# Subaru Telescope Primary Mirror In-Situ Measured Reflectivity # Coated with Aluminum on 2022-08-04 # Opened the vacuum chamber on 2022-08-08 # Measured with Subaru Portable Spectrophotometer (SPS) on 2022-10-13 (70 days after) # Measured three times at around the position 3 # Data between 950 nm and 1650 nm are also available (SPS-XWW). # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) Pos.3 #1 Pos.3 #2 Pos.3 #3 1000 92.61 93.42 93.60 998 93.27 92.65 92.44 996 92.80 93.30 92.75 994 91.91 92.96 91.51 992 92.45 93.11 92.43 990 92.17 92.80 92.70 988 92.69 93.65 92.17 986 92.23 93.02 92.98 984 92.60 92.70 93.10 982 92.53 91.93 92.51 980 92.45 93.03 92.68 978 91.78 92.49 92.15 976 92.92 92.33 92.69 974 92.83 93.63 92.89 972 92.40 92.03 92.09 970 92.04 92.60 91.32 968 92.26 91.75 91.87 966 92.74 92.19 92.07 964 91.68 92.37 92.08 962 92.95 92.53 92.73 960 91.97 93.17 92.08 958 91.85 92.14 92.44 956 91.56 91.99 90.98 954 91.66 92.32 92.20 952 91.12 91.81 92.07 950 91.63 91.29 91.77 948 91.52 91.81 91.48 946 91.60 91.69 90.79 944 91.50 91.37 91.20 942 91.20 91.39 91.22 940 90.52 91.57 91.71 938 90.93 91.89 91.03 936 90.84 91.09 91.33 934 90.16 90.88 90.96 932 90.32 91.25 90.63 930 90.61 90.77 90.39 928 90.28 91.13 90.75 926 90.61 90.96 90.89 924 90.58 90.98 90.57 922 90.06 90.28 90.22 920 90.05 90.91 90.13 918 90.03 89.97 90.40 916 90.00 90.54 90.15 914 89.83 89.87 90.02 912 89.97 89.65 89.92 910 89.42 89.57 89.71 908 89.36 89.53 89.71 906 89.26 89.50 89.30 904 89.23 89.16 89.01 902 88.67 89.05 89.09 900 89.26 88.90 89.01 898 89.00 88.77 88.81 896 88.53 89.10 89.02 894 88.01 88.67 88.42 892 88.08 88.46 88.41 890 88.04 88.41 88.15 888 87.74 88.25 88.20 886 87.75 88.14 88.18 884 87.71 87.90 87.62 882 87.48 87.49 87.91 880 87.44 87.38 87.51 878 87.51 87.61 87.41 876 86.87 87.38 86.91 874 87.04 87.34 87.45 872 86.81 86.69 86.76 870 86.33 86.69 86.90 868 86.27 87.08 86.81 866 86.43 86.58 86.15 864 86.18 86.65 85.97 862 85.81 86.35 86.17 860 86.08 86.13 85.90 858 85.94 85.81 85.86 856 85.47 85.88 85.79 854 85.34 85.67 85.57 852 85.65 85.67 85.65 850 85.31 85.23 85.72 848 85.29 85.12 85.21 846 84.98 85.35 85.57 844 85.08 85.65 85.02 842 85.06 85.63 85.00 840 85.03 85.70 84.96 838 85.04 85.31 85.09 836 84.86 85.50 85.18 834 85.09 85.21 84.68 832 85.04 84.55 84.66 830 84.67 84.83 85.02 828 84.77 84.95 85.21 826 84.77 84.70 84.97 824 84.61 85.49 85.12 822 84.76 85.18 84.89 820 84.84 85.01 84.64 818 84.78 85.07 84.78 816 84.83 85.03 84.96 814 85.17 85.27 84.78 812 85.11 85.22 84.90 810 85.02 85.25 85.39 808 85.15 85.54 85.35 806 85.36 85.27 85.30 804 85.25 85.14 85.80 802 85.19 85.56 85.14 800 85.31 85.49 85.14 798 85.28 85.55 85.33 796 85.61 85.50 85.48 794 85.63 86.00 85.69 792 85.84 85.45 85.64 790 85.51 86.10 85.73 788 85.71 86.12 85.74 786 85.81 86.10 85.80 784 86.07 85.99 85.79 782 86.26 86.54 85.99 780 86.00 86.26 85.95 778 85.91 86.31 86.14 776 86.00 86.35 86.20 774 85.99 86.62 86.69 772 86.31 86.82 86.76 770 86.42 