Sensitivities and Speeds for Future Space- and Ground-based Imaging Surveys

Details Sensitivities and Speeds for Future Space- and Ground-based Imaging Surveys Sensitivities and Speeds for Future Space- and Ground-based Imaging Surveys

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19911604b&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #116.04; Bulletin of the American Astronomical Society, Vol. 33, p.1480

Astronomy and Astrophysics

Astronomy

Scientific paper

I analyse the capabilities of the proposed SNAP and LSST imaging survey telescopes using the ETC++ exposure-time calculator software. These programs can calculate sensitivities for point-source photometry or astrometry, and for photometry or weak-lensing shape measurements of galaxies. The calculations properly account for diffraction, seeing, undersampling, cosmic rays, and intrapixel sensitivity variations. The relative strengths of the ground-based and spaced-based approaches are readily apparent, and we can also address common questions such as the best choice of pixel scale and dithering pattern.

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