L. Denneau
A5087250036- Particle Detector Development and Performance
- Distributed and Parallel Computing Systems
- Astro and Planetary Science
- Gamma-ray bursts and supernovae
- Scientific Computing and Data Management
- Stellar, planetary, and galactic studies
- Isotope Analysis in Ecology
- Planetary Science and Exploration
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Solar and Space Plasma Dynamics
- Particle physics theoretical and experimental studies
- Astrophysics and Star Formation Studies
- Atmospheric Ozone and Climate
- Geophysics and Gravity Measurements
- Adaptive optics and wavefront sensing
- Space Satellite Systems and Control
- Space Exploration and Technology
- SAS software applications and methods
- Geological and Geochemical Analysis
- Particle Accelerators and Free-Electron Lasers
University of Hawaii System
2015-2024
University of Hawaiʻi at Mānoa
2006-2024
Monterey Institute for Research in Astronomy
2017-2023
Queen's University Belfast
2014
University of Hawaii–West Oahu
2010
Pan-STARRS is a highly cost-effective, modular and scalable approach to wide-field optical/NIR imaging. It uses 1.8m telescopes with very large (7 square degree) field of view revolutionary1.4 billion pixel CCD cameras low noise rapid read-out provide broad-band imaging from 400-1000nm wavelength. The first single telescope system, PS1, has been deployed on Haleakala Maui, collecting science quality survey data for approximately six months. PS1 will be joined by second PS2 in 18 A four...
With the NEOWISE portion of Wide-field Infrared Survey Explorer (WISE) project, we have carried out a highly uniform survey near-Earth object (NEO) population at thermal infrared wavelengths ranging from 3 to 22 μm, allowing us refine estimates their numbers, sizes, and albedos. The detected NEOs same way whether they were previously known or not, subject availability ground-based follow-up observations, resulting in discovery more than 130 new NEOs. survey's sensitivity, observing cadence,...
This paper describes the organization of database and catalog data products from Pan-STARRS1 $3\pi$ Steradian Survey. The are available in form an SQL-based relational MAST, Mikulski Archive for Space Telescopes at STScI. is described detail, including construction database, provenance data, schema, how tables related. Examples queries a range science goals included.
We present the details of photometric and astrometric calibration Pan-STARRS1 $3\pi$ Survey. The goals were to reduce systematic effects introduced by camera detectors, place all observations onto a system with consistent zero points over entire area surveyed, ~30,000 square degrees north $\delta$ = -30 degrees. compensates for similar so that positions, proper motions, parallaxes are reliable as well. Pan-STARRS Data Release 2 (DR2) astrometry is tied Gaia DR1 release.
Technology has advanced to the point that it is possible image entire sky every night and process data in real time. The hardly static: many interesting phenomena occur, including variable stationary objects such as stars or QSOs, transient supernovae M dwarf flares, moving asteroids themselves. Funded by NASA, we have designed built a survey system for purpose of finding dangerous near-Earth (NEAs). This system, "Asteroid Terrestrial-impact Last Alert System" (ATLAS), been optimized produce...
The Asteroid Terrestrial impact Last Alert System (ATLAS) system consists of two 0.5m Schmidt telescopes with cameras covering 29 square degrees at plate scale 1.86 arcsec per pixel. Working in tandem, the routinely survey whole sky visible from Hawaii (above $\delta > -50^{\circ}$) every nights, exposing four times night, typically reaching $o < 19$ magnitude exposure when moon is illuminated and $c 19.5$ dark skies. Construction underway further units to be sited Chile South Africa which...
We present griz light curves of 146 spectroscopically confirmed Type Ia Supernovae ($0.03 < z <0.65$) discovered during the first 1.5 years Pan-STARRS1 Medium Deep Survey. The natural photometric system is determined by a combination on-site measurements instrument response function and observations spectrophotometric standard stars. find that systematic uncertainties in are currently 1.2\% without accounting for uncertainty HST Calspec definition AB system. A Hubble diagram constructed with...
We present the ATLAS discovery and initial analysis of first 18 days unusual transient event, ATLAS18qqn/AT2018cow. It is characterized by a high peak luminosity ($\sim$1.7 $\times$ 10$^{44}$ erg s$^{-1}$), rapidly evolving light curves ($>$5 mag rise to in $\sim$3.5 days), hot blackbody spectra, peaking at $\sim$27000 K that are relatively featureless unchanging over two weeks. The bolometric curve cannot be powered radioactive decay under realistic assumptions. detection high-energy...
We describe the Pan-STARRS Moving Object Processing System (MOPS), a modern software package that produces automatic asteroid discoveries and identifications from catalogs of transient detections next-generation astronomical survey telescopes. MOPS achieves > 99.5% efficiency in producing orbits synthetic but realistic population asteroids whose measurements were simulated for Pan-STARRS4-class telescope. Additionally, using non-physical grid population, we demonstrate can detect populations...
The Pan-STARRS Data Processing System is responsible for the steps needed to downloaded, archive, and process all images obtained by telescopes, including real-time detection of transient sources such as supernovae moving objects potentially hazardous asteroids. With a nightly data volume up 4 terabytes an archive over petabytes raw imagery, solidly in realm Big astronomy. full processing system consists several subsystems covering wide range necessary capabilities. This article describes...
