SUMER study #228: Scans in O III, Si IV, He I


Disk center in Si IV (left) and He I (right, approx. 2 h later)

Remarks: The scans were taken before and after a study about high velocity events (JOP015). Estimates of four parameters (continuum and line intensity, line shift and width) were calculated on board - maybe not always successful - and transmitted instead of the full spectral resolution.


O IV 1407.3 (174 000 K) + O III 703.8 (91 000 K)



continuum and line intensity, line shift and width


Si IV 1393.7 (63 000 K)



continuum and line intensity, line shift and width


He I 584.3 (20 000 K)



continuum and line intensity, line shift and width


IED, 14.Jan.00