A5101754875- Adaptive optics and wavefront sensing
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- Combustion and flame dynamics
- Advanced Combustion Engine Technologies
- Advanced optical system design
- History and Developments in Astronomy
- Optical Systems and Laser Technology
- Astrophysical Phenomena and Observations
- Satellite Image Processing and Photogrammetry
- Astrophysics and Cosmic Phenomena
- Advanced Measurement and Metrology Techniques
- Space Exploration and Technology
- Spectroscopy and Chemometric Analyses
- Opinion Dynamics and Social Influence
- Plant Taxonomy and Phylogenetics
- Asphalt Pavement Performance Evaluation
- Galaxies: Formation, Evolution, Phenomena
- bioluminescence and chemiluminescence research
- CCD and CMOS Imaging Sensors
- Photocathodes and Microchannel Plates
- Advanced MEMS and NEMS Technologies
University of Florida
2004-2018
Las Cumbres Observatory Global Telescope Network
2014-2018
University of Arizona
2012-2017
Oak Ridge National Laboratory
2014
Gemini South Observatory
2010-2012
Universidad Nacional Autónoma de México
2005
The Gemini multiconjugate adaptive optics system – GeMS, a facility instrument mounted on the South telescope, delivers uniform, near diffraction limited images at near-infrared wavelengths (0.95–2.5 μm) over field of view 120 arcsec. GeMS is first sodium layer based multilaser guide star used in astronomy. It uses five laser stars distributed 60 arcsec square constellation to measure for atmospheric distortions and two deformable mirrors compensate it. In this paper, second one devoted...
We present the results from commissioning of Gemini South Adaptive Optics Imager (GSAOI). Capable delivering diffraction limited images in near-infrared, over an 85′′ ×85′′ square field-of-view, GSAOI was designed for use with Multi-Conjugate (GeMS) system operation at Observatory. The instrument focal plane, covered by array four HAWAII-2RG detectors, contains 4080×4080 pixels and has a plate scale 0.02′′ – thus capitalizing on superb image quality delivered both all-refractive optical...
Observations of binary stars containing an accreting black hole or neutron star often show x-ray emission extending to high energies (>10 kilo--electron volts), which is ascribed accretion disk corona energetic particles akin those seen in the solar corona. Despite their ubiquity, physical conditions coronae remain poorly constrained. Using simultaneous infrared, optical, x-ray, and radio observations Galactic system V404 Cygni, showing a rapid synchrotron cooling event its 2015 outburst, we...
GeMS, the Gemini Laser Guide Star Multi-Conjugate Adaptive Optics facility system, has seen first light in December 2011, and already produced images with H band Strehl ratio excess of 35% over fields view 85x85 arcsec, fulfilling MCAO promise. In this paper, we report on these early results, analyze trends performance, concentrate key or novel aspects like centroid gain estimation, on-sky non common path aberration estimation. We also present astrometric analysis, showing very encouraging results.
We present near-IR, integral field spectroscopic observations of the planetary nebula (PN) Hb 12 using Near-infrared Integral Field Spectrograph (NIFS) on Gemini-North. Combining NIFS with adaptive optics system Altair, we provide a detailed study core and inner structure this PN. focus analysis in prominent emission lines [Fe ii] (1.6436 μm), He i (2.0585 H2 (2.1214 Brγ (2.16553 μm). find that traces tilted bipolar lobes, northern lobe being redshifted southern blueshifted. The is very...
The Gemini Multi-Conjugate Adaptive Optics System (GeMS) began its on-sky commissioning in January 2011. system provides high order wide field corrections using a constellation of five Laser Guide Stars. In December 2011, culminated images with FWHM 80±2mas at 1.65 microns (H band) over an 87 x arcsecond view. first have already demonstrated the scientific potential GeMS, and after more than year GeMS is finally close to completion ready for science. This paper presents general status...
We present an overview of the current status facility instruments at Large Binocular Telescope (LBT). These include Optical and Near-Infrared instruments: prime-focus optical Cameras (LBCs); Multi-Object Double Spectrograph (MODS); LBT Near-IR Spectroscopic Utility with Camera Instruments (LUCIs). Each side telescope contains one aforementioned instruments. detail recent move to "all binocular all time" science operations, including use multi-mode Adaptive Optics LUCIs (diffraction limited...
The Canarias InfraRed Camera Experiment (CIRCE) is a near-infrared (1–2.5[Formula: see text][Formula: text]m) imager, polarimeter and low-resolution spectrograph operating as visitor instrument for the Gran Telescopio (GTC) 10.4-m telescope. It was designed built largely by graduate students postdocs, with help from University of Florida (UF) astronomy engineering group, funded UF US National Science Foundation. CIRCE intended to fill gap in capabilities prior arrival Especrografo...