We probe the systematic uncertainties from 113 Type Ia supernovae (SNIa) in Pan-STARRS1 (PS1) sample along with 197 SN a combination of low-redshift surveys. The companion paper by Rest et al. (2013) describes photometric measurements and cosmological inferences PS1 sample. largest uncertainty stems calibration low-z samples. increase observed Calspec standards 7 to 10 used define system. SDSS-II systems are compared discrepancies up ~0.02 mag recovered. find proper way treat intrinsic...
We present observations and analysis of 18 stripped-envelope supernovae observed during 2013–2018. This sample consists five H/He-rich SNe, six H-poor/He-rich three narrow lined SNe Ic, four broad Ic. The peak luminosity characteristic time-scales the bolometric light curves are calculated, modelled to derive 56Ni ejecta masses (MNi Mej). Additionally, temperature evolution spectral line velocity each SN examined. Analysis [O i] in nebular phase eight suggests their progenitors had initial...
Abstract Over 3 billion astronomical sources have been detected in the more than 22 million orthogonal transfer CCD images obtained as part of Pan-STARRS1 π survey. 85 instances those automatically and characterized by Pan-STARRS Image Processing Pipeline photometry software, psphot . This fast, automatic, reliable software was developed for project but is easily adaptable to from other telescopes. We describe analysis general well specific case third processing version used first two public...
We present a recalibration of the Sloan Digital Sky Survey (SDSS) photometry with new flat fields and zero points derived from Pan-STARRS1 (PS1). Using PSF 60 million stars $16 < r 20$, we derive model amplifier gain flat-field corrections per-run RMS residuals 3 millimagnitudes (mmag) in $griz$ bands 15 mmag $u$ band. The photometric are adjusted to leave median Galactic North unchanged for compatibility previous SDSS work. also identify transient non-photometric periods ("contrails") based...
We present the discovery that ASASSN-14ko is a periodically flaring AGN at center of galaxy ESO 253-G003. At time its by All-Sky Automated Survey for Supernovae (ASAS-SN), it was classified as supernova close to nucleus. The subsequent six years V- and g-band ASAS-SN observations reveal has nuclear flares occurring regular intervals. seventeen observed outbursts show evidence decreasing period over time, with mean $P_0 = 114.2 \pm 0.4$ days derivative $\dot{P} -0.0017\pm0.0003$. most recent...
We present the discovery of ASASSN-18ey (MAXI J1820+070), a new black hole low-mass X-ray binary discovered by All-Sky Automated Survey for SuperNovae (ASAS-SN). A week after ASAS-SN as an optical transient, it was detected transient MAXI/GCS. Here, we analyze and Asteroid Terrestrial-impact Last Alert System (ATLAS) pre-outburst light curves, finding evidence intrinsic variability several years prior to outburst. While there no long-term rise leading outburst, has been seen in other...
The Asteroid Terrestrial-impact Last Alert System (ATLAS) carries out its primary planetary defense mission by surveying about 13000 deg^2 at least four times per night. resulting data set is useful for the discovery of variable stars to a magnitude limit fainter than r~18, with amplitudes down 0.01 mag bright objects. Here we present Data Release One catalog based on analyzing 142 million measured 100 in first two years ATLAS operations. Using Lomb-Scargle periodogram and other variability...
ABSTRACT GW190425 is the second of two binary neutron star (BNS) merger events to be significantly detected by Laser Interferometer Gravitational Wave (GW) Observatory (LIGO), Virgo and Kamioka (KAGRA) detector network. With a detection only in LIGO Livingston, skymap containing source was large no plausible electromagnetic counterpart found real-time searching 2019. Here, we summarize Asteroid Terrestrial-Impact Last Alert System (ATLAS) Panoramic Survey Telescope Rapid Response...
Abstract In an effort to search for faint sources of emission over arbitrary timescales, we present a novel method analyzing forced photometry light curves in difference imaging from optical surveys. Our “ATLAS Clean,” or ATClean, utilizes the reported fluxes, uncertainties, and fits point-spread function (PSF) images quantify statistical significance individual measurements. We apply this control across image determine whether any source flux is data range specific timescales. From ATLAS o...
We present a new satellite in the outer halo of Galaxy, first Milky Way found stacked photometric catalog Panoramic Survey Telescope and Rapid Response System 1 (Pan-STARRS1) Survey. From follow-up photometry obtained with WFI on MPG/ESO 2.2m telescope, we argue that object, located at heliocentric distance 145+/-17 kpc, is most distant globular cluster yet known. With total magnitude M_V=-4.3+/-0.2 half-light radius 20+/-2 pc, it shares properties extended clusters our Galaxy Andromeda...
Using a large sample of field and group galaxies drawn from the Pan-STARRS1 Medium-Deep Survey, we present specific star formation rate (SSFR) - stellar mass (M*) relation, as well quiescent fraction versus M* relation in different environments. We confirm that is strongly dependent on environment at fixed mass, but amplitude slope star-forming sequence similar between groups: other words, SSFR-density primarily driven by change fractions environments rather than global suppression for...