86.79 86.39 768 86.58 86.53 86.63 766 86.48 86.68 86.64 764 87.00 86.94 87.01 762 86.74 86.78 86.76 760 86.55 86.84 86.95 758 86.70 87.17 86.98 756 87.00 87.10 86.91 754 87.15 87.34 87.19 752 86.93 87.24 87.45 750 87.01 87.42 87.34 748 87.11 87.53 87.39 746 87.53 87.27 87.55 744 87.47 87.38 87.44 742 87.30 87.38 87.69 740 87.27 87.83 87.44 738 87.60 87.79 87.65 736 87.61 87.97 87.70 734 87.66 87.65 87.79 732 87.82 87.91 87.90 730 87.74 88.00 87.68 728 87.86 87.99 87.84 726 87.86 88.13 87.94 724 87.91 88.04 87.83 722 88.17 88.24 88.22 720 87.88 88.43 88.08 718 88.13 88.40 88.12 716 88.26 88.31 88.17 714 88.06 88.35 88.25 712 88.13 88.40 88.43 710 88.27 88.40 88.24 708 88.29 88.81 88.48 706 88.44 88.56 88.52 704 88.62 88.70 88.83 702 88.56 88.63 88.60 700 88.61 88.61 88.54 698 88.66 88.75 88.76 696 88.47 88.86 88.62 694 88.68 88.70 88.47 692 88.57 89.19 88.73 690 88.50 88.69 88.75 688 88.65 88.90 88.80 686 88.66 88.96 88.85 684 88.70 89.15 88.95 682 88.72 88.99 88.86 680 89.01 89.25 88.91 678 88.95 89.22 89.20 676 88.91 89.13 89.15 674 88.95 89.27 89.27 672 88.93 89.26 89.14 670 89.08 89.00 89.00 668 89.27 89.32 89.40 666 89.14 89.33 89.20 664 89.18 89.22 89.32 662 89.20 89.31 89.23 660 89.24 89.40 89.42 658 88.95 89.28 89.58 656 89.34 89.52 89.36 654 89.42 89.44 89.57 652 89.36 89.49 89.37 650 89.43 89.40 89.50 648 89.45 89.73 89.45 646 89.62 89.66 89.62 644 89.51 89.72 89.54 642 89.52 89.52 89.66 640 89.60 89.76 89.67 638 89.80 89.83 89.78 636 89.65 89.81 89.91 634 89.46 89.69 89.73 632 89.59 89.78 89.81 630 89.70 89.75 89.93 628 89.66 89.92 89.87 626 89.68 89.87 89.76 624 89.82 89.94 89.74 622 90.08 89.69 89.84 620 89.84 89.99 89.92 618 89.83 90.01 89.83 616 89.66 89.87 89.87 614 89.95 89.89 89.88 612 89.82 90.08 89.92 610 89.93 89.98 89.95 608 90.03 89.89 90.06 606 89.72 90.14 90.11 604 89.90 90.27 90.12 602 90.05 90.06 89.96 600 89.92 90.14 90.19 598 90.09 90.30 90.05 596 90.12 90.23 90.00 594 90.02 90.34 89.91 592 90.09 90.19 90.15 590 90.02 90.20 90.11 588 90.02 90.41 90.31 586 90.05 90.11 90.25 584 90.14 90.24 90.28 582 90.07 90.54 90.28 580 90.13 90.38 90.18 578 90.08 90.50 90.36 576 90.25 90.48 90.26 574 90.17 90.33 90.31 572 90.12 90.36 90.42 570 90.21 90.44 90.29 568 90.30 90.46 90.55 566 90.12 90.49 90.30 564 90.35 90.56 90.32 562 90.32 90.52 90.43 560 90.47 90.60 90.22 558 90.44 90.57 90.37 556 90.33 90.55 90.66 554 90.46 90.54 90.31 552 90.28 90.67 90.41 550 90.35 90.58 90.54 548 90.23 90.72 90.20 546 90.21 90.69 90.46 544 90.54 90.73 90.59 542 90.45 90.62 90.46 540 90.37 90.82 90.73 538 90.37 90.66 90.58 536 90.45 90.68 90.63 534 90.66 90.81 90.66 532 90.65 90.83 90.75 530 90.32 90.60 90.81 528 90.50 90.62 90.63 526 90.59 90.60 90.65 524 90.61 90.75 90.52 522 90.51 90.71 90.49 520 90.59 90.80 90.61 518 90.44 90.74 90.68 516 90.79 90.70 90.81 514 90.73 90.66 90.83 512 90.64 90.86 90.72 510 90.57 90.91 90.78 508 90.68 90.81 90.71 506 90.80 90.79 90.89 504 90.71 90.91 90.80 502 90.58 90.90 90.87 500 