Scientific instrumentation of GINGA consists of the Large Area Counter (LAC), the All Sky Monitor (ASM), and the Gamma-ray Burst Detector (GBD). The LAC, the main detector of GINGA, covers the energy range of 2-70 keV with an effective area of 4000 cm2. More details about the satellite and the instruments can be found at ISAS and NASA/GSFC. For the LAC, please refer to Turner et al. (1989), PASJ 41, 345 and Hayashida et al. (1989) PASJ 41, 373. For the ASM and GBD, see Tsunemi et al. (1989) PASJ, 41, 291 and Murakami et al. (1989), PASJ, 41, 405, respectively.