Sky Background

Expected Sky Background @ TAO site†

This page provides the sky background expected at the TAO site. The sky background consists of near-infrared (NIR) continuous emission (only for NIR data), airglow (only for NIR data), and atmospheric thermal emission. The near-infrared continuous emission and the airglow emission are calculated based on the Gemini Observatory's model. The atmospheric emission is calculated based on the atmospheric transmittance given on the another page predicted by the ATRAN model (Lord, S. D., 1992, NASA Technical Memorandum 103957). The emissivity and temperature of the atmosphere are assumed to be 1 - transmittance and 240 K, respectively. The precipitable water vapor (PWV) toward the zenith is set to 0.3, 0.5, 0.7, 0.9, 1.2, and 1.5 mm.

• Overview Plots
  • NIR
  • N-band
  • Q-band
  • 30-um band
• Data

Overview Plots†

NIR (1-6 um)†

Near-infrared sky background expected at the TAO site.

N-band (6-14 um)†

N-band sky background expected at the TAO site. The step seen at 11 um is an artificial feature caused by the ATRAN calculation (boundary of wavelength range).

Q-band (15-26 um)†

Q-band sky background expected at the TAO site.

30-um band (27-39 um)†

Sky background in the 30-um band expected at the TAO site.

Data†

PWV (mm)	NIR (1-6 um)	N band (6-14 um)	Q band (15-26 um)	30-um band (27-38 um)
0.3	data	data	data	data
0.5	data	data	data	data
0.7	data	data	data	data
0.9	data	data	data	data
1.2	data	data	data	data
1.5	data	data	data	data

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  • Mir20years (2019)
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