Triple Spectrograph (TSpec) Technical Specifications

View the original specsheet.

Spectrograph

Status: Observatory Instrument

  • Slit: 1 × 30 arcsecond slit
  • Wavelength coverage: 1.0 – 2.4 µm
  • Spectral resolution: 2500 – 2700
  • Sampling: ~ 2.7 pixels per resolution element
  • Minimum integration time: 4 seconds
  • Gain: ~ 3.8 e/DN
  • Saturation level: ~ 28000 DN (conservatively)
  • Data sampling: CDS, Fowler, or sample-up the ramp
  • Read noise: 10 e (CDS), 5 e (8 samples), 3.5 e (16 samples)
  • Dark current: ~ 0.085 e/sec
  • Time to background limit: ~ 300 seconds
  • Array size: 1K × 2K

Guider/Imager

Status: Observatory Instrument

  • Wavelength: 1 – 2.5 µm
  • Size of field: 4′ × 4′
  • Scale: 0.234″/pixel
  • Minimum integration time: 1.8 seconds
  • MCT: Engineering grade Hawaii II CCD 1024 × 1024
  • Data sampling: CDS, CCD linear to 30,000 ADU, however, in differencing mode continuously exposed, the displayed image goes non-linear ~18,000 ADU
  • Read noise: < 10 e (CDS)

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TripleSpec Specs / v 2.0
Last updated: 11 June 2015 ACM