# 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 2024-05-24 (659 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 89.81 89.59 89.39 998 90.22 90.15 90.26 996 90.41 89.80 90.01 994 89.48 89.97 89.49 992 90.50 90.05 89.23 990 89.75 90.31 90.80 988 90.57 90.61 89.99 986 90.33 89.69 90.06 984 90.44 89.70 90.64 982 90.21 89.70 90.43 980 89.60 90.57 89.04 978 89.82 90.04 89.57 976 89.82 90.18 90.49 974 89.87 89.61 89.29 972 89.66 89.46 89.69 970 89.61 89.26 89.34 968 89.61 90.32 89.21 966 90.11 89.77 89.49 964 90.25 90.08 89.38 962 89.98 87.99 89.33 960 89.60 89.52 88.84 958 88.49 89.57 89.42 956 89.14 89.53 89.03 954 89.09 89.29 88.91 952 88.25 89.50 89.29 950 89.03 89.11 88.57 948 88.92 88.46 88.88 946 88.99 88.82 89.25 944 88.02 88.46 88.78 942 88.27 88.22 88.35 940 88.32 88.25 87.87 938 88.63 88.90 88.18 936 88.10 88.90 88.09 934 88.36 88.05 87.65 932 88.31 88.11 87.87 930 87.95 88.04 88.21 928 87.93 88.00 87.50 926 88.48 87.72 87.70 924 87.23 87.56 87.89 922 87.29 87.82 87.39 920 87.50 87.69 87.32 918 87.76 87.55 87.57 916 86.92 87.13 87.02 914 87.10 87.05 86.72 912 87.18 86.77 86.34 910 87.22 86.57 87.23 908 86.24 86.54 86.83 906 86.50 86.05 86.76 904 86.47 86.60 86.44 902 85.59 86.28 86.26 900 86.29 86.06 86.09 898 86.12 85.77 86.36 896 85.45 86.02 85.71 894 85.70 85.88 85.25 892 85.80 85.42 85.73 890 85.40 85.76 85.55 888 85.35 85.52 85.17 886 84.97 85.01 85.11 884 84.97 84.75 84.97 882 84.73 84.81 84.86 880 84.65 85.00 84.59 878 84.56 84.69 84.60 876 84.25 84.11 83.85 874 84.12 84.23 84.09 872 83.95 84.14 84.06 870 84.27 84.12 83.82 868 83.61 83.89 83.94 866 83.72 83.85 83.67 864 83.41 83.95 83.82 862 83.33 83.31 83.28 860 83.11 83.35 83.03 858 83.27 83.48 83.06 856 82.82 82.94 83.11 854 82.98 83.07 83.06 852 82.74 82.43 83.02 850 82.86 82.71 82.61 848 82.64 82.99 82.54 846 82.52 82.70 82.27 844 82.32 82.56 82.46 842 82.08 82.50 82.47 840 82.52 82.02 82.51 838 82.32 82.02 82.12 836 82.16 82.36 82.41 834 82.21 82.34 81.96 832 82.01 82.32 82.19 830 82.24 82.02 82.05 828 81.53 82.63 82.44 826 82.24 81.93 82.62 824 82.34 82.13 82.37 822 82.06 82.36 82.43 820 81.99 82.29 82.24 818 82.51 82.01 82.43 816 82.24 82.18 82.25 814 82.03 82.87 82.16 812 82.34 82.69 81.90 810 82.69 82.28 82.14 808 82.50 82.88 82.20 806 82.27 82.23 82.34 804 82.68 82.64 82.77 802 82.31 82.87 82.42 800 82.59 82.46 82.73 798 82.60 82.59 82.77 796 82.79 82.85 82.92 794 82.51 82.98 82.91 792 82.91 82.80 83.18 790 83.16 82.82 82.97 788 82.98 83.40 83.03 786 83.14 83.48 83.02 784 83.37 83.29 83.47 782 83.38 83.14 83.54 780 83.33 83.53 83.47 778 83.50 83.79 83.30 776 83.54 83.82 83.38 774 83.83 83.71 83.57 772 83.93 83.77 83.86 770 83.51 83.69 83.80 768 83.54 83.71 83.91 766 84.02 84.06 83.98 764 84.21 84.32 83.67 762 83.91 84.26 84.03 760 84.20 84.39 83.94 758 84.40 84.53 84.39 756 84.28 84.49 84.56 754 84.27 84.46 84.41 752 84.30 84.51 