720 XTF Search Results (expand=subject;f1-spectral-Type=X-ray;f2-subject=GRB 970228);f1-spectral-Type%3DX-ray;f2-subject%3DGRB%20970228 Results for your query: expand=subject;f1-spectral-Type=X-ray;f2-subject=GRB 970228 Thu, 01 Jan 1970 12:00:00 GMT GRB 970228 w/X-ray counterpart. Eight hours after the detection of GRB 970228, BeppoSax was able to isolate an X-ray source at the location in the Orion constellation. This is the first X-ray counterpart data captured following a gamma-ray burst. Fri, 28 Feb 1997 12:00:00 GMT