90.80 90.94 90.90 498 90.64 90.95 90.82 496 90.70 90.72 91.10 494 90.67 90.87 90.69 492 90.80 90.82 90.79 490 90.80 90.73 90.66 488 90.75 91.07 91.08 486 90.85 90.86 90.94 484 90.62 91.02 90.89 482 90.76 91.17 90.77 480 90.90 90.99 90.86 478 90.87 91.03 90.69 476 90.69 91.10 90.83 474 90.72 91.16 91.12 472 90.74 91.30 90.95 470 90.99 91.02 91.28 468 90.92 91.14 91.02 466 90.85 91.20 91.08 464 90.55 90.75 90.73 462 91.04 91.02 91.12 460 90.99 90.98 90.96 458 90.82 90.81 90.79 456 90.64 91.32 91.02 454 90.91 91.10 91.24 452 90.64 91.12 91.39 450 91.05 91.06 90.88 448 91.04 91.44 91.19 446 90.94 90.95 91.43 444 90.66 90.99 91.25 442 90.98 90.76 91.03 440 90.60 91.56 91.26 438 90.98 90.95 91.01 436 91.14 91.35 91.32 434 91.21 91.29 91.07 432 90.85 90.92 90.94 430 91.13 90.83 91.07 428 90.86 91.32 91.32 426 91.44 90.90 91.30 424 90.75 91.25 91.02 422 90.26 91.61 91.12 420 90.99 91.09 91.38 418 91.00 91.37 91.19 416 90.69 91.45 91.61 414 90.54 90.50 90.56 412 91.09 91.67 91.41 410 90.87 91.57 90.91 408 91.48 91.11 90.80 406 90.95 91.42 91.00 404 90.70 91.42 90.63 402 90.91 91.36 90.97 400 90.71 91.60 92.65 398 90.86 91.73 91.40 396 91.11 90.76 91.22 394 90.98 91.15 91.49 392 91.71 91.23 91.78 390 90.15 91.64 91.45 388 90.95 91.73 91.57 386 90.54 92.11 91.64 384 90.65 90.37 91.36 382 90.39 90.54 91.61 380 91.76 90.19 91.99 1650 96.74 96.90 96.76 1640 96.77 96.92 96.78 1630 96.78 96.92 96.78 1620 96.77 96.92 96.80 1610 96.78 96.92 96.80 1600 96.77 96.94 96.81 1590 96.77 96.93 96.81 1580 96.78 96.92 96.78 1570 96.77 96.92 96.79 1560 96.74 96.90 96.78 1550 96.75 96.89 96.77 1540 96.73 96.88 96.76 1530 96.72 96.88 96.76 1520 96.72 96.86 96.75 1510 96.70 96.86 96.73 1500 96.68 96.84 96.72 1490 96.67 96.82 96.71 1480 96.65 96.79 96.68 1470 96.63 96.78 96.66 1460 96.61 96.76 96.66 1450 96.60 96.74 96.63 1440 96.56 96.72 96.62 1430 96.55 96.70 96.60 1420 96.53 96.69 96.58 1410 96.51 96.67 96.56 1400 96.49 96.64 96.54 1390 96.47 96.62 96.52 1380 96.46 96.60 96.50 1370 96.43 96.57 96.48 1360 96.40 96.55 96.45 1350 96.39 96.53 96.43 1340 96.36 96.51 96.40 1330 96.33 96.49 96.38 1320 96.30 96.45 96.35 1310 96.27 96.43 96.32 1300 96.24 96.40 96.30 1290 96.21 96.37 96.26 1280 96.18 96.34 96.23 1270 96.15 96.31 96.19 1260 96.12 96.28 96.16 1250 96.08 96.25 96.12 1240 96.04 96.20 96.08 1230 96.01 96.16 96.04 1220 95.95 96.11 95.99 1210 95.91 96.07 95.96 1200 95.84 96.02 95.90 1190 95.80 95.97 95.85 1180 95.76 95.91 95.79 1170 95.69 95.85 95.73 1160 95.62 95.79 95.68 1150 95.56 95.72 95.60 1140 95.48 95.65 95.54 1130 95.41 95.58 95.46 1120 95.32 95.49 95.36 1110 95.22 95.40 95.28 1100 95.13 95.30 95.19 1090 95.01 95.19 95.06 1080 94.90 95.07 94.96 1070 94.78 94.95 94.82 1060 94.62 94.81 94.69 1050 94.49 94.66 94.55 1040 94.32 94.49 94.39 1030 94.15 94.32 94.20 1020 93.95 94.13 93.98 1010 93.72 93.90 93.79 1000 93.47 93.66 93.55 990 93.23 93.40 93.27 980 92.92 93.09 92.99 970 92.58 92.76 92.65 960 92.23 92.38 92.27 950 91.79 91.97 91.86