Fe XIV emission on/off line animation

This animation illustrates that even though the filter used for Fe XIV emission photography was of 0.15 nm bandwidth, the contamination of the image by continuum is still very high. Both images (530.2 nm on-line, 529.1 nm off-line) are in logarithm brightness scala and without any structure enhancement. The images were precisely calibrated, therefore any change in brightness you see in the animation is caused by a change of radiation intensity and not by difference of brightness scala. The change of brightness is only minor in polar regions where the Fe XIV emission is very weak. A strong Fe XIV emission is clearly visible in active regions as a significant brightness change.

Date22. 07. 2009
Time2nd contact 03:28:39 UT, 3rd contact 03:34:20 UT
Total eclipse duration 5 m 41 s
PlaceEnewetak Atoll, Marshall Islands
Coordinate11° 21.546' N, 162° 20.827' E, 3 m altitude
ConditionsPartially clear, partially small cumulus cloud,
altitude of the Sun above the horizon 56-57°
Opticson-line: Beroflex 8/500mm, 530.2nm filter, bandwidth 0.15nm (Andover Corp. USA)
off-line: Exakta 8/500mm, 529.1nm filter, bandwidth 0.15nm (Andover Corp. USA)
Cameratwo Canon EOS 5D cameras
Exposure2 s (ISO 100) - 30 s (ISO 400)
Processing16 on-line and 16 off-line eclipse images used. Eclipse images calibrated by means of dark frames and flat-fields, aligned by means of phase correlation, composed by means of LDIC 5.0 software. Final processing was done using ACC 6.1 software.
Image processing by Miloslav Druckmüller
SoftwareAstro D3F 2.0, PhaseCorr 6.0, MPA 1.0, LDIC 5.0, Sofo ACC 6.1
OrientationImage must be rotated 8.6° clockwise to achieve standard orientation i. e. North up.
Copyright© 2009 Miloslav Druckmüller, Peter Aniol, Vojtech Rušin, Ľubomír Klocok, Karel Martišek, Martin Dietzel

Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
Page last update: 9.10.2009