# 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 2018-04-19 (181 days after, post CO2 cleaning) # 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 92.41 92.01 92.34 998 92.00 92.37 92.34 996 91.14 92.33 92.51 994 92.28 91.82 91.77 992 92.83 92.65 92.13 990 92.55 92.32 91.69 988 92.14 92.60 91.85 986 92.59 91.86 92.13 984 91.68 92.00 91.91 982 91.70 92.69 92.69 980 92.23 92.21 91.77 978 91.94 92.22 92.33 976 91.87 91.87 92.13 974 91.89 92.24 91.75 972 91.35 91.87 91.53 970 91.64 92.10 91.96 968 91.59 91.51 91.23 966 91.71 91.41 91.61 964 91.97 91.65 91.03 962 90.99 91.87 91.41 960 91.63 91.52 91.36 958 91.52 91.81 91.37 956 90.85 91.36 91.38 954 91.35 90.92 91.06 952 91.21 91.01 91.37 950 90.98 91.52 90.89 948 90.99 90.28 90.89 946 91.16 90.76 90.86 944 91.17 91.34 90.82 942 91.12 90.97 90.65 940 91.02 91.04 90.59 938 90.92 91.11 90.59 936 91.04 90.52 90.88 934 90.17 90.16 90.55 932 90.45 90.65 89.84 930 90.67 90.08 89.67 928 90.44 90.58 89.89 926 90.66 90.47 89.81 924 90.37 89.87 90.19 922 89.57 90.09 90.02 920 89.98 89.81 89.80 918 89.73 89.50 89.56 916 89.25 89.15 89.66 914 88.85 89.33 89.23 912 89.28 89.71 89.07 910 88.98 89.30 89.40 908 89.10 89.54 89.12 906 88.94 89.08 89.11 904 88.75 88.79 88.94 902 88.53 88.61 88.74 900 88.87 88.91 88.24 898 88.82 88.29 88.92 896 88.36 87.96 88.23 894 88.10 88.09 88.17 892 88.26 87.88 87.95 890 87.99 87.88 87.87 888 87.71 87.73 87.90 886 87.95 87.61 87.89 884 87.47 87.46 87.66 882 87.57 87.21 87.24 880 87.19 87.04 87.06 878 86.93 86.93 86.89 876 86.95 86.83 86.56 874 86.76 86.60 86.46 872 86.47 86.58 86.70 870 86.81 86.50 86.34 868 86.63 86.08 86.43 866 86.25 86.26 86.11 864 86.19 85.87 85.84 862 85.93 85.73 85.79 860 85.93 85.58 85.77 858 85.72 85.52 85.80 856 85.67 85.54 85.50 854 85.56 85.48 85.59 852 85.37 85.18 85.50 850 85.18 85.20 84.96 848 85.38 84.90 85.36 846 85.15 84.90 85.03 844 85.30 84.93 84.78 842 85.13 84.84 84.81 840 84.73 84.76 84.74 838 84.63 84.72 84.70 836 84.63 84.71 84.68 834 84.85 84.64 84.69 832 84.65 84.52 84.66 830 84.78 84.54 84.41 828 84.94 84.68 84.73 826 84.62 84.30 84.31 824 84.62 84.50 84.44 822 84.30 84.63 84.21 820 84.40 84.58 84.43 818 84.47 84.33 84.48 816 84.55 84.44 84.63 814 84.55 84.56 84.39 812 84.52 84.49 84.90 810 84.50 84.56 84.35 808 84.61 84.41 84.69 806 84.63 84.81 84.83 804 84.78 84.46 84.65 802 84.61 84.82 84.76 800 84.90 84.81 84.83 798 84.87 84.81 85.18 796 84.96 85.08 84.96 794 85.04 85.07 84.72 792 84.95 84.74 85.20 790 85.19 85.10 85.03 788 85.55 85.19 85.15 786 85.35 85.43 85.31 784 85.32 85.57 85.49 782 85.72 85.72 85.63 780 85.61 85.47 85.53 778 85.74 85.49 85.72 776 85.60 85.72 85.61 774 85.87 85.68 85.87 772 85.89 85.83 85.53 770 85.83 85.80 85.58 768 86.06 86.03 85.93 766 86.04 86.02 85.98 764 86.51 86.12 85.99 762 86.42 86.39 86.21 760 86.58 86.40 86.43 758 86.40 86.38 86.56 756 86.48 86.41 86.49 754 86.50 86.45 86.64 752 86.73 86.59 86.39 750 86.70 86.68 86.38 748 86.62 86.54 86.60 746 86.65 86.72 86.80 744 86.68 86.81 86.81 742 86.74 86.83 86.68 740 87.19 86.83 86.93 738 86.96 86.75 86.82 736 87.22 87.13 87.12 734 87.00 87.21 86.81 732 87.27 87.04 86.76 730 87.22 87.08 87.23 728 87.52 87.31 87.22 726 87.07 87.33 87.28 724 87.58 87.16 87.39 722 87.38 87.54 87.52 720 87.69 87.59 87.32 718 87.43 87.10 87.48 716 87.76 87.46 87.43 714 87.78 87.56 87.49 712 87.68 87.63 87.54 710 87.55 87.68 87.52 708 88.15 87.79 87.88 706 87.90 87.75 87.64 704 87.78 87.92 87.78 702 87.70 87.81 87.65 700 88.21 87.94 87.79 698 88.06 88.02 87.88 