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Filters for CCD Imaging and Spectroscopy (1Jun93) (from CTIO, NOAO Newsletter No. 34, 1 June 1993) Since the last edition of the CTIO Facilities Manual, several new filters have been added to our collection of imaging filters. A smaller number of, mostly very old, filters have deteriorated to such an extent that they have had to be retired from service. In addition, new measurements of the transmission curves for the vast majority of our filters have been completed recently, although a few remain to be traced. An up-to-date filter catalog is given below. In this listing lambdac and delta lambda are the wavelength midway between the two half-power points and the FWHM of the filter pass band respectively, and Tmax is the peak transmission of the filter; these quantities are given as zero when recent measurements are not available. Please note that, to avoid vignetting with the Tek2048 CCD, filters of at least 4 x 4 inches must be used at the 4-m prime focus and of at least 3 x 3 inches at all other locations. For the Tek1024 and smaller CCDs 2 x 2 inch filters can be used at all locations without vignetting. We have also replaced and expanded the stock of colored glass order sorting filters available for spectroscopy. The following new filters are available for the 4-m R-C and Echelle spectrographs and for the 1.5-m spectrograph: Schott BG39, BG38, WG335, WG360, GG385, GG455, GG495, OG550, RG610, RG695. In addition the following are available for the 4-m R-C and Echelle spectrographs only: GG420, OG515, OG570, OG590, RG665. All these filters have been anti- reflection coated to maximize transmission within the filter passband. The CTIO filter catalog together with complete transmission curves for the individual filters is available in the ctio ftp archive. They can be retrieved by connecting to ctios1.ctio.edu (139.229.2.1) using anonymous as user name and supplying your e-mail address as password. The filter data will be found in the directory /pub/manuals/filters; consult the file README in that directory for further instructions. Filter Size LamC FWHM Tmax Filter Set Comments Name (in) (Å) (Å) (%) 2x2 0 0 00.00 B std PFCCD 2x2 0 0 00.00 C Washington #3 2x2 0 0 00.00 I 34 PFCCD 2x2 0 0 00.00 M Washington #3 2x2 0 0 00.00 T1 Washington #3 2x2 0 0 00.00 T2 Washington #3 2x2 0 0 00.00 V std PFCCD 3x3 0 0 00.00 C Washington 3x3 0 0 00.00 M Washington 3x3 0 0 00.00 T1 Washington 4x4 0 0 00.00 B Harris 4x4 0 0 00.00 C Washington 4x4 0 0 00.00 M Washington 4x4 0 0 00.00 R Harris 4x4 0 0 00.00 T1 Washington 4x4 0 0 00.00 V Harris 3085/75 1Dia 3085 75 38.50 Comet Set 3510/300 2x2 3510 300 33.60 u2 Strömgren #1 3515/290 2x2 3517 280 35.11 u1 Strömgren #1 3520/300 2Dia 3520 296 37.50 u Strömgren #2 3525/320 2x2 3525 320 36.00 u Strömgren #3 3530/400 2x2 3539 386 28.01 u Gunn-Thuan #1 3565/630 4x4 3565 630 75.27 U Liq CuSO4 3565/670 3x3 3565 670 75.14 U Liq CuSO4 2 