January 3, 2003



20030103.195654_mk4

Center =147.45+/-0.98 degrees PA (SE quadrant) (red radial line)
Maximum height = 1.73+/-0.08 Rsun
Width (at 1.20 Rsun) = 31.56+/-1.41 degrees latitude (measured between edges -- vertical dashed lines at inflection points)
Width (at 1.46 Rsun) = 27.59+/-0.55 degrees latitude
Cavity depletion, equatorward (1.20 Rsun) = 0.45+/-0.011 (ratio of red to blue dashed line)
Cavity depletion, equatorward (at 1.46 Rsun) = 0.29+/-0.017 (ratio of red to blue dashed line)
Cavity depletion, poleward (1.20 Rsun) = -0.00+/-0.020 (ratio of green to blue dashed line) Minimum intensity in cavity (1.20 Rsun) = 2.8e-07+/-2.8e-09 (Bsun) (blue dashed lines); Position of minimum intensity = 161.78+/-2.51 (blue star)
Cavity depletion, poleward (1.46 Rsun) = 0.00+/-0.035 (ratio of green to blue dashed line) Minimum intensity in cavity (1.46 Rsun) = 9.7e-08+/-1.0e-09 (Bsun) (blue dashed lines); Position of minimum intensity = 162.04+/-0.51 (blue star)
Slope at equatorward cavity edge (1.20 Rsun) = -2.0e-08+/-5.6e-09 (Bsun/degree)
Slope at equatorward cavity edge (1.46 Rsun) = -1.1e-08+/-1.9e-09 (Bsun/degree)
Slope at poleward cavity edge (1.20 Rsun) = -5.9e-09+/-5.6e-09 (Bsun/degree)
Slope at poleward cavity edge (1.46 Rsun) = 2.5e-09+/-1.9e-09 (Bsun/degree)

length lower limit = 5 days visible in white light at limb December 28; -29; -31*** (EIT FIL erupt (1/1)!); January 2; -3;

Visible Dec 2002. Also not shown: ~Jan 23 East limb, March 4-5-6-7-8... West limb
Evolution comments = Again only a small piece of filament visible in H-alpha, but quite high polar cavity visible recurrently for 2-3 months at least. Originally visible Dec 31, then Jan 6-9 West limb, then around Jan 23 East limb (not shown), then West limb Feb 23-24, poss 25, poss a little 26, although obscured. LASCO EIT out Feb 25-26. Possibly affected by filament erupt/CME Feb 28, although this mainly affects long, kinked CF closer to equator. Cavity shows up again nicely at West limb on March 4-5-6-7-8...

Neutral line orientation at the limb =
CME/dimmings association = N/A

Active region association = N/A

Filament/FC association = small prom at limb -- piece of PCF; PCF-S

Other comments: N/A

Filament - -- none visible

Necking - no 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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