Results 81 to 90 of about 4,646,519 (213)
Barium Abundances from the LAMOST Medium-Resolution Survey Stellar Spectra
The Astrophysical Journal Supplement SeriesBased on a template-matching method, we estimate the barium (Ba) abundances for stellar spectra from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Medium-Resolution Spectroscopic Survey (MRS).
Tian-Yi Chen +9 more
doaj +1 more source
The SPHEREx Target List of Ice Sources (SPLICES)
The Astrophysical Journal, 2023 One of the primary objectives of the SPHEREx mission is to understand the origin of molecules such as H _2 O, CO _2 , and other volatile compounds at the early stages of planetary system formation.
Matthew L. N. Ashby +18 more
doaj +1 more source
An Efficient Targeting Strategy for Multiobject Spectrograph Surveys: the Sloan Digital Sky Survey “Tiling” Algorithm [PDF]
, 2001 Large surveys using multiobject spectrographs require automated methods for deciding how to efficiently point observations and how to assign targets to each pointing.
M. Blanton +6 more
semanticscholar +1 more source
Technosignature Searches with Real-time Alert Brokers
The Astronomical JournalWe present an exploration of technosignature research that is possible using real-time alert brokers from surveys such as the Zwicky Transient Facility (ZTF) and the upcoming Legacy Survey of Space and Time (LSST).
Eleanor M. Gallay +2 more
doaj +1 more source
Symposium - International Astronomical Union, 1997 Prior to the current Compton Gamma Ray Observatory (Compton) mission, no comprehensive all-sky gamma-ray surveys had been performed. There were, however, some surveys performed over limited energy bands and/or over portions of the sky. These include the HEAO-A4 hard X-ray survey and the COS-B and SAS-2 high-energy gamma-ray surveys.
openaire +1 more source
A Large, Uniform Sample of X-Ray-emitting AGNs: Selection Approach and an Initial Catalog from the ROSAT All-Sky and Sloan Digital Sky Surveys [PDF]
, 2003 Many open questions in X-ray astronomy are limited by the relatively small number of objects in uniform optically identified and observed samples, especially when rare subclasses are considered or when subsets are isolated to search for evolution or ...
S. Anderson +28 more
semanticscholar +1 more source
The Astrophysical JournalOptical observations of gamma-ray bursts (GRBs) contemporaneous with their prompt high-energy emission are rare, but they can provide insights into the physical processes underlying these explosive events.
Rahul Jayaraman +3 more
doaj +1 more source
Summary Talk : Multi-Wavelength Sky Surveys [PDF]
Symposium - International Astronomical Union, 1997 An astronomer's career can be viewed in a 3-dimensional space where the (nearly orthogonal) axes are : – the objects of interest (from planets to the Universe),– techniques (from instrument design to analytic calculations),– the wavelength (from the radio to gamma rays).
openaire +1 more source
Photometric Analysis of Asteroids in the Phocaea Region
The Astronomical JournalThe Phocaea asteroid family, one of the large ancient families located in the inner main belt, may be the sources of near-Earth asteroids (NEAs) due to the nearby 3:1 mean motion resonance with Jupiter, the ν 6 secular resonance, and the Yarkovsky and ...
Xiaoyun Xu +9 more
doaj +1 more source
, 1998 I review the development of UV and EUV astronomy, covering the spectral range from 5 to 300 nm, with emphasis on sky surveys for discrete sources. I discuss studies which resulted in lists of sources observed by imaging and deliberately omit most spectroscopic studies.
openaire +2 more sources