منابع مشابه
Optically Faint Microjansky Radio Sources.
We report on the identifications of radio sources from our survey of the Hubble Deep Field (HDF) and the Small Selected Area 13 fields, both of which comprise the deepest radio surveys to date at 1.4 and 8.5 GHz, respectively. About 80% of the microjansky radio sources are associated with moderate-redshift starburst galaxies or active galactic nuclei within the I-magnitude range of 17-24 with a...
متن کاملMid-infrared Identification of Faint Submillimeter Sources
Faint submillimeter sources detected with the Submillimeter Common-User Bolometer Array on the James Clerk Maxwell Telescope have faced an identification problem due to the telescope’s broad beam profile. Here we propose a new method to identify such submillimeter sources with a mid-infrared image having a finer point spread function. The Infrared Space Observatory has provided a very deep 6.7μ...
متن کاملAre the infrared-faint radio sources pulsars?
Infrared-Faint Radio Sources (IFRS) are objects which are strong at radio wavelengths but undetected in sensitive Spitzer observations at infrared wavelengths. Their nature is uncertain and most have not yet been associated with any known astrophysical object. One possibility is that they are radio pulsars. To test this hypothesis we undertook observations of 16 of these sources with the Parkes...
متن کاملDetection of the Angular Correlation of Faint X-ray Sources
We have analyzed a set of deep ROSAT observations with a total sky coverage of 40 square degrees to search for clustering of faint X-ray sources. Using the resulting catalog of discrete X-ray sources, we detect, for the first time in X-rays, a positive correlation on angular scales of 0.5–10. When corrected for a bias due to limited spatial resolution which amplifies the correlation, the observ...
متن کاملOptical identifications of faint radio sources 1 1997
Deep imaging and spectroscopy have been carried out for optical counterparts of a sample of 68 faint radio sources (S > 0.2 mJy) in the “Marano Field”. About 60% of the sources have been optically identified on deep CCD exposures (limit R ' 24.0) or ESO 3.6–m plates (limit bJ ' 22.5). Thirty–four spectra (50% of the total radio sample) were obtained with the ESO 3.6–m telescope and 30 redshifts...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1980
ISSN: 0074-1809
DOI: 10.1017/s0074180900068479