# 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 2022-08-08 (4 days after) # Measured five 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 Pos.3 #4 Pos.3 #5 1000 92.34 93.37 93.00 93.07 93.29 998 92.96 93.32 94.13 93.68 93.53 996 93.66 92.93 92.70 93.46 94.27 994 92.75 92.55 93.50 92.87 93.62 992 92.95 92.48 93.67 92.89 92.83 990 93.56 92.62 94.24 93.06 93.77 988 93.43 92.24 93.53 92.73 92.40 986 93.09 93.06 93.77 93.19 93.08 984 93.90 93.37 93.48 93.05 92.72 982 93.32 92.90 93.64 92.52 93.45 980 93.36 93.76 93.17 92.65 92.89 978 92.40 92.10 92.74 94.07 92.47 976 92.31 92.90 93.49 92.97 92.11 974 93.13 92.36 92.97 93.32 92.87 972 92.61 92.45 93.38 92.98 93.23 970 92.49 92.60 92.28 92.81 92.42 968 91.97 92.43 92.94 92.07 92.35 966 92.24 93.10 92.73 92.58 93.00 964 91.91 92.65 93.03 92.06 92.80 962 92.88 92.47 91.67 92.16 92.19 960 92.88 92.12 92.80 91.93 92.42 958 92.31 91.97 92.19 92.34 92.47 956 92.33 92.56 92.26 91.94 92.21 954 91.65 91.88 92.61 92.43 92.48 952 92.09 92.00 92.66 91.36 92.74 950 91.70 92.24 92.10 92.19 91.69 948 92.11 92.09 91.78 92.15 92.15 946 91.69 91.32 91.80 91.76 91.53 944 91.80 91.74 91.53 91.70 91.72 942 91.87 91.64 91.64 90.75 91.49 940 91.02 91.58 91.56 90.49 91.38 938 92.13 91.44 91.98 91.12 91.53 936 91.03 91.22 91.39 90.73 91.60 934 91.48 91.11 91.40 91.11 91.49 932 90.96 91.00 91.25 90.89 91.02 930 90.78 90.89 91.34 91.04 90.75 928 91.21 90.60 91.07 90.50 90.96 926 90.70 91.05 90.53 90.85 90.64 924 90.93 91.21 91.25 90.51 90.73 922 90.50 90.79 91.15 90.44 90.42 920 90.05 90.19 90.45 90.47 90.11 918 90.71 90.64 90.67 90.71 90.41 916 90.06 90.37 90.37 90.24 90.23 914 90.01 90.68 90.71 90.24 90.38 912 90.27 90.25 90.19 89.70 90.09 910 89.79 89.85 90.45 90.11 89.69 908 89.11 89.66 89.90 89.70 89.91 906 89.96 89.86 89.67 89.69 89.90 904 89.72 90.14 89.80 89.25 90.17 902 89.62 89.04 89.82 89.42 89.13 900 89.26 89.09 89.25 89.05 89.66 898 88.74 89.34 89.25 88.82 89.04 896 88.86 88.96 89.57 89.36 88.78 894 88.67 89.02 88.94 88.65 89.13 892 88.56 88.43 88.79 88.67 88.64 890 89.04 88.72 88.39 88.65 88.23 888 88.37 88.64 88.35 88.18 88.48 886 88.41 88.34 88.47 88.39 88.28 884 87.96 87.87 88.09 88.46 88.33 882 88.04 87.95 88.20 88.04 87.93 880 87.61 88.41 88.18 87.79 88.06 878 87.63 87.05 87.96 87.51 87.54 876 87.02 87.59 87.88 87.51 87.40 874 87.55 87.18 87.67 87.32 87.48 872 87.35 87.41 87.59 87.62 87.10 870 87.05 87.15 87.40 87.17 87.43 868 86.51 86.95 87.48 87.04 86.86 866 86.88 86.93 87.06 86.47 86.59 864 86.46 86.85 86.83 86.89 87.29 862 86.66 86.81 86.90 86.24 86.75 860 86.41 86.70 86.20 86.46 86.38 858 86.71 86.55 86.92 86.27 86.60 856 86.16 86.00 86.39 86.23 