Results 11 to 20 of about 140,683 (272)
The Astrophysical Journal, 2022 In this work, we present polarization profiles for 23 millisecond pulsars observed at 820 and 1500 MHz with the Green Bank Telescope as part of the NANOGrav pulsar timing array.
H. M. Wahl +30 more
doaj +1 more source
Imaging through turbulence with a quadrature-phase optical interferometer [PDF]
, 2005 We present an improved technique for imaging through turbulence at visible wavelengths using a rotation shearing pupil-plane interferometer, intended for astronomical and terrestrial imaging applications.
Dimotakis, Paul E. +4 more
core +1 more source
Using gamma regression for photometric redshifts of survey galaxies [PDF]
, 2015 Machine learning techniques offer a plethora of opportunities in tackling big data within the astronomical community. We present the set of Generalized Linear Models as a fast alternative for determining photometric redshifts of galaxies, a set of tools ...
Cameron, E. +5 more
core +2 more sources
A Method to Measure Photometries of Moderately Saturated UVOT Sources
The Astrophysical Journal Supplement Series, 2023 For bright transients such as gamma-ray bursts (GRBs), the Ultra-Violet/Optical Telescope (UVOT) operates under event mode at early phases, which records incident positions and the arrival time for each photon.
Hao Zhou +4 more
doaj +1 more source
Analyzing astronomical data with machine learning techniques
Astronomical and Astrophysical Transactions, 2022 Classification is a popular task in the field of machine learning (ML) and artificial intelligence (AI), and it happens when outputs are categorical variables. There are a wide variety of models that attempt to draw some conclusions from observed values, so classification algorithms predict categorical class labels for use in classifying new data ...
openaire +2 more sources
The Data Big Bang and the Expanding Digital Universe: High-Dimensional, Complex and Massive Data Sets in an Inflationary Epoch [PDF]
, 2010 Recent and forthcoming advances in instrumentation, and giant new surveys, are creating astronomical data sets that are not amenable to the methods of analysis familiar to astronomers.
McCollum, Bruce +2 more
core +4 more sources
Astrometric Calibration and Performance of the Dark Energy Spectroscopic Instrument Focal Plane
The Astronomical Journal, 2023 The Dark Energy Spectroscopic Instrument, consisting of 5020 robotic fiber positioners and associated systems on the Mayall telescope at Kitt Peak, Arizona, is carrying out a survey to measure the spectra of 40 million galaxies and quasars and produce ...
S. Kent +48 more
doaj +1 more source
Disorientasi Harmonisasi Rumah Tangga dalam Keluarga Muslim di Era Digital
Medina-Te, 2022 Islamic studies with an astronomical approach are interesting and important, because the history of the development of Muslims in religious practice cannot be separated from the astronomical field as well as advanced technology and also science.
Sarkowi Sarkowi +3 more
doaj +1 more source
Dark Matter Indirect Detection [PDF]
EPJ Web of Conferences, 2020 This is an overview of recent developments and future prospects in the search for dark matter and new physics with astronomical and astro-particle techniques.
Profumo Stefano
doaj +1 more source
Near-infrared integral-field spectroscopy of HD209458b [PDF]
, 2006 We present first results of an exploratory study to use integral field spectroscopy to observe extrasolar planets. We focus on transiting "Hot Jupiters" and emphasize the importance of observing strategy and exact timing.
Angerhausen, Daniel +2 more
core +2 more sources