NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-22 T01:59:40 PDT
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Reference(s) for object 4C +21.23

17 reference(s) found in NED.


1. 1996ApJS..103..427G GREGORY, P. C.,... THE GB6 CATALOG OF RADIO SOURCES
2. 1996AJ....111.1945D DOUGLAS, J. N.,... THE TEXAS SURVEY OF RADIO SOURCES COVERING -35.5^deg^ <{delta} < 71.5^deg^ AT 36...
3. 1995AuJPh..48..143S SLEE, O. Radio sources observed with the Culgoora circular array
4. 1992ApJS...79..331W WHITE, R. L., A... A NEW CATALOG OF 30,239 1.4 GHz SOURCES
5. 1991ApJS...75.1011G GREGORY, P. C.,... THE 87GB CATALOG OF RADIO SOURCES COVERING 0^deg^ < {delta} < +75^deg^ AT 4.85 G...
6. 1991ApJS...75....1B BECKER, R. L., ... A NEW CATALOG OF 53,522 4.85 GHz SOURCES
7. 1990ApJS...72..621L LANGSTON, G. I.... THE SECOND MIT-GREEN BANK 5 GHz SURVEY
8. 1977AuJPA..43....1S SLEE, O. Culgoora-3 list of radio source measurements
9. 1975AuJPA..36....1S SLEE, O., HIGGI... Culgoora-2 list of radio source measurements at 80 MHz
10. 1975AJ.....80..931V Viner, M., Eric... 26.3-MHz radio source survey. II - Radio source positions and fluxes
11. 1973AJ.....78.1030R Roger, R., Brid... The low-frequency spectra of nonthermal radio sources
12. 1970AJ.....75..764O OLSEN, E. T. OPTICAL IDENTIFICATION OF RADIO SOURCES SELECTED FROM THE 4C CATALOGUE
13. 1969MNRAS.143..301B Braude, S. Ya.;... The spectra of discrete radio sources at decametric wavelengths-II
14. 1969MNRAS.143..289B Braude, S., Leb... The spectra of discrete radio sources at decametric wavelengths-I
15. 1968AJ.....73..717B Bridle, A. H.; ... Observations of radio sources at 10.03 MHz
16. 1967AJ.....72..738O Olsen, E. T. Accurate positions of selected 4C sources
17. 1965MmRAS..69..183P Pilkington, J. ... A Survey of Radio Sources Between Declinations 20^deg^ and 40^deg^

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