86.48 854 86.20 86.14 86.28 86.15 86.22 852 86.07 86.13 85.93 86.03 86.11 850 85.69 85.76 86.16 85.68 86.07 848 85.97 86.01 85.73 85.78 85.99 846 85.87 85.97 85.98 85.62 85.55 844 86.01 85.60 86.23 85.60 85.87 842 85.32 85.64 85.54 85.64 85.94 840 85.44 85.35 85.79 85.53 85.69 838 85.66 85.53 85.62 85.49 85.52 836 85.27 85.78 85.59 85.61 85.62 834 85.24 86.02 85.80 85.35 85.81 832 85.11 85.26 85.55 85.37 85.46 830 85.20 85.69 85.44 85.06 85.43 828 85.27 85.37 85.56 85.95 85.42 826 85.44 85.75 85.40 85.21 85.68 824 85.32 85.31 85.11 85.29 84.93 822 85.57 85.50 85.21 84.98 85.38 820 85.45 85.47 85.99 85.46 85.64 818 85.53 85.31 85.87 85.39 85.66 816 85.21 85.36 85.78 85.99 85.68 814 85.75 85.54 85.72 85.81 85.44 812 85.66 85.39 85.68 85.64 85.80 810 85.39 85.69 85.78 85.37 85.78 808 85.23 85.87 86.02 85.66 85.85 806 85.80 85.49 86.26 85.27 85.63 804 86.06 85.65 85.97 85.70 85.84 802 85.93 85.72 86.02 85.68 85.52 800 85.74 85.96 86.11 86.08 85.98 798 85.90 85.71 86.41 86.15 86.13 796 86.10 86.13 85.91 85.85 85.60 794 86.03 86.45 86.17 86.56 86.17 792 86.55 86.32 86.67 86.13 86.00 790 86.14 86.37 86.50 86.11 86.13 788 86.29 86.28 86.33 86.32 86.54 786 86.30 86.55 86.66 86.47 86.33 784 86.53 86.37 86.49 86.48 86.77 782 86.54 86.21 86.73 86.58 86.69 780 86.39 86.58 86.89 86.94 86.88 778 86.51 86.44 87.04 86.67 86.74 776 86.60 86.89 86.80 86.78 86.90 774 87.03 86.84 86.88 86.75 86.75 772 86.88 86.84 87.06 86.83 87.13 770 86.95 87.01 87.06 87.50 86.87 768 87.06 87.09 87.36 86.80 87.21 766 87.12 87.24 87.11 87.12 87.24 764 87.05 87.54 87.52 87.07 87.36 762 87.01 87.50 87.69 87.55 87.24 760 87.38 87.41 87.40 87.18 87.55 758 87.30 87.27 87.62 87.89 87.51 756 87.54 87.61 87.74 87.64 87.56 754 87.51 87.74 87.89 87.44 87.86 752 87.14 87.53 87.66 87.42 87.62 750 87.44 87.55 87.88 87.82 87.93 748 88.08 87.53 88.11 87.96 87.95 746 87.82 87.51 88.05 88.03 88.15 744 87.88 88.00 87.90 88.01 87.92 742 87.99 87.83 88.29 88.09 88.18 740 88.04 88.05 88.14 88.09 88.22 738 88.25 88.04 88.63 88.30 88.20 736 87.98 88.01 88.31 88.12 88.30 734 88.13 88.39 88.39 88.14 88.18 732 87.95 88.12 88.44 88.53 88.54 730 88.12 88.21 88.39 88.61 88.28 728 88.61 88.71 88.21 88.51 88.64 726 88.24 88.57 88.42 88.55 88.46 724 88.59 88.37 88.59 88.55 88.49 722 88.60 88.68 88.61 88.28 88.82 720 88.71 88.92 88.84 88.75 88.53 718 88.66 88.85 88.88 88.78 88.89 716 88.67 88.78 88.79 88.96 88.90 714 88.52 88.93 88.77 88.90 88.71 712 88.76 88.94 88.82 88.83 88.78 710 88.71 88.81 88.98 88.86 88.94 708 88.78 89.01 88.86 88.94 89.12 706 89.07 89.03 89.10 88.97 89.21 704 88.87 89.14 89.11 89.00 89.15 702 89.00 89.17 88.85 89.28 88.97 700 88.98 89.09 