# 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 2018-04-18 (180 days after, pre 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 92.72 92.63 92.21 998 92.42 92.05 91.21 996 92.35 91.72 91.67 994 92.43 92.66 92.10 992 92.09 91.79 91.45 990 92.30 92.18 91.79 988 92.29 91.79 92.19 986 91.78 91.24 92.04 984 92.00 91.78 91.72 982 92.40 91.99 90.91 980 91.98 92.11 91.65 978 91.58 91.77 91.73 976 92.43 91.42 92.27 974 92.38 91.67 91.56 972 91.62 91.24 92.07 970 91.63 91.54 91.54 968 91.19 91.89 91.66 966 91.79 91.78 91.42 964 91.61 91.66 90.93 962 91.50 90.76 90.90 960 91.71 91.08 91.01 958 91.76 91.37 91.08 956 91.74 90.82 91.28 954 91.01 91.29 90.93 952 90.47 90.95 91.15 950 90.83 90.84 90.78 948 90.71 90.95 91.38 946 91.02 90.35 90.58 944 90.98 90.93 90.82 942 90.39 90.93 90.64 940 90.55 90.34 90.82 938 90.36 90.58 90.05 936 90.39 90.17 90.47 934 90.82 90.55 90.16 932 90.08 90.29 90.35 930 90.08 90.15 90.07 928 90.09 90.07 90.13 926 90.11 90.10 89.73 924 90.09 89.79 89.64 922 90.21 89.48 89.73 920 90.04 89.69 89.28 918 89.92 89.61 89.10 916 89.63 89.65 89.49 914 89.29 89.33 89.47 912 89.08 89.29 89.21 910 88.90 88.99 89.04 908 89.24 89.02 88.87 906 88.95 88.77 88.62 904 88.80 88.39 88.60 902 88.29 88.15 88.62 900 88.62 88.37 88.23 898 88.40 88.44 88.01 896 88.41 88.43 88.02 894 88.55 88.16 87.81 892 87.90 88.10 87.80 890 87.47 87.56 87.76 888 87.51 87.74 87.65 886 87.52 87.57 87.63 884 87.30 87.03 87.05 882 87.28 87.20 86.99 880 87.12 87.25 86.95 878 86.92 86.74 87.19 876 86.81 86.70 86.64 874 86.58 86.51 86.46 872 86.69 86.41 85.98 870 86.27 86.23 85.82 868 85.81 86.15 86.04 866 86.16 85.98 85.66 864 85.92 85.90 85.78 862 85.91 85.83 85.12 860 85.63 85.40 85.49 858 85.44 85.41 85.45 856 85.69 85.27 85.31 854 85.55 85.13 85.06 852 85.36 85.10 84.98 850 85.05 85.56 84.62 848 84.87 84.83 84.94 846 84.96 84.75 84.68 844 84.89 84.61 84.67 842 84.63 84.77 84.64 840 84.51 84.58 84.60 838 84.42 84.63 84.71 836 84.60 84.41 84.37 834 84.56 84.84 84.65 832 84.45 84.51 84.40 830 84.62 84.19 84.16 828 84.60 84.72 84.40 826 84.27 84.36 84.50 824 84.39 83.88 84.15 822 84.39 84.35 84.23 820 84.74 84.14 84.51 818 84.70 84.08 83.96 816 84.73 84.42 84.07 814 84.93 84.59 84.34 812 84.36 84.38 84.22 810 84.74 84.51 84.26 808 84.60 84.59 84.54 806 84.57 84.44 84.58 804 84.63 84.70 84.65 802 84.92 84.68 84.40 800 84.88 84.64 84.39 798 84.83 84.75 84.72 796 85.05 84.78 85.13 794 84.79 84.96 84.91 792 84.85 84.94 85.00 790 85.15 85.06 85.04 788 85.11 84.98 85.17 786 85.42 85.21 84.99 784 85.47 85.62 85.07 782 85.33 85.46 85.08 780 85.53 85.46 85.35 778 85.66 85.56 85.35 776 85.61 85.74 85.58 774 85.56 85.73 85.54 772 85.75 85.68 85.74 770 85.84 85.70 85.60 768 85.95 85.85 85.54 766 85.96 86.03 85.96 764 85.81 86.01 85.69 762 86.03 86.32 85.97 760 85.95 85.91 85.87 758 86.30 86.27 86.28 756 86.31 86.47 86.36 754 86.33 86.49 86.29 752 86.53 86.53 86.30 750 86.36 86.51 86.33 748 86.81 86.39 86.45 746 86.50 86.54 86.48 744 86.75 86.68 86.60 742 86.73 86.75 86.49 740 86.89 86.74 86.65 738 86.82 86.90 86.77 736 86.94 86.85 86.88 734 86.97 87.09 87.16 732 87.29 87.16 87.00 730 87.17 86.94 87.17 728 87.24 86.95 87.16 726 87.04 87.29 87.09 724 87.07 87.22 86.94 722 87.32 87.26 87.25 720 87.33 87.31 87.24 718 87.53 87.09 87.06 716 87.45 87.44 87.22 714 87.58 87.52 87.52 712 87.40 87.46 87.39 710 87.41 87.61 87.42 708 87.56 87.57 87.58 706 87.74 87.68 87.58 704 87.80 87.74 87.61 702 87.67 87.81 87.77 700 87.71 87.75 87.53 698 87.92 87.84 87.87 696 87.50 