Nobeyama Radioheliograph Event 19980818_2300

EventID : 19980818_2300
Keyword : Flare
Start : 1998-08-18T22:45:22.000Z
Peak : 1998-08-18T23:00:06.000Z
End : 1998-08-19T00:03:20.000Z
Position: N31E82
X (arcsec) : -815
Y (arcsec) : 481
Maximum Correlation @17GHz (x10^-4) : 376
Maximum Brightness Temperature @17GHz : 8.4e+06
Area_src/Area_beam @17GHz : 7.6
Maximum flux @17GHz (SFU) : 213
Maximum flux @34GHz (SFU) : 99
Number of Impulsive fluctuation : 0
NOAA Number:
Yohkoh HXT (L,M1,M2,H): (2397,2819,1243,732)

(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

SXT 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,...