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Correcting stis ccd point-source spectra for cte loss
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bohlin, Ralph C. Goudfrooij, Paul Maiz-Apellaniz Sr., Jesus |
| Copyright Year | 2006 |
| Description | We review the on-orbit spectroscopic observations that are being used to characterize the Charge Transfer Efficiency (CTE) of the STIS CCD in spectroscopic mode. We parameterize the CTE-related loss for spectrophotometry of point sources in terms of dependencies on the brightness of the source, the background level, the signal in the PSF outside the standard extraction box, and the time of observation. Primary constraints on our correction algorithm are provided by measurements of the CTE loss rates for simulated spectra (images of a tungsten lamp taken through slits oriented along the dispersion axis) combined with estimates of CTE losses for actual spectra of spectrophotometric standard stars in the first order CCD modes. For point-source spectra at the standard reference position at the CCD center, CTE losses as large as 30% are corrected to within approx.1% RMS after application of the algorithm presented here, rendering the Poisson noise associated with the source detection itself to be the dominant contributor to the total flux calibration uncertainty. |
| File Size | 587975 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20060047798 |
| Archival Resource Key | ark:/13960/t7vm9735r |
| Language | English |
| Publisher Date | 2006-03-01 |
| Access Restriction | Open |
| Subject Keyword | Charge Coupled Devices Point Sources Brightness Extraction Stellar Spectrophotometry Parameterization Charge Transfer Correction Estimates Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
