# 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 2024-12-27 (876 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 88.57 88.87 88.72 998 89.51 89.13 87.92 996 88.96 89.13 88.94 994 89.19 88.74 89.39 992 89.56 89.18 88.55 990 89.02 88.39 89.21 988 89.42 89.37 89.80 986 88.33 88.86 88.50 984 89.72 89.69 88.41 982 88.85 89.24 90.02 980 89.10 88.53 89.29 978 89.25 89.13 88.88 976 88.92 89.00 88.19 974 88.61 88.74 88.03 972 88.08 88.93 88.48 970 88.90 88.77 88.77 968 88.21 88.72 88.03 966 88.60 88.75 88.21 964 89.00 88.12 88.09 962 88.39 88.16 88.46 960 88.19 88.77 88.99 958 88.01 88.00 87.76 956 87.80 87.99 88.42 954 88.23 88.29 88.36 952 88.47 87.97 87.82 950 87.25 88.25 87.85 948 87.19 87.56 87.61 946 87.73 87.56 87.42 944 87.82 87.59 87.66 942 87.39 86.96 87.93 940 87.39 87.40 88.08 938 87.19 87.20 87.25 936 87.09 86.63 88.09 934 87.01 87.29 87.11 932 87.26 86.59 86.97 930 87.01 86.63 86.48 928 86.42 86.80 87.08 926 86.59 86.51 87.04 924 86.55 86.63 86.51 922 86.42 86.90 86.25 920 86.44 86.44 86.00 918 86.36 85.73 86.39 916 86.08 85.83 85.81 914 85.83 85.50 86.07 912 86.15 85.81 85.79 910 85.31 85.45 85.47 908 85.77 85.52 85.41 906 85.67 85.27 85.40 904 85.47 85.05 85.04 902 84.86 85.06 85.20 900 84.90 84.93 84.94 898 84.72 84.81 84.83 896 85.06 84.53 84.65 894 84.40 84.48 84.38 892 84.25 84.60 84.43 890 84.43 84.10 84.60 888 84.35 84.20 84.28 886 83.39 84.27 84.22 884 83.70 83.69 83.66 882 83.75 83.57 83.31 880 83.50 83.44 83.56 878 83.73 83.15 83.48 876 83.25 83.05 83.22 874 83.16 83.26 82.67 872 83.11 83.20 82.69 870 82.76 82.96 82.72 868 83.05 82.64 82.41 866 82.73 82.66 82.59 864 82.47 82.19 82.85 862 82.33 82.27 82.37 860 82.20 81.80 82.21 858 82.17 81.59 82.04 856 81.84 81.79 81.44 854 81.65 81.44 81.41 852 81.92 81.63 81.48 850 81.69 81.19 81.53 848 81.35 81.40 81.50 846 80.92 81.38 81.32 844 81.20 80.91 81.26 842 81.07 81.12 81.08 840 81.17 81.23 80.90 838 80.99 81.50 80.77 836 80.99 80.62 81.28 834 80.96 81.38 80.58 832 81.43 81.02 80.81 830 80.78 80.54 80.61 828 81.07 81.59 81.13 826 81.13 81.10 80.94 824 80.87 80.71 80.92 822 80.47 80.87 80.95 820 80.68 80.73 80.76 818 81.20 80.80 80.61 816 81.14 80.76 81.24 814 80.92 80.93 80.59 812 81.02 80.92 80.83 810 81.05 80.99 80.95 808 81.10 80.78 81.22 806 81.70 81.13 81.25 804 81.71 81.32 81.18 802 81.41 81.42 81.26 800 81.47 81.31 81.56 798 81.28 81.31 81.20 796 81.58 81.82 81.15 794 81.33 81.41 81.78 792 81.32 81.65 81.92 790 81.70 81.93 81.93 788 81.84 81.66 82.13 786 81.88 81.89 81.80 784 81.84 82.00 82.11 782 82.02 81.76 81.91 780 82.33 82.12 81.95 778 82.29 82.31 82.05 776 82.23 82.21 82.28 774 82.49 82.42 82.18 772 82.57 82.38 82.48 770 82.27 82.40 82.42 768 82.22 82.61 82.34 766 82.74 82.41 82.47 764 82.89 82.55 82.64 762 82.57 82.59 82.60 760 82.91 82.72 82.90 758 82.82 82.92 82.92 756 83.00 82.99 83.01 754 83.04 82.99 83.15 752 83.34 82.87 