Intra-pixel sensitivity in NIR detectors for NGST

Details Intra-pixel sensitivity in NIR detectors for NGST Intra-pixel sensitivity in NIR detectors for NGST

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4850.1001s&link_type=abstract

IR Space Telescopes and Instruments. Edited by John C. Mather . Proceedings of the SPIE, Volume 4850, pp. 1001-1007 (2003).

Astronomy and Astrophysics

Astronomy

Scientific paper

Intra-Pixel Sensitivity (IPS) is defined as the spatially varying response of the pixel to incoming flux. IPS plays a crucial role when the Point-Spread Function (PSF) is critically, or under-, sampled. Variations in IPS lead to photometric and astrometric errors. The Next Generation Space Telescope (NGST) requires high quality photometry and astrometry, so an accurate estimation of the IPS function is necessary for a successful NGST mission. Photo-electrons generated in a pixel may be detected in the depletion region (detection of the flux) of the same pixel, or might diffuse and end up in the microstructure of the detector, the electric field distribution therein, wavelength of the incident radiation, and diffusion processes of the excess charge carriers generated determines the IPS function of a pixel that can vary from pixel to pixel. The total detected flux is proportional to the convolution of the PSF and the IPS function. If we approximate the profile of the PSF, then the problem of determining the IPS function reduces to deconvolving using the experimentally obtained Sensitivity variation profile and the calculated PSF. We aim to obtain a highly undersampled PSF, scan it over a single pixel on a grid of 10 x 10 points, and retrieving IPS function using deconvolution. We present our results, experiment design, and the scope of further work, using an NGST detector, to estimate the IPS function at various wavelengths.

Affiliated with

Also associated with

No associations

Rating

Intra-pixel sensitivity in NIR detectors for NGST does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Intra-pixel sensitivity in NIR detectors for NGST, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intra-pixel sensitivity in NIR detectors for NGST will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1170370