3570/660 2x2 3570 660 84.34 U Liq CuSO4 1 3572/665 2x2 3572 665 82.50 U Liq CuSO4 2 3575/670 2x2 3575 670 82.90 U Liq CuSO4 3 3590/660 2x2 3590 660 87.20 U Liq CuSO4 4 1m guider box 3650/100 1Dia 3651 79 44.00 Comet Set 3650/600 2x2 3641 470 34.56 U CTIO ("new") 3650/643 3x3 3650 643 71.25 U Liq CuSO4 1 3656/167 2x2 3656 170 53.00 Argus-Echelle 3700/110 2x2 3698 97 46.95 red leak 9000Å 3727/21 2x2 3735 24 30.39 3727/44 2x2 0 0 00.00 H beta set 3727/45 2x2 3727 40 28.06 ghost images? 3765/45 2x2 3770 43 24.52 3767/44 2x2 0 0 00.00 H beta set 3780/181 2x2 3790 190 50.00 Argus-Echelle 3800/110 2x2 3797 110 34.85 3870/50 1Dia 3877 39 25.00 Comet Set 3912/196 2x2 3910 130 48.00 Argus-Echelle 2 faces coated 3980/400 2x2 3987 398 47.95 v Gunn-Thuan #1 4054/214 2x2 4064 220 46.00 Argus-Echelle 4060/70 1Dia 4061 75 46.50 Comet Set 4100/160 2Dia 4126 172 59.11 v Strömgren #2 4100/160 2x2 4110 160 60.00 v Strömgren #3 4110/190 2x2 4125 182 44.99 v Strömgren #1 4166/83 1Dia 4167 90 63.00 DDO set 4207/233 2x2 4222 230 48.00 Argus-Echelle 4257/73 1Dia 4260 77 77.00 DDO set 4260/65 1Dia 4278 70 44.50 Comet Set 4324/1050 2x2 4300 1050 73.00 B Harris #1 4324/1056 2x2 4324 1056 71.00 B Harris #3 4324/1156 2x2 4324 1156 72.00 B Harris #2 4340/980 3x3 4341 980 60.33 B Harris #1 4345/980 3x3 4345 980 60.85 B Harris #2 4363/20 2x2 4358 19 31.16 4372/255 2x2 4390 250 68.00 Argus-Echelle 4380/1086 2x2 4380 1086 77.00 B-14 4390/1060 2x2 4390 1060 78.00 B-3 4390/1109 2x2 4390 1109 77.00 B-15 4410/1109 2x2 4410 1109 78.00 B-16 4440/1125 2x2 4440 1125 79.00 B-13 4517/76 1Dia 4516 77 75.00 DDO set 4551/280 2x2 4563 275 72.00 Argus-Echelle 4650/190 2x2 4654 173 55.09 b Strömgren #1 4685/44 2x2 4685 38 78.00 H beta set 1 face coated 4686/15 2x2 4685 13 29.77 4695/15 2x2 4692 15 34.60 4700/190 2Dia 4724 190 69.12 b Strömgren #2 4705/175 2x2 4705 175 79.30 b Strömgren #3 4745/309 2x2 4745 330 82.00 Argus-Echelle 2 faces coated 4845/65 1Dia 4846 69 74.00 Comet set 4857/12 2x2 4858 14 51.73 4861/26 2Dia 4854 27 56.00 4861/44 2x2 4865 42 79.00 H beta set 1 face coated 4861/50 2x2 4872 53 58.66 4862/14 2x2 4860 14 66.00 4866/12 2x2 4859 15 48.34 4880/70 2x2 4888 70 64.79 4886/186 1Dia 4890 195 76.00 DDO set 4900/650 2x2 4893 254 89.17 g Gunn-Thuan #1 4905/44 2x2 4905 42 78.00 H beta set 1 face coated 4949/44 2x2 4952 42 84.00 H beta set 1 face coated 4955/341 2x2 4950 350 83.00 Argus-Echelle 2 faces coated 4993/44 2x2 4993 44 83.00 H beta set 1 face coated 5000/70 2x2 4994 77 63.41 5007/22 2x2 5007 20 69.65 old Fabry-Perot 5007/44 2x2 5002 41 77.60 H beta set 1 face coated 5013/14 2x2 5015 17 64.63 old Fabry Perot LMC Redshift 5024/15 2x2 5026 16 43.63 internal fringes 5029/43 2x2 0 0 00.00 Fabry-Perot 5032/15 2x2 5032 15 41.50 internal fringes 5037/44 2x2 5037 40 83.00 H beta set 1 face coated 5040/15 2x2 5038 16 36.58 5049/15 2x2 5049 14 38.15 internal fringes 5057/15 2x2 5057 14 39.28 internal fringes 5081/44 2x2 5084 42 82.00 H beta set 1 face