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Toward Efficient Detection of Small Near-Earth Asteroids Using the Zwicky Transient Facility (ZTF)
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Number of Authors: 262019 (English)In: Publications of the Astronomical Society of the Pacific, ISSN 0004-6280, E-ISSN 1538-3873, Vol. 131, no 1001, article id 078002Article in journal (Refereed) Published
Abstract [en]

We describe ZStreak, a semi-real-time pipeline specialized in detecting small, fast-moving, near-Earth asteroids (NEAs), which is currently operating on the data from the newly commissioned Zwicky Transient Facility (ZTF) survey. Based on a prototype originally developed by Waszczak et al. (2017) for the Palomar Transient Factory (PTF), the predecessor of ZTF, ZStreak features an improved machine-learning model that can cope with the 10x data rate increment between PTF and ZTF. Since its first discovery on 2018 February 5 (2018 CL), ZTF/ZStreak has discovered 45 confirmed new NEAs over a total of 232 observable nights until 2018 December 31. Most of the discoveries are small NEAs, with diameters less than similar to 100. m. By analyzing the discovery circumstances, we find that objects having the first to last detection time interval under 2. hr are at risk of being lost. We will further improve real-time follow-up capabilities, and work on suppressing false positives using deep learning.

Place, publisher, year, edition, pages
2019. Vol. 131, no 1001, article id 078002
Keywords [en]
surveys, minor planets, asteroids: general
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-170070DOI: 10.1088/1538-3873/ab1b18ISI: 000469026100001OAI: oai:DiVA.org:su-170070DiVA, id: diva2:1335090
Available from: 2019-07-03 Created: 2019-07-03 Last updated: 2019-07-03Bibliographically approved

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Ye, QuanzhiPrince, Thomas A.Kupfer, Thomas
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Department of AstronomyThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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