# 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 2018-06-21 (244 days after) # Measured four times at around the position 3 # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) Pos.3 #1 Pos.3 #2 Pos.3 #3 Pos.3 #4 1000 92.74 92.38 92.05 92.55 998 91.36 91.39 90.63 91.69 996 92.23 92.07 91.49 92.07 994 91.38 91.84 91.48 91.85 992 91.92 90.71 90.70 91.84 990 90.95 92.37 91.44 92.23 988 91.31 92.21 91.44 92.08 986 91.63 92.12 91.54 92.17 984 91.27 92.22 90.64 91.78 982 91.21 92.28 91.25 91.83 980 91.65 92.02 90.53 91.69 978 91.41 91.73 91.33 91.53 976 91.85 92.11 90.81 91.77 974 91.61 91.51 90.73 91.41 972 90.92 91.14 90.86 91.04 970 91.10 91.33 91.23 91.00 968 91.22 91.29 90.73 90.66 966 90.95 91.26 90.57 90.99 964 91.33 91.49 90.62 91.08 962 90.39 91.45 90.65 91.14 960 90.84 91.17 91.12 90.53 958 91.31 91.03 91.13 90.61 956 91.22 91.23 90.43 91.07 954 90.91 90.80 90.50 90.89 952 90.53 91.16 90.90 90.53 950 90.38 91.32 90.41 90.15 948 90.52 91.22 90.00 91.09 946 90.64 91.21 90.25 90.73 944 90.80 90.64 90.18 90.01 942 90.40 90.61 90.01 90.09 940 90.31 90.09 89.96 89.99 938 89.88 90.25 89.52 89.70 936 90.10 90.30 89.44 90.48 934 90.28 90.23 89.67 89.85 932 90.27 90.49 89.54 89.75 930 89.92 90.08 89.39 89.70 928 89.78 89.42 89.31 89.83 926 89.62 89.92 89.28 89.39 924 89.55 90.22 89.36 89.41 922 89.09 89.69 89.06 89.27 920 88.91 89.69 89.16 89.34 918 89.40 89.66 89.01 89.35 916 89.05 89.58 88.99 89.25 914 88.88 89.23 88.83 88.76 912 88.90 89.37 88.66 88.32 910 88.91 88.95 88.70 89.05 908 88.72 88.70 88.21 88.12 906 88.33 88.67 88.12 87.96 904 88.03 88.36 88.30 88.21 902 88.16 88.18 88.26 88.02 900 88.06 87.93 87.85 88.34 898 88.05 88.50 87.72 87.88 896 87.59 88.06 87.95 87.82 894 87.87 87.55 87.77 87.77 892 87.26 87.72 87.23 87.80 890 87.23 87.53 87.14 87.38 888 87.25 87.21 87.20 86.80 886 87.11 87.73 87.02 86.85 884 86.72 86.94 86.92 87.21 882 86.72 86.96 86.52 86.50 880 86.56 86.96 86.45 86.81 878 86.53 86.79 86.37 86.85 876 86.41 86.35 85.87 86.35 874 86.13 86.68 85.99 86.27 872 85.94 86.36 85.84 86.16 870 85.89 86.03 86.10 86.20 868 85.78 86.10 85.70 85.92 866 85.59 85.82 85.38 85.90 864 85.52 85.43 85.40 85.45 862 85.30 85.53 85.10 85.50 860 85.44 85.79 85.23 85.47 858 85.20 85.50 85.03 85.21 856 85.38 85.36 84.80 84.77 854 84.81 84.89 84.80 84.88 852 84.82 85.04 85.07 84.88 850 84.55 84.86 84.56 84.79 848 84.55 84.91 84.37 84.71 846 84.59 84.57 84.09 84.07 844 84.45 84.47 84.04 84.43 842 84.24 84.43 83.93 84.28 840 84.11 84.18 84.34 84.24 838 84.27 84.05 84.03 84.18 836 83.79 84.26 83.75 84.53 834 84.02 84.55 84.35 84.00 832 83.97 84.79 84.23 83.97 830 84.30 84.45 83.65 84.37 828 84.06 84.36 83.94 83.99 826 83.89 84.68 84.16 83.94 824 84.19 84.22 83.85 84.43 822 84.16 84.48 83.99 84.09 820 83.81 84.21 83.86 84.38 818 83.91 84.40 83.95 83.87 816 84.11 84.05 83.97 83.95 814 83.98 84.37 84.00 84.00 812 83.92 84.24 84.07 83.94 810 84.09 84.52 84.15 84.12 808 84.26 84.70 84.25 84.14 806 84.34 84.45 84.31 84.53 804 84.46 