Demonstrating High-precision Photometry with a CubeSat: ASTERIA Observations of 55 Cancri e

Knapp, Mary; Seager, Sara; Demory, Brice-Olivier; Krishnamurthy, Akshata; Smith, Matthew W.; Pong, Christopher M.; Bailey, Vanessa P.; Donner, Amanda; Pasquale, Peter Di; Campuzano, Brian; Smith, Colin; Luu, Jason; Babuscia, Alessandra; Bocchino, Robert L., Jr.; Loveland, Jessica; Colley, Cody; Gedenk, Tobias; Kulkarni, Tejas; Hughes, Kyle; White, Mary; ... (2020). Demonstrating High-precision Photometry with a CubeSat: ASTERIA Observations of 55 Cancri e. The astronomical journal, 160(1), p. 23. American Astronomical Society 10.3847/1538-3881/ab8bcc

Preview	Text 2005.14155.pdf - Accepted Version Available under License Publisher holds Copyright. Download (3MB) | Preview
	Text Knapp_2020_AJ_160_23.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (2MB)

Arcsecond Space Telescope Enabling Research In Astrophysics (ASTERIA) is a 6U CubeSat space telescope (10 cm × 20 cm × 30 cm, 10 kg). ASTERIA's primary mission objective was demonstrating two key technologies for reducing systematic noise in photometric observations: high-precision pointing control and high-stability thermal control. ASTERIA demonstrated 0farcs5 rms pointing stability and ±10 mK thermal control of its camera payload during its primary mission, a significant improvement in pointing and thermal performance compared to other spacecraft in ASTERIA's size and mass class. ASTERIA launched in 2017 August and deployed from the International Space Station in 2017 November. During the prime mission (2017 November–2018 February) and the first extended mission that followed (2018 March–2018 May), ASTERIA conducted opportunistic science observations, which included the collection of photometric data on 55 Cancri, a nearby exoplanetary system with a super-Earth transiting planet. The 55 Cancri data were reduced using a custom pipeline to correct complementary metal-oxide semiconductor (CMOS) detector column-dependent gain variations. A Markov Chain Monte Carlo approach was used to simultaneously detrend the photometry using a simple baseline model and fit a transit model. ASTERIA made a marginal detection of the known transiting exoplanet 55 Cancri e (~2 ${R}_{\oplus }$), measuring a transit depth of 374 ± 170 ppm. This is the first detection of an exoplanet transit by a CubeSat. The successful detection of super-Earth 55 Cancri e demonstrates that small, inexpensive spacecraft can deliver high-precision photometric measurements.

Interest & Impact

Downloads

113 since deposited on 13 Apr 2021
13 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item