TITLE: GCN GRB OBSERVATION REPORT NUMBER: 372 SUBJECT: GRB 990704 X-ray Observations DATE: 99/07/06 02:42:03 GMT FROM: Toshio Murikami at ISAS T. Murakami, A. Yoshida, N. Kawai, T. Tamura, S. Terada and T. Tsuru on behalf of the ASCA team report : ASCA is observing the SAX NFI position (GCN #366) of GRB 990704 from July 5.40(UT). Preliminary analysis of the first four orbits of the SIS data at the tracking station shows an X-ray source at a position of RA(2000)= 184.867 DEC(2000)= -3.833 with the error radius of 1.5 arcmin. The source is fading and the average intensity of the four orbits is 2x10E-13 erg/cm2/sec in 2-10 keV band. ASCA is continuing its observation at least until July 6.13 (UT).