Search Results - "Wyk, F. van"

UBV(RI)C JHK observations of Hipparcos-selected nearby stars by Koen, C., Kilkenny, D., van Wyk, F., Marang, F.

“…We present homogeneous, standardized UBV(RI)C photometry for over 700 nearby stars selected on the basis of Hipparcos parallaxes. Additionally, we list JHK…”
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New changing look case in NGC 1566 by Oknyansky, V L, Winkler, H, Tsygankov, S S, Lipunov, V M, Gorbovskoy, E S, van Wyk, F, Buckley, D A H, Tyurina, N V

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Further observations of Hipparcos red stars and standards for UBV(RI)C photometry by Kilkenny, D., Koen, C., Van Wyk, F., Marang, F., Cooper, D.

“…We present homogeneous and standardized UBV(RI)CJHK photometry for over 100 M stars selected from an earlier paper on the basis of apparent photometric…”
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On the nature of the upper atmospheric variability in the rapidly oscillating Ap star HD 134214 by Kurtz, D. W., Elkin, V. G., Mathys, G., Van Wyk, F.

“…Recently, we discovered an entirely new type of variability in the upper atmospheres of rapidly oscillating Ap (roAp) stars. This manifests itself in amplitude…”
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The post-maximum behaviour of the changing-look Seyfert galaxy NGC 1566 by Oknyansky, V L, Winkler, H, Tsygankov, S S, Lipunov, V M, Gorbovskoy, E S, van Wyk, F, Buckley, D A H, Jiang, B W, Tyurina, N V

“…ABSTRACT We present results of the long-term multiwavelength study of optical, UV, and X-ray variability of the nearby changing-look (CL) Seyfert NGC 1566…”
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The discovery of rapid oscillations in the magnetic Ap stars HD 69013 and HD 96237 by Elkin, V. G., Kurtz, D. W., Worters, H. L., Mathys, G., Smalley, B., van Wyk, F., Smith, A. M. S.

“…We report the detection of short-period variations in the stars HD 69013 and HD 96237. These stars possess large overabundances of rare earth elements and…”
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THE UBV(RI)C COLORS OF THE SUN by RAMIREZ, I, MICHEL, R, SEFAKO, R, MAIA, M. Tucci, SCHUSTER, W. J, VAN WYK, F, MELENDEZ, J, CASAGRANDE, L, CASTILHO, B. V

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HR 7920: a very bright new Delta Scuti star with possible Gamma Doradus variations by Koen, C, van Wyk, F, Laney, C D, Kilkenny, D

“…We present photometric and high-dispersion spectroscopic measurements that show HR 7920 is a periodic variable. The photometry reveals at least four…”
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Do all epistaxis patients with a nasal pack need admission? A retrospective study of 116 patients managed in accident and emergency according to a peer reviewed protocol by Van Wyk, F C, Massey, S, Worley, G, Brady, S

“…Epistaxis is the most common nasal emergency and if nasal packing is required this commonly results in admission. A literature search could find no published…”
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Period changes in the pulsating extreme helium stars V652 Her and BX Cir by Kilkenny, D., Crause, L. A., van Wyk, F.

“…Thirty-four new timings of maxima of the radially pulsating extreme helium (EHe) star V652 Her (= BD+13° 3224) obtained during 1996–2004 are reported. The…”
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A photometric and spectroscopic study of the hottest pulsating extreme helium star, V2076 Oph (HD 160641) by Wright, D. J., Lynas-Gray, A. E., Kilkenny, D., Cottrell, P. L., Shobbrook, R. R., Koen, C., Van Wyk, F. W., Kilmartin, P. M., Martinez, P., Gilmore, A. C.

“…We present results from a three-site photometric and high-resolution spectroscopic campaign on the hottest known extreme helium star V2076 Oph (HD 160641). A…”
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Is there a difference in quality of life, comparing summer and winter, in patients who have undergone total laryngectomy? by Van Wyk, F C, Vaz, F, Harries, M, Weighill, J

“…Several studies have implied that patients' quality of life stabilises six months after undergoing total laryngectomy. However, these studies may well have…”
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The EC 14026 stars — X. A multi-site campaign on the sdBV star PG 1605+072 by Kilkenny, D., Koen, C., O'Donoghue, D., Wyk, F. van, Larson, K. A., Shobbrook, R., Sullivan, D. J., Burleigh, M. R., Dobbie, P. D., Kawaler, S. D.

“…Results are reported from a multi-site photometric campaign on PG 1605+072, a member of the recently discovered class of pulsating hot subdwarfs, or EC 14026…”
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First science with the Southern African Large Telescope: peering at the accreting polar caps of the eclipsing polar SDSS J015543.40+002807.2 by O'Donoghue, D., Buckley, D. A. H., Balona, L. A., Bester, D., Botha, L., Brink, J., Carter, D. B., Charles, P. A., Christians, A., Ebrahim, F., Emmerich, R., Esterhuyse, W., Evans, G. P., Fourie, C., Fourie, P., Gajjar, H., Gordon, M., Gumede, C., De Kock, M., Koeslag, A., Koorts, W. P., Kriel, H., Marang, F., Meiring, J. G., Menzies, J. W., Menzies, P., Metcalfe, D., Meyer, B., Nel, L., O'Connor, J., Osman, F., Du Plessis, C., Rall, H., Riddick, A., Romero-Colmenero, E., Potter, S. B., Sass, C., Schalekamp, H., Sessions, N., Siyengo, S., Sopela, V., Steyn, H., Stoffels, J., Scholtz, J., