316 citations · 2.2k across the 48 of their papers we have counts for
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The Adaptive Optics System for the Gemini Infrared Multi-Object Spectrograph: Performance Modeling
Uriel Conod, Kate Jackson, Paolo Turri +7
The Gemini Infrared Multi-Object Spectrograph (GIRMOS) will be a near-infrared, multi-object, medium spectral resolution, integral field spectrograph (IFS) for Gemini North Telesco…
A Near-Infrared Pyramid Wavefront Sensor for the MMT
Jacob Taylor, Suresh Sivanandam, Narsireddy Anugu +8
The MMTO Adaptive optics exoPlanet characterization System (MAPS) is an ongoing upgrade to the 6.5-meter MMT Observatory on Mount Hopkins in Arizona. MAPS includes an upgraded adap…
Weak lensing in the blue: a counter-intuitive strategy for stratospheric observations
Mohamed M. Shaaban, Ajay S. Gill, Jacqueline McCleary +24
The statistical power of weak lensing measurements is principally driven by the number of high redshift galaxies whose shapes are resolved. Conventional wisdom and physical intuiti…
Optical Design and Wavelength Calibration of a DMD-based Multi-Object Spectrograph
Shaojie Chen, Matthew C. H. Leung, Xuefeng Yao +3
The multi-object spectrograph (MOS) has been the benchmark for the current generation of astronomical spectrographs, valued for its ability to acquire the spectra of hundreds of ob…
Gemini North Adaptive Optics (GNAO) facility overview and status updates
Gaetano Sivo, Julia Scharwächter, Manuel Lazo +54
The Gemini North Adaptive Optics (GNAO) facility is the upcoming AO facility for Gemini North providing a state-of-the-art AO system for surveys and time domain science in the era…
Astrophotonic Solutions for Spectral Cross-Correlation Techniques
Suresh Sivanandam, Ross Cheriton, Polina Zavyalova +7
Using photonic devices, we developed a new approach to traditional spectroscopy where the spectral cross-correlation with a template spectrum can be done entirely on-device. By cre…
A low-cost ultraviolet-to-infrared absolute quantum efficiency characterization system of detectors
Ajay S. Gill, Mohamed M. Shaaban, Aaron Tohuvavohu +8
We present a low-cost ultraviolet to infrared absolute quantum efficiency detector characterization system developed using commercial off-the-shelf components. The key components o…
Fibre Fabry-Pérot Astrophotonic Correlation Spectroscopy for Remote Gas Identification and Radial Velocity Measurements
Ross Cheriton, Adam Densmore, Suresh Sivanandam +5
We present a novel remote gas detection and identification technique based on correlation spectroscopy with a piezoelectric tunable fibre-optic Fabry-Pérot filter. We show that the…
Simultaneous estimation of segmented telescope phasing errors and non-common path aberrations from adaptive optics corrected images
Masen Lamb, Carlos Correia, Suresh Sivanandam +2
We investigate the focal plane wavefront sensing technique, known as Phase Diversity, at the scientific focal plane of a segmented mirror telescope with an adaptive optics (AO) sys…
Closed Loop Predictive Control of Adaptive Optics Systems with Convolutional Neural Networks
Robin Swanson, Masen Lamb, Carlos Correia +2
Predictive wavefront control is an important and rapidly developing field of adaptive optics (AO). Through the prediction of future wavefront effects, the inherent AO system servo-…
Design and development of a high-speed Visible Pyramid Wavefront Sensor for the MMT AO system
Narsireddy Anugu, Olivier Durney, Katie M. Morzinski +16
MAPS, MMT Adaptive optics exoPlanet characterization System, is the upgrade of legacy 6.5m MMT adaptive optics system. It is an NSF MSIP-funded project that includes (i) refurbishi…
Optical night sky brightness measurements from the stratosphere
Ajay Gill, Steven J. Benton, Anthony M. Brown +27
This paper presents optical night sky brightness measurements from the stratosphere using CCD images taken with the Super-pressure Balloon-borne Imaging Telescope (SuperBIT). The d…
Entering into the Wide Field Adaptive Optics Era on Maunakea
Gaetano Sivo, John Blakeslee, Jennifer Lotz +32
As part of the National Science Foundation funded "Gemini in the Era of MultiMessenger Astronomy" (GEMMA) program, Gemini Observatory is developing GNAO, a widefield adaptive optic…
Probing the Time Domain with High Spatial Resolution
J. P. Blakeslee, S. A. Rodney, J. M. Lotz +17
Two groundbreaking new facilities will commence operations early in the 2020s and thereafter define much of the broad landscape of US optical-infrared astronomy in the remaining de…
The Wide Integral Field Infrared Spectrograph: Commissioning Results and On-sky Performance
Suresh Sivanandam, Dae-Sik Moon, R. Elliot Meyer +11
We have recently commissioned a novel infrared ( m) integral field spectrograph (IFS) called the Wide Integral Field Infrared Spectrograph (WIFIS). WIFIS is a unique in…
Gemini Infrared Multi-Object Spectrograph: Instrument Overview
Suresh Sivanandam, Scott Chapman, Luc Simard +27
The Gemini Infrared Multi-Object Spectrograph (GIRMOS) is a powerful new instrument being built to facility-class standards for the Gemini telescope. It takes advantage of the late…
The Development of WIFIS: a Wide Integral Field Infrared Spectrograph
Suresh Sivanandam, Richard C. Y. Chou, Dae-Sik Moon +7
We present the current results from the development of a wide integral field infrared spectrograph (WIFIS). WIFIS offers an unprecedented combination of etendue and spectral resolv…
Characterizing Near-Infrared Sky Brightness in the Canadian High Arctic
Suresh Sivanandam, James R. Graham, Roberto Abraham +5
We present the first measurements of the near-infrared (NIR), specifically the J-band, sky background in the Canadian High Arctic. There has been considerable recent interest in th…