3 minute oscillations above Sunspots CDS/TRACE Observations of transition region lines(2.1)

 

Observational setup

 Thirteen sunspots observed between 25 April 2001 and 25 March 2002

 CDS

 TRACE
  • Observations of sunspot in 171 Å channel at 16-39 s cadence
  • GIS observations allows one to investigate relative contributions of coronal and transition region lines to the TRACE 171 Å channel intensity