20040110.191020

January 10, 2004

20040110.191020_mk4

Center =84.94+/-0.44 degrees PA (NE quadrant) (red radial line)	Maximum height = 1.25+/-0.01 Rsun
Width (at 1.20 Rsun) = 5.73+/-0.39 degrees latitude (measured between edges -- vertical dashed lines at inflection points)	Width (at 1.22 Rsun) = 4.45+/-0.49 degrees latitude
Cavity depletion, equatorward (1.20 Rsun) = 0.15+/-0.030 (ratio of red to blue dashed line)	Cavity depletion, equatorward (at 1.22 Rsun) = 0.09+/-0.028 (ratio of red to blue dashed line)
Cavity depletion, poleward (1.20 Rsun) = 0.17+/-0.017 (ratio of green to blue dashed line) Minimum intensity in cavity (1.20 Rsun) = 5.5e-07+/-5.9e-09 (Bsun) (blue dashed lines);	Cavity depletion, poleward (1.22 Rsun) = 0.12+/-0.039 (ratio of green to blue dashed line) Minimum intensity in cavity (1.22 Rsun) = 5.5e-07+/-1.1e-08 (Bsun) (blue dashed lines);
Slope at equatorward cavity edge (1.20 Rsun) = 3.5e-08+/-1.1e-08 (Bsun/degree)	Slope at equatorward cavity edge (1.22 Rsun) = 1.7e-08+/-1.1e-08 (Bsun/degree)
Slope at poleward cavity edge (1.20 Rsun) = -4.2e-08+/-1.1e-08 (Bsun/degree)	Slope at poleward cavity edge (1.22 Rsun) = -3.5e-08+/-1.1e-08 (Bsun/degree)

length lower limit = 4 days visible in white light at limb January 8; -9; -10***; -11 (LASCO/EIT CME 1/21);
-- possibly visible at West limb around December 26
Evolution comments = CIRCULAR! filament channel, eventually erupts Jan 21 West limb -- no Mk4 data that day, and channel perp to limb so cavity not visible. Note that when it is at East limb Jan 10 can see twin cavities, at top and bottom of circle

Neutral line orientation at the limb =
CME/dimmings association = CME erupts on West limb Jan 21 2004; prominence eruption on erupts on West limb Jan 21 2004;
Active region association = N/A
Filament/FC association = circular filament; N/A
Other comments: N/A
Filament - only visible in H-alpha or EUV
Necking - bulging neck

Cavity list (e.g. Tables 2 + 3)
Full list of cavity days observed
List of best cavity days (SET 1) observed (e.g. Table 1)
CMEs associated with cavities (e.g. Tables 7 + 8)
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