Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/207420
Title: Building the Evryscope: Hardware Design and Performance
Author: Ratzloff, Jeffrey K.
Law, Nicholas M.
Fors Aldrich, Octavi
Corbett, Henry T.
Howard, Ward S.
Ser Badia, Daniel del
Haislip, Joshua
Keywords: Telescopis
Eclipsis
Detectors
Telescopes
Eclipses
Detectors
Issue Date: 1-Jul-2019
Publisher: Astronomical Society of the Pacific
Abstract: The Evryscope is a telescope array designed to open a new parameter space in optical astronomy, detecting short-timescale events across extremely large sky areas simultaneously. The system consists of a 780 MPix 22-camera array with an 8150 sq. deg. field of view, 13″ per pixel sampling, and the ability to detect objects down to {m}g\prime ≃ 16 in each 2-minute dark-sky exposure. The Evryscope, covering 18,400 sq. deg. with hours of high-cadence exposure time each night, is designed to find the rare events that require all-sky monitoring, including transiting exoplanets around exotic stars like white dwarfs and hot subdwarfs, stellar activity of all types within our galaxy, nearby supernovae, and other transient events such as gamma-ray bursts and gravitational-wave electromagnetic counterparts. The system averages 5000 images per night with ∼300,000 sources per image, and to date has taken over 3.0M images, totaling 250 TB of raw data. The resulting light curve database has light curves for 9.3M targets, averaging 32,600 epochs per target through 2018. This paper summarizes the hardware and performance of the Evryscope, including the lessons learned during telescope design, electronics design, a procedure for the precision polar alignment of mounts for Evryscope-like systems, robotic control and operations, and safety and performance-optimization systems. We measure the on-sky performance of the Evryscope, discuss its data analysis pipelines, and present some example variable star and eclipsing binary discoveries from the telescope. We also discuss new discoveries of very rare objects including two hot subdwarf eclipsing binaries with late M-dwarf secondaries (HW Vir systems), two white dwarf/hot subdwarf short-period binaries, and four hot subdwarf reflection binaries. We conclude with the status of our transit surveys, M-dwarf flare survey, and transient detection.
Note: Reproducció del document publicat a: https://doi.org/10.1088/1538-3873/ab19d0
It is part of: Publications of the Astronomical Society of the Pacific, 2019, vol. 131, num.1001
URI: http://hdl.handle.net/2445/207420
Related resource: https://doi.org/10.1088/1538-3873/ab19d0
ISSN: 0004-6280
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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