Publications (32)
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) Spectrographs
J. C. Wilson, F. R. Hearty, M. F. Skrutskie +86
We describe the design and performance of the near-infrared (1.51--1.70 micron), fiber-fed, multi-object (300 fibers), high resolution (R = lambda/delta lambda ~ 22,500) spectrogra…
Simultaneous memory effects in the stress and in the dielectric susceptibility of a stretched polymer glass
J. Hem, C. Crauste-Thibierge, Clement Florence +2
We report experimental evidence that a polymer stretched at constant strain rate presents complex memory effects after that is set to zero at a specific strain $Î…
Discovery and spectroscopy of the young Jovian planet 51 Eri b with the Gemini Planet Imager
B. Macintosh, J. R. Graham, T. Barman +85
Directly detecting thermal emission from young extrasolar planets allows measurement of their atmospheric composition and luminosity, which is influenced by their formation mechani…
An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data
N. Padmanabhan, D. J. Schlegel, D. P. Finkbeiner +21
We present an algorithm to photometrically calibrate wide field optical imaging surveys, that simultaneously solves for the calibration parameters and relative stellar fluxes using…
A Curious New Milky Way Satellite in Ursa Major
D. B. Zucker, V. Belokurov, N. W. Evans +29
In this Letter, we study a localized stellar overdensity in the constellation of Ursa Major, first identified in Sloan Digital Sky Survey (SDSS) data and subsequently followed up w…
The 3rd International Planning Competition: Results and Analysis
M. Fox, D. Long
This paper reports the outcome of the third in the series of biennial international planning competitions, held in association with the International Conference on AI Planning and…
Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions
V. Belokurov, D. B. Zucker, N. W. Evans +31
We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed-up with either the Subaru or the Isaac Newto…
A Faint New Milky Way Satellite in Bootes
V. Belokurov, D. B. Zucker, N. W. Evans +30
In this Letter, we announce the discovery of a new satellite of the Milky Way in the constellation of Bootes at a distance of 60 kpc. It was found in a systematic search for stella…
Efficient Implementation of the Plan Graph in STAN
M. Fox, D. Long
STAN is a Graphplan-based planner, so-called because it uses a variety of STate ANalysis techniques to enhance its performance. STAN competed in the AIPS-98 planning competition wh…
The multiple quasar Q2237+0305 under a microlensing caustic
T. Anguita, R. W. Schmidt, E. L. Turner +5
We use the high magnification event seen in the 1999 OGLE campaign light curve of image C of the quadruply imaged gravitational lens Q2237+0305 to study the structure of the quasar…
PDDL2.1: An Extension to PDDL for Expressing Temporal Planning Domains
M. Fox, D. Long
In recent years research in the planning community has moved increasingly toward s application of planners to realistic problems involving both time and many typ es of resources. F…
Candidate spectroscopic binaries in the Sloan Digital Sky Survey
D. Pourbaix, G. R. Knapp, P. Szkody +11
We have examined the radial velocity data for stars spectroscopically observed by the Sloan Digital Sky Survey (SDSS) more than once to investigate the incidence of spectroscopic b…
The cross-over from 2D to 3D percolation and its relationship to glass transition in thin films. Theory and numerical simulations
P. Sotta, D. Long
We consider here the percolation problem in thin films, both in the direction normal to the film and in the direction parallel to the film. We thereby describe here the cross-over…
A MaxBCG Catalog of 13,823 Galaxy Clusters from the Sloan Digital Sky Survey
B. P. Koester, T. A. McKay, J. Annis +23
We present a catalog of galaxy clusters selected using the maxBCG redsequence method from Sloan Digital Sky Survey photometric data. This catalog includes 13,823 clusters with velo…
How the shift of the glass transition temperature of thin polymer films depends on the adsorption with the substrate
D. Long, P. Sotta
Recent experiments have demonstrated that the glass transition temperature of thin polymer films can be shifted as compared to the same polymer in the bulk, the amplitude and the s…
JWST-TST Proper Motions: I. High-Precision NIRISS Calibration and Large Magellanic Cloud Kinematics
M. Libralato, A. Bellini, R. P. van der Marel +27
We develop and disseminate effective point-spread functions and geometric-distortion solutions for high-precision astrometry and photometry with the JWST NIRISS instrument. We corr…
