Absolute Flux Calibrations for the Nancy Grace Roman Space Telescope Coronagraph Instrument
The Nancy Grace Roman Space Telescope's (Roman) Coronagraph Instrument is a technology demonstration equipped to achieve flux contrast levels of up to 10\(^{-9}\). This precision depends upon the quality of observations and their resultant on-sky corrections via an absolute flux calibration (AF...
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| creator | Payne, Lindsey Zellem, Robert T Ygouf, Marie Macintosh, Bruce |
| description | The Nancy Grace Roman Space Telescope's (Roman) Coronagraph Instrument is a technology demonstration equipped to achieve flux contrast levels of up to 10\(^{-9}\). This precision depends upon the quality of observations and their resultant on-sky corrections via an absolute flux calibration (AFC). Our plan utilizes 10 dim and 4 bright standard photometric calibrator stars from Hubble Space Telescope's (HST) CALSPEC catalog to yield a final AFC error of 1.94\% and total observation time of \(\sim\)22 minutes. Percent error accounts for systematic uncertainties (filters, upstream optics, quantum efficiency) in Roman component instrumentation along with shot noise for a signal to noise ratio (SNR) of 500. |
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| subjects | Calibration Coronagraphs Hubble Space Telescope Quantum efficiency Shot noise Signal to noise ratio Space telescopes |
| title | Absolute Flux Calibrations for the Nancy Grace Roman Space Telescope Coronagraph Instrument |
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