TitleThe Fourth VLBA Calibrator Survey: VCS4
AuthorsPetrov, L.; Kovalev, Y. Y.; Fomalont, E. B.; Gordon, D.
AbstractThis paper presents the fourth extension to the VLBA Calibrator Survey, containing 258 new sources not previously observed with very long baseline interferometry (VLBI). This survey, based on three 24 hr Very Long Baseline Array observing sessions, fills remaining areas on the sky above declination -40° where the calibrator density is less than one source within a 4° radius disk in any given direction. The share of ...
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