1 / 11

CCAT Sensitivities

CCAT Sensitivities. Last Update: 12-May-05. TLH. Table 1: CCAT Baseline Sensitivity.

arnon
Download Presentation

CCAT Sensitivities

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CCAT Sensitivities Last Update: 12-May-05 TLH

  2. Table 1: CCAT Baseline Sensitivity Sensitivity selected on the basis of appropriate PWV for that wavelength. NEFD is 1-sigma in 1 second. Confusion limit (CL) is for 30 beams/source. Time to CL is for S/N = 5. Source density is for all sources  CL flux.

  3. Table 2: CCAT Sensitivity vs. PWV Bold numbers are the baseline sensitivity for CCAT. Assumptions: 30 deg from zenith, 12 mm surface rms, chopping/difference loss of 1.414, 5000m altitude for transmission calculations (but consistent with tau(222 mm) measurements from Sairecabur). PWV varies from 0.125 to 2.0 mm.

  4. Table 3: CCAT Confusion Limits From Andrew Blain, 3/28/05. Updated to be consistent with beam size definition used in sensitivity calculation.

  5. Figure 1: CCAT Sensitivity Confusion limits for Spitzer, Herschel, APEX, JCMT, and LMT are shown.

  6. Figure 2: CCAT Sensitivity Confusion limits for Spitzer, Herschel, APEX, JCMT, and LMT are shown.

  7. Figure 3: Mapping Speed Mapping speed (Field-of-view*NEFD-2) of CCAT vs. ALMA. Assumes 12-m dish for ALMA and 150x150 array sampled at 2-pixels/resolution element for a 25-m CCAT. The table at right represents the speed gain for CCAT over ALMA (ratio of the mapping speeds).

  8. Figure 4: NEFD vs. PWV Changing in CCAT sensitivity vs. precipitable water vapor for different operating wavelengths. NEFD is the flux density for 1-sigma in 1 second.

  9. Figure 5: Performance vs. Surface RMS Changing in CCAT sensitivity vs. total rms surface accuracy for different operating wavelengths. NEFD is the flux density for 1-sigma in 1 second.

  10. Figure 6: Atmospheric Transmission Atmospheric transmission for different amounts of precipitable water vapor. The horizontal red bars represent the adopted bandpasses and the average transmission for 0.25 mm PWV.

  11. Table 4: CCAT Line Sensitivity R = 1000 spectroscopic sensitivity for CCAT. Numbers are for 1-sigma in 1-second. Sensitivity selected on the basis of appropriate PWV for that wavelength. Note: these numbers are for a non-heterodyne spectrograph.

More Related