Murdock Hart
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View article: The optical behaviour of BL Lacertae at its maximum brightness levels: a blend of geometry and energetics
The optical behaviour of BL Lacertae at its maximum brightness levels: a blend of geometry and energetics Open
In 2021 BL Lacertae underwent an extraordinary activity phase, which was intensively followed by the Whole Earth Blazar Telescope (WEBT) Collaboration. We present the WEBT optical data in the BVRI bands acquired at 36 observatories around …
View article: The Perkins INfrared Exosatellite Survey (PINES). II. Transit Candidates and Implications for Planet Occurrence around L and T Dwarfs
The Perkins INfrared Exosatellite Survey (PINES). II. Transit Candidates and Implications for Planet Occurrence around L and T Dwarfs Open
We describe a new transit-detection algorithm designed to detect single-transit events in discontinuous Perkins INfrared Exosatellite Survey (PINES) observations of L and T dwarfs. We use this algorithm to search for transits in 131 PINES …
View article: The Perkins INfrared Exosatellite Survey (PINES) II. Transit Candidates and Implications for Planet Occurrence around L and T Dwarfs
The Perkins INfrared Exosatellite Survey (PINES) II. Transit Candidates and Implications for Planet Occurrence around L and T Dwarfs Open
We describe a new transit detection algorithm designed to detect single transit events in discontinuous Perkins INfrared Exosatellite Survey (PINES) observations of L and T dwarfs. We use this algorithm to search for transits in 131 PINES …
View article: The Perkins INfrared Exosatellite Survey (PINES) I. Survey Overview, Reduction Pipeline, and Early Results
The Perkins INfrared Exosatellite Survey (PINES) I. Survey Overview, Reduction Pipeline, and Early Results Open
We describe the Perkins INfrared Exosatellite Survey (PINES), a near-infrared photometric search for short-period transiting planets and moons around a sample of 393 spectroscopically confirmed L- and T-type dwarfs. PINES is performed with…
View article: The Perkins INfrared Exosatellite Survey (PINES) I. Survey Overview, Reduction Pipeline, and Early Results
The Perkins INfrared Exosatellite Survey (PINES) I. Survey Overview, Reduction Pipeline, and Early Results Open
We describe the Perkins INfrared Exosatellite Survey (PINES), a near-infrared photometric search for short-period transiting planets and moons around a sample of 393 spectroscopically confirmed L- and T-type dwarfs. PINES is performed with…
View article: Confirmation of a Dynamical Model for the TRAPPIST-1 Exoplanetary System
Confirmation of a Dynamical Model for the TRAPPIST-1 Exoplanetary System Open
We present a new transit of TRAPPIST-1 d from 2021 August 25. The measured mid-point of this transit agrees with the prediction from a recently published dynamical model for the TRAPPIST-1 system and differs significantly from a naive pred…
View article: The complex variability of blazars: time-scales and periodicity analysis in S4 0954+65
The complex variability of blazars: time-scales and periodicity analysis in S4 0954+65 Open
Among active galactic nuclei, blazars show extreme variability properties. We here investigate the case of the BL Lac object S4 0954+65 with data acquired in 2019–2020 by the Transiting Exoplanet Survey Satellite (TESS) and by the Whole Ea…
View article: A test of the planet–star unipolar inductor for magnetic white dwarfs
A test of the planet–star unipolar inductor for magnetic white dwarfs Open
Despite thousands of spectroscopic detections, only four isolated white dwarfs exhibit Balmer emission lines. The temperature inversion mechanism is a puzzle over 30 years old that has defied conventional explanations. One hypothesis is a …
View article: PINES: First Year Operations and Photometric Performance
PINES: First Year Operations and Photometric Performance Open
The Perkins INfrared Exosatellite Survey (PINES) is a search for transiting satellites (planets or moons) around a sample of almost 400 spectroscopically confirmed L- and T-type dwarfs. The survey is conducted with the 1.8-m Perkins telesc…
