Nobeyama Radioheliograph Event 20000725_0247


  The 0.1sec 34GHz data is abnormal.
  Special care is necessary when using the given images in the archive.

EventID : 20000725_0247
Keyword : Flare
Start : 2000-07-25T02:46:37.000
Peak : 2000-07-25T02:47:54.000
End : 2000-07-25T03:02:07.000
Position: N04W05
X (arcsec) : 98
Y (arcsec) : -10
Maximum Correlation @17GHz (x10^-4) : 3125
Maximum Brightness Temperature @17GHz : 1.1e+08
Area_src/Area_beam @17GHz : 8.4
Maximum flux @17GHz (SFU) : 1073
Maximum flux @34GHz (SFU) : 1407
Number of Impulsive fluctuation : 571
GOES: M8.0
NOAA Number:
Yohkoh HXT (L,M1,M2,H): (587,282,205,133)

(top panel) GOES plot.
(bottom panel) NoRH 17/34 GHz correlation plot; (white line) 17 GHz (yellow line) 34 GHz .

Full sun 17GHz image. The flare region is indicated by the solid box.


Partial 17/34GHz images. Color map shows brightness temperature, contour shows 17GHz (r-l)/(r+l) levels, where 'r' and 'l' indicates right- and left-handed circularly-polarized components, respectively. Field of View is 314. x 314. arcsec
Contour levels of the thick lines are (r-l)/(r+l)=-0.1,-0.2,.. and those of the thin lines are (r-l)/(r+l)= +0.1,+0.2,...
Orange circle at top-left indicates the half-max. beam size

(top) NoRH 17/34 GHz correlation plot; Diamonds indicate the data points of event mode (50ms/100ms cadence): (white line) 17 GHz (yellow line) 34 GHz .
(bottom) Temporal derivative of correlation plot. Unit is (s^-1). Dotted line indicate 1 %/sec boundary.

50/100ms movie
50/100ms javamovie

HXT image overlaid with NoRH contours. (green/blue) NoRH 17/34GHz brightness temperatures in logarithmic scale. Field of View is the same as Partial Image above Contour levels are log10(Tb) = 5,6,7,8,...