منابع مشابه
A Deep, High-resolution Survey at 74 Mhz
We present a 74 MHz survey of a 165 deg2 region located near the north Galactic pole. This survey has an unprecedented combination of both resolution (2500 FWHM) and sensitivity ( as low as 24 mJy beam 1). We detect 949 sources at the 5 level in this region, enough to begin exploring the nature of the 74 MHz source population. We present differential source counts, spectral index measurements, ...
متن کاملA Deep 150 MHz GMRT Survey in Eridanus
We present results of a 150 MHz survey of a field centered on ǫ Eridani, undertaken with the Giant Metrewave Radio Telescope (GMRT). The survey covers an area with a diameter of ∼ 2, has a spatial resolution of ∼ 30 and a noise level of σ = 3.1 mJy at the pointing centre. These observations provide a deeper and higher resolution view of the 150 MHz radio sky than the 7C survey (although the 7C ...
متن کاملFirst Results of the 74 MHz VLA-Pie Town Link. Hercules A at Low Frequencies
We present the results of the first successful observations of the Pie Town link with the Very Large Array (VLA) at 74 MHz on Hercules A. The improvement in resolution from 25 arcsec to 10 arcsec resolves the helicaland ring-like features seen at higher frequencies. We also present new high dynamic range images of this powerful radio galaxy at 325 MHz. Our low frequency observations confirm the...
متن کاملA Survey for Transient Astronomical Radio Emission at 611 MHz
We have constructed and operated the Survey for Transient Astronomical Radio Emission (STARE) to detect transient astronomical radio emission at 611 MHz originating from the sky over the northeastern United States. The system is sensitive to transient events on timescales of 0.125 s to a few minutes, with a typical zenith flux density detection threshold of approximately 27 kJy. During 18 month...
متن کاملUpper 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...
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ژورنال
عنوان ژورنال: The Astrophysical Journal Supplement Series
سال: 2004
ISSN: 0067-0049,1538-4365
DOI: 10.1086/380783