With the 2.7m Harlan J. Smith Telescope at McDonald Observatory (30° 40' 17.4" N, 104° 01' 21.4" W)
Wavelength Coverage | H: 1.47-1.81μm, K: 1.95-2.48μm |
Spectral Resolution | R = λ/Δλ = ~45,000 (1.164x10-5 μm/pixel; 2km/s per pixel) |
Resolution Element (3.3 pixels) | 3.84x10-5 μm ; ~6.6 km/s |
Slit Scale | 1" x 14.8" (8.6 x 124 pixels) |
SVC Field of View | ~187" x 112" (Slit Viewer Field-of-View) |
Pixel Scale | 0.119" per pixel (SVC) |
Detectors | 2k x 2k Teledyne HgCdTe HAWAII-2RG CMOS |
Detector Gain | H: ~2.05 e-/ADU, K: ~2.21 e-/ADU |
Full Well | H: ~9.1x104 e-, K: ~105 e- |
Minimum Data Taking Time | 1.63 sec exposure with Fowler number 1* |
Read Noise | H: ~10.92 e-, K: ~8.93 e- |
*For spectra, we recommend a minimum exposure time of 28 seconds (required to reach Fowler Sampling of 16) and a maximum exposure time of 300 seconds. Not abiding by the minimum can introduce undesirable and unphysical flux jumps between orders. Not abiding by the maximum can introduce a large amount of sky variation and cosmic rays throughout the exposure which can be difficult to detect.
Detector information is based on the results in Jeong et al. (2014) and Park et al. (2014).