29 citations · 79 across the 27 of their papers we have counts for
12 papers · 1 filter
A Characterization of JWST MIRI Detector Persistence and Implications for High-Contrast Imaging
Alisha Vasan, Mary Anne Limbach, Andrew Vanderburg +2
The JWST MIRI detector exhibits a flux deficit persistence, but its timescales and impacts remain largely uncharacterized, particularly at the longest imaging wavelengths. In this…
An on-sky investigation into factors limiting the performance of Keck-NIRC2 for conducting infrared high-contrast imaging
Rachel Bowens-Rubin, Maïssa Salama, Jayke S. Nguyen +2
The most common instrument used by the exoplanet/brown dwarf direct imaging community at the W.M. Keck Observatory is currently the NIRC2 near-infrared imager. We performed on-sky…
Real-time control and data standardization on various telescopes and benches
Nour Skaf, Rebecca Jensen-Clem, Aaron Hunter +19
Real-time control (RTC) is pivotal for any Adaptive Optics (AO) system, including high-contrast imaging of exoplanets and circumstellar environments. It is the brain of the AO syst…
Investing in the Unrivaled Potential of Wide-Separation Sub-Jupiter Exoplanet Detection and Characterisation with JWST -- Strategic Exoplanet Initiatives with HST and JWST White Paper
Aarynn L. Carter, Rachel Bowens-Rubin, Per Calissendorff +15
We advocate for a large scale imaging survey of nearby young moving groups and star-forming regions to directly detect exoplanets over an unexplored range of masses, ages and orbit…
Towards understanding interactions between the AO system and segment co-phasing with the vector-Zernike wavefront sensor on Keck
Maïssa Salama, Charlotte Guthery, Vincent Chambouleyron +14
We extend our previous demonstration of the first on-sky primary mirror segment closed-loop control on Keck using a vector-Zernike wavefront sensor (vZWFS), which improved the Stre…
In-lab and On-sky Closed-loop Results of Adaptive Secondary Mirrors with TNO's Hybrid Variable Reluctance Actuators
Ruihan Zhang, Max Baeten, Mark R. Chun +8
We performed closed-loop lab testing of large-format deformable mirrors (DMs) with hybrid variable reluctance actuators. TNO has been developing the hybrid variable reluctance actu…
First laboratory and on-sky results of an adaptive secondary mirror with TNO-style actuators on the NASA Infrared Telescope Facility
Ellen Lee, Mark Chun, Olivier Lai +14
We are developing an adaptive secondary mirror (ASM) that uses a new actuator technology created by the Netherlands Organization for Applied Scientific Research (TNO). The TNO hybr…
An adaptive optics upgrade for the Automated Planet Finder Telescope using an adaptive secondary mirror
Rachel Bowens-Rubin, Arjo Bos, Philip Hinz +2
As we enter the era of TESS and JWST, instrumentation that can carry out radial velocity measurements of exoplanet systems is in high demand. We will address this demand by upgradi…
Performance of Large-Format Deformable Mirrors Constructed with Hybrid Variable Reluctance Actuators II: Initial Lab Results from FLASH
Rachel Bowens-Rubin, Daren Dillon, Philip M. Hinz +1
Advancements in high-efficiency hybrid variable reluctance (HVR) actuators are an enabling technology for building the next generation of large-format deformable mirrors, including…
Developing Adaptive Secondary Mirror Concepts for the APF and W.M. Keck Observatory Based on HVR Technology
Philip M. Hinz, Rachel Bowens-Rubin, Christoph Baranec +16
An Adaptive secondary mirror (ASM) allows for the integration of adaptive optics (AO) into the telescope itself. Adaptive secondary mirrors, based on hybrid variable reluctance (HV…
A Design Study on Adaptive Primaries for 1-2 Meter Class Telescopes
J. Fowler, Rachel Bowens-Rubin, Philip M. Hinz
Adaptive optics (AO) offers an opportunity to stabilize an image and maximize the spatial resolution achievable by ground based telescopes by removing the distortions due to the at…
Performance of Large-Format Deformable Mirrors Constructed with TNO Variable Reluctance Actuators
Rachel Bowens-Rubin, Philip Hinz, Wouter Jonker +3
Advancements in making high-efficiency actuators are an enabling technology for building the next generation of large-format deformable mirrors. The Netherlands Organization for Ap…