A5080085455- Linguistics and language evolution
- Classical Antiquity Studies
- Astronomy and Astrophysical Research
- Particle Detector Development and Performance
- Ancient Near East History
- Radiation Detection and Scintillator Technologies
- Stellar, planetary, and galactic studies
- Lexicography and Language Studies
- Byzantine Studies and History
- Gamma-ray bursts and supernovae
- CCD and CMOS Imaging Sensors
- Ancient Mediterranean Archaeology and History
- Law, logistics, and international trade
- Classical Philosophy and Thought
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Radiation Effects in Electronics
- Historical and Literary Analyses
- Particle physics theoretical and experimental studies
- Maritime and Coastal Archaeology
- German Literature and Culture Studies
- Advanced Measurement and Metrology Techniques
- Galaxies: Formation, Evolution, Phenomena
- Historical and Linguistic Studies
- Ancient Egypt and Archaeology
University of California, Santa Cruz
2019-2021
Smithsonian Astrophysical Observatory
2005-2020
University of Chinese Academy of Sciences
2020
Institute of High Energy Physics
2020
Chinese Academy of Sciences
2020
Harvard University Press
2011-2015
Center for Astrophysics Harvard & Smithsonian
1982-2015
Harvard University
1998
John Brown University
1977-1994
The Hectospec is a 300 optical fiber fed spectrograph commissioned at the MMT in spring of 2004. In configuration pioneered by Autofib instrument Anglo‐Australian Telescope, Hectospec's probes are arranged radial "fisherman on pond" geometry and held position with small magnets. A pair high‐speed, six‐axis robots move buttons between observing configurations within ∼300 s, to an accuracy ∼25 μm. fibers run for 26 m MMT's focal surface bench spectrograph, operating R∼1000–2000. Hectochelle,...
View a video of Professor Greg Nagy leading discussion and commentary on one the greatest epics all time: The Iliad
The Hectochelle is an optical band, fiber-fed, multiobject echelle spectrograph deployed at the MMT Observatory on Mount Hopkins, Arizona. fibers that feed are positioned by Hectospec robot positioner f/5 focal surface, and shares fiber system with Hectospec, a moderate-dispersion collocated Hectochelle. can record up to 240 spectra simultaneously resolution of 38,000. Spectra cover single diffractive order approximately 150 Å wide. total potential operating passband extends from 3800 9000...
CfAIR2 is a large, homogeneously reduced set of near-infrared (NIR) light curves (LCs) for Type Ia supernovae (SNe Ia) obtained with the 1.3 m Peters Automated InfraRed Imaging TELescope. This data includes 4637 measurements 94 SNe and 4 additional Iax observed from 2005 to 2011 at Fred Lawrence Whipple Observatory on Mount Hopkins, Arizona. photometric 88 normal 6 spectroscopically peculiar SN in nearby universe, median redshift z ∼ 0.021 Ia. span range −13 days +127 B-band maximum. More...
As part of an ongoing program measuring galaxy redshifts at Mount Hopkins observatory, several previously unknown bright Seyfert galaxies have been discovered. Most the objects are type 2, but 1 where broad permitted line region is easily visible only for H-alpha line. The existence such active galactic nuclei that overlooked in previous color or prism searches can a large effect on calculated number density AGN.
F. G. Tryhorn and W. Wyatt, Trans. Faraday Soc., 1927, 23, 238 DOI: 10.1039/TF9272300238
Surface brightness is a fundamental observational parameter of galaxies. We show, for the first time in detail, how it can be used to obtain photometric redshifts galaxies, μ-PhotoZ method. demonstrate that Tolman surface relation, μ ∝ (1 + z)-4, powerful tool determining galaxy from data. develop model using and color percentile (ranking) measure apply our method set galaxies SHELS survey, redshift accuracy achieved alone comparable with best color-based methods. show very effective red...
Ultra-Fast Silicon Detectors (UFSDs) are n-in-p silicon detectors that implement moderate gain (typically 5 to 25) using a thin highly doped p++ layer between the high resistivity p-bulk and junction of sensor. The presence allows excellent time measurement for impinging minimum ionizing charged particles. An important design consideration is sensor thickness, which has strong impact on achievable resolution. We present result measurements LGADs thickness 20 micro-m 50 micro-m. data fit...
A crucial feature of large telescopes using multiple objectives is the ability to align optics so that different star images coincide within a fraction image size. Initially this was intended be done in MMT with "laser active optics" system which six were coaligned by means artificial laser-star generated seventh guide-alignment telescope. That found less than satisfactory mostly because internal seeing and scattered light effects. Instead we have constructed Telescope Coalignment System (or...
We announce the public release of 141,531 moderate-dispersion optical spectra 72,247 objects acquired over past 25 years with FAST Spectrograph on Fred L. Whipple Observatory 1.5-meter Tillinghast telescope. describe data acquisition and processing so that scientists can understand spectra. highlight some largest survey programs, make recommendations for use. The have been placed in a Virtual accessible archive are ready download.