|
MDM Observatory's 8K CCD array project:
FILTERS FOR THE 8K CCD ARRAY e-mail: arlin@astro.columbia.edu Telephone: (212) 854-7899 |
The initial complement of filters planned are primarily based on the KPNO Harris set, and close to Johnson U, Johnson B, Johnson V, Johnson R and Kron-Cousins I, along with an extended Cousins R (R_jt) used by the VATT/Columbia and MEGA projects to study microlensing in M31. The filters must have a minimum active region of 5.5 inches (squares) in order to avoid vignetting. The filters are 5.75 inch (square) in order to be directly compatible with KPNO/MOSAIC. These are close to parfocal, and close to consistent with focus for KPNO/MOSAIC filters. Tabulated values and plots of the filter transmission curves are shown below. They do not include the other factors in the system response.
Filter Transmission Curves:
U /
B /
V /
R /
I (preliminary) /
Z /
R_jt /
H-alpha (on-band) /
H-alpha (off-band)
Tabulated Transmission Curves (preliminary):
| Wavelength | U | B | V | R | I | R_jt |
| (Angstroms) | % | % | % | % | % | % |
| 3000 | 0.35 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3050 | 3.34 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3100 | 13.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3150 | 30.95 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3200 | 49.76 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3250 | 64.56 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3300 | 75.57 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3350 | 80.57 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3400 | 84.72 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3450 | 86.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3500 | 87.51 | 0.02 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3550 | 86.51 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3600 | 85.17 | 1.94 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3650 | 83.42 | 5.28 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3700 | 77.65 | 10.47 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3750 | 70.44 | 17.09 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3800 | 59.17 | 24.68 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3850 | 43.31 | 32.54 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3900 | 26.40 | 40.17 | 0.00 | 0.00 | 0.00 | 0.00 |
| 3950 | 12.19 | 46.99 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4000 | 4.22 | 52.83 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4050 | 1.15 | 57.49 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4100 | 0.26 | 61.30 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4150 | 0.03 | 64.22 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4200 | 0.00 | 66.52 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4250 | 0.00 | 67.99 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4300 | 0.00 | 