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Detection of Sagittarius A* at 330 MHz with the Very Large Array
Michael E. Nord, T. Joseph W. Lazio, Namir E. Kassim +2
We report the detection of Sagittarius A*, the radio source associated with our Galaxy's central massive black hole, at 330 MHz with the Very Large Array. Implications for the spec…
Pulsar Parallaxes at 5 GHz with the Very Long Baseline Array
S. Chatterjee, J. M. Cordes, W. H. T. Vlemmings +3
We present the first pulsar parallaxes measured with phase-referenced pulsar VLBI observations at 5 GHz. Due to the steep spectra of pulsars, previous astrometric measurements have…
A Deep, High-Resolution Survey at 74 MHz
A. S. Cohen, H. J. A. Rottgering, M. J. Jarvis +2
We present a 74 MHz survey of a 165 square degree region located near the north galactic pole. This survey has an unprecedented combination of both resolution (25'' FWHM) and sensi…
A Low Frequency Survey of the Galactic Plane Near l=11 degrees: Discovery of Three New Supernova Remnants
C. L. Brogan, K. E. Devine, T. J. Lazio +5
We have imaged a 1 deg^2 field centered on the known Galactic supernova remnant (SNR) G11.2-0.3 at 74, 330, and 1465 MHz with the Very Large Array radio telescope (VLA) and 235 MHz…
Nonthermal Emission from the Arches Cluster (G0.121+0.017) and the Origin of -ray Emission from 3EG J1746-2851
F. Yusef-Zadeh, M. Nord, M. Wardle +3
High resolution VLA observations of the Arches cluster near the Galactic center show evidence of continuum emission at 3.6, 6, 20 and 90cm. The continuum emission at 90cm is…
NE2001. II. Using Radio Propagation Data to Construct a Model for the Galactic Distribution of Free Electrons
J. M. Cordes, T. J. W. Lazio
In Paper I we present a new model for the Galactic distribution of free electrons. In this paper we describe the input data and methodology for determining the structure and parame…