82.92 750 83.26 83.03 83.12 748 83.27 83.17 83.34 746 83.28 83.29 83.22 744 83.69 83.36 83.14 742 83.46 83.25 83.50 740 83.52 83.31 83.46 738 83.35 83.58 83.41 736 83.57 83.41 83.54 734 83.58 83.31 83.50 732 83.85 83.56 83.51 730 83.78 83.85 83.56 728 83.63 83.59 83.69 726 83.90 83.79 83.73 724 83.99 83.65 83.83 722 83.83 83.75 83.76 720 83.98 83.93 83.62 718 84.01 83.76 83.98 716 83.88 83.99 84.14 714 84.25 83.97 83.94 712 84.15 84.03 83.90 710 84.21 84.00 84.01 708 84.36 84.04 83.95 706 84.45 84.12 84.14 704 84.23 84.31 84.21 702 84.31 84.15 84.28 700 84.38 84.22 84.23 698 84.26 84.27 84.21 696 84.46 84.36 84.28 694 84.41 84.27 84.48 692 84.47 84.52 84.26 690 84.25 84.37 84.58 688 84.60 84.41 84.32 686 84.66 84.23 84.57 684 84.40 84.55 84.40 682 84.51 84.54 84.52 680 84.56 84.69 84.59 678 84.91 84.44 84.81 676 84.80 84.61 84.65 674 84.68 84.46 84.58 672 84.95 84.59 84.37 670 84.86 84.65 84.65 668 84.76 84.77 84.94 666 84.94 84.83 84.84 664 85.29 84.80 84.86 662 84.86 84.57 84.95 660 84.91 84.62 84.74 658 84.92 84.88 84.97 656 85.09 84.88 84.94 654 84.99 84.83 84.82 652 85.17 85.04 85.07 650 85.25 84.75 84.98 648 85.06 85.02 84.99 646 85.15 85.02 84.85 644 84.98 84.95 85.17 642 85.05 84.98 84.81 640 85.00 85.09 84.91 638 85.08 85.14 84.91 636 85.15 84.97 85.14 634 85.36 85.10 85.23 632 85.28 85.08 85.02 630 85.39 85.13 85.19 628 85.29 85.01 85.09 626 85.24 85.05 85.10 624 85.31 85.09 85.32 622 85.41 85.16 85.19 620 85.27 85.11 85.20 618 85.16 85.06 85.45 616 85.40 85.07 85.21 614 85.48 84.98 85.33 612 85.31 85.21 85.37 610 85.33 85.36 85.17 608 85.31 85.29 85.15 606 85.45 85.20 85.47 604 85.40 85.14 85.32 602 85.35 85.21 85.52 600 85.34 85.23 85.17 598 85.47 85.16 85.35 596 85.37 85.31 85.34 594 85.47 85.13 85.30 592 85.29 85.33 85.26 590 85.37 85.31 85.24 588 85.59 85.42 85.20 586 85.35 85.23 85.48 584 85.44 85.37 85.24 582 85.61 85.36 85.26 580 85.34 85.45 85.28 578 85.40 85.46 85.33 576 85.50 85.25 85.34 574 85.66 85.32 85.35 572 85.39 85.30 85.18 570 85.60 85.36 85.44 568 85.32 85.11 85.32 566 85.55 85.39 85.56 564 85.39 85.19 85.56 562 85.66 85.38 85.47 560 85.61 85.22 85.36 558 85.68 85.47 85.25 556 85.46 85.14 85.53 554 85.46 85.20 85.52 552 85.59 85.17 85.56 550 85.45 85.24 85.42 548 85.58 85.26 85.29 546 85.39 85.22 85.32 544 85.56 85.22 85.53 542 85.63 85.36 85.23 540 85.52 85.17 85.60 538 85.61 85.27 85.33 536 85.49 85.26 85.44 534 85.37 85.29 85.40 532 85.49 85.40 85.29 530 85.64 85.29 85.25 528 85.33 85.11 85.50 526 85.40 85.42 85.71 524 85.65 85.24 85.34 522 85.58 85.33 85.50 520 85.65 85.15 85.40 518 85.48 85.36 85.23 516 85.41 85.47 85.26 514 85.58 85.25 85.42 512 85.56 85.14 85.23 510 85.39 85.17 85.43 508 85.53 85.07 85.23 506 85.40 85.39 85.42 504 85.46 85.25 85.40 502 85.39 85.15 85.32 500 85.60 85.14 85.20 498 85.45 84.96 85.20 496 85.58 85.16 85.25 494 85.28 85.17 85.19 492 85.57 85.15 