GX 301-2 = 4u 1223-62

M. Oda and the Hakucho Team report the detection of an x-ray flaring of the x-ray pulsar GX 301-2. The x-ray intensity of this source became above detection limit on Apr. 5 and reached the maximum on Apr. 7. The peak intensity was 90 millicrab in 1-9 keV and 550 millicrab in 9-22 keV on Apr. 7. The apparent pulse period is estimated to be 703s.8 +/- 0s.2 by a standard folding method from the data of Apr. 5-8. The time of the flare center is in agreement with the orbital ephemeris given by Watson, Warwick and Corbet (1982, M.N. to be published), which predicts the next flare center as l982 May 19.4 +/- 1.0 UT.