Lee R. Spitler

The First Observations of Moonlit Satellites

Sarah Caddy, Stephen Catsamas, Michele Trenti, Lee R. Spitler et autres

Optical Space Domain Awareness (SDA) operations have traditionally relied on Sunlit passes near the terminator, limiting continuous tracking of low-Earth orbit (LEO) satellites. In this work, we show that by accounting for all four major illumination sources: Sunlight, Earthshine, Moonlight, and Lunar-Earthshine, …

Daytime Photometry of Starlink Satellites with the Huntsman Telescope Pathfinder

Sarah Caddy, Lee R. Spitler

Abstract The rapid increase in satellite launches in recent years, and the pressure of launches planned into the next decade, demands an improvement in the efficiency of space domain awareness facilities. Optical facilities form an important component of global space domain awareness …

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Compact [O iii ] Emission-line Regions (“Green Seeds”) in Hα Emitters at Cosmic Noon from JWST Observations

Nuo Chen, Kentaro Motohara, Lee R. Spitler, Matthew A. Malkan

Abstract We present a rest-frame optical, spatially resolved analysis of more than 100 Hα emitters (HAEs) at z ∼ 2.2 in the ZFOURGE-CDFS field using NIRCam imaging from the JWST Advanced Deep Extragalactic Survey. The ultradeep, high-resolution data give us maps of …

An optically led search for kilonovae to z∼0.3 with the Kilonova and Transients Programme (KNTraP)

Natasha Van Bemmel, Jielai Zhang, Jeff Cooke, A. Rest et autres

ABSTRACT Compact binary mergers detectable in gravitational waves can be accompanied by a kilonova, an electromagnetic transient powered by radioactive decay of newly synthesised r-process elements. A few kilonova candidates have been observed during short gamma-ray burst follow-up, and one found associated …

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Omnidirectional Wide-angle Locator (OWL): A Linkage Driven Fast Steering Mirror for Optical Imaging Payloads

Timothy Chin, Lee R. Spitler, James Buttenshaw, Ben Miller et autres

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Engineering Excellence on Optical Head System Development: A Leap for Lunar Landings

Lee R. Spitler, Zhemin Cai, Yevgen Kripak, Yizheng Wang et autres

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Mapping and Navigating the World of Star Trackers: A Snapshot Survey of the Current State of the Art, and a Proposed Categorisation Framework for Future Research

S. E. Kenyon, Lee R. Spitler

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Coordinated Ground and Space-Based Observations of Resident Space Objects

Sarah Caddy, Lee R. Spitler, Sam Kirkwood, James Allworth et autres

An Optically Led Search for Kilonovae to z$\sim$0.3 with the Kilonova and Transients Program (KNTraP)

Natasha Van Bemmel, Jielai Zhang, Jeff Cooke, A. Rest et autres

Compact binary mergers detectable in gravitational waves can be accompanied by a kilonova, an electromagnetic transient powered by radioactive decay of newly synthesised r-process elements. A few kilonova candidates have been observed during short gamma-ray burst follow-up, and one found associated with …

Compact [OIII] emission-line regions ("Green Seeds") in $\mathrm{Hα}$ emitters at Cosmic Noon from JWST Observations

Nuo Chen, Kentaro Motohara, Lee R. Spitler, Matthew A. Malkan

We present a rest-frame optical, spatially resolved analysis of more than 100 $\mathrm{Hα}$ emitters (HAEs) at $z\sim2.2$ in the ZFOURGE-CDFS field using NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES). The ultra-deep, high-resolution data gives us maps of the resolved …

Toward Unveiling Cosmic Reionization: The Ionizing Photon Production Efficiency (ξ ion) of Low-mass Hα Emitters at z ∼ 2.3

Nuo Chen, Kentaro Motohara, Lee R. Spitler, Kimihiko Nakajima et autres

Abstract We investigate the galaxy properties of ∼400 low-mass (<109 M ⊙) Hα emitters (HAEs) at z ∼ 2.3 in the ZFOURGE survey. The selection of these HAEs is based on the excess in the observed K s broadband flux compared to …

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Multiple Emission Lines of Hα Emitters at z ∼ 2.3 from the Broad- and Medium-band Photometry in the ZFOURGE Survey

Nuo Chen, Kentaro Motohara, Lee R. Spitler, Kimihiko Nakajima et autres

Abstract We present a multiple emission line study of ∼1300 Hα emitters (HAEs) at z ∼ 2.3 in the ZFOURGE survey. In contrast to the traditional spectroscopic method, our sample is selected based on the flux excess in the ZFOURGE K s …

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