84.28 750 84.32 84.69 84.70 748 84.63 84.59 84.60 746 84.65 84.67 84.40 744 84.74 84.48 85.13 742 84.99 84.60 84.83 740 84.98 84.79 85.08 738 84.76 84.92 84.89 736 85.12 85.00 85.15 734 85.05 85.03 85.20 732 85.24 85.16 84.96 730 85.30 85.23 85.24 728 85.24 85.29 85.26 726 85.28 85.21 85.38 724 85.13 85.18 85.54 722 85.24 85.39 85.15 720 85.50 85.46 85.63 718 85.64 85.21 85.49 716 85.61 85.44 85.39 714 85.29 85.41 85.55 712 85.58 85.66 85.43 710 85.77 85.87 85.56 708 85.66 85.63 85.84 706 85.76 85.53 85.82 704 85.50 85.90 85.73 702 85.73 85.76 85.70 700 85.82 85.82 85.84 698 85.94 85.75 85.88 696 85.88 85.95 85.98 694 86.05 85.83 86.07 692 86.10 85.92 86.12 690 86.15 86.12 86.09 688 86.06 86.16 86.03 686 86.07 86.08 86.02 684 86.41 85.97 86.09 682 86.16 86.20 86.07 680 86.27 86.09 86.09 678 86.31 86.16 86.21 676 86.10 86.45 86.16 674 86.37 86.55 86.42 672 86.25 86.31 86.28 670 86.43 86.15 86.25 668 86.47 86.26 86.40 666 86.34 86.62 86.26 664 86.36 86.44 86.41 662 86.54 86.50 86.49 660 86.58 86.58 86.33 658 86.60 86.51 86.65 656 86.53 86.59 86.62 654 86.53 86.62 86.39 652 86.69 86.45 86.52 650 86.70 86.58 86.61 648 86.76 86.65 86.77 646 86.79 86.68 86.87 644 86.70 86.80 86.81 642 86.77 86.83 86.78 640 86.79 86.63 86.74 638 86.79 86.66 87.07 636 86.64 86.92 86.70 634 86.97 86.84 86.93 632 86.99 86.80 86.76 630 86.91 86.79 87.01 628 86.80 86.84 86.90 626 86.73 86.92 87.07 624 86.84 87.03 86.94 622 86.84 86.80 86.88 620 87.03 86.86 87.08 618 86.88 87.05 87.17 616 86.85 87.03 87.10 614 87.05 86.87 86.95 612 86.98 87.10 86.99 610 87.23 87.04 87.12 608 87.06 87.00 87.17 606 87.05 87.04 87.09 604 87.00 86.99 87.08 602 87.10 87.07 87.19 600 87.07 86.94 87.34 598 87.14 87.20 87.28 596 87.14 87.15 87.31 594 87.13 87.12 87.11 592 87.08 87.01 87.17 590 87.22 87.19 87.32 588 87.18 87.16 87.43 586 87.18 87.07 87.35 584 87.28 87.17 87.50 582 87.34 87.04 87.28 580 87.25 87.45 87.25 578 87.20 87.04 87.36 576 87.24 87.24 87.23 574 87.16 87.21 87.40 572 87.32 87.15 87.24 570 87.30 87.12 87.42 568 87.38 87.20 87.39 566 87.03 87.12 87.36 564 87.14 87.32 87.03 562 87.32 87.15 87.38 560 87.28 87.22 87.36 558 87.07 87.24 87.34 556 87.36 87.29 87.45 554 87.51 87.27 87.47 552 87.23 87.20 87.41 550 87.36 87.34 87.41 548 87.21 87.28 87.31 546 87.33 87.21 87.38 544 87.49 87.33 87.48 542 87.50 87.36 87.29 540 87.44 87.33 87.31 538 87.28 87.43 87.53 536 87.47 87.23 87.42 534 87.51 87.29 87.53 532 87.47 87.43 87.30 530 87.44 87.18 87.64 528 87.27 87.50 87.52 526 87.50 87.25 87.62 524 87.28 87.36 87.40 522 87.43 87.38 87.26 520 87.54 87.33 87.42 518 87.40 87.22 87.38 516 87.42 87.62 87.50 514 87.29 87.22 87.45 512 87.42 87.23 87.54 510 87.61 87.14 87.71 508 87.55 87.04 87.37 506 87.41 87.37 87.61 504 87.55 87.35 87.33 502 87.48 87.27 87.34 500 87.40 87.32 87.48 498 87.48 87.42 87.33 496 87.65 87.32 87.40 494 87.47 87.37 87.58 492 87.30 87.21 