84.87 84.08 84.30 802 84.35 84.71 84.13 84.53 800 84.38 84.72 84.31 84.58 798 84.49 84.43 84.25 84.54 796 84.72 84.71 84.11 84.47 794 84.51 84.93 84.22 84.68 792 84.47 84.72 84.41 84.58 790 84.71 84.92 84.62 84.65 788 84.70 85.05 84.63 84.82 786 84.90 84.95 84.71 84.84 784 85.04 85.23 85.14 84.87 782 85.15 85.26 84.94 85.05 780 85.41 84.95 84.83 85.18 778 85.09 85.34 85.01 85.02 776 85.19 85.32 85.17 85.17 774 85.67 85.47 85.22 85.32 772 85.22 85.53 85.01 85.35 770 85.27 85.49 85.24 85.39 768 85.60 85.82 85.37 85.65 766 85.54 85.86 85.48 85.73 764 85.91 85.72 85.63 85.75 762 85.79 85.76 85.65 85.68 760 85.83 86.11 85.60 85.66 758 85.93 86.18 85.46 85.99 756 85.99 86.11 85.94 85.99 754 85.92 86.05 85.71 85.81 752 85.92 86.33 86.09 86.15 750 86.05 86.41 85.93 86.22 748 86.24 86.14 85.85 86.10 746 86.08 86.45 85.93 86.13 744 86.40 86.39 86.14 86.36 742 86.32 86.56 86.16 86.36 740 86.56 86.68 86.22 86.41 738 86.50 86.77 86.52 86.63 736 86.70 86.78 86.50 86.43 734 86.66 86.88 86.35 86.62 732 86.73 86.78 86.32 86.58 730 86.69 86.99 86.57 86.54 728 86.85 86.91 86.50 86.83 726 86.78 87.11 86.78 86.81 724 87.05 87.11 86.72 86.89 722 87.14 87.12 86.77 86.98 720 86.89 87.11 86.89 87.01 718 86.99 87.13 86.92 87.06 716 87.16 87.22 86.91 87.08 714 87.05 87.36 86.82 87.16 712 87.05 87.39 86.92 87.21 710 87.05 87.21 87.12 87.07 708 87.08 87.43 86.99 87.31 706 87.22 87.39 87.01 87.28 704 87.23 87.55 87.13 87.28 702 87.40 87.62 87.33 87.22 700 87.38 87.51 87.06 87.24 698 87.54 87.56 87.06 87.26 696 87.53 87.62 87.09 87.34 694 87.59 87.75 87.65 87.46 692 87.45 87.96 87.51 87.43 690 87.51 87.84 87.30 87.70 688 87.55 87.85 87.33 87.76 686 87.65 87.83 87.53 87.83 684 87.69 87.92 87.51 87.46 682 87.64 88.13 87.53 87.71 680 87.67 88.05 87.53 87.64 678 87.82 87.91 87.58 87.91 676 87.55 87.82 87.68 87.65 674 88.13 87.90 87.78 87.62 672 87.92 88.03 87.93 87.77 670 87.88 88.31 87.86 87.79 668 87.85 88.26 87.82 87.98 666 87.83 88.09 87.78 87.79 664 87.97 88.31 87.95 87.98 662 88.24 88.32 87.95 88.01 660 87.99 88.38 88.10 88.08 658 88.06 88.25 87.93 88.05 656 87.97 88.50 88.09 88.04 654 88.24 88.46 88.18 88.05 652 88.05 88.18 88.00 88.27 650 88.10 88.48 88.17 88.04 648 88.24 88.41 88.10 88.16 646 88.26 88.63 88.14 88.29 644 88.36 88.56 88.17 88.22 642 88.22 88.63 88.29 88.53 640 88.53 88.69 88.04 88.46 638 88.57 88.65 88.12 88.16 636 88.42 88.74 88.30 88.45 634 88.34 88.55 88.24 88.28 632 88.52 88.74 88.35 88.29 630 88.54 88.67 88.24 88.33 628 88.48 88.74 88.27 88.35 626 88.47 88.70 88.54 88.51 624 88.50 88.78 88.44 88.55 622 88.50 88.82 88.44 88.62 620 88.64 88.89 88.47 88.55 618 88.44 88.94 88.52 88.62 616 88.71 89.06 88.56 88.67 614 88.82 88.90 88.45 88.62 612 88.72 88.77 88.60 88.70 610 88.83 88.99 88.65 88.61 608 88.81 88.91 88.55 88.64 606 88.75 88.99 88.61 88.63 604 88.86 88.93 88.45 88.62 602 88.88 89.19 88.58 88.49 600 88.88 88.90 88.65 88.79 598 88.93 89.06 88.72 88.84 596 88.85 89.07 88.55 88.80 594 88.97 88.96 88.73 88.72 592 88.98 89.28 