68.86 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4350 | 0.00 | 69.24 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4400 | 0.00 | 69.27 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4450 | 0.00 | 68.85 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4500 | 0.00 | 67.59 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4550 | 0.00 | 66.18 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4600 | 0.00 | 64.01 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4650 | 0.00 | 60.64 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4700 | 0.00 | 55.49 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4750 | 0.00 | 49.25 | 0.00 | 0.00 | 0.00 | 0.00 |
| 4800 | 0.00 | 42.46 | 0.55 | 0.00 | 0.00 | 0.00 |
| 4850 | 0.00 | 35.29 | 13.03 | 0.00 | 0.00 | 0.00 |
| 4900 | 0.00 | 28.65 | 45.12 | 0.00 | 0.00 | 0.00 |
| 4950 | 0.00 | 23.28 | 69.44 | 0.00 | 0.00 | 0.00 |
| 5000 | 0.00 | 19.12 | 80.85 | 0.00 | 0.00 | 0.00 |
| 5050 | 0.00 | 14.59 | 85.66 | 0.00 | 0.00 | 0.00 |
| 5100 | 0.00 | 10.47 | 87.62 | 0.00 | 0.00 | 0.00 |
| 5150 | 0.00 | 7.49 | 88.31 | 0.00 | 0.00 | 0.00 |
| 5200 | 0.00 | 5.02 | 88.35 | 0.00 | 0.00 | 0.00 |
| 5250 | 0.00 | 3.17 | 87.84 | 0.00 | 0.00 | 0.00 |
| 5300 | 0.00 | 2.03 | 86.93 | 0.00 | 0.00 | 0.00 |
| 5350 | 0.00 | 1.47 | 85.58 | 0.00 | 0.00 | 0.00 |
| 5400 | 0.00 | 1.26 | 83.72 | 0.00 | 0.00 | 0.03 |
| 5450 | 0.00 | 1.29 | 81.36 | 0.00 | 0.00 | 0.10 |
| 5500 | 0.00 | 1.59 | 78.46 | 0.11 | 0.00 | 0.25 |
| 5550 | 0.00 | 2.06 | 74.95 | 1.13 | 0.00 | 0.80 |
| 5600 | 0.00 | 2.26 | 70.82 | 7.99 | 0.00 | 3.30 |
| 5650 | 0.00 | 2.00 | 66.17 | 27.39 | 0.00 | 18.20 |
| 5700 | 0.00 | 1.43 | 60.98 | 51.75 | 0.00 | 34.40 |
| 5750 | 0.00 | 0.80 | 55.40 | 69.43 | 0.00 | 53.10 |
| 5800 | 0.00 | 0.36 | 49.51 | 79.15 | 0.00 | 62.80 |
| 5850 | 0.00 | 0.14 | 43.52 | 83.75 | 0.00 | 68.10 |
| 5900 | 0.00 | 0.07 | 37.51 | 85.61 | 0.00 | 72.00 |
| 5950 | 0.00 | 0.05 | 31.72 | 86.16 | 0.00 | 76.10 |
| 6000 | 0.00 | 0.05 | 26.29 | 85.95 | 0.00 | 82.20 |
| 6050 | 0.00 | 0.00 | 21.31 | 85.29 | 0.00 | 86.30 |
| 6100 | 0.00 | 0.00 | 16.90 | 84.44 | 0.00 | 92.30 |
| 6150 | 0.00 | 0.00 | 13.10 | 83.32 | 0.00 | 95.60 |
| 6200 | 0.00 | 0.00 | 9.93 | 82.07 | 0.00 | 95.80 |
| 6250 | 0.00 | 0.00 | 7.34 | 80.74 | 0.00 | 95.20 |
| 6300 | 0.00 | 0.00 | 5.31 | 79.21 | 0.00 | 94.40 |
| 6350 | 0.00 | 0.00 | 3.75 | 77.63 | 0.00 | 94.10 |
| 6400 | 0.00 | 0.00 | 2.58 | 75.95 | 0.00 | 94.80 |
| 6450 | 0.00 | 0.00 | 1.74 | 74.25 | 0.00 | 95.50 |
| 6500 | 0.00 | 0.00 | 1.14 | 72.49 | 0.00 | 95.10 |
| 6550 | 0.00 | 0.00 | 0.73 | 70.65 | 0.00 | 93.70 |
| 6600 | 0.00 | 0.00 | 0.46 | 68.79 | 0.00 | 91.20 |
| 6650 | 0.00 | 0.00 | 0.28 | 66.90 | 0.00 | 88.90 |
| 6700 | 0.00 | 0.00 | 0.17 | 64.96 | 0.00 | 87.50 |
| 6750 | 0.00 | 0.00 | 0.10 | 62.93 | 0.00 | 87.80 |
| 6800 | 0.00 | 0.00 | 0.05 | 60.72 | 0.00 | 89.30 |
