# 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 2018-07-23 (276 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 91.66 91.67 92.77 998 91.68 92.20 92.24 996 91.66 92.81 91.61 994 91.09 92.33 92.02 992 90.98 92.04 91.87 990 90.79 91.49 91.95 988 91.81 91.66 91.68 986 91.68 91.69 91.68 984 91.30 91.25 91.08 982 91.15 91.77 91.57 980 91.59 92.24 90.86 978 90.96 91.79 91.00 976 91.19 91.91 91.33 974 91.76 91.55 90.86 972 91.86 91.25 90.75 970 91.19 90.57 90.86 968 91.57 91.01 91.15 966 90.31 91.72 90.76 964 91.04 91.30 91.11 962 91.00 91.10 90.70 960 90.71 90.58 90.61 958 90.95 91.25 90.70 956 91.01 91.21 90.38 954 90.37 90.73 90.61 952 90.39 90.88 90.49 950 90.52 91.42 90.80 948 90.36 90.49 90.70 946 90.06 91.00 91.11 944 90.28 90.20 90.19 942 90.20 90.86 90.32 940 89.87 89.60 90.22 938 90.01 90.33 90.43 936 90.59 90.07 90.07 934 90.08 89.99 89.89 932 89.56 89.72 89.94 930 89.15 89.60 89.32 928 89.39 89.90 89.38 926 89.52 89.71 89.38 924 89.06 89.61 89.47 922 89.01 89.66 88.61 920 89.20 89.57 89.24 918 89.11 89.07 88.57 916 88.62 88.95 88.93 914 89.05 89.15 88.71 912 88.88 88.77 88.91 910 89.00 88.90 88.69 908 88.53 88.65 88.07 906 88.19 88.52 87.79 904 88.33 88.31 88.00 902 87.94 88.04 88.20 900 88.41 87.92 87.93 898 87.82 87.81 87.63 896 87.53 87.78 87.70 894 87.51 87.96 87.34 892 87.48 87.29 87.07 890 87.55 87.58 87.37 888 87.16 86.88 87.20 886 86.98 86.96 86.98 884 86.70 86.90 86.71 882 86.92 86.94 86.48 880 86.19 86.67 86.25 878 86.47 86.42 86.20 876 86.31 86.30 86.03 874 86.08 86.11 85.88 872 86.12 86.15 86.26 870 85.73 85.95 85.61 868 85.69 85.90 85.69 866 85.54 85.44 85.35 864 85.38 85.59 85.31 862 85.08 85.27 85.27 860 85.41 85.35 85.41 858 84.84 85.45 85.24 856 84.94 85.30 84.83 854 84.56 84.89 84.55 852 84.66 84.81 84.60 850 84.46 84.75 84.36 848 84.38 84.77 84.67 846 84.17 84.42 84.11 844 84.21 84.56 84.32 842 84.23 84.36 84.20 840 84.21 84.26 84.02 838 84.08 84.28 84.01 836 84.11 84.32 83.97 834 84.01 84.18 84.15 832 84.05 84.03 84.01 830 83.92 83.90 83.72 828 84.29 83.94 83.89 826 83.85 84.43 83.53 824 83.50 84.26 83.75 822 83.97 84.15 83.88 820 83.54 84.08 83.77 818 83.80 83.94 83.97 816 84.02 83.98 83.69 814 84.09 83.86 84.12 812 84.07 84.22 83.94 810 83.81 84.22 84.06 808 83.79 84.47 84.18 806 84.09 84.28 84.07 804 84.07 84.22 84.19 802 84.29 84.57 84.22 800 84.41 84.72 84.20 798 84.25 84.59 84.18 796 84.28 84.50 84.54 794 84.47 84.35 84.56 792 84.25 84.58 84.48 790 84.50 84.89 84.56 788 84.55 84.34 84.92 786 84.57 84.90 84.86 784 84.53 85.15 84.94 782 85.17 84.72 84.80 780 84.88 84.99 84.88 778 84.68 85.00 84.83 776 85.12 85.09 85.07 774 85.21 85.35 85.22 772 84.96 85.20 85.09 770 85.22 85.47 85.14 768 85.23 85.50 85.40 766 85.59 85.68 85.49 764 85.37 85.62 85.63 762 85.60 85.70 85.60 760 85.67 85.98 85.46 758 85.54 85.72 85.71 756 85.91 85.92 85.74 754 85.75 85.79 85.91 752 85.72 86.11 86.01 750 86.04 85.97 85.87 748 86.28 86.04 85.95 746 86.08 86.43 86.05 744 86.14 86.04 86.43 742 86.09 86.43 86.37 740 86.33 86.34 86.33 738 86.58 86.55 86.45 736 86.56 86.72 86.49 734 86.67 86.52 86.57 732 86.53 86.79 86.41 730 86.48 86.82 86.56 728 86.55 86.80 86.38 726 86.63 86.91 86.59 724 86.62 86.89 86.62 722 86.95 87.03 86.72 720 86.60 87.17 86.85 718 86.69 87.21 86.71 716 87.11 87.14 86.91 714 86.91 87.04 86.97 712 86.91 87.02 86.94 710 87.07 87.19 86.74 708 87.04 87.26 87.00 706 86.86 87.22 87.05 704 87.11 87.60 87.07 702 87.29 87.51 87.13 700 87.15 87.36 87.33 698 87.32 87.66 87.42 696 87.20 87.48 