89.13 88.96 88.94 698 89.03 89.19 89.05 89.13 89.09 696 89.17 89.26 89.19 89.10 89.08 694 89.07 89.23 89.30 89.38 89.32 692 89.18 89.19 89.23 89.24 89.35 690 89.13 89.34 89.24 89.30 89.32 688 89.47 89.49 89.59 88.99 89.47 686 89.42 89.49 89.67 89.03 89.41 684 89.50 89.37 89.61 89.42 89.46 682 89.28 89.23 89.61 89.50 89.38 680 89.28 89.54 89.76 89.40 89.59 678 89.32 89.68 89.74 89.38 89.26 676 89.34 89.42 89.57 89.53 89.67 674 89.34 89.57 89.74 89.72 89.57 672 89.51 89.72 89.58 89.63 90.01 670 89.65 89.71 89.70 89.47 89.57 668 89.65 89.73 89.71 89.75 89.65 666 89.74 89.76 89.94 89.86 89.67 664 89.70 89.88 89.77 89.89 89.60 662 89.70 90.00 89.89 89.73 89.76 660 89.61 89.84 89.93 89.81 89.70 658 89.67 89.92 90.01 89.85 89.83 656 89.90 89.68 89.93 89.76 89.86 654 89.94 90.04 90.15 89.99 89.87 652 89.59 90.07 90.09 89.89 90.14 650 89.86 90.05 90.09 89.91 90.03 648 89.92 90.05 90.13 90.13 90.12 646 90.00 89.98 90.12 90.18 90.04 644 89.98 90.03 90.26 90.21 90.10 642 89.99 90.21 90.23 90.04 90.00 640 90.00 90.32 90.19 90.03 90.26 638 89.91 90.24 90.17 90.16 90.10 636 90.15 90.07 90.41 89.99 90.35 634 90.28 90.14 90.45 90.32 90.30 632 89.97 90.20 90.44 90.18 90.24 630 90.07 90.11 90.61 90.29 90.37 628 90.18 90.41 90.45 90.09 90.22 626 90.21 90.43 90.39 90.27 90.49 624 90.20 90.32 90.34 90.26 90.36 622 90.23 90.44 90.47 90.45 90.48 620 90.09 90.25 90.47 90.19 90.30 618 90.33 90.47 90.46 90.32 90.26 616 90.19 90.50 90.48 90.44 90.38 614 90.35 90.33 90.46 90.55 90.46 612 90.41 90.47 90.44 90.52 90.45 610 90.33 90.65 90.59 90.49 90.37 608 90.19 90.53 90.40 90.46 90.31 606 90.33 90.70 90.54 90.37 90.66 604 90.48 90.59 90.47 90.49 90.74 602 90.40 90.75 90.60 90.57 90.51 600 90.39 90.68 90.71 90.39 90.53 598 90.41 90.58 90.52 90.60 90.63 596 90.41 90.79 90.53 90.67 90.62 594 90.54 90.88 90.50 90.79 90.78 592 90.50 90.57 90.80 90.72 90.73 590 90.39 90.74 90.77 90.59 90.69 588 90.65 90.64 90.88 90.77 90.77 586 90.65 90.63 90.79 90.54 90.74 584 90.83 90.89 91.07 90.73 90.74 582 90.76 90.86 90.80 90.81 90.78 580 90.68 90.95 90.96 90.85 90.77 578 90.58 90.89 90.90 90.84 91.06 576 90.71 90.84 90.87 90.92 90.94 574 90.52 90.87 90.89 90.81 90.94 572 90.76 90.94 90.92 90.73 90.68 570 90.73 90.94 90.88 90.76 90.68 568 90.58 90.90 90.85 90.87 90.72 566 90.65 91.11 91.01 90.84 90.78 564 90.39 90.78 91.21 91.06 90.88 562 90.91 90.86 91.01 90.73 90.92 560 90.69 90.99 90.91 90.91 91.03 558 90.62 91.12 90.89 91.08 90.99 556 90.89 90.88 91.04 90.97 91.06 554 90.97 91.17 91.07 90.84 90.87 552 90.97 91.15 91.05 91.03 91.02 550 90.73 91.23 91.19 90.94 91.09 548 90.66 91.04 91.06 91.10 90.84 546 90.70 91.02 91.04 91.10 90.92 544 90.80 