Brian Sands
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View article: Jitter Sensing and Control for Multi-Plane Phase Retrieval
Jitter Sensing and Control for Multi-Plane Phase Retrieval Open
The family of multi-plane phase retrieval sensors, such as the curvature and nonlinear curvature wavefront sensors (WFS), contain tip/tilt information embedded in their signals. We have built a nonlinear curvature WFS to study different wa…
View article: Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS
Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS Open
We report the results from a pilot study to search for black holes and other dark companions in binary systems using direct imaging with SHARK-VIS and the iLocater pathfinder “Lili” on the Large Binocular Telescope. Starting from known sin…
View article: Resolving the Young 2 Cygni Runaway Star into a Binary Using iLocater
Resolving the Young 2 Cygni Runaway Star into a Binary Using iLocater Open
Precision radial velocity spectrographs that use adaptive optics (AO) show promise to advance telescope observing capabilities beyond those of seeing-limited designs. We are building a spectrograph for the Large Binocular Telescope (LBT) n…
View article: Little iLocater: paving the way for iLocater
Little iLocater: paving the way for iLocater Open
Diffraction-limited radial-velocity instruments offer a pathway towards improved precision and stability, and the exploration of new parameter spaces at high spatial and spectral resolution. However, achieving the necessary performance req…
View article: Resolving the Young 2 Cygni Run-away Star into a Binary using iLocater
Resolving the Young 2 Cygni Run-away Star into a Binary using iLocater Open
Precision radial velocity (RV) spectrographs that use adaptive optics (AO) show promise to advance telescope observing capabilities beyond those of seeing-limited designs. We are building a spectrograph for the Large Binocular Telescope (L…
View article: Little iLocater: paving the way for iLocater
Little iLocater: paving the way for iLocater Open
Diffraction-limited radial velocity instruments offer a pathway towards improved precision and stability, and the exploration of new parameter spaces at high spatial and spectral resolution. However, achieving the necessary performance req…
View article: Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS
Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS Open
We report the results from a pilot study to search for black holes and other dark companions in binary systems using direct imaging with SHARK-VIS and the iLocater pathfinder "Lili" on the Large Binocular Telescope. Starting from known sin…
View article: The iLocater cryostat and thermal control system: enabling extremely precise radial velocity measurements for diffraction-limited spectrographs
The iLocater cryostat and thermal control system: enabling extremely precise radial velocity measurements for diffraction-limited spectrographs Open
Extremely precise radial velocity (EPRV) measurements are critical for characterizing nearby terrestrial worlds. EPRV instrument precisions of $σ_{\mathrm{RV}} = 1-10\,\mathrm{cm/s}$ are required to study Earth-analog systems, imposing str…
View article: COVID 19 and the Opioid Epidemic: An Analysis of Clinical Outcomes During COVID 19
COVID 19 and the Opioid Epidemic: An Analysis of Clinical Outcomes During COVID 19 Open
Background and Objectives: Here we aimed to characterize clinical outcomes in those receiving treatment at a Veterans Health Administration (VHA) methadone maintenance treatment program (MMT) during the COVID 19 pandemic in which SAMSHA re…
View article: On-sky results for the integrated microlens ring tip-tilt sensor
On-sky results for the integrated microlens ring tip-tilt sensor Open
We present the first on-sky results of the microlens ring tip-tilt sensor. This sensor uses a 3D printed microlens ring feeding six multimode fibers to sense misaligned light, allowing centroid reconstruction. A tip-tilt mirror allows the …
View article: Final design and on-sky testing of the iLocater SX acquisition camera: broad-band single-mode fibre coupling
Final design and on-sky testing of the iLocater SX acquisition camera: broad-band single-mode fibre coupling Open
Enabling efficient injection of light into single-mode fibres (SMFs) is a key requirement in realizing diffraction-limited astronomical spectroscopy on ground-based telescopes. SMF-fed spectrographs, facilitated by the use of adaptive opti…