20000315.172302

March 15, 2000

20000315.172302_mk4

Center =205.73+/-0.50 degrees PA (SW quadrant) (red radial line)	Maximum height = 1.43+/-0.01 Rsun
Width (at 1.20 Rsun) = 11.87+/-0.54 degrees latitude (measured between edges -- vertical dashed lines at inflection points)	Width (at 1.31 Rsun) = 10.32+/-0.47 degrees latitude
Cavity depletion, equatorward (1.20 Rsun) = 0.14+/-0.017 (ratio of red to blue dashed line)	Cavity depletion, equatorward (at 1.31 Rsun) = 0.07+/-0.019 (ratio of red to blue dashed line)
Cavity depletion, poleward (1.20 Rsun) = 0.24+/-0.015 (ratio of green to blue dashed line) Minimum intensity in cavity (1.20 Rsun) = 3.6e-07+/-3.6e-09 (Bsun) (blue dashed lines);	Cavity depletion, poleward (1.31 Rsun) = 0.04+/-0.019 (ratio of green to blue dashed line) Minimum intensity in cavity (1.31 Rsun) = 2.1e-07+/-2.1e-09 (Bsun) (blue dashed lines);
Slope at equatorward cavity edge (1.20 Rsun) = 2.0e-08+/-7.1e-09 (Bsun/degree)	Slope at equatorward cavity edge (1.31 Rsun) = 6.5e-09+/-4.2e-09 (Bsun/degree)
Slope at poleward cavity edge (1.20 Rsun) = -1.9e-08+/-7.1e-09 (Bsun/degree)	Slope at poleward cavity edge (1.31 Rsun) = 4.6e-09+/-4.2e-09 (Bsun/degree)

length lower limit = 1 days visible in white light at limb March 15**;
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 March 3 (also Feb 5); prominence eruption on March 3;
Active region association = N/A
Filament/FC association = PCF-S; polar crown filament
Other comments: N/A
Filament - visible in white light
Necking - straight up and down 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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