VPHAS+ DR4 r filter survey collection

The VST Photometric Halpha Survey of the Southern Galactic Plane and Bulge (VPHAS+) is surveying the southern Milky Way in u, g, r, i and Halpha at ?1 arcsec angular resolution....南天银道面与银核VST测光Hα巡天（VST Photometric Halpha Survey，简称VPHAS+）正以约1角秒（arcsec）的角分辨率，在u、g、r、i及Hα波段对南天银河系开展巡天观测。