88.47 88.77 590 89.03 89.06 88.57 88.93 588 88.75 89.30 88.74 88.94 586 88.97 89.14 88.91 88.84 584 88.90 89.09 88.90 88.86 582 88.86 89.18 88.78 89.10 580 89.03 89.07 88.77 88.98 578 88.97 89.05 88.79 89.04 576 88.99 89.28 88.86 89.00 574 88.98 89.36 88.93 89.03 572 88.92 89.30 89.01 89.02 570 89.07 89.29 88.81 88.94 568 89.14 89.16 88.82 88.95 566 89.10 89.31 89.01 88.96 564 88.87 89.38 88.85 88.99 562 89.01 89.24 89.00 89.07 560 89.12 89.32 89.03 89.09 558 89.15 89.49 89.13 89.03 556 89.11 89.37 89.01 89.19 554 89.24 89.28 89.17 89.23 552 89.23 89.20 89.08 89.14 550 89.14 89.48 88.88 89.31 548 89.19 89.50 89.17 89.08 546 89.23 89.26 89.02 89.15 544 89.28 89.31 88.96 89.17 542 89.13 89.56 88.90 89.14 540 89.14 89.62 89.03 89.23 538 89.34 89.37 88.99 89.31 536 89.36 89.44 89.15 89.43 534 89.53 89.65 89.05 89.12 532 89.23 89.72 89.24 89.15 530 89.55 89.40 89.22 89.28 528 89.33 89.60 89.08 89.20 526 89.57 89.60 89.26 89.38 524 89.37 89.54 89.25 89.19 522 89.37 89.63 89.03 89.20 520 89.51 89.60 89.19 89.45 518 89.47 89.50 89.13 89.30 516 89.41 89.87 89.11 89.21 514 89.26 89.64 89.20 89.07 512 89.48 89.45 89.17 89.07 510 89.44 89.76 89.39 89.38 508 89.34 89.65 89.46 89.09 506 89.44 89.75 89.55 89.29 504 89.47 89.74 89.30 89.33 502 89.54 89.55 89.39 89.18 500 89.39 89.86 89.28 89.23 498 89.38 89.66 89.28 89.33 496 89.29 89.60 89.37 89.37 494 89.57 89.69 89.15 89.36 492 89.55 89.69 89.44 89.47 490 89.55 89.98 89.61 89.30 488 89.41 89.78 89.30 89.17 486 89.79 89.80 89.61 89.32 484 89.49 89.52 89.54 89.43 482 89.63 89.73 89.42 89.35 480 89.66 89.65 89.38 89.47 478 89.64 89.25 89.13 89.47 476 89.78 89.79 89.45 89.48 474 89.60 89.84 89.61 89.30 472 89.49 89.90 89.20 89.31 470 89.68 89.64 89.51 89.36 468 89.78 89.76 89.25 89.30 466 89.47 89.90 89.35 89.26 464 89.48 89.98 89.51 89.30 462 89.72 89.75 89.18 89.37 460 89.61 89.79 89.53 89.18 458 89.47 89.76 89.64 89.14 456 89.37 89.78 89.35 89.18 454 89.61 89.80 89.50 89.20 452 89.65 90.10 89.71 89.27 450 89.74 90.34 89.53 89.43 448 89.90 89.85 89.52 89.50 446 89.76 89.90 89.30 89.43 444 89.78 90.17 89.43 89.58 442 89.71 89.96 89.43 89.47 440 89.55 89.78 89.34 89.42 438 89.59 90.06 88.97 89.32 436 89.42 89.48 89.17 89.12 434 89.97 89.96 89.63 89.37 432 89.66 89.88 89.13 89.63 430 89.94 90.18 89.53 89.42 428 89.95 89.51 89.60 89.44 426 89.68 90.13 89.60 89.26 424 89.66 89.92 89.52 89.49 422 89.76 89.72 89.50 89.48 420 89.75 89.84 89.48 89.78 418 90.11 89.85 89.19 89.55 416 90.04 90.38 89.44 89.34 414 89.85 89.94 89.76 89.18 412 89.74 90.04 89.60 89.48 410 89.79 89.62 89.61 88.97 408 89.56 89.66 89.50 89.26 406 89.32 90.20 88.97 89.34 404 89.82 89.76 89.45 89.28 402 90.00 89.64 89.54 89.39 400 89.73 89.58 89.21 89.42 398 89.90 89.94 89.26 89.46 396 89.56 89.63 88.96 89.44 394 89.80 90.38 89.70 89.66 392 89.49 89.94 89.07 89.20 390 89.30 89.85 89.79 89.49 388 90.48 90.00 89.47 89.36 386 89.70 89.90 89.70 90.05 384 88.92 89.25 89.18 90.49 382 89.30 88.92 90.12 89.99 380 89.30 88.81 89.44 89.77