Results 21 to 30 of about 604,375 (292)
NICMOS and VLBA observations of the gravitational lens system B1933+503 [PDF]
, 1998 NICMOS observations of the complex gravitational lens system B1933+503 reveal infrared counterparts to two of the inverted spectrum radio images. The infrared images have arc-like structures. The corresponding radio images are also detected in a VLBA map
Browne, I. W. A. +3 more
core +3 more sources
Diffuse radio emission in MACS J0025.4$-$1222: the effect of a major merger on bulk separation of ICM components [PDF]
, 2016 Mergers of galaxy clusters are among the most energetic events in the Universe. These events have significant impact on the intra-cluster medium, depositing vast amounts of energy - often in the form of shocks - as well as heavily influencing the ...
Clarke, A. O. +3 more
core +2 more sources
A multi-scale study of infrared and radio emission from Scd galaxy M33 [PDF]
, 2007 We investigate the energy sources of the infrared (IR) emission and their relation to the radio continuum emission at various spatial scales within the Scd galaxy M33.
Beck +55 more
core +2 more sources
Multi-frequency radio continuum mapping of giant radio galaxies [PDF]
Astronomy and Astrophysics Supplement Series, 1997 The giant radio galaxies NGC 315, DA 240, 3C 236, 3C 326, and NGC 6251 have been observed at 92 cm and 49 cm wavelengths with the Westerbork Synthesis Radio Telescope (WSRT) and at , 6.3 cm, and 2.8 cm using the Effelsberg 100-m telescope. These objects all exhibit strong polarized radio emission across the entire radio frequency domain. Their spectral
K.-H. Mack +3 more
openaire +1 more source
City Radio Map Construction for Wi-Fi-Based Citywide Indoor Positioning
IEEE Access, 2019 A Wi-Fi fingerprint consists of received signal strength values at a particular location along with the location information. A Wi-Fi radio map is constructed by maintaining a database of Wi-Fi fingerprints at various points in a building.
Dongsoo Han +3 more
doaj +1 more source
3D Radio Map-Based GPS Spoofing Detection and Mitigation for Cellular-Connected UAVs
IEEE Transactions on Machine Learning in Communications and Networking, 2023 With the upcoming 5G and beyond wireless communication system, cellular-connected Unmanned Aerial Vehicles (UAVs) are emerging as a new pattern to give assistance for target searching, emergency rescue, and network recovery.
Yongchao Dang +3 more
doaj +1 more source
Extremely red objects in the UKIDSS Ultra Deep Survey Early Data Release [PDF]
, 2006 We construct a sample of extremely red objects (EROs) within the UKIDSS Ultra Deep Survey by combining the Early Data Release with optical data from the Subaru/XMM–Newton Deep Field. We find a total of 3715 objects over 2013 arcmin2 with R−K > 5.3 and K≤
Almaini, O +11 more
core +2 more sources
Expanded Very Large Array Observations of the Nebula Around G79.29+0.46 [PDF]
, 2011 We have observed the radio nebula surrounding the Galactic luminous blue variable candidate G79.29+0.46 with the Expanded Very Large Array (EVLA) at 6 cm.
Agliozzo, C. +7 more
core +2 more sources
Self-mapping radio maps for location fingerprinting
Wireless Networks, 2014 Localisation of a mobile device in Wi-Fi based indoor environments has received much attention and is an important area of research, considering the uptake of devices with built-in Wi-Fi and often blanket coverage in enterprise. Most localisation techniques in this area require an off-line calibration phase where a radio map is manually built using the
Gareth Ayres, Jason Jones
openaire +3 more sources
New VLBA Identifications of Compact Symmetric Objects [PDF]
, 1999 The class of radio sources known as Compact Symmetric Objects (CSOs) is of particular interest in the study of the evolution of radio galaxies. CSOs are thought to be young (probably ~10^4 years), and a very high fraction of them exhibit HI absorption ...
A.B. Peck +9 more
core +2 more sources