1 / 7

ETC Block Diagram

ETC Block Diagram. Spectra Type Stellar (50 stellar types) Galaxies (elliptical, spiral) QSO Luminosity Profile point source extended (uniform, gaussian, elliptical, exponential) Redshift. Source Spectrum is derived from:. Sky Background Spectrum based on specified observing parameters.

brody
Télécharger la présentation

ETC Block Diagram

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. ETC Block Diagram

  2. Spectra Type Stellar (50 stellar types) Galaxies (elliptical, spiral) QSO Luminosity Profile point source extended (uniform, gaussian, elliptical, exponential) Redshift Source Spectrum is derived from:

  3. Sky Background Spectrum based on specified observing parameters • Lunar Phase • Moon-target separation • Airmass • Solar cycle (min, max, average)

  4. System Throughput derived from LSST system specifications • Telescope Aperture • Optics (Lenses and Mirrors) • Filter Transmission – U G R I Z Y • Detector Sensitivity

  5. Atmospheric TransmissionModel • Base Sky Transmission Curve • Clouds • Humidity • Airmass

  6. Signal-to-noise Analysis • Select optimal aperture • Sum weighted source count • Sum weighted sky background count • Add sources of noise: • Poisson noise (source and background) • Sky Estimation Noise • Readout Noise • Dark Current Noise

  7. Weighted source noise Weighted background noise Dark current noise Readout noise Sky subtraction noise Poisson Poisson 0.0015 e-/s/pixel 5 e-/pixel 1/sky aperture Sources of Noise

More Related