High precision ground-based CCD photometry from the Next Generation Transit Survey

Daniel Bayliss; Sean M. O'Brien; Edward Bryant; Peter Wheatley; Richard West; James McCormac; Paul Chote; Sam Gill; David R. Anderson; Adam Wise; Ines Juvan-Beaulieu; Colin Coates; Edward Gillen; Alexis M. S. Smith; James S. Jenkins; Maximiliano Moyano; Douglas R. Alves; Matthew R. Burleigh; Michael R. Goad; Sarah L. Casewell; Jack Acton; Rosanna L. Tilbrook; Beth A. Henderson; Alicia Kendall

doi:10.1117/12.2628966

29 August 2022 High precision ground-based CCD photometry from the Next Generation Transit Survey

Daniel Bayliss, Sean M. O'Brien, Edward Bryant, Peter Wheatley, Richard West, James McCormac, Paul Chote, Sam Gill, David R. Anderson, Adam Wise, Ines Juvan-Beaulieu, Colin Coates, Edward Gillen, Alexis M. S. Smith, James S. Jenkins, Maximiliano Moyano, Douglas R. Alves, Matthew R. Burleigh, Michael R. Goad, Sarah L. Casewell, Jack Acton, Rosanna L. Tilbrook, Beth A. Henderson, Alicia Kendall

Author Affiliations +

Proceedings Volume 12191, X-Ray, Optical, and Infrared Detectors for Astronomy X; 121911A (2022) https://doi.org/10.1117/12.2628966
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

The Next Generation Transit Survey (NGTS) has now been operating for six years, discovering and characterizing transiting exoplanets around bright stars. We outline the NGTS project, including the Andor CCD cameras used to perform high-precision time-series photometry. We quantify the photometric precision for a sample of over 20,000 bright star observations. We find for single NGTS telescope observations we achieve a 30-minute photometric precision of 400 ppm at low airmass. This is in good agreement with the photometric noise predicted using a four-component noise model. We find that the photometric noise for bright stars (G < 12) is dominated by atmospheric scintillation. We also present details of the NGTS multi-telescope observing mode, whereby 12 telescopes can be used simultaneously on a single target star to achieve a 30-minute photometric precision of 100 ppm. Finally, we describe a new generation scientific CMOS camera that we will be testing on-sky at the NGTS facility to determine if it can compete with state-of-the-art CCD cameras used for high precision bright star photometry.

Conference Presentation

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Daniel Bayliss, Sean M. O'Brien, Edward Bryant, Peter Wheatley, Richard West, James McCormac, Paul Chote, Sam Gill, David R. Anderson, Adam Wise, Ines Juvan-Beaulieu, Colin Coates, Edward Gillen, Alexis M. S. Smith, James S. Jenkins, Maximiliano Moyano, Douglas R. Alves, Matthew R. Burleigh, Michael R. Goad, Sarah L. Casewell, Jack Acton, Rosanna L. Tilbrook, Beth A. Henderson, and Alicia Kendall "High precision ground-based CCD photometry from the Next Generation Transit Survey", Proc. SPIE 12191, X-Ray, Optical, and Infrared Detectors for Astronomy X, 121911A (29 August 2022); https://doi.org/10.1117/12.2628966

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