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Proceedings Paper

Unveiling the dynamic infrared sky with Gattini-IR
Author(s): Anna M. Moore; Mansi K. Kasliwal; Christopher R. Gelino; Jacob E. Jencson; Mike I. Jones; J. Davy Kirkpatrick; Ryan M. Lau; Eran Ofek; Yuri Petrunin; Roger Smith; Valery Terebizh; Eric Steinbring; Lin Yan
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Paper Abstract

While optical and radio transient surveys have enjoyed a renaissance over the past decade, the dynamic infrared sky remains virtually unexplored. The infrared is a powerful tool for probing transient events in dusty regions that have high optical extinction, and for detecting the coolest of stars that are bright only at these wavelengths. The fundamental roadblocks in studying the infrared time-domain have been the overwhelmingly bright sky background (250 times brighter than optical) and the narrow field-of-view of infrared cameras (largest is 0.6 sq deg). To begin to address these challenges and open a new observational window in the infrared, we present Palomar Gattini-IR: a 25 sq degree, 300mm aperture, infrared telescope at Palomar Observatory that surveys the entire accessible sky (20,000 sq deg) to a depth of 16.4 AB mag (J band, 1.25μm) every night. Palomar Gattini-IR is wider in area than every existing infrared camera by more than a factor of 40 and is able to survey large areas of sky multiple times. We anticipate the potential for otherwise infeasible discoveries, including, for example, the elusive electromagnetic counterparts to gravitational wave detections. With dedicated hardware in hand, and a F/1.44 telescope available commercially and cost-effectively, Palomar Gattini-IR will be on-sky in early 2017 and will survey the entire accessible sky every night for two years. We present an overview of the pathfinder Palomar Gattini-IR project, including the ambitious goal of sub-pixel imaging and ramifications of this goal on the opto-mechanical design and data reduction software.

Palomar Gattini-IR will pave the way for a dual hemisphere, infrared-optimized, ultra-wide field high cadence machine called Turbo Gattini-IR. To take advantage of the low sky background at 2.5 μm, two identical systems will be located at the polar sites of the South Pole, Antarctica and near Eureka on Ellesmere Island, Canada. Turbo Gattini-IR will survey 15,000 sq. degrees to a depth of 20AB, the same depth of the VISTA VHS survey, every 2 hours with a survey efficiency of 97%.

Paper Details

Date Published: 8 August 2016
PDF: 12 pages
Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99062C (8 August 2016); doi: 10.1117/12.2233694
Show Author Affiliations
Anna M. Moore, Caltech Optical Observatories (United States)
Mansi K. Kasliwal, California Institute of Technology (United States)
Christopher R. Gelino, California Institute of Technology (United States)
Jacob E. Jencson, California Institute of Technology (United States)
Mike I. Jones, Precision Optics of Azle LLC (United States)
J. Davy Kirkpatrick, California Institute of Technology (United States)
Ryan M. Lau, Jet Propulsion Lab. (United States)
Eran Ofek, Weizmann Institute of Science (Israel)
Yuri Petrunin, Telescope Engineering Co. (United States)
Roger Smith, Caltech Optical Observatories (United States)
Valery Terebizh, Crimean Astrophysical Observatory (Ukraine)
Eric Steinbring, NRC - Herzberg Astronomy & Astrophysics (Canada)
Lin Yan, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 9906:
Ground-based and Airborne Telescopes VI
Helen J. Hall; Roberto Gilmozzi; Heather K. Marshall, Editor(s)

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