Bayliss, D;
O'Brien, SM;
Bryant, E;
Wheatley, P;
West, R;
McCormac, J;
Chote, P;
... Kendall, A; + view all
(2022)
High precision ground-based CCD photometry from the Next
Generation Transit Survey.
In: Holland, Andrew D and Beletic, James, (eds.)
Proceedings SPIE 12191:X-Ray, Optical, and Infrared Detectors for Astronomy X.
(pp. 121911A-1-121911A-15).
SPIE: Montréal, Québec, Canada.
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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.
| Type: | Proceedings paper |
|---|---|
| Title: | High precision ground-based CCD photometry from the Next Generation Transit Survey |
| Event: | SPIE Astronomical Telescopes + Instrumentation, 2022 |
| Dates: | 17 Jul 2022 - 23 Jul 2022 |
| ISBN-13: | 9781510653634 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2628966 |
| Publisher version: | http://dx.doi.org/10.1117/12.2628966 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | CCD, CMOS, Photometry, Visible, Exoplanets |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10191993 |
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