87.20 694 87.43 87.55 87.17 692 87.48 87.71 87.35 690 87.31 87.61 87.44 688 87.51 87.77 87.36 686 87.65 87.75 87.29 684 87.64 87.75 87.42 682 87.71 87.88 87.55 680 87.60 87.90 87.48 678 87.41 87.64 87.62 676 87.66 87.98 87.53 674 87.77 87.94 87.75 672 87.52 87.89 87.71 670 87.61 88.01 87.69 668 87.85 87.99 87.75 666 87.82 88.06 87.92 664 88.03 88.12 87.95 662 87.72 88.16 88.06 660 87.77 88.21 88.06 658 87.90 88.13 88.01 656 87.93 88.12 87.89 654 88.19 88.23 88.01 652 88.09 88.30 88.08 650 88.17 88.32 88.16 648 88.01 88.50 88.06 646 88.01 88.62 88.15 644 88.11 88.33 88.22 642 88.31 88.51 88.30 640 88.38 88.39 88.18 638 88.12 88.41 88.40 636 88.19 88.52 88.11 634 88.12 88.57 88.28 632 88.38 88.46 88.35 630 88.48 88.49 88.48 628 88.32 88.57 88.35 626 88.33 88.70 88.32 624 88.26 88.70 88.45 622 88.54 88.71 88.44 620 88.26 88.63 88.45 618 88.40 88.72 88.52 616 88.33 88.68 88.50 614 88.27 88.65 88.40 612 88.47 88.74 88.42 610 88.66 88.77 88.58 608 88.58 88.67 88.55 606 88.49 88.77 88.58 604 88.48 88.93 88.73 602 88.79 88.72 88.49 600 88.62 88.73 88.70 598 88.59 88.92 88.64 596 88.64 88.98 88.61 594 88.69 88.91 88.55 592 88.56 88.84 88.74 590 88.52 88.91 88.61 588 88.54 88.97 88.69 586 88.74 89.05 88.61 584 88.43 89.02 88.70 582 88.50 88.71 88.67 580 88.73 88.97 88.80 578 88.73 88.94 88.82 576 88.73 89.01 88.75 574 88.70 89.12 88.74 572 88.98 89.10 88.81 570 88.77 89.16 88.82 568 88.94 89.08 88.84 566 88.88 89.06 88.89 564 88.65 89.02 88.89 562 88.94 89.19 89.00 560 88.75 89.09 88.73 558 88.74 89.21 88.93 556 88.99 89.30 88.90 554 89.00 89.10 88.74 552 88.80 89.18 88.81 550 88.88 89.02 88.86 548 88.91 89.13 88.96 546 89.08 89.25 88.83 544 88.90 89.29 88.93 542 88.83 89.21 88.81 540 88.73 89.23 88.99 538 88.95 89.08 88.99 536 88.95 89.19 88.78 534 88.95 89.18 88.79 532 88.96 89.53 89.14 530 88.89 89.35 88.95 528 88.82 89.26 88.92 526 88.86 89.49 88.93 524 89.01 89.23 89.02 522 88.95 89.33 88.84 520 89.01 89.24 88.89 518 89.12 89.13 89.12 516 89.09 89.29 89.16 514 88.94 89.35 89.12 512 89.02 89.29 89.11 510 88.80 89.30 89.10 508 89.02 89.47 88.99 506 88.97 89.29 89.16 504 89.04 89.23 89.04 502 89.12 89.32 89.04 500 88.96 89.35 89.37 498 88.99 89.28 89.02 496 89.13 89.31 89.11 494 89.23 89.37 88.94 492 88.93 89.21 89.01 490 88.84 89.21 89.06 488 89.00 89.23 89.07 486 88.95 89.38 88.98 484 89.03 89.46 89.47 482 89.16 89.41 89.13 480 89.01 89.47 89.07 478 88.99 89.44 89.15 476 89.22 89.09 89.04 474 89.22 89.50 89.07 472 89.08 89.26 89.01 470 88.88 89.34 89.09 468 89.18 89.51 89.01 466 88.95 89.31 89.31 464 88.78 89.38 89.10 462 89.17 89.33 89.33 460 88.92 89.56 89.10 458 89.27 89.02 89.10 456 89.12 89.10 89.24 454 89.09 89.21 89.27 452 88.80 89.24 89.17 450 88.88 89.27 89.22 448 89.12 89.36 89.03 446 88.89 89.36 89.05 444 88.82 89.36 89.17 442 89.10 89.40 89.50 440 88.90 89.47 89.07 438 88.96 89.36 89.23 436 88.30 89.00 89.19 434 89.03 89.36 89.05 432 89.20 89.45 88.99 430 89.10 89.53 89.36 428 89.09 89.25 88.89 426 89.07 89.50 89.07 424 89.08 89.32 88.97 422 89.22 89.13 89.06 420 88.92 89.20 89.02 418 89.12 89.40 89.44 416 89.13 89.04 88.85 414 88.58 89.48 89.24 412 88.81 89.26 88.83 410 89.27 89.08 89.31 408 89.32 89.33 88.81 406 89.03 89.11 88.81 404 89.22 89.32 89.19 402 88.53 89.60 88.92 400 88.46 89.21 88.76 398 89.10 89.49 89.39 396 88.56 88.78 89.22 394 89.23 89.04 88.91 392 88.57 88.83 88.86 390 89.45 89.11 88.74 388 89.31 89.36 89.04 386 89.26 88.96 88.45 384 88.67 89.20 88.06 382 89.33 88.83 89.00 380 89.21 89.02 89.24