Results 31 to 40 of about 160,758 (264)

The XXL Survey: : XXIX. GMRT 610 MHz continuum observations [PDF]

open access: yes, 2018
Accepted for publication in a forthcoming issue of Astronomy & Astrophysics. Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO.We present the 25 square-degree GMRT-XXL-N 610 MHz radio continuum survey, conducted at 50 cm wavelength ...
Birkinshaw, Mark   +20 more
core   +10 more sources

The NEO Surveyor Near-Earth Asteroid Known Object Model

open access: yesThe Planetary Science Journal, 2023
The known near-Earth object (NEO) population consists of over 32,000 objects, with a yearly discovery rate of over 3000 NEOs per year. An essential component of the next generation of NEO surveys is an understanding of the population of known objects ...
Tommy Grav   +6 more
doaj   +1 more source

Updated Atomic Data and Calculations for X-ray Spectroscopy

open access: yes, 2012
We describe the latest release of AtomDB, version 2.0.2, a database of atomic data and a plasma modeling code with a focus on X-ray astronomy. This release includes several major updates to the fundamental atomic structure and process data held within ...
A. R. Foster   +48 more
core   +1 more source

Thirty years of SN 1980K: Evidence for light echoes [PDF]

open access: yes, 2012
We report optical and mid-infrared photometry of SN 1980K between 2004 and 2010, which show slow monotonic fading consistent with previous spectroscopic and photometric observations made 8 to 17 years after outburst.
Andrews, Jennifer E.   +9 more
core   +1 more source

Discovery of Four Gravitationally Lensed Quasars from the Sloan Digital Sky Survey [PDF]

open access: yes, 2007
We present the discovery of four gravitationally lensed quasars selected from the spectroscopic quasar catalog of the Sloan Digital Sky Survey. We describe imaging and spectroscopic follow-up observations that support the lensing interpretation of the ...
Abazajian K.   +37 more
core   +2 more sources

Nanoscale Mapping of Plasmonic Charge Transport in Nano‐Resonators Based on Resistive Switching Materials

open access: yesAdvanced Functional Materials, EarlyView.
In this strategy, a conductive nano‐probe is employed to induce nanoscale phase transitions and map the nanoscale conductivity and trap density of GST films. By utilizing the contrasting properties of phase‐change states, nano‐resonators are fabricated that exhibit plasmonic conduction and dramatically different transport characteristics.
Sunwoo Bang   +4 more
wiley   +1 more source

Nonparametric Methods in Astronomy: Think, Regress, Observe -- Pick Any Three [PDF]

open access: yes, 2018
Telescopes are much more expensive than astronomers, so it is essential to minimize required sample sizes by using the most data-efficient statistical methods possible.
Jermyn, Adam S., Steinhardt, Charles L.
core   +2 more sources

Radio Astronomy Data Model for Single-Dish Multiple-Feed Telescopes, and Robledo Archive Architecture

open access: yes, 2008
6 pages, 2 figures, to appear in the accompanying CD-ROM to Highlights of Spanish Astrophysics IV, 2007, eds. F. Figueras, J.M. Girart, M. Hernanz, C. Jordi (Springer)
Morata, O.   +9 more
openaire   +2 more sources

Markarian Multiwavelength Data Center (MMDC): A Tool for Retrieving and Modeling Multitemporal, Multiwavelength, and Multimessenger Data from Blazar Observations

open access: yesThe Astronomical Journal
The Markarian Multiwavelength Data Center ( MMDC ) is a web-based tool designed for accessing and retrieving multiwavelength and multimessenger data from blazar observations.
N. Sahakyan   +9 more
doaj   +1 more source

GRANDMA and HXMT Observations of GRB 221009A: The Standard Luminosity Afterglow of a Hyperluminous Gamma-Ray Burst—In Gedenken an David Alexander Kann

open access: yesThe Astrophysical Journal Letters, 2023
Object GRB 221009A is the brightest gamma-ray burst (GRB) detected in more than 50 yr of study. In this paper, we present observations in the X-ray and optical domains obtained by the GRANDMA Collaboration and the Insight Collaboration.
D. A. Kann   +115 more
doaj   +1 more source

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