Back To OSSE Solar Flare Web Page

Get Acrobat       

Get Ghostscript

1997 November 17 (C8.6)

A GOES C1.3 solar flare began at about 14:14 (51240 s) UT on 1997 November 17 with no correlated H-alpha event. OSSE received a BATSE solar-flare trigger at 51350 s and the four OSSE detectors slewed to the scan-angle position of the Sun and initiated +/- 4.5 degree on-source-off-source viewing strategies. No evidence for flare emission was found. However, while OSSE was still observing the Sun, a GOES C8.6 flare occurred at an H-alpha location of N21E30 (heliographic coordinates). The soft X-ray flux began at 14:59 (53940 s), peaked at 15:07 (54420 s), and ended at 15:22 (55320 s) UT (GOES Geophysical Data Web Site).

Significant emission up to about 200 keV was observed during two ~131-second data accumulation intervals (54224-54355, 54355-54486 s). Count rate time profiles in various energy windows at a temporal resolution of ~8 s are shown in Figure 1. A representative count spectrum is shown in Figure 2. The total fluence above 50 keV was 47.4 +/- 3.4 photons cm-2.

Figure 1

Figure 2

Last revised: 11 Dec 1997