Ultra-high-resolution Observations of Persistent Null-point Reconnection in the Solar Corona
X. Cheng, E. R. Priest, H. T. Li +21
Magnetic reconnection is a key mechanism involved in solar eruptions and is also a prime possibility to heat the low corona to millions of degrees. Here, we present ultra-high-reso…
Initial radiometric calibration of the High-Resolution EUV Imager () of the Extreme Ultraviolet Imager (EUI) instrument onboard Solar Orbiter
S. Gissot, F. Auchère, D. Berghmans +21
The telescope was calibrated on ground at the Physikalisch-Technische Bundesanstalt (PTB), Germany's national metrology institute, using the Metrology L…
Discovery of XO-6b: a hot Jupiter transiting a fast rotating F5 star on an oblique orbit
N. Crouzet, P. R. McCullough, D. Long +20
Only a few hot Jupiters are known to orbit around fast rotating stars. These exoplanets are harder to detect and characterize and may be less common than around slow rotators. Here…
The Automatic Inference of State Invariants in TIM
M. Fox, D. Long
As planning is applied to larger and richer domains the effort involved in constructing domain descriptions increases and becomes a significant burden on the human application desi…
SDSS spectroscopic survey of stars
Z. Ivezic, D. Schlegel, A. Uomoto +37
In addition to optical photometry of unprecedented quality, the Sloan Digital Sky Survey (SDSS) is also producing a massive spectroscopic database. We discuss determination of stel…
LOTIS, Super-LOTIS, SDSS and Tautenburg Observations of GRB 010921
H. S. Park, G. G. Williams, D. H. Hartmann +36
We present multi-instrument optical observations of the High Energy Transient Explorer (HETE-2)/Interplanetary Network (IPN) error box of GRB 010921. This event was the first gamma…
The Hercules-Aquila Cloud
V. Belokurov, N. W. Evans, E. F. Bell +23
We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The Cloud is centered at a Galactic longitude of about 40…
Coronal voids and their magnetic nature
J. D. Nölke, S. K. Solanki, J. Hirzberger +68
Extreme ultraviolet (EUV) observations of the quiet solar atmosphere reveal extended regions of weak emission compared to the ambient quiescent corona. The magnetic nature of these…
Cataclysmic Variables from SDSS I. The First Results
P. Szkody, S. F. Anderson, M. Agueros +27
The commissioning year of the Sloan Digital Sky Survey has demonstrated that many cataclysmic variables have been missed in previous surveys with brighter limits. We report the ide…
Modelling Mixed Discrete-Continuous Domains for Planning
M. Fox, D. Long
In this paper we present pddl+, a planning domain description language for modelling mixed discrete-continuous planning domains. We describe the syntax and modelling style of pddl+…
Long-range Casimir interactions between impurities in nematic liquid crystals and the collapse of polymer chains in such solvents
D. Bartolo, D. Long, J. -B. Fournier
The elastic interactions between objects embedded in a nematic liquid crystal are usually caused by the average distorsion-rather than by the fluctuations-of the nematic orientatio…
Discovery of an Unusual Dwarf Galaxy in the Outskirts of the Milky Way
M. J. Irwin, V. Belokurov, N. W. Evans +24
In this Letter, we announce the discovery of a new dwarf galaxy, Leo T, in the Local Group. It was found as a stellar overdensity in the Sloan Digital Sky Survey Data Release 5 (SD…
New Low Accretion-Rate Magnetic Binary Systems and their Significance for the Evolution of Cataclysmic Variables
G. D. Schmidt, P. Szkody, K. M. Vanlandingham +14
Discoveries of two new white dwarf plus M star binaries with striking optical cyclotron emission features from the Sloan Digital Sky Survey (SDSS) brings to six the total number of…
Lessons Learned from Sloan Digital Sky Survey Operations
S. J. Kleinman, J. E. Gunn, B. Boroski +12
Astronomy is changing. Large projects, large collaborations, and large budgets are becoming the norm. The Sloan Digital Sky Survey (SDSS) is one example of this new astronomy, and…
A New Milky Way Dwarf Satellite in Canes Venatici
D. B. Zucker, V. Belokurov, N. W. Evans +30
In this Letter, we announce the discovery of a new dwarf satellite of the Milky Way, located in the constellation Canes Venatici. It was found as a stellar overdensity in the North…
The Fall 2004 SDSS Supernova Survey
Masao Sako, Roger Romani, Josh Frieman +38
In preparation for the Supernova Survey of the Sloan Digital Sky Survey (SDSS) II, a proposed 3-year extension to the SDSS, we have conducted an early engineering and science run d…