Absolute flux calibrations for the Nancy Grace Roman Space Telescope Coronagraph Instrument

Lindsey Payne; Robert Zellem; Marie Ygouf; Bruce Macintosh

doi:10.1117/12.2628627

29 August 2022 Absolute flux calibrations for the Nancy Grace Roman Space Telescope Coronagraph Instrument

Lindsey Payne, Robert Zellem, Marie Ygouf, Bruce Macintosh

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 121884G (2022) https://doi.org/10.1117/12.2628627
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

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 ∼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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Lindsey Payne, Robert Zellem, Marie Ygouf, and Bruce Macintosh "Absolute flux calibrations for the Nancy Grace Roman Space Telescope Coronagraph Instrument", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 121884G (29 August 2022); https://doi.org/10.1117/12.2628627

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