T. Jenness
A5059513243- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Adaptive optics and wavefront sensing
- Galaxies: Formation, Evolution, Phenomena
- Distributed and Parallel Computing Systems
- Scientific Computing and Data Management
- Superconducting and THz Device Technology
- Gamma-ray bursts and supernovae
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Astrophysical Phenomena and Observations
- Molecular Spectroscopy and Structure
- Radio Astronomy Observations and Technology
- Advanced Data Storage Technologies
- Atmospheric Ozone and Climate
- Environmental Monitoring and Data Management
- Advanced Computational Techniques and Applications
- Geophysics and Gravity Measurements
- Scientific Research and Discoveries
- Medical Imaging Techniques and Applications
- Spectroscopy and Laser Applications
Vera C. Rubin Observatory
2022-2023
Kitt Peak National Observatory
2023
University of Arizona
2022
Large Synoptic Survey Telescope Corporation
2015-2019
University of Hawaii at Hilo
2008-2018
Cornell University
1959-2018
University of British Columbia
2016
Joint Institute for Nuclear Astrophysics
1998-2014
Joint Research Centre
2003-2010
Urbana University
1959
We present the first public version (v0.2) of open-source and community-developed Python package, Astropy. This package provides core astronomy-related functionality to community, including support for domain-specific file formats such as Flexible Image Transport System (FITS) files, Virtual Observatory (VO) tables, common ASCII table formats, unit physical quantity conversions, constants specific astronomy, celestial coordinate time transformations, world system (WCS) support, generalized...
Abstract The Astropy Project supports and fosters the development of open-source openly developed Python packages that provide commonly needed functionality to astronomical community. A key element is core package astropy , which serves as foundation for more specialized projects packages. In this article, we summarize features in recent major release, version 5.0, updates on Project. We then discuss supporting a broader ecosystem interoperable packages, including connections with several...
Abstract The Astropy Project supports and fosters the development of open-source openly developed Python packages that provide commonly needed functionality to astronomical community. A key element is core package astropy , which serves as foundation for more specialized projects packages. In this article, we an overview organization project summarize features in package, recent major release, version 2.0. We then describe infrastructure designed facilitate support a broader ecosystem...
The advent of sensitive sub-mm array cameras now allows a proper census dust-enshrouded massive star-formation in very distant galaxies, previously hidden activity to which even the faintest optical images are insensitive. We present deepest survey sky date, taken with SCUBA camera on James Clerk Maxwell Telescope and centred Hubble Deep Field. high source density found this image implies that is confusion-limited below flux 2 mJy. However, within central 80 arcsec radius independent...
SCUBA, the Submillimetre Common-User Bolometer Array, built by Royal Observatory Edinburgh for James Clerk Maxwell Telescope, is most versatile and powerful of a new generation submillimetre cameras.It combines sensitive dual-waveband imaging array with three-band photometer, sky-background limited emission from Mauna Kea atmosphere at all observing wavelengths 350 µm to 2 mm.The increased sensitivity size mean that SCUBA maps close 10,000 times faster than its single-pixel predecessor...
SCUBA-2 is an innovative 10000 pixel bolometer camera operating at submillimetre wavelengths on the James Clerk Maxwell Telescope (JCMT). The has capability to carry out wide-field surveys unprecedented depths, addressing key questions relating origins of galaxies, stars and planets. With two imaging arrays working simultaneously in atmospheric windows 450 850 microns, vast increase count means that maps sky 100-150 times faster than previous SCUBA instrument. In this paper we present...
We present the maps, source catalogue and number counts of largest, most complete unbiased extragalactic submillimetre survey ever undertaken: 850-micron SCUBA HAlf Degree Extragalactic Survey (SHADES). Using Submillimetre Common-User Bolometer Array (SCUBA) on James Clerk Maxwell Telescope (JCMT), SHADES mapped two separate regions sky: Subaru/XMM-Newton Deep Field (SXDF) Lockman Hole East (LH). These maps cover 720 square arcmin with an RMS noise level about 2 mJy have uncovered >100...