87.94 87.67 694 87.73 87.99 87.71 692 87.96 87.89 87.71 690 88.05 87.93 87.87 688 88.07 88.17 87.78 686 88.21 87.97 87.93 684 88.06 88.12 87.93 682 87.97 87.93 87.99 680 88.12 88.13 88.00 678 88.32 88.08 88.02 676 88.36 88.17 87.96 674 88.23 88.13 88.03 672 88.52 88.37 88.12 670 88.28 88.35 88.42 668 88.36 88.39 88.41 666 88.51 88.31 88.56 664 88.46 88.41 88.51 662 88.44 88.50 88.42 660 88.60 88.28 88.47 658 88.47 88.51 88.40 656 88.62 88.47 88.57 654 88.65 88.63 88.58 652 88.60 88.60 88.52 650 88.60 88.80 88.62 648 88.81 88.63 88.77 646 88.74 88.50 88.63 644 88.77 88.72 88.76 642 88.70 88.80 88.57 640 88.89 88.97 88.72 638 88.91 88.88 88.87 636 89.00 88.98 88.76 634 88.90 89.05 88.71 632 89.10 89.10 88.78 630 89.12 88.98 88.84 628 89.11 88.82 88.72 626 89.00 88.87 88.87 624 88.97 88.90 88.89 622 89.05 88.95 89.02 620 88.93 89.09 89.00 618 89.16 89.09 89.04 616 89.13 89.11 89.00 614 89.06 89.17 88.87 612 89.07 89.05 89.11 610 89.24 89.13 89.15 608 89.24 89.17 89.00 606 89.15 89.22 89.21 604 89.10 89.28 89.10 602 89.03 89.26 89.11 600 89.21 89.34 89.09 598 89.22 89.39 89.15 596 89.16 89.16 89.15 594 89.13 89.39 89.22 592 89.35 89.35 89.19 590 89.36 89.29 89.19 588 89.48 89.36 89.13 586 89.29 89.43 89.29 584 89.35 89.52 89.43 582 89.38 89.32 89.30 580 89.42 89.32 89.55 578 89.48 89.34 89.39 576 89.46 89.47 89.40 574 89.33 89.41 89.24 572 89.56 89.50 89.38 570 89.35 89.57 89.30 568 89.47 89.53 89.39 566 89.63 89.55 89.33 564 89.54 89.59 89.36 562 89.50 89.51 89.36 560 89.54 89.39 89.43 558 89.72 89.48 89.43 556 89.57 89.45 89.27 554 89.66 89.49 89.45 552 89.45 89.49 89.57 550 89.76 89.52 89.33 548 89.59 89.49 89.50 546 89.59 89.55 89.46 544 89.55 89.79 89.70 542 89.45 89.72 89.47 540 89.70 89.73 89.45 538 89.80 89.74 89.60 536 89.71 89.73 89.60 534 89.58 89.69 89.44 532 89.80 89.81 89.68 530 89.69 90.05 89.67 528 89.89 89.59 89.53 526 89.66 89.71 89.72 524 89.78 89.72 89.49 522 89.80 89.82 89.62 520 89.79 89.78 89.85 518 90.08 89.79 89.82 516 89.85 89.87 89.78 514 89.76 90.12 89.62 512 89.89 90.08 89.84 510 89.67 89.84 89.81 508 89.74 89.97 89.83 506 89.71 89.78 89.64 504 89.73 89.85 89.65 502 89.95 89.93 89.77 500 89.99 89.91 89.69 498 89.83 89.84 89.75 496 89.95 89.87 89.80 494 90.01 89.89 89.67 492 89.70 89.94 89.67 490 89.90 90.07 89.73 488 89.95 89.77 89.74 486 90.00 89.83 89.86 484 89.89 89.97 89.67 482 89.76 89.97 89.53 480 89.93 89.93 89.78 478 89.97 89.91 89.75 476 89.89 89.97 89.65 474 89.93 90.05 89.73 472 90.00 89.86 89.77 470 89.91 89.97 89.59 468 90.00 89.86 89.92 466 89.93 89.99 89.59 464 89.92 89.92 89.87 462 90.10 90.00 89.74 460 89.92 89.87 89.77 458 89.89 90.03 89.55 456 90.03 89.67 89.86 454 90.24 90.10 89.92 452 89.69 90.03 89.93 450 90.00 90.02 89.93 448 90.13 89.86 89.74 446 89.83 89.87 89.76 444 89.75 89.73 89.82 442 89.73 89.87 90.06 440 89.93 89.94 89.72 438 89.92 89.72 89.81 436 89.62 89.22 89.28 434 90.01 89.84 89.74 432 89.93 89.97 89.75 430 90.24 90.12 89.66 428 90.33 89.98 89.72 426 89.98 90.10 90.07 424 90.11 90.53 89.73 422 89.60 90.49 89.68 420 90.17 89.89 90.09 418 90.09 90.05 89.36 416 90.03 90.02 89.67 414 90.52 90.17 89.90 412 90.29 90.34 90.19 410 90.15 90.06 90.19 408 89.89 90.18 89.69 406 89.78 89.87 89.30 404 89.99 90.22 89.75 402 90.47 89.93 90.23 400 90.12 90.01 89.80 398 89.69 90.16 89.16 396 90.04 89.80 90.19 394 89.58 90.04 89.52 392 89.89 90.28 90.45 390 90.23 89.78 89.98 388 89.52 89.85 89.91 386 89.58 90.58 89.08 384 89.58 89.67 89.80 382 90.05 90.07 89.25 380 90.37 89.30 89.47