Improved Sensitivity Calibration of SBC Prisms

Details Improved Sensitivity Calibration of SBC Prisms Improved Sensitivity Calibration of SBC Prisms

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hst..prop11325k&link_type=abstract

HST Proposal ID #11325. Cycle 16

Computer Science

Scientific paper

We propose to improve the sensitivity calibration of the SBC PR110L and PR130L prisms by observing an additional calibrator target. Observations with the ACS/SBC PR110L of two G-type stars GO-10114, GO-10718 showed a pronounced peak of counts at wavelength of about 3500A. An analysis of the existing flux standard star observations showed that this peak is mainly caused by a red leak increased sensitivity of the MAMA detectors. Additionally, there are indications of a scattered light component which is worse for bluer stars. With this proposal we aim to improve on the existing sensitivity calibrations for wavelength greater than 1800A in order to better characterize the red leak. Existing observations of flux standard stars are covering rather blue white dwarf stars. In this proposal we aim to observe a much redder star. The most suitable star we identified is 16 Cyg B, a solar analog.;

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