The Molonglo reference catalog/1 Jansky radio source survey. I. Radio galaxy identifications
The Molonglo reference catalog/1 Jansky radio source survey. I. Radio galaxy identifications
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DOI：
10.1086/192353
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发表时间：
1996-11
影响因子：
8.7
通讯作者：
P. McCarthy;V. K. Kapahi;W. Breugel;S. E. Persson;R. Athreya;C. R. Subrahmanya
中科院分区：
文献类型：
--
作者：
P. McCarthy;V. K. Kapahi;W. Breugel;S. E. Persson;R. Athreya;C. R. Subrahmanya
This is the first in a series of papers discussing the properties of a complete set of radio sources selected near {ital S}{sub 408}=1 Jy. We present optical or infrared identifications for a sample of 452 radio galaxies. The sources were selected from the 408 MHz Molonglo Reference Catalog, restricted only by flux density and position on the sky, as follows: {ital S}{sub 408}{ge}0.95 Jy and {minus}30{degree}{lt}decl. (1950){lt}{minus}20{degree}, and 9{sup h}20{sup m}{lt}R.A.(1950){lt}14{sup h}4{sup m} or 20{sup h}20{sup m}{lt}R.A.(1950){lt}6{sup h}14{sup m}. This complete sample, the MRC/1 Jy survey, contains 558 radio galaxies or quasars, of which six are occulted by bright stars or galaxies and two are multiple confused sources. Of the remaining 550 sources, 527, or 96{percent}, are identified to an {ital r} magnitude of 25, and eight additional sources are identified to {ital K}=19. Of the 17 unocculted objects that remain unidentified, 15 are sources for which we have either poor radio maps or inadequate optical/IR images. This paper presents finding charts and astrometric positions for the 452 sources that are not identified as either quasars or BL Lacertae objects. Magnitudes in the {ital r} passband accurate to typically 0.1 mag are given for 353 of the radio galaxymore » identifications. Redshifts for 268 of the galaxies are also listed; these have been derived from 450 spectroscopic observations. The radio observations, quasar and BL Lac identifications, spectroscopy, and near-IR images will be presented in subsequent papers in this series. {copyright} {ital 1996 The American Astronomical Society.}« less
This is the first in a series of papers discussing the properties of a complete set of radio sources selected near {ital S}{sub 408}=1 Jy. We present optical or infrared identifications for a sample of 452 radio galaxies. The sources were selected from the 408 MHz Molonglo Reference Catalog, restricted only by flux density and position on the sky, as follows: {ital S}{sub 408}{ge}0.95 Jy and {minus}30{degree}{lt}decl. (1950){lt}{minus}20{degree}, and 9{sup h}20{sup m}{lt}R.A.(1950){lt}14{sup h}4{sup m} or 20{sup h}20{sup m}{lt}R.A.(1950){lt}6{sup h}14{sup m}. This complete sample, the MRC/1 Jy survey, contains 558 radio galaxies or quasars, of which six are occulted by bright stars or galaxies and two are multiple confused sources. Of the remaining 550 sources, 527, or 96{percent}, are identified to an {ital r} magnitude of 25, and eight additional sources are identified to {ital K}=19. Of the 17 unocculted objects that remain unidentified, 15 are sources for which we have either poor radio maps or inadequate optical/IR images. This paper presents finding charts and astrometric positions for the 452 sources that are not identified as either quasars or BL Lacertae objects. Magnitudes in the {ital r} passband accurate to typically 0.1 mag are given for 353 of the radio galaxymore » identifications. Redshifts for 268 of the galaxies are also listed; these have been derived from 450 spectroscopic observations. The radio observations, quasar and BL Lac identifications, spectroscopy, and near-IR images will be presented in subsequent papers in this series. {copyright} {ital 1996 The American Astronomical Society.}« less