20 JANUARY 2005 FLARECORONAS OBSERVATIONS Kuznetzov Sergey (PI), [email protected], Kurt Victoria, [email protected], Yushkov Boris, clef@srd,sinp.msu.ru, Svertilov Sergey
Skobeltzyn Institute of Nuclear Physics, Moscow State University
Kudela Karel (co-PI) Institute of Experimental Physics, Slovak Academy of Sciences, Kosice, [email protected] RHESSI workshop
20 January 2005 flare Proton onset
Evolution of different parameters of the flare emissionThe phases correspond to that of 11 JUNE 1991 flare.
Time profiles of the low and high energy gamma-ray emissionHigh energy emission is delayed compared to the low one.
Time profiles in all the energy windows
Zoomed time profiles
Energy spectra in the phases IA and IB Distinct 0 component is seen in the phase IB. The absolute flux is compared with that of SPRN- X-ray detector onboard CORONAS
Comparison of RHESSI and SPRN time profiles in similar energy windows.
What we see at the end of the phase IBDecay of bremmstrahlung emission becomes more steep than that of 0 emission. It seems that variation of the intensities becomes asynchronious.
Plasma temperature begins to decrease at the end of the phase IB
If the L>L1 than escaping time shifted to more earlier time.????The shortest path of protons L1 =1.055R Time delay of Ep=5 GeV (Vp=0.987c) relative to gamma-ray is 35s Escaping time must be near 06:48 UT Remember that 06:48 UT is the crucial point in the flare development
R=0.984a.e, -ray emission time of flight=490.5stime of max NM T NM = 06:52:30 UT corresponds to Ep=500 MeV,than time delay T NM relative -ray emission maximum T=06:46:30 UT is equal to 360 s .In this case proton time of flight is Tflight=(490+360) s. Vp (500 MeV)=0.76c. In this case proton path L= Tflight *Vp=1.32R and time difference between 5 GeV and 500 MeV protons onset time has to be 195 s.
This value correspond l to NM rise time duration..