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Low-Frequency Radio Transients in the Galactic Center
Scott D. Hyman, T. Joseph W. Lazio, Namir E. Kassim
We report the detection of a new radio transient source, GCRT J1746-2757, located only 1.1 degrees north of the Galactic center. Consistent with other radio transients toward the G…
Far-Infrared ISO Limits on Dust Disks around Millisecond Pulsars
T. J. W. Lazio, J. Fischer, R. S. Foster
We report 60 and 90 micron observations of 7 millisecond pulsars with the ISOPHOT instrument and describe our analysis procedures. No pulsars were detected, and typical (3σ) upper…
A New System of Parallel Isolated Nonthermal Filaments Near the Galactic Center: Evidence for a Local Magnetic Field Gradient
T. N. LaRosa, T. Joseph W. Lazio, Namir E. Kassim
We report the discovery of a system of isolated nonthermal filaments approximately 0.5 deg. northwest (75 pc in projection) of Sgr A. Unlike other isolated nonthermal filaments whi…
A Search for Supernova-Remnant Masers Toward Unidentified EGRET Sources
Z. Arzoumanian, F. Yusef-Zadeh, T. J. W. Lazio
Supernova remnants expanding into adjacent molecular clouds are believed to be sites of cosmic ray acceleration and sources of energetic gamma-rays. Under certain environmental con…
Multi-frequency VLBA Observations of the Compact Double B2 2050+36: Constraints on Interstellar Scattering Revisited
T. Joseph W. Lazio, A. L. Fey
We present multi-frequency observations with the Very Long Baseline Array of the compact double radio source B2 2050+36. Our observations are at 0.33, 0.61, 1.67, 2.3, and 8.4 GHz,…
Spatially-resolved Thermal Continuum Absorption against the Supernova Remnant W49B
C. K. Lacey, T. Joseph W. Lazio, Namir E. Kassim +3
We present sub-arcminute resolution imaging of the Galactic supernova remnant W49B at 74 MHz (25") and 327 MHz (6"), the former being the lowest frequency at which the source has b…