91.22 91.18 90.81 91.24 542 90.99 91.34 90.95 91.52 91.03 540 90.92 91.26 91.26 90.84 91.24 538 90.97 90.98 91.17 91.16 91.07 536 90.90 91.31 91.04 90.96 91.13 534 90.98 91.01 91.18 90.97 91.10 532 91.23 91.04 91.10 91.18 91.08 530 90.88 91.23 91.00 91.16 91.26 528 90.99 91.32 91.04 91.10 91.23 526 91.00 91.36 91.08 91.04 91.37 524 91.10 91.23 91.46 91.03 91.25 522 90.89 91.43 91.27 91.15 91.31 520 90.97 91.33 91.26 91.01 91.28 518 91.24 91.15 91.21 91.15 91.34 516 91.03 91.10 91.24 91.13 91.13 514 91.36 91.49 91.26 91.29 91.27 512 91.12 91.30 91.30 91.25 91.31 510 90.99 91.48 91.39 91.17 91.29 508 91.03 91.31 91.56 91.41 91.66 506 91.11 91.30 91.30 91.50 91.26 504 91.17 91.49 91.20 91.33 91.49 502 91.36 91.49 91.52 91.37 91.37 500 91.16 91.21 91.51 91.00 91.45 498 91.22 91.48 91.37 91.32 91.44 496 91.28 91.28 91.68 91.48 91.14 494 91.28 91.37 91.35 91.48 91.18 492 91.43 91.45 91.30 91.43 91.40 490 90.82 91.52 91.53 91.28 91.25 488 91.40 91.44 91.66 91.47 91.20 486 91.33 91.62 91.49 91.17 91.34 484 91.38 91.81 91.36 91.46 91.30 482 91.14 91.57 91.47 91.15 91.38 480 91.39 91.43 91.61 91.29 91.53 478 91.24 91.62 91.80 91.31 91.41 476 91.15 91.39 91.56 91.41 91.42 474 91.29 91.67 91.68 91.32 91.15 472 91.12 91.26 91.63 91.60 91.26 470 91.47 91.71 91.49 91.35 91.50 468 91.09 91.52 91.64 91.49 91.72 466 91.60 91.38 91.66 91.56 91.63 464 91.22 91.86 91.75 91.76 91.43 462 91.01 91.48 91.73 91.34 91.25 460 91.43 91.70 91.44 91.69 91.56 458 91.48 91.37 91.84 91.76 91.39 456 91.25 91.75 91.73 91.39 91.41 454 91.23 91.28 91.95 91.21 91.78 452 91.55 91.67 91.39 91.60 91.59 450 90.94 91.56 91.85 91.59 91.60 448 91.43 91.64 91.58 91.38 91.46 446 91.13 91.20 91.89 91.73 91.58 444 91.68 91.52 92.11 91.26 91.58 442 91.46 91.89 91.61 91.34 91.47 440 91.23 91.77 91.61 91.27 91.58 438 91.20 91.79 91.96 91.15 91.47 436 91.49 91.30 91.09 91.20 91.48 434 91.32 91.58 91.37 91.60 91.46 432 91.24 91.45 91.55 91.86 91.94 430 91.46 91.62 91.48 91.62 91.68 428 91.46 91.64 91.55 91.14 91.84 426 91.92 92.13 91.81 91.57 91.69 424 91.40 91.98 91.64 91.26 91.97 422 91.57 92.04 91.75 91.36 91.77 420 91.77 92.10 92.03 91.96 91.43 418 91.44 91.73 92.23 91.19 91.67 416 91.49 92.01 91.76 91.51 91.98 414 91.96 91.48 91.56 91.35 92.00 412 91.15 91.13 91.55 91.68 91.37 410 91.18 91.99 91.82 91.11 91.92 408 91.56 91.58 91.71 91.52 91.95 406 91.56 92.21 91.54 91.65 92.36 404 91.65 91.77 91.81 91.79 91.19 402 91.56 91.73 91.39 91.65 91.28 400 91.80 92.38 91.59 91.35 92.13 398 92.40 91.73 92.02 91.86 91.65 396 91.48 91.71 91.09 92.70 91.61 394 91.20 92.01 92.67 92.36 91.49 392 92.07 92.17 92.04 91.23 91.48 390 91.51 91.50 92.35 91.36 92.31 388 