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24 April 2024

» arxiv » 1904.9645

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Towards Efficient Detection of Small Near-Earth Asteroids Using the Zwicky Transient Facility (ZTF)
Quanzhi Ye ; Frank J. Masci ; Hsing Wen Lin ; Bryce Bolin ; Chan-Kao Chang ; Dmitry A. Duev ; George Helou ; Wing-Huen Ip ; David L. Kaplan ; Emily Kramer ; Ashish Mahabal ; Chow-Choong Ngeow ; Avery J. Nielsen ; Thomas A. Prince ; Hanjie Tan ; Ting-Shuo Yeh ; Eric C. Bellm ; Richard Dekany ; Matteo Giomi ; Matthew J. Graham ; Shrinivas R. Kulkarni ; Thomas Kupfer ; Russ R. Laher ; Ben Rusholme ; David L. Shupe ; Charlotte Ward ;
Date:	21 Apr 2019
Abstract:	We describe ZStreak, a semi-real-time pipeline specialized in detecting small, fast-moving near-Earth asteroids (NEAs) that 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 $10 imes$ 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 $sim100$ 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.
Source:	arXiv, 1904.9645
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