The Molonglo Reference Catalog/1 jansky radio source survey. I. Radio galaxy identifications

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1086/192353· OSTI ID:467140

McCarthy, P J ^[1]; Kapahi, V K ^[2]; van Breugel, W ^[2]; Persson, S E ^[1]; Athreya, R M; Subrahmanya, C R ^[3]

---

1. The Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, California 91101 (United States)
2. National Optical Astronomy Observatories, Cerro Tololo Inter-American Observatory
3. National Center for Radio Astrophysics, TIFR, Poona University Campus, P.O. Box 3, Ganeshkhind, Pune 411 007 (India)

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 galaxy 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.}

• Research Organization: Lawrence Livermore National Laboratory
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 467140
• Journal Information: Astrophysical Journal, Supplement Series, Journal Name: Astrophysical Journal, Supplement Series Journal Issue: 1 Vol. 107; ISSN 0067-0049; ISSN APJSA2
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CATALOGS
COSMIC RADIO SOURCES
EXPERIMENTAL DATA
GALAXIES
IMAGES
INFRARED RADIATION
PHOTOMETRY
RED SHIFT
VISIBLE RADIATION