| 6850 | 0.00 | 0.00 | 0.03 | 58.51 | 0.00 | 92.10 |
| 6900 | 0.00 | 0.00 | 0.01 | 56.21 | 0.00 | 95.80 |
| 6950 | 0.00 | 0.00 | 0.00 | 53.85 | 0.06 | 97.60 |
| 7000 | 0.00 | 0.00 | 0.00 | 51.58 | 0.22 | 93.90 |
| 7050 | 0.00 | 0.00 | 0.00 | 49.23 | 1.61 | 81.90 |
| 7100 | 0.00 | 0.00 | 0.00 | 46.94 | 6.17 | 60.80 |
| 7150 | 0.00 | 0.00 | 0.00 | 44.69 | 15.48 | 40.30 |
| 7200 | 0.00 | 0.00 | 0.00 | 42.39 | 28.68 | 24.80 |
| 7250 | 0.00 | 0.00 | 0.00 | 40.22 | 43.17 | 15.10 |
| 7300 | 0.00 | 0.00 | 0.00 | 38.07 | 55.88 | 9.40 |
| 7350 | 0.00 | 0.00 | 0.00 | 35.86 | 66.16 | 6.00 |
| 7400 | 0.00 | 0.00 | 0.00 | 33.80 | 74.67 | 3.90 |
| 7450 | 0.00 | 0.00 | 0.00 | 31.71 | 81.57 | 2.80 |
| 7500 | 0.00 | 0.00 | 0.00 | 29.73 | 86.96 | 2.10 |
| 7550 | 0.00 | 0.00 | 0.00 | 27.76 | 89.65 | 1.60 |
| 7600 | 0.00 | 0.00 | 0.00 | 25.82 | 90.47 | 1.10 |
| 7650 | 0.00 | 0.00 | 0.00 | 24.00 | 90.87 | 0.70 |
| 7700 | 0.00 | 0.00 | 0.00 | 22.27 | 91.94 | 0.60 |
| 7750 | 0.00 | 0.00 | 0.00 | 20.60 | 93.14 | 0.50 |
| 7800 | 0.00 | 0.00 | 0.00 | 18.96 | 93.65 | 0.40 |
| 7850 | 0.00 | 0.00 | 0.00 | 17.46 | 93.66 | 0.20 |
| 7900 | 0.00 | 0.00 | 0.00 | 16.00 | 92.78 | 0.20 |
| 7950 | 0.00 | 0.00 | 0.00 | 14.67 | 91.64 | 0.10 |
| 8000 | 0.00 | 0.00 | 0.00 | 13.37 | 91.44 | 0.10 |
| 8050 | 0.00 | 0.00 | 0.00 | 12.19 | 91.76 | 0.10 |
| 8100 | 0.00 | 0.00 | 0.00 | 11.09 | 93.02 | 0.00 |
| 8150 | 0.00 | 0.00 | 0.00 | 10.12 | 93.16 | 0.00 |
| 8200 | 0.00 | 0.00 | 0.00 | 9.17 | 93.10 | 0.00 |
| 8250 | 0.00 | 0.00 | 0.00 | 8.26 | 92.04 | 0.00 |
| 8300 | 0.00 | 0.00 | 0.00 | 7.48 | 91.80 | 0.00 |
| 8350 | 0.00 | 0.00 | 0.00 | 6.73 | 91.69 | 0.00 |
| 8400 | 0.00 | 0.00 | 0.00 | 6.03 | 91.58 | 0.00 |
| 8450 | 0.00 | 0.00 | 0.00 | 5.41 | 91.97 | 0.00 |
| 8500 | 0.00 | 0.00 | 0.00 | 4.89 | 91.67 | 0.00 |
| 8550 | 0.00 | 0.00 | 0.00 | 4.41 | 90.16 | 0.00 |
| 8600 | 0.00 | 0.00 | 0.00 | 3.90 | 90.06 | 0.00 |
| 8650 | 0.00 | 0.00 | 0.00 | 3.60 | 90.95 | 0.00 |
| 8700 | 0.00 | 0.00 | 0.00 | 3.22 | 90.61 | 0.00 |
| 8750 | 0.00 | 0.00 | 0.00 | 2.89 | 89.67 | 0.00 |
| 8800 | 0.00 | 0.00 | 0.00 | 2.58 | 88.16 | 0.00 |
| 8850 | 0.00 | 0.00 | 0.00 | 2.29 | 87.08 | 0.00 |
| 8900 | 0.00 | 0.00 | 0.00 | 2.05 | 86.81 | 0.00 |
| 8950 | 0.00 | 0.00 | 0.00 | 1.81 | 86.30 | 0.00 |
| 9000 | 0.00 | 0.00 | 0.00 | 1.62 | 82.25 | 0.00 |
| 9050 | 0.00 | 0.00 | 0.00 | 1.45 | 73.85 | 0.00 |
| 9100 | 0.00 | 0.00 | 0.00 | 1.30 | 65.60 | 0.00 |
| 9150 | 0.00 | 0.00 | 0.00 | 1.16 | 59.55 | 0.00 |
| 9200 | 0.00 | 0.00 | 0.00 | 1.02 | 43.10 | 0.00 |
| 9250 | 0.00 | 0.00 | 0.00 | 0.94 | 17.00 | 0.00 |
| 9300 | 0.00 | 0.00 | 0.00 | 0.83 | 4.50 | 0.00 |
| 9350 | 0.00 | 0.00 | 0.00 | 0.77 | 1.25 | 0.00 |
| 9400 | 0.00 | 0.00 | 0.00 | 0.65 | 0.40 | 0.00 |
| 9450 | 0.00 | 0.00 | 0.00 | 0.61 | 0.13 | 0.00 |
| 9500 | 0.00 | 0.00 | 0.00 | 0.56 | 0.06 | 0.00 |
| 9550 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
