PREPRINT
23D8D53D-B637-41E8-B0C2-BF14AF43642B

Absolute Flux Calibrations for the Nancy Grace Roman Space Telescope Coronagraph Instrument

Lindsey Payne, Robert T. Zellem, Marie Ygouf, Bruce Macintosh
arXiv:2207.03607

Submitted on 7 July 2022

Abstract

The Nancy Grace Roman Space Telescope's (Roman) Coronagraph Instrument is a technology demonstration equipped to achieve flux contrast levels of up to 109. 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.

Preprint

Comment: Submitted to SPIE Astronomical Telescopes + Instrumentation 2022

Subject: Astrophysics - Instrumentation and Methods for Astrophysics

URL: https://arxiv.org/abs/2207.03607