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The Miyun 232 MHz General Catalogue: A Reliability and Positional Uncertainties Study

  • B. Peng (a1), W. Yuan (a1), R. Nan (a1) and Y. Yan (a1)

Extract

A meter-wave sky survey of the region north of declination +30°, excluding only four fields straddling the Galactic plane (each 8° × 8° in angular size), has been conducted with the Miyun Synthesis Radio Telescope operating at 232 MHz. The reduced Miyun General Catalogue contains 34,426 radio sources in total. To distinguish which sources were not observed by other sky surveys, we first identify sources in the MGC with those in the 6C (151 MHz) catalogue, using a matching radius of 100 arcseconds. The remaining MGC objects were then matched with the B2/B3 (408 MHz), 4C (178 MHz), Texas (365 MHz, 1400 MHz) and 87GB (4.85 GHz) catalogues. 6850 MGC sources were found to lack any radio counterpart in these reference catalogues. It means 19.9% of sources listed in the MGC are probably new.

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References

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Baldwin, J.E., et al. 1985 Mon. Not. R. astron. Soc., 217, 717.
Hales, S.E.G., et al. 1991 Mon. Not. R. astron. Soc., 251, 46.

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