A5087165099- Adaptive optics and wavefront sensing
- Stellar, planetary, and galactic studies
- CCD and CMOS Imaging Sensors
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Astronomical Observations and Instrumentation
- Calibration and Measurement Techniques
- Impact of Light on Environment and Health
- Earthquake Detection and Analysis
- History and Developments in Astronomy
- Infrared Target Detection Methodologies
- Planetary Science and Exploration
Macquarie University
2020-2024
Abstract We give an overview and describe the rationale, methods, testing of Hubble Space Telescope (HST) Archival Legacy project “SKYSURF.” SKYSURF uses HST’s unique capability as absolute photometer to measure ∼0.2–1.7 μ m sky-surface brightness (sky-SB) from 249,861 WFPC2, ACS, WFC3 exposures in ∼1400 independent HST fields. SKYSURF’s panchromatic data set is designed constrain discrete diffuse UV near-IR sky components: Zodiacal Light (ZL), Kuiper Belt Objects (KBOs), Diffuse Galactic...
Abstract The SKYSURF project constrained extragalactic background light and diffuse (DL) with the vast archive of Hubble Space Telescope (HST) images. Thermal emission from HST itself introduces an additional uncertain hinders accurate measurement DL level. Here, we use archival Wide Field Camera 3 (WFC3)/IR engineering data to investigate model changes in temperature various components HSTs optical path as a function time (solar cycle) year (Earth–Sun distance). We also specifically HST's...
We present the first results from HST Archival Legacy project "SKYSURF." As described in Windhorst et al. 2022, SKYSURF utilizes large archive to study diffuse UV, optical, and near-IR backgrounds foregrounds detail. Here we utilize SKYSURF's sky-surface brightness measurements constrain level of Extragalactic Background Light (EBL). Our have been verified an accuracy better than 1%, which when combined with systematic errors associated HST, sky uncertainties $\sim$2-4% $\simeq$ 0.005 MJy/sr...
Abstract The diffuse, unresolved sky provides most of the photons that Hubble Space Telescope (HST) receives, yet remains poorly understood. HST Archival Legacy program SKYSURF aims to measure 0.2–1.6 μ m surface brightness (sky-SB) from over 140,000 images. We describe a sky-SB measurement algorithm designed for is able recover input simulated images within 1% uncertainty. present our measurements estimated using this on entire database. Comparing spectral energy distribution (SED)...
Abstract Observing stars and satellites in optical wavelengths during the day (optical daytime astronomy) has begun a resurgence of interest. The recent dramatic dimming event Betelgeuse spurred interest continuous monitoring brightest variable stars, even when an object is only visible due to their proximity Sun. In addition, exponential increase number being launched into low Earth orbit years driven astronomy for detection space situational awareness (SSA) networks. this paper we explore...
Abstract The sky observed by space telescopes in Low Earth Orbit (LEO) can be dominated stray light from multiple sources including Earth, Sun, and Moon. This presents a significant challenge to missions that aim make secure measurement of the extragalactic background (EBL). In this work, we quantify impact on observations made Hubble Space Telescope (HST) Advanced Camera for Surveys. By selecting orbital parameters, successfully isolate images with contain minimal high levels earthshine....
The SKYSURF project constrained extragalactic background light (EBL) and diffuse with the vast archive of Hubble Space Telescope (HST) images. Thermal emission from HST itself introduces an additional uncertain hinders accurate measurement level. Here, we use archival WFC3/IR engineering data to investigate model changes in temperature various components HST's optical path as a function time (solar cycle) year (Earth-Sun distance). We also specifically orbital phase since Earth occultation....
The Huntsman Telescope, located at Siding Spring Observatory in Australia, is a system of ten telephoto Canon lenses designed for low surface brightness imaging the Southern sky. Based upon Dragonfly Telephoto Array, refractive lens-based provides an obstruction free optical path, which reduces number scattering surfaces and allows easier access to lower levels. In this proceeding, we present analysis impact flat fielding uncertainty on limiting We show that fairly standard set flat-field...
The Huntsman Telescope* is a wide field imager based on the successful Dragonfly Telescope concept.<sup>1</sup> It consists of an array co-aligned telephoto DSLR lenses with cooled CCD cameras. ten 140 mm apertures have combined collecting area equivalent to 0.5 m class telescope but lower stray light levels than typical this size.<sup>1, 2</sup> Its primary purpose low surface brightness imaging nearby galaxies, and it also observes exoplanet transits other optical transients.
We give an overview and describe the rationale, methods, testing of Hubble Space Telescope (HST) Archival Legacy project "SKYSURF." SKYSURF uses HST's unique capability as absolute photometer to measure ~0.2-1.7 $μ$m sky surface brightness (SB) from 249,861 WFPC2, ACS, WFC3 exposures in ~1400 independent HST fields. SKYSURF's panchromatic dataset is designed constrain discrete diffuse UV near-IR components: Zodiacal Light (ZL; inner Solar System), Kuiper Belt Objects (KBOs; outer Diffuse...
We present the first results from HST Archival Legacy project "SKYSURF." As described in Windhorst et al. 2022, SKYSURF utilizes large archive to study diffuse UV, optical, and near-IR backgrounds foregrounds detail. Here we utilize SKYSURF's sky-surface brightness measurements constrain level of Extragalactic Background Light (EBL). Our have been verified an accuracy better than 1%, which when combined with systematic errors associated HST, sky uncertainties $\sim$2-4% $\simeq$ 0.005 MJy/sr...
The diffuse, unresolved sky provides most of the photons that Hubble Space Telescope (HST) receives, yet remains poorly understood. HST Archival Legacy program SKYSURF aims to measure 0.2-1.6 $μ$m surface brightness (sky-SB) from over 140,000 images. We describe a sky-SB measurement algorithm designed for is able recover input simulated images within 1% uncertainty. present our measurements estimated using this on entire database. Comparing spectral energy distribution (SED) literature shows...