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#author("2022-12-22T09:07:04+00:00","default:mimizuku","mimizuku") #author("2022-12-22T09:07:56+00:00","default:mimizuku","mimizuku") * Expected Sky Background @ TAO site [#c81d01c9] 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>http://www.gemini.edu/observing/telescopes-and-sites/sites#IRSky]]. The atmospheric emission is calculated based on the atmospheric transmittance given on the [[another page>http://www.ioa.s.u-tokyo.ac.jp/TAO/mimizuku/pub/?Atmospheric+Transmittance]] 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>./#t2cfb937]] - [[Overview Plots>./#t2cfb937]] -- [[NIR>./#pf41b8b6]] -- [[N-band>./#y29c8f28]] -- [[Q-band>./#le32290c]] -- [[30-um band>./#w9265bcd]] - [[Data>./#n30c5116]] * Overview [#t2cfb937] * Overview Plots[#t2cfb937] **NIR (1-6 um) [#pf41b8b6] |LEFT:50|c |CENTER:&ref(ch_skybg_nir.jpg,,10%);| |Near-infrared sky background expected at the TAO site.| **N-band (6-14 um) [#y29c8f28] |LEFT:50|c |CENTER:&ref(ch_skybg_nband.jpg,,10%);| |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) [#le32290c] |LEFT:50|c |CENTER:&ref(ch_skybg_qband.jpg,,10%);| |Q-band sky background expected at the TAO site.| **30-um band (27-39 um) [#w9265bcd] |LEFT:50|c |CENTER:&ref(ch_skybg_30um.jpg,,10%);| |Sky background in the 30-um band expected at the TAO site.| * Data [#n30c5116] |CENTER:|CENTER:|CENTER:|CENTER:|c |PWV (mm)|NIR (1-6 um)|N band (6-14 um)|Q band (15-26 um)|30-um band (27-38 um)| |0.3|&ref(ch_skybg_03_10_ph_nir.dat,,data);|&ref(ch_skybg_03_10_ph_nband.dat,,data);|&ref(ch_skybg_03_10_ph_qband.dat,,data);|&ref(ch_skybg_03_10_ph_30um.dat,,data);| |0.5|&ref(ch_skybg_05_10_ph_nir.dat,,data);|&ref(ch_skybg_05_10_ph_nband.dat,,data);|&ref(ch_skybg_05_10_ph_qband.dat,,data);|&ref(ch_skybg_05_10_ph_30um.dat,,data);| |0.7|&ref(ch_skybg_07_10_ph_nir.dat,,data);|&ref(ch_skybg_07_10_ph_nband.dat,,data);|&ref(ch_skybg_07_10_ph_qband.dat,,data);|&ref(ch_skybg_07_10_ph_30um.dat,,data);| |0.9|&ref(ch_skybg_09_10_ph_nir.dat,,data);|&ref(ch_skybg_09_10_ph_nband.dat,,data);|&ref(ch_skybg_09_10_ph_qband.dat,,data);|&ref(ch_skybg_09_10_ph_30um.dat,,data);| |1.2|&ref(ch_skybg_12_10_ph_nir.dat,,data);|&ref(ch_skybg_12_10_ph_nband.dat,,data);|&ref(ch_skybg_12_10_ph_qband.dat,,data);|&ref(ch_skybg_12_10_ph_30um.dat,,data);| |1.5|&ref(ch_skybg_15_10_ph_nir.dat,,data);|&ref(ch_skybg_15_10_ph_nband.dat,,data);|&ref(ch_skybg_15_10_ph_qband.dat,,data);|&ref(ch_skybg_15_10_ph_30um.dat,,data);|