coated 5100/100 1x1 5098 88 61.00 0.75Dia useful 5117/895 2x2 5117 895 81.39 g Gunn-Thuan #2 5118/900 3x3 5118 900 81.39 g Gunn-Thuan 5125/44 2x2 5124 41 83.00 H beta set 1 face coated 5140/90 1Dia 5137 87 62.00 Comet set 5145/80 2x2 5152 80 60.69 3c 5169/44 2x2 5167 43 80.00 H beta set 1 face coated 5186/379 2x2 5180 390 85.00 Argus-Echelle 2 faces coated 5200/ .75 5187 95 64.00 5213/44 2x2 5213 45 80.50 H beta set 1 face coated 5257/44 2x2 5257 42 79.50 H beta set 1 face coated 5362/895 3x3 5362 895 76.80 V Harris #1 5370/900 3x3 5370 900 75.64 V Harris #2 5378/1018 2x2 5378 1018 91.00 V Harris #3 5380/1000 2x2 5380 1000 91.00 V Harris #1 5400/100 2x2 5415 114 46.58 5409/948 2x2 5409 948 90.50 V Harris #2 5435/1081 2x2 5435 1081 72.00 V-14 5439/420 2x2 5450 420 80.00 Argus-Echelle 5460/1118 2x2 5465 1118 74.60 V-16 5461/ 1x1 5447 96 55.00 5470/1114 2x2 5470 1114 74.00 V-15 5500/200 2x2 5514 224 62.76 y Strömgren #1 5500/240 2Dia 5513 238 74.45 y Strömgren #2 5500/240 2x2 5500 260 80.00 y Strömgren #3 5718/470 2x2 5730 470 78.00 Argus-Echelle 5755/20 2x2 5758 20 60.19 5800/100 2x2 5796 108 56.35 5877/14 2x2 5877 16 75.62 old Fabry-Perot 5890/40 2x2 0 0 00.00 Fabry-Perot 5894/14 2x2 0 0 00.00 Fabry-Perot 5900/350 2x2 5924 268 62.01 x Gunn-Thuan #1 5915/40 2x2 0 0 00.00 Fabry-Perot 5950/40 2x2 0 0 00.00 Fabry-Perot 5997/40 2x2 0 0 00.00 Fabry-Perot 6027/531 2x2 6030 480 82.00 Argus-Echelle 2 faces coated 6087/40 2x2 0 0 00.00 Fabry Perot 6100/100 2x2 6101 103 53.66 6301/10 2x2 6294 13 75.00 old Fabry-Perot 6330/100 1Dia 6342 93 65.15 633fs10-25 internal fringes 6371/601 2x2 6470 630 86.50 Argus-Echelle 2 faces coated 6440/1520 2x2 6440 1520 86.00 R Harris #1 6454/1451 2x2 6454 1451 85.00 R Harris #2 6420/1180 2x2 6420 1180 68.00 R-13 6465/1300 2x2 6465 1300 57.00 R-10 bubbles 6475/1600 3x3 6475 1600 81.70 R Harris #1 6477/1235 2x2 6477 1235 59.74 R-11 broken corner 6477/75 2x2 6477 72 82.00 H alpha set 6484/1532 2x2 6484 1532 86.00 R Harris #3 6493/1445 3x3 6493 1445 77.00 R Harris #2 6500/1330 2x2 6500 1330 92.00 I 33 PFCCD 6510/1300 2x2 6510 1300 90.00 R 34 PFCCD 6520/75 2x2 6520 73 74.00 H alpha set 6552/40 2x2 0 0 00.00 Fabry-Perot 6559/5 2x2 6557 7 56.12 old Fabry-Perot 6560/110 2x2 6591 118 62.28 Corion 6563/110 2x2 6562 120 62.66 3C 6563/12 2Dia 0 0 00.00 Fabry-Perot 6563/16 1x1 6573 15 79.00 6563/17 2x2 6560 20 77.41 old Fabry-Perot bad corner 6563/75 3x3 6554 68 90.00 6563/75 4x4 6559 70 83.50 6563/78 2x2 6563 82 85.00 H alpha set 6563/85 1x1 6586 103 83.00 bad corner 6571/15 2x2 0 0 00.00 Fabry-Perot 6575/14 2x2 6571 18 74.12 Old Fabry Perot LMC Redshift 6584/15 2x2 0 0 00.00 Fabry-Perot 6586/40 2x2 0 0 00.00 Fabry-Perot 6600/100 2x2 6593 118 62.08 #1 6600/110 2x2 6593 118 62.08 #2 6600/110 2x2 6597 108 57.25 3c 6600/75 3x3 6592 65 88.00 6600/75 4x4 6593 64 86.00 6606/75 2x2 6606 76 84.00 H alpha set 6618/20 2x2 0 0 00.00 2 faces coated 6636/20 2x2 0 0 00.00 2 faces coated 6649/76 2x2 6648 78 87.00 H alpha