We present a catalogue of nearly 3,000 submillimetre sources detected at 850um over ~5 square degrees surveyed as part the James Clerk Maxwell Telescope (JCMT) SCUBA-2 Cosmology Legacy Survey (S2CLS). This is largest survey its kind 850um, probing meaningful cosmic volume peak star formation activity and increasing sample size galaxies selected by an order magnitude. describe wide component S2CLS, which covers key extragalactic fields: UKIDSS-UDS, COSMOS, Akari-NEP, Extended Groth Strip,...
The Submillimetre Common User Bolometer Array 2 (SCUBA-2) is an instrument operating on the 15-m James Clerk Maxwell Telescope, nominally consisting of 5120 bolometers in each two simultaneous imaging bands centred over 450 and 850 um. camera operated by scanning across sky recording data at a rate 200 Hz. As largest new generation multiplexed kilopixel bolometer cameras (sub)millimetre, SCUBA-2 analysis represents significant challenge. We describe production maps using Sub-Millimetre...
SCUBA-2 is a 10 000-bolometer submillimetre camera on the James Clerk Maxwell Telescope. The instrument commissioning was completed in 2011 September, and full science operations began October. To harness potential of this powerful new astronomical tool, calibration must be accurate well understood. end, algorithms for calculating line-of-sight opacity have been improved, derived atmospheric extinction relationships at both wavebands are presented. results from over 500 primary secondary...
Dust emission around the nearby star Eridani has been imaged using a new submillimeter camera (the Submillimetre Common-User Bolometer Array at James Clerk Maxwell Telescope). At an 850 μm wavelength, ring of dust is seen peaking 60 AU from and with much lower inside 30 AU. The mass least ~0.01 M⊕ in dust, while upper limit 0.4 molecular gas imposed by CO observations. total comparable to estimated amount material, 0.04-0.3 M⊕, comets orbiting solar system. most probable origin structure...
Determining an accurate position for a submillimetre (submm) galaxy (SMG) is the crucial step that enables us to move from basic properties of SMG sample – source counts and 2D clustering assessment their detailed, multiwavelength properties, contribution history cosmic star formation links with present-day populations. In this paper, we identify robust radio and/or infrared (IR) counterparts, hence positions, over two-thirds SCUBA HAlf-Degree Extragalactic Survey (SHADES) Source Catalogue,...
This paper describes a new Heterodyne Array Receiver Program (HARP) and Auto-Correlation Spectral Imaging System (ACSIS) that have recently been installed commissioned on the James Clerk Maxwell Telescope. The 16-element focal-plane array receiver, operating in submillimetre from 325 to 375 GHz, offers high (three-dimensional) mapping speeds, along with significant improvements over single-detector counterparts calibration image quality. temperatures are ∼120 K across whole band, system of...
In this paper, we present the first observations of Ophiuchus molecular cloud performed as part James Clerk Maxwell Telescope (JCMT) Gould Belt Survey (GBS) with SCUBA-2 instrument.We demonstrate methods for combining these data previous HARP CO, Herschel, and IRAM N 2 H + in order to accurately quantify properties sources Ophiuchus.We produce a catalogue all found by SCUBA-2.We separate into protostars starless cores.We list cores perform full virial analysis, including external...
The Large Synoptic Survey Telescope (LSST) is a large-aperture, wide-field, ground-based survey system that will image the sky in six optical bands from 320 to 1050 nm, uniformly covering approximately $18,000$deg$^2$ of over 800 times. LSST currently under construction on Cerro Pachón Chile, and expected enter operations 2022. Once operational, explore wide range astrophysical questions, discovering "killer" asteroids examining nature Dark Energy. generate average 15 TB data per night,...