87.38 490 87.52 87.29 87.37 488 87.61 87.34 87.24 486 87.81 87.30 87.55 484 87.27 87.14 87.63 482 87.35 87.56 87.64 480 87.53 87.27 87.59 478 87.58 87.49 87.59 476 87.61 87.23 87.45 474 87.56 87.22 87.35 472 87.72 87.49 87.57 470 87.41 87.38 87.17 468 87.44 87.22 87.64 466 87.45 87.29 87.57 464 87.34 86.95 87.60 462 87.32 87.23 87.65 460 87.38 87.55 87.43 458 87.50 87.29 87.37 456 87.43 87.63 87.07 454 87.28 87.15 87.51 452 87.43 87.05 87.46 450 87.43 87.22 87.63 448 87.09 87.30 87.46 446 87.20 87.05 87.35 444 87.42 87.08 87.99 442 87.62 87.21 87.45 440 87.44 87.02 87.39 438 87.61 87.05 87.67 436 87.44 87.14 87.37 434 87.44 87.45 87.33 432 87.75 87.40 87.36 430 87.46 87.23 87.28 428 87.44 87.11 87.08 426 87.13 87.10 87.61 424 87.67 87.19 86.92 422 87.65 87.37 87.28 420 87.68 86.92 86.97 418 87.60 87.04 87.29 416 87.50 87.24 87.47 414 87.38 87.49 87.07 412 87.41 87.56 87.59 410 87.14 87.46 87.06 408 87.56 86.43 87.78 406 87.32 87.20 87.43 404 87.29 86.26 87.47 402 87.49 87.13 87.24 400 87.35 86.47 86.68 398 86.93 86.71 87.22 396 87.70 87.21 87.23 394 86.82 86.20 87.16 392 87.38 87.03 87.47 390 87.62 86.72 86.65 388 87.22 86.64 87.50 386 87.05 86.65 87.37 384 88.04 86.66 87.28 382 87.23 85.92 87.30 380 86.78 86.54 86.67 1650 94.44 94.41 94.38 1640 94.45 94.43 94.42 1630 94.44 94.45 94.40 1620 94.45 94.44 94.42 1610 94.45 94.45 94.42 1600 94.45 94.43 94.43 1590 94.44 94.44 94.41 1580 94.43 94.44 94.40 1570 94.43 94.43 94.40 1560 94.41 94.43 94.39 1550 94.40 94.41 94.39 1540 94.37 94.41 94.36 1530 94.38 94.39 94.36 1520 94.35 94.38 94.36 1510 94.35 94.36 94.34 1500 94.31 94.37 94.32 1490 94.31 94.35 94.32 1480 94.27 94.33 94.29 1470 94.26 94.31 94.29 1460 94.23 94.29 94.26 1450 94.21 94.28 94.25 1440 94.18 94.26 94.23 1430 94.17 94.24 94.20 1420 94.15 94.23 94.19 1410 94.11 94.21 94.16 1400 94.11 94.19 94.15 1390 94.08 94.16 94.12 1380 94.06 94.14 94.09 1370 94.03 94.12 94.07 1360 94.00 94.09 94.05 1350 93.98 94.07 94.02 1340 93.94 94.03 94.00 1330 93.91 94.01 93.96 1320 93.88 93.99 93.93 1310 93.85 93.95 93.90 1300 93.82 93.92 93.88 1290 93.79 93.89 93.83 1280 93.75 93.85 93.80 1270 93.72 93.82 93.76 1260 93.70 93.78 93.74 1250 93.65 93.73 93.69 1240 93.60 93.69 93.64 1230 93.57 93.64 93.59 1220 93.52 93.59 93.55 1210 93.47 93.54 93.50 1200 93.43 93.49 93.43 1190 93.37 93.42 93.38 1180 93.30 93.36 93.32 1170 93.24 93.30 93.25 1160 93.18 93.23 93.18 1150 93.10 93.16 93.13 1140 93.02 93.09 93.03 1130 92.94 93.00 92.95 1120 92.86 92.92 92.86 1110 92.75 92.80 92.77 1100 92.66 92.72 92.67 1090 92.55 92.61 92.56 1080 92.42 92.49 92.44 1070 92.27 92.35 92.31 1060 92.13 92.21 92.17 1050 91.98 92.06 92.01 1040 91.80 91.88 91.84 1030 91.62 91.70 91.66 1020 91.41 91.48 91.45 1010 91.18 91.28 91.23 1000 90.94 91.02 90.97 990 90.64 90.74 90.71 980 90.34 90.44 90.42 970 90.01 90.12 90.05 960 89.62 89.72 89.68 950 89.21 89.30 89.27