84.61 84.53 816 84.81 84.52 84.72 814 84.55 84.45 84.71 812 84.38 84.46 84.52 810 84.54 85.12 84.66 808 84.57 84.83 84.69 806 85.10 85.02 84.50 804 84.72 85.01 85.10 802 84.90 85.14 84.87 800 85.19 85.07 84.88 798 84.98 85.03 85.20 796 85.16 85.19 85.24 794 85.03 85.32 85.39 792 85.36 85.41 85.26 790 85.33 85.42 85.34 788 85.30 85.79 85.55 786 85.84 85.49 85.55 784 85.52 85.56 85.76 782 85.77 85.96 85.68 780 86.00 85.87 85.82 778 85.69 85.84 86.08 776 85.76 86.14 86.04 774 85.94 85.78 85.90 772 85.85 86.18 86.02 770 86.27 86.20 86.03 768 86.32 86.07 86.17 766 86.23 86.49 86.25 764 86.52 86.50 86.42 762 86.23 86.83 86.43 760 86.57 86.62 86.59 758 86.55 86.60 86.78 756 86.67 87.02 86.58 754 86.74 86.64 86.55 752 86.78 86.59 86.69 750 86.90 86.86 86.98 748 86.78 86.77 86.88 746 87.00 86.92 87.21 744 86.93 86.97 86.98 742 87.08 87.14 87.15 740 87.16 87.31 87.15 738 87.14 87.31 87.35 736 87.38 87.44 87.33 734 87.34 87.28 87.28 732 87.42 87.60 87.43 730 87.40 87.61 87.44 728 87.46 87.71 87.73 726 87.53 87.75 87.53 724 87.68 87.72 87.54 722 87.59 87.68 87.80 720 87.74 87.96 87.97 718 87.86 87.93 87.83 716 87.69 87.97 87.77 714 87.83 88.03 87.90 712 87.94 87.97 88.13 710 88.05 87.87 87.84 708 88.12 87.96 88.00 706 87.98 87.89 87.99 704 88.11 88.09 87.90 702 88.06 88.26 88.32 700 88.18 88.30 88.20 698 87.92 88.33 88.21 696 88.13 88.31 88.20 694 88.16 88.33 88.48 692 88.34 88.26 88.31 690 88.57 88.42 88.53 688 88.21 88.57 88.50 686 88.37 88.47 88.45 684 88.65 88.55 88.44 682 88.59 88.63 88.50 680 88.51 88.61 88.49 678 88.58 88.55 88.71 676 88.60 88.88 88.50 674 88.59 88.76 88.76 672 88.87 88.77 88.96 670 88.74 88.79 88.73 668 88.80 88.89 88.65 666 88.71 88.79 88.73 664 88.96 88.85 88.84 662 88.70 88.97 88.69 660 88.81 88.94 89.01 658 88.88 89.10 89.12 656 88.89 89.19 88.97 654 88.91 89.33 89.00 652 88.98 89.02 89.14 650 89.09 89.20 89.41 648 89.03 89.11 89.22 646 89.26 89.21 89.26 644 89.23 89.39 89.28 642 89.24 89.47 89.22 640 89.28 89.31 89.23 638 89.26 89.35 89.26 636 89.20 89.57 89.21 634 89.24 89.41 89.38 632 89.40 89.49 89.46 630 89.54 89.41 89.40 628 89.55 89.40 89.48 626 89.54 89.63 89.40 624 89.48 89.51 89.53 622 89.47 89.55 89.42 620 89.39 89.65 89.45 618 89.33 89.60 89.48 616 89.51 89.65 89.64 614 89.49 89.81 89.75 612 89.72 89.79 89.54 610 89.52 89.84 89.58 608 89.67 89.87 89.77 606 89.67 89.69 89.71 604 89.69 89.82 89.63 602 89.66 89.83 89.65 600 89.55 89.87 89.66 598 