Details on Acronym: S4
S4 (Strong Source, list 4) Write:<<S4 HHMM+DDA>>
<<S4 HHMM+DDd>> N: 484 Object:(Rad) (SIMBAD class: Radio = Radio Source) Ref:=1978AJ.....83..451P byPAULINY-TOTH I.I.K. , WITZEL A., PREUSS E., KUHR H., KELLERMANN K.I., FOMALONT E.B., DAVIS M.M. Astron. J., 83, 451-474 (1978) The 5-GHz strong source surveys. IV. Survey of the area between declination 35 and 70° and summary of source counts, spectra and optical identifications. o<S4 HHMM+DDd> or <S4 HHMM+DDA> N=484 Originof the Acronym: A = Assigned by the author(s)
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