91.63 91.44 91.66 91.58 92.81 386 91.68 91.66 92.17 91.36 91.83 384 90.11 91.52 92.37 92.11 91.89 382 90.67 91.66 91.35 91.40 91.31 380 90.48 91.58 91.78 92.24 92.02 1650 97.12 97.12 97.15 97.13 97.11 1640 97.11 97.14 97.17 97.13 97.11 1630 97.12 97.16 97.17 97.15 97.12 1620 97.12 97.14 97.19 97.15 97.12 1610 97.14 97.18 97.17 97.14 97.11 1600 97.12 97.14 97.19 97.16 97.13 1590 97.12 97.17 97.18 97.16 97.11 1580 97.11 97.14 97.18 97.13 97.13 1570 97.11 97.15 97.17 97.13 97.11 1560 97.10 97.13 97.17 97.13 97.11 1550 97.09 97.14 97.16 97.11 97.10 1540 97.09 97.11 97.14 97.11 97.08 1530 97.07 97.13 97.14 97.11 97.08 1520 97.06 97.10 97.13 97.09 97.07 1510 97.05 97.09 97.11 97.08 97.05 1500 97.03 97.06 97.11 97.07 97.05 1490 97.02 97.07 97.10 97.06 97.02 1480 97.01 97.05 97.08 97.06 97.01 1470 96.99 97.05 97.06 97.03 97.00 1460 96.98 97.02 97.05 97.02 96.98 1450 96.95 97.02 97.04 97.00 96.97 1440 96.95 97.00 97.02 96.98 96.96 1430 96.93 96.96 97.00 96.96 96.94 1420 96.91 96.95 96.98 96.94 96.92 1410 96.90 96.92 96.96 96.94 96.90 1400 96.86 96.91 96.96 96.92 96.89 1390 96.85 96.89 96.93 96.88 96.85 1380 96.82 96.87 96.91 96.87 96.84 1370 96.81 96.85 96.89 96.84 96.81 1360 96.78 96.82 96.86 96.82 96.80 1350 96.77 96.81 96.84 96.80 96.78 1340 96.74 96.79 96.82 96.76 96.75 1330 96.71 96.76 96.78 96.74 96.72 1320 96.67 96.73 96.76 96.72 96.69 1310 96.66 96.70 96.74 96.70 96.65 1300 96.62 96.67 96.70 96.67 96.62 1290 96.59 96.64 96.68 96.63 96.60 1280 96.56 96.61 96.64 96.59 96.56 1270 96.53 96.57 96.60 96.56 96.53 1260 96.48 96.54 96.57 96.53 96.50 1250 96.45 96.51 96.54 96.48 96.46 1240 96.41 96.46 96.48 96.44 96.41 1230 96.36 96.41 96.45 96.39 96.36 1220 96.32 96.38 96.41 96.34 96.32 1210 96.28 96.33 96.35 96.30 96.28 1200 96.21 96.27 96.30 96.25 96.23 1190 96.15 96.22 96.26 96.19 96.18 1180 96.10 96.16 96.19 96.12 96.11 1170 96.04 96.10 96.13 96.08 96.04 1160 95.96 96.03 96.08 96.02 95.99 1150 95.91 95.97 96.00 95.95 95.93 1140 95.84 95.91 95.93 95.88 95.84 1130 95.75 95.83 95.84 95.79 95.76 1120 95.66 95.74 95.75 95.71 95.69 1110 95.58 95.64 95.67 95.62 95.60 1100 95.48 95.56 95.58 95.51 95.50 1090 95.37 95.45 95.47 95.42 95.37 1080 95.25 95.32 95.36 95.29 95.27 1070 95.12 95.21 95.23 95.17 95.16 1060 94.99 95.07 95.10 95.05 95.01 1050 94.84 94.93 94.93 94.89 94.86 1040 94.69 94.76 94.76 94.72 94.70 1030 94.50 94.58 94.61 94.56 94.52 1020 94.30 94.38 94.42 94.36 94.32 1010 94.07 94.16 94.19 94.14 94.09 1000 93.85 93.92 93.95 93.89 93.85 990 93.58 93.64 93.68 93.65 93.59 980 93.28 93.37 93.38 93.33 93.29 970 92.94 93.02 93.07 93.00 92.97 960 92.59 92.68 92.69 92.63 92.59 950 92.16 92.25 92.28 92.23 92.18