89.85 89.82 89.87 596 89.90 90.00 89.83 594 89.90 89.93 89.87 592 89.80 89.86 89.80 590 89.76 89.88 89.89 588 89.79 89.99 89.85 586 89.93 89.93 89.98 584 89.85 89.91 89.90 582 89.69 89.88 89.96 580 89.85 90.00 89.85 578 90.05 89.97 89.91 576 89.95 90.08 90.03 574 89.80 89.95 89.86 572 89.93 90.12 90.02 570 90.03 90.20 90.11 568 89.86 90.17 90.13 566 90.09 90.19 90.03 564 90.08 89.97 89.86 562 90.04 90.07 89.92 560 90.14 90.22 90.15 558 90.16 90.21 90.02 556 90.07 90.17 90.06 554 90.21 90.42 90.15 552 90.29 90.20 89.99 550 90.07 90.30 90.20 548 90.22 90.17 90.15 546 90.19 90.33 90.27 544 90.19 90.36 90.34 542 90.16 90.46 90.13 540 90.18 90.34 90.25 538 90.13 90.43 90.28 536 90.41 90.40 90.17 534 90.33 90.39 90.17 532 89.99 90.25 90.32 530 90.31 90.51 90.18 528 90.09 90.19 90.26 526 90.21 90.27 90.51 524 90.16 90.38 90.61 522 90.31 90.62 90.33 520 90.34 90.49 90.48 518 90.34 90.69 90.71 516 90.49 90.38 90.35 514 90.45 90.63 90.33 512 90.31 90.49 90.57 510 90.51 90.41 90.36 508 90.31 90.45 90.61 506 90.26 90.53 90.37 504 90.25 90.60 90.57 502 90.48 90.68 90.52 500 90.42 90.45 90.62 498 90.38 90.56 90.44 496 90.47 90.54 90.47 494 90.67 90.65 90.46 492 90.45 90.64 90.60 490 90.42 90.57 90.62 488 90.60 90.82 90.51 486 90.60 90.88 90.59 484 90.76 90.41 90.37 482 90.77 90.52 90.59 480 90.46 90.66 90.52 478 90.64 90.81 90.74 476 90.57 90.80 90.59 474 90.59 90.42 90.85 472 90.62 90.58 90.65 470 90.72 90.78 90.72 468 90.54 90.59 90.80 466 90.72 90.54 90.68 464 90.47 90.59 90.72 462 90.46 90.72 90.44 460 90.48 90.91 90.71 458 90.70 90.70 90.76 456 90.57 90.76 90.63 454 90.81 90.77 90.80 452 90.45 90.66 90.78 450 90.59 90.35 90.70 448 90.68 90.75 90.40 446 90.66 90.86 90.77 444 90.68 90.87 90.74 442 90.66 91.18 90.94 440 90.79 90.98 90.80 438 90.93 91.05 90.60 436 90.71 90.66 90.52 434 90.39 91.21 90.75 432 90.75 90.57 90.88 430 90.67 90.84 90.77 428 90.67 90.91 91.09 426 90.61 91.09 91.03 424 91.03 90.87 91.04 422 90.60 91.08 91.04 420 90.58 91.15 91.27 418 91.08 91.14 90.69 416 90.59 91.15 90.63 414 90.66 90.87 91.12 412 90.88 91.06 90.56 410 90.99 91.13 90.98 408 90.95 91.17 91.02 406 90.97 90.72 91.43 404 90.92 90.71 90.81 402 90.66 91.03 91.06 400 91.06 90.77 91.09 398 90.77 91.36 90.88 396 91.20 90.98 91.20 394 91.02 91.16 90.50 392 91.20 90.55 90.96 390 90.86 90.97 90.86 388 91.08 91.83 90.58 386 90.72 91.20 90.98 384 90.59 90.27 91.12 382 90.32 91.03 90.57 380 90.62 90.74 90.95