Anna Surdej

Observing the Sun with micro-interferometric devices: a didactic experiment

Denis Defrère, Olivier Absil, C. Hanot, Pierre Riaud et autres

Measuring the angular diameter of celestial bodies has long been the main purpose of stellar interferometry and was its historical motivation. Nowadays, stellar interferometry is widely used for various other scientific purposes that require very high angular resolution measurements. In terms of …

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Les mirages gravitationnels (III)

Jean Surdej, Anna Surdej

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UBV photometry of the minor planets 86 Semele, 521 Brixia, 53 Kalypso and 113 Amalthea

Jean Surdej, Anna Surdej, B. Louis

peer reviewed

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Spectral variations and evidence for edge and/or line locking mechanism/s/ in the low-excitation planetary nebula HD 138403

Anna Surdej, Jean Surdej, Jean-Pierre Swings

peer reviewed

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Spectral variations and evidence for edge and/or line locking mechanisms in the low-excitation P.N. HD 138403.

Anna Surdej, Jean Surdej, J. P. Swings

The Reflection Nebula Surrounding HD87643

Anna Surdej, Jean Surdej, Jean-Pierre Swings, W. Wamsteker

peer reviewed

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Correlations between line profile and photometric variations in the B2 IV[e] star HD 45677.

Jean-Pierre Swings, R. Barbier, M. Klutz, Anna Surdej et autres

peer reviewed

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Photoelectric lightcurves and rotation period of the minor planet 148 Gallia.

H. Debehogne, Anna Surdej, Jean Surdej

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Photoelectric observations of two unusual asteroids: 1978 CA and 1978 DA.

H. E. Schuster, Anna Surdej, Jean Surdej

peer reviewed

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Period and Spectroscopic Orbit of TU Hor

H. W. Duerbeck, Anna Surdej, Jean Surdej

peer reviewed

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Simultaneous Photometry and Spectroscopy of the B2(e) Variable Star HD 4567

R. Barbier, N. Klutz, Anna Surdej, Jean Surdej et autres

Light variations are observed for HD 45677 in the visible, if they are due to obscuration by circumstellar patchy dust clouds, part of the stellar UV and visible radiations are back-scattered inside the extended atmosphere surrounding the star. The excitation of all …

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Photometric observations of 1978 CA and 1978 DA.

Jean Surdej, Anna Surdej

UBV photometric observations of the earth-crossing asteroid 1978 CA and the Mars-crosser 1978 DA are reported. Light curves are plotted which indicate that 1978 CA has a rotation period of approximately 3 hr 45 min and that 1978 DA rotates about its …

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