set 6654/20 2x2 0 0 00.00 2 faces coated 6672/20 2x2 0 0 00.00 2 faces coated 6680/100 2x2 6687 112 87.59 CFA set 6693/76 2x2 6689 81 87.00 H alpha set 6700/350 2x2 6696 316 61.71 r Gunn-Thuan #1 6705/5 1x1 6702 7 42.00 6716/13 2x2 6716 13 55.00 6718/20 2x2 0 0 00.00 6718/5 1x1 6719 6 46.00 6724/34 2x2 6726 36 82.71 old Fabry-Perot 6724/7 2x2 0 0 00.00 6727/1015 2x2 6727 1015 93.83 r Gunn-Thuan #2 6728/1000 3x3 6728 1000 93.83 r Gunn-Thuan 6731/13 2x2 0 0 00.00 6731/6 2x2 6733 7 50.61 old Fabry-Perot 6732/20 2x2 0 0 00.00 6732/5 1x1 6737 10 32.00 6737/76 2x2 6738 87 83.00 H alpha set 6757/684 2x2 6760 650 87.00 Argus-Echelle 2 faces coated 6781/78 2x2 6779 88 77.00 H alpha set 6820/100 2x2 6820 100 87.00 CFA set 6826/78 2x2 6825 85 78.00 H alpha set 6840/120 2x2 6903 130 63.40 6840/90 1Dia 6848 90 76.80 Comet set 6850/80 2x2 6899 134 61.59 6860/80 2x2 6888 128 62.09 6871/78 2x2 6864 83 85.00 H alpha set 6890/100 2x2 6890 100 83.00 CFA set 6916/78 2x2 6914 80 82.00 H alpha set 6961/79 2x2 6962 85 82.00 H alpha set 7000/175 1Dia 7125 175 82.00 Comet set 7007/79 2x2 7007 81 75.00 H alpha set 7053/79 2x2 7046 77 77.00 H alpha set 7080/100 2x2 7080 100 83.00 CFA set 7099/80 2x2 7101 82 78.00 H alpha set 7146/80 2x2 7139 76 80.00 H alpha set 7193/780 2x2 7180 800 80.00 Argus-Echelle 7193/80 2x2 7192 72 76.00 H alpha set 7240/75 2x2 7237 77 83.00 H alpha set 7288/82 2x2 7286 90 84.00 H alpha set 7336/82 2x2 7335 80 83.00 H alpha set 7384/84 2x2 7380 91 81.00 H alpha set 7433/84 2x2 7427 76 83.00 H alpha set 7482/84 2x2 7475 85 83.00 H alpha set 7500/100 2x2 7512 147 58.00 7531/84 2x2 7532 85 81.00 H alpha set 7580/85 2x2 7589 91 76.00 H alpha set 7630/85 2x2 7630 81 80.00 H alpha set 7680/84 2x2 7677 84 81.00 H alpha set 7689/907 2x2 7720 860 88.00 Argus-Echelle 7700/110 2x2 7708 108 64.00 7730/85 2x2 7726 83 80.00 H alpha set 7781/86 2x2 7775 83 71.00 H alpha set 7832/86 2x2 7830 88 77.00 H alpha set 7883/86 2x2 7881 89 73.00 H alpha set 7935/88 2x2 7930 93 71.00 H alpha set 8050/1500 2x2 0 0 70.00 I Kron-Cousins #2 8050/1500 2x2 0 0 70.00 I Kron-Cousins #3 8050/1500 3x3 0 0 70.00 I Kron-Cousins #1 8050/1500 3x3 0 0 70.00 I Kron-Cousins #2 8050/1500 4x4 0 0 70.00 I Kron-Cousins 8100/110 2x2 8106 123 67.00 8100/1500 3x3 8100 1500 93.00 i Gunn-Thuan 8102/1505 2x2 8102 1505 93.89 i Gunn-Thaun #2 8200/900 2x2 8186 943 90.00 i Gunn-Thaun #1 8227/1865 2x2 8227 1865 71.65 I-11 8259/1058 2x2 8260 1080 86.00 Argus-Echelle 8200/1640 2x2 8200 1640 76.00 I-10 8200/1640 2x2 8200 1640 76.00 I-13 bubble 8300/110 2x2 8306 128 61.00 8542/18 2x2 0 0 0.00 Fabry-Perot 8585/100 2x2 0 0 0.00 Fabry-Perot 8920/1249 2x2 8920 1080 88.00 Argus-Echelle 2 faces coated 9532/20 2x2 9536 20 45.00 9695/1492 2x2 9670 1380 81.00 Argus-Echelle 9900 2x2 0 0 95.30 z Gunn-Thaun #2 45% > 8435Å 9900 3x3 0 0 95.50 z Gunn-Thaun 57% > 8490Å Daniel Maturana, Ricardo Gonzalez, Steve Heathcote, Bob Schommer
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