85.27 490 85.50 85.21 85.42 488 85.47 85.00 85.28 486 85.67 85.00 85.30 484 85.45 84.98 85.20 482 85.48 84.98 85.20 480 85.29 85.16 85.43 478 85.38 85.17 85.12 476 85.13 85.13 85.40 474 85.39 85.17 85.20 472 85.05 85.20 85.01 470 85.46 84.93 85.20 468 85.72 84.81 85.33 466 85.40 84.80 85.12 464 85.36 84.82 85.00 462 85.47 84.94 85.21 460 85.24 84.81 85.31 458 85.18 84.83 85.04 456 85.32 84.59 85.04 454 85.10 84.86 84.77 452 85.22 85.01 85.12 450 85.07 84.81 84.78 448 85.55 84.83 85.15 446 85.16 84.74 84.66 444 85.18 84.79 85.25 442 85.21 84.95 84.98 440 85.45 84.74 84.89 438 85.10 84.68 84.77 436 84.64 84.75 85.06 434 84.99 84.80 84.87 432 85.11 84.48 85.25 430 85.22 84.50 84.59 428 85.02 84.82 84.46 426 85.02 84.62 84.81 424 84.55 84.57 84.68 422 85.23 84.51 84.84 420 85.20 84.47 84.68 418 84.59 84.39 85.09 416 85.11 84.58 84.29 414 85.09 84.04 84.32 412 84.75 84.23 84.71 410 84.38 84.65 84.40 408 84.79 84.02 84.64 406 84.44 84.14 84.92 404 84.61 84.43 85.04 402 84.29 85.24 84.77 400 84.79 84.12 84.33 398 84.15 84.22 84.08 396 84.42 83.84 83.79 394 84.07 83.80 84.05 392 84.48 83.91 84.96 390 84.12 83.99 83.82 388 83.91 83.73 84.32 386 84.09 83.19 84.21 384 83.44 83.80 83.64 382 83.25 83.77 83.82 380 83.92 82.95 83.60 1650 93.48 93.44 93.60 1640 93.48 93.45 93.60 1630 93.49 93.46 93.62 1620 93.49 93.45 93.61 1610 93.51 93.44 93.62 1600 93.50 93.45 93.61 1590 93.49 93.44 93.60 1580 93.48 93.44 93.59 1570 93.47 93.42 93.58 1560 93.48 93.41 93.58 1550 93.46 93.40 93.56 1540 93.44 93.39 93.55 1530 93.44 93.37 93.54 1520 93.42 93.35 93.52 1510 93.41 93.33 93.51 1500 93.39 93.32 93.49 1490 93.38 93.30 93.48 1480 93.36 93.28 93.46 1470 93.35 93.25 93.43 1460 93.33 93.23 93.41 1450 93.30 93.21 93.40 1440 93.29 93.19 93.38 1430 93.25 93.17 93.35 1420 93.24 93.14 93.33 1410 93.22 93.12 93.31 1400 93.19 93.09 93.28 1390 93.16 93.07 93.25 1380 93.15 93.03 93.24 1370 93.13 93.01 93.20 1360 93.11 92.98 93.19 1350 93.08 92.95 93.15 1340 93.05 92.92 93.11 1330 93.02 92.90 93.09 1320 92.99 92.86 93.05 1310 92.95 92.82 93.02 1300 92.92 92.78 92.98 1290 92.89 92.75 92.94 1280 92.85 92.71 92.91 1270 92.82 92.67 92.86 1260 92.78 92.64 92.83 1250 92.73 92.58 92.78 1240 92.69 92.54 92.73 1230 92.65 92.51 92.69 1220 92.59 92.44 92.64 1210 92.54 92.39 92.58 1200 92.49 92.34 92.53 1190 92.43 92.27 92.47 1180 92.37 92.21 92.39 1170 92.30 92.14 92.33 1160 92.23 92.07 92.25 1150 92.16 91.99 92.18 1140 92.09 91.92 92.11 1130 91.99 91.83 92.03 1120 91.91 91.73 91.92 1110 91.82 91.64 91.81 1100 91.71 91.53 91.71 1090 91.59 91.43 91.60 1080 91.47 91.29 91.47 1070 91.33 91.16 91.34 1060 91.20 91.01 91.19 1050 91.04 90.84 91.02 1040 90.86 90.67 90.86 1030 90.67 90.49 90.66 1020 90.47 90.28 90.45 1010 90.24 90.05 90.22 1000 89.97 89.78 89.96 990 89.70 89.50 89.68 980 89.41 89.20 89.36 970 89.04 88.86 89.01 960 88.66 88.49 88.62 950 88.20 88.04 88.19