The Gemini Multi-Conjugate Adaptive Optics System (GeMS} began its on-sky commissioning in January 20ll. system provides high order wide-field corrections using a constellation of five Laser Guide Stars. In December 20ll, culminated images with FWHM 80±2mas at 1.65 microns (H band} over an 87 x arcsccond field view. first have already demonstrated the scientific potential GeMS, and after more than year GeMS is finally close to completion ready for science. This paper presents general status...
CIRCE is a near-infrared (1-2.5 micron) imager, polarimeter and low-resolution spectrograph intended as visitor instrument for the Gran Telescopio Canarias 10.-4m telescope. It was built largely by graduate students postdocs, with help from UF astronomy engineering group, funded University of Florida U.S. National Science Foundation. to fill gap in time between GTC first light arrival EMIR, will also provide following scientific capabilities compliment EMIR after its arrival: high-...
We report on the design status of Canarias InfraRed Camera Experiment (CIRCE), a near-infrared visitor instrument for 10.4 meter Gran Telescopio (GTC). In addition to functioning as 1-2.5 micron imager, CIRCE will have capacity narrow-band imaging, low-and moderate- resolution grism spectroscopy, and imaging polarimetry. CIRCE's all-reflective aspheric optical offers excellent throughput image quality. present an analysis layout progress opto-mechanical manufacture.
Analysing narratives through their social networks is an expanding field in quantitative literary studies. Manually extracting a network from any narrative can be time consuming, so automatic extraction methods of varying complexity have been developed. However, the effect different on analysis unknown. Here we model and compare three for narratives: manual extraction, co-occurrence automated using machine learning. Although method produces more precise results analysis, it much consuming...
The Large Binocular Telescope Observatory (LBTO), a joint scientific venture between the Instituto Nazionale di Astrofisica (INAF), LBT Beteiligungsgesellschaft (LBTB), University of Arizona, Ohio State (OSU), and Research Corporation, is one newest additions to world's collection large optical/infrared ground-based telescopes. With its unique, twin 8.4m mirror design providing 22.8 meter interferometric baseline collecting area an 11.8m telescope, has window opportunity exploit singular...
Abstract We survey the environment of Cl 1806-20 using near-infrared narrow-band imaging to search for Brγ features indicative evolved massive stars. Using this technique, we successfully detect previously identified stars in cluster. no new emission line stars, establishing a firm upper limit on number Wolf Rayets and Luminous Blue Variables; however, do find several candidate OB supergiants, which likely represent bulk heretofore undiscovered star population.
CIRCE is a near-infrared (1-2.5 micron) imager (including low-resolution spectroscopy and polarimetery) in operation as visitor instrument on the Gran Telescopio Canarias 10.-4m tele scope. It was built largely by graduate students postdocs, with help from UF Astronomy engineering group, funded University of Florida U.S. National Science Foundation. helping to fill gap time between GTC first light arrival EMIR, will also provide following scientific capabilities compliment EMIR after its...
We report on the design status of Canarias InfraRed Camera Experiment (CIRCE), a near-infrared visitor instrument for 10.4-meter Gran Telescopio (GTC). Besides functioning as 1-2.5 micron imager, CIRCE will have capacity narrow-band imaging, low- and moderate- resolution grism spectroscopy, imaging polarimetry. Other features include fully cryogenic filter, slit, wheels, high-speed photometry modes, broad-band in J, H, Ks filters. anticipate that myriad scientific projects benefit from...
The Canarias InfraRed Camera Experiment (CIRCE) is a near-infrared (1-2.5 micron) imager, polarimeter and low-resolution spectrograph operating as visitor instrument for the Gran Telescopio 10.4-meter telescope. It was designed built largely by graduate students postdocs, with help from UF astronomy engineering group, funded University of Florida U.S. National Science Foundation. CIRCE intended to fill gap in capabilities prior arrival EMIR GTC, will also provide following scientific...
We present the design for a high-speed readout imaging mode Canarias InfraRed Camera Experiment (CIRCE), visitor-class near-IR imager, spectrograph, and polarimeter 10.4 meter Gran Telescopio (GTC). This mode, along with polarimetric spectroscopic capabilities of instrument will provide powerful unique study fast variability objects. Modification in firmware control electronics HAWAII-2 2048×2048 detector allow us to select effective size hence reduce time. description final discussion...