O ct 1 99 7 VLA 1 Observations of Radio Variability of ER Vulpeculae in 1995

ar X iv : a st ro - p h / 99 10 18 9 v 1 1 1 O ct 1 99 9 Microlensing & Scintillation of Gravitationally Lensed Compact Radio Sources : Evidence for MACHOs ?

We present the first unambiguous case of external variability of an extra–galactic radio source, the CLASS gravitational lens B1600+434, consisting of two images lensed by an edge–on disk galaxy. The VLA 8.5–GHz difference light curve of the lens images shows external variability at the 14.6–σ confidence level. Although the current single–frequency VLA observations cannot conclusively exclude s...

ar X iv : a st ro - p h / 99 10 42 0 v 1 2 2 O ct 1 99 9 Upper Limits on the Continuum Emission from Geminga at 74 and 326 MHz

We report a search for radio continuum emission from the gamma-ray pulsar Geminga. We have used the VLA to image the location of the optical counterpart of Geminga at 74 and 326 MHz. We detect no radio counterpart. We derive upper limits to the pulse-averaged flux density of Geminga, taking diffractive scintillation into account. We find that diffractive scintillation is probably quenched at 74...

ar X iv : a st ro - p h / 98 10 39 2 v 1 2 3 O ct 1 99 8 A comparison of the optical properties of radio - loud and radio - quiet quasars

We have made radio observations of 87 optically selected quasars at 5 GHz with the VLA in order to measure the radio power for these objects and hence determine how the fraction of radio-loud quasars varies with redshift and optical luminosity. The sample has been selected from the recently completed Edinburgh Quasar Survey and covers a redshift range of 0.3 ≤ z ≤ 1.5 and an optical absolute ma...

ep - p h / 95 10 44 8 v 2 3 1 O ct 1 99 5 CMU - HEP 95 - 18 DOE - ER / 40682 - 106 The Radiative Charmed Baryon Decay Ξ

VLA/JVLA monitoring of bright northern radio sources⋆

We report multiple epoch VLA/JVLA observations of 89 northern hemisphere sources, most with 37 GHz flux density >1 Jy, observed at 4.8, 8.5, 33.5, and 43.3 GHz. The high frequency selection leads to a predominantly flat spectrum sample, with 85% of our sources being in the Planck Early Release Compact Source Catalog (ERCSC). These observations allow us to: 1) validate Planck’s 30 and 44 GHz flu...