View article: Multiwavelength Variability of BL Lacertae Measured with High Time Resolution
Multiwavelength Variability of BL Lacertae Measured with High Time Resolution Open
In an effort to locate the sites of emission at different frequencies and physical processes causing variability in blazar jets, we have obtained high time-resolution observations of BL Lacertae over a wide wavelength range: with the Trans…
View article: Multi-Wavelength Variability of BL Lacertae Measured with High Time Resolution
Multi-Wavelength Variability of BL Lacertae Measured with High Time Resolution Open
In an effort to locate the sites of emission at different frequencies and physical processes causing variability in blazar jets, we have obtained high time-resolution observations of BL Lacertae over a wide wavelength range: with the \emph…
View article: A Comparison of Einstein A Coefficients for OH Rotational Temperature Measurements Using a Large Astronomical Data Set
A Comparison of Einstein A Coefficients for OH Rotational Temperature Measurements Using a Large Astronomical Data Set Open
The Einstein A coefficients are considered to be a significant source of uncertainty in the measurement of OH rotational temperatures. Using simultaneous ground and spaced-based observations of OH emission, five sets of Einstein A coeffici…
View article: Sky Residual Correction
Sky Residual Correction Open
The near-infrared is populated by numerous emission lines radiated from the Earth’s atmosphere, and these emission lines are often several orders of magnitude brighter in intensity than the typical astrophysical science target. The subtrac…
View article: Long-term Spectroscopic Observations of the Atmospheric Airglow by the Sloan Digital Sky Survey
Long-term Spectroscopic Observations of the Atmospheric Airglow by the Sloan Digital Sky Survey Open
Spectra of the atmospheric airglow, termed sky spectra, are collected to estimate the total amount of contamination present in science spectra, and are intended to be used in a sky subtraction process. The Sloan Digital Sky Survey (SDSS) a…
View article: Prime Focus Spectrograph (PFS) for the Subaru telescope: ongoing integration and future plans
Prime Focus Spectrograph (PFS) for the Subaru telescope: ongoing integration and future plans Open
PFS (Prime Focus Spectrograph), a next generation facility instrument on the 8.2-meter Subaru Telescope, is a very wide-field, massively multiplexed, optical and near-infrared spectrograph. Exploiting the Subaru prime focus, 2394 reconfigu…
View article: Prime Focus Spectrograph (PFS) for the Subaru telescope: overview, recent progress, and future perspectives
Prime Focus Spectrograph (PFS) for the Subaru telescope: overview, recent progress, and future perspectives Open
Volume Number: 9908 - Date Published: 1 December 2016 - Softcover: 292 papers (3496) pages - ISBN: 9781510601956
View article: SUBARU prime focus spectrograph: integration, testing and performance for the first spectrograph
SUBARU prime focus spectrograph: integration, testing and performance for the first spectrograph Open
The Prime Focus Spectrograph (PFS) of the Subaru Measurement of Images and Redshifts (SuMIRe) project for Subaru telescope consists in four identical spectrographs fed by 600 fibers each. Each spectrograph is composed by an optical entranc…
View article: Visible camera cryostat design and performance for the SuMIRe Prime Focus Spectrograph (PFS)
Visible camera cryostat design and performance for the SuMIRe Prime Focus Spectrograph (PFS) Open
We describe the design and performance of the SuMIRe Prime Focus Spectrograph\n(PFS) visible camera cryostats. SuMIRe PFS is a massively multi-plexed\nground-based spectrograph consisting of four identical spectrograph modules,\neach recei…
View article: A novel reflectometer for relative reflectance measurements of CCDs
A novel reflectometer for relative reflectance measurements of CCDs Open
The high quantum efficiencies (QE) of backside illuminated charge coupled\ndevices (CCD) has ushered in the age of the large scale astronomical survey.\nThe QE of these devices can be greater than 90 %, and is dependent upon the\noperating…