20000205.190608

February 5, 2000

20000205.190608_mk4

Center =149.27+/-0.97 degrees PA (SE quadrant) (red radial line)	Maximum height = 1.42+/-0.03 Rsun
Width (at 1.20 Rsun) = 17.48+/-1.38 degrees latitude (measured between edges -- vertical dashed lines at inflection points)	Width (at 1.31 Rsun) = 12.77+/-0.57 degrees latitude
Cavity depletion, equatorward (1.20 Rsun) = 0.37+/-0.016 (ratio of red to blue dashed line)	Cavity depletion, equatorward (at 1.31 Rsun) = 0.41+/-0.012 (ratio of red to blue dashed line)
Cavity depletion, poleward (1.20 Rsun) = 0.16+/-0.022 (ratio of green to blue dashed line) Minimum intensity in cavity (1.20 Rsun) = 3.4e-07+/-5.4e-09 (Bsun) (blue dashed lines);	Cavity depletion, poleward (1.31 Rsun) = 0.13+/-0.025 (ratio of green to blue dashed line) Minimum intensity in cavity (1.31 Rsun) = 2.0e-07+/-2.0e-09 (Bsun) (blue dashed lines);
Slope at equatorward cavity edge (1.20 Rsun) = -3.3e-08+/-6.8e-09 (Bsun/degree)	Slope at equatorward cavity edge (1.31 Rsun) = -8.3e-09+/-3.9e-09 (Bsun/degree)
Slope at poleward cavity edge (1.20 Rsun) = 1.1e-08+/-6.8e-09 (Bsun/degree)	Slope at poleward cavity edge (1.31 Rsun) = 4.2e-09+/-3.9e-09 (Bsun/degree)

length lower limit = 3 days visible in white light at limb February 3; -4; -5 (CME!);
Recurrence =East limb February 3; -4; -5 (CME!); East limb March 2; -3 (CME!); West limb March 15; East limb March 30 ; West limb April 13**; Also visible Sep-Dec 1999
Evolution comments = PCF-S -- same as Sept-Dec 99, but cavity over different portion. Visible both limbs at times. Also visible March 14,16... West limb -- many other days. Possible eruption April 15 -- but no Mk4 data -- and may be too far from pole. System probably exist longer than shown here. At least two Mk4 eruptions, Feb 5 and Mar 3 (orig CME cases).

Neutral line orientation at the limb =
CME/dimmings association = CME Feb 5 (also March 3);
Active region association = N/A
Filament/FC association = PCF-S; polar crown filament
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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