3C 279 (dεn kכl am bak 4C–05.55, NRAO 413, εn PKS 1253–05) na optik vaylεnt vεriεbul kwasar (OVV), we dεn kכl insay di astronomik kכmyuniti fכ in vεryushכn dεm na di visible, redio εn εks-ray bεnd dεm. [2] . di kwasar dεn bin obsεv se i bin de כnda wan tεm we i bin de wok tranga wan frכm 1987 te to 1991.[3] Di Rosemary Hill Observatory (RHO) bigin fɔ wach 3C 279 insay 1971,[3] di tin we di Compton Gamma Ray Observatory bin si mɔ insay 1991, we dɛn nɔ bin de ɛkspɛkt se na wan pan di tin dɛn we brayt pas ɔl na di skay.[3] 4] . I de bak wan pan di say dɛn we brayt ɛn we kin chenj pas ɔl na di gama rayt skay we di Fɛmi Gama-ray Spays Tɛliskɔp de wach. Dɛn bin yuz am as kalibrayta sɔs fɔ Ivin Ɔrayzɔn Tɛliskɔp ɔbshɔbishɔn dɛn fɔ M87* we bin rilizɔt di fɔs pikchɔ fɔ wan blak ol.