Debris discs are evidence of the ongoing destructive collisions between planetesimals, and their presence around stars also suggests that planets exist in these systems. In this paper, we present submillimetre images thermal emission from debris formed SCUBA-2 Observations Nearby Stars (SONS) survey, one seven legacy surveys undertaken on James Clerk Maxwell Telescope 2012 2015. The overall results survey presented form 850 μm (and 450 μm, where possible) fluxes for observed fields. Excess...
The first deep blank-field 450um map (1-sigma~1.3mJy) from the SCUBA-2 Cosmology Legacy Survey (S2CLS), conducted with James Clerk Maxwell Telescope (JCMT) is presented. Our covers 140 arcmin^2 of COSMOS field, in footprint HST CANDELS area. Using 60 submillimetre galaxies (SMGs) detected at >3.75-sigma, we evaluate number counts 450um-selected flux densities S_450>5mJy. 8-arcsec JCMT beam and high sensitivity now make it possible to directly resolve a larger fraction cosmic infrared...
We present the $^{13}$CO/C$^{18}$O (J=3-2) Heterodyne Inner Milky Way Plane Survey (CHIMPS) which has been carried out using Array Receiver Program on 15 m James Clerk Maxwell Telescope (JCMT) in Hawaii. The high-resolution spectral survey currently covers |b| < 0.5 deg and 28 l 46 deg, with an angular resolution of arcsec km/s velocity channels. spectra have a median rms $\sim$ 0.6 K at this resolution, for optically thin gas excitation temperature 10 K, sensitivity corresponds to column...
The unprecedented volume and rate of transient events that will be discovered by the Large Synoptic Survey Telescope (LSST) demands astronomical community update its followup paradigm. Alert-brokers -- automated software system to sift through, characterize, annotate prioritize for critical tools managing alert streams in LSST era. Arizona-NOAO Temporal Analysis Response Events System (ANTARES) is one such broker. In this work, we develop a machine learning pipeline characterize classify...
We present first results from a submillimeter continuum survey of the Galactic center "central molecular zone" (CMZ), made with Submillimeter Common-User Bolometer Array (SCUBA) on James Clerk Maxwell Telescope. SCUBA's scan-map mode has allowed us to make extremely wide field maps thermal dust emission unprecedented speed and sensitivity. also discuss some issues related elimination artifacts in data. Our simultaneous 850/450 μm have total size approximately 28 × 05 (400 75 pc) elongated...
We report the detection of linear polarization from Sgr A* at 750, 850, 1350, and 2000 µm which confirms contribution synchrotron radiation. From lack longer wavelengths, it appears to arise in millimeter/submillimeter excess. There are large position angle changes between millimeter submillimeter results, these discussed terms a polarized dust various models. In model that best explains data, radiation excess is self-absorbed region becomes optically thin submillimeter. This implies arises...
New submillimeter images have been obtained of the dust disk around nearby K2 V star Eridani, with total data set now spanning 5 yr. These show distribution dusty debris generated by comet collisions, reflecting clearing and perturbations planets, may give insights to early conditions in solar system. The structure seen Eri at 850 μm published 1998 is confirmed new observations, same also an image for first time 450 μm. inclined ≈25° sky plane, emission peaking 65 AU, a 105 AU radius outer...
A follow-up survey using the Submillimetre High-Angular Resolution Camera (SHARC-II) at 350 microns has been carried out to map regions around several 850 micron-selected sources from HAlf Degree Extragalactic Survey (SHADES). These observations probe infrared luminosities and hence star-formation rates in largest existing, most robust sample of submillimetre galaxies (SMGs). We measure micron flux densities for 24 sources, seven which are detected >2.5-sigma within a 10 arcsec search...
We present Herschel observations from the Gould Belt Survey and SCUBA-2 science verification JCMT of B1 clump in Perseus molecular cloud. determined dust emissivity index using four different techniques to combine PACS+SPIRE data at 160–500 μm with 450 850 μm. Of our techniques, we found that most robust method was filtering out large-scale emission bands match spatial scales recovered by reduction pipeline. Using this method, find β ≈ 2 toward filament region moderately dense material lower...