696 88.20 88.19 87.71 694 88.17 88.14 87.80 692 88.15 88.32 88.06 690 88.20 88.03 88.09 688 88.25 88.02 88.10 686 88.25 88.25 88.22 684 88.31 88.35 88.18 682 88.44 88.17 88.04 680 88.49 88.26 88.21 678 88.36 88.41 88.40 676 88.53 88.40 88.36 674 88.20 88.51 88.19 672 88.44 88.57 88.42 670 88.46 88.54 88.38 668 88.42 88.44 88.37 666 88.63 88.56 88.41 664 88.58 88.50 88.57 662 88.76 88.67 88.75 660 88.84 88.60 88.44 658 88.90 88.78 88.77 656 88.91 88.76 88.64 654 88.88 88.80 88.57 652 89.00 88.83 88.72 650 88.81 88.80 88.92 648 88.92 88.86 88.92 646 89.04 89.07 88.90 644 89.16 89.02 88.83 642 89.23 88.87 88.92 640 89.01 88.99 88.97 638 89.13 89.04 88.86 636 89.13 89.28 89.11 634 89.22 89.11 88.97 632 89.23 89.09 89.11 630 89.27 89.28 89.14 628 89.19 89.39 88.93 626 89.30 89.37 88.92 624 89.32 89.21 89.24 622 89.15 89.21 89.15 620 89.39 89.22 89.09 618 89.47 89.23 89.12 616 89.26 89.20 89.33 614 89.39 89.29 89.31 612 89.35 89.45 89.29 610 89.38 89.29 89.24 608 89.56 89.39 89.43 606 89.39 89.18 89.19 604 89.51 89.33 89.06 602 89.48 89.47 89.38 600 89.50 89.47 89.36 598 89.62 89.45 89.41 596 89.51 89.42 89.20 594 89.52 89.50 89.41 592 89.56 89.54 89.56 590 89.70 89.48 89.49 588 89.44 89.47 89.47 586 89.76 89.71 89.55 584 89.74 89.54 89.42 582 89.77 89.61 89.68 580 89.77 89.67 89.53 578 89.85 89.64 89.55 576 89.55 89.42 89.63 574 89.72 89.55 89.69 572 89.70 89.63 89.54 570 89.90 89.73 89.59 568 89.73 89.72 89.66 566 89.64 89.77 89.65 564 89.69 89.78 89.64 562 89.70 89.72 89.64 560 89.99 89.75 89.66 558 89.85 89.89 89.82 556 90.01 89.79 89.91 554 89.78 89.58 89.67 552 89.72 89.71 89.61 550 89.92 89.84 89.93 548 89.88 89.70 89.48 546 89.95 89.82 89.73 544 89.99 89.78 89.96 542 89.95 90.01 89.92 540 90.02 89.82 89.89 538 89.95 89.73 89.88 536 89.95 89.86 89.82 534 90.06 89.93 89.81 532 90.12 89.97 89.91 530 89.93 89.74 89.71 528 89.94 89.97 89.93 526 89.96 89.88 89.83 524 90.14 89.83 89.71 522 90.14 89.91 90.10 520 89.89 90.03 89.89 518 90.07 89.89 89.96 516 90.08 90.03 89.95 514 90.05 90.02 89.88 512 90.07 90.08 89.90 510 90.14 89.96 90.01 508 90.11 90.04 90.08 506 90.27 90.10 90.08 504 90.06 89.95 89.98 502 90.05 90.32 89.99 500 90.21 90.16 90.00 498 90.25 89.95 89.97 496 90.09 90.01 89.99 494 89.99 90.26 90.00 492 90.45 90.02 90.17 490 90.32 90.06 90.08 488 90.22 89.96 89.99 486 90.18 89.97 90.06 484 90.11 90.21 90.00 482 90.23 90.20 90.21 480 90.46 90.10 89.96 478 90.36 90.14 89.94 476 90.20 90.30 90.10 474 90.28 90.20 90.13 472 90.40 90.05 89.90 470 90.36 90.17 89.95 468 90.48 90.25 90.25 466 90.17 90.18 90.01 464 90.45 90.25 90.29 462 90.46 90.19 90.16 460 90.19 90.17 90.24 458 90.24 90.20 90.15 456 90.36 90.33 90.40 454 90.44 90.01 89.88 452 90.35 90.24 90.14 450 90.16 90.36 90.14 448 90.22 90.33 90.01 446 90.42 90.22 90.17 444 90.44 90.36 90.20 442 90.39 90.41 90.20 440 90.40 90.27 90.32 438 90.20 90.31 89.92 436 90.22 89.94 89.64 434 90.38 90.05 90.39 432 90.43 90.53 90.30 430 90.21 90.39 90.09 428 90.19 90.32 90.09 426 90.43 90.23 90.05 424 90.28 90.41 90.29 422 90.53 90.40 90.29 420 90.20 89.85 90.57 418 90.28 90.41 90.25 416 90.11 90.53 89.95 414 91.11 90.52 90.90 412 90.41 90.16 89.69 410 90.21 90.36 90.10 408 90.43 90.64 90.19 406 90.49 90.31 90.09 404 90.24 90.14 90.01 402 90.76 90.03 89.70 400 90.36 89.95 90.11 398 90.65 90.15 90.03 396 90.79 90.24 90.46 394 90.48 90.25 90.02 392 90.55 90.15 89.72 390 90.15 90.96 90.21 388 90.78 90.52 89.51 386 90.86 90.10 89.87 384 89.72 90.53 90.41 382 90.54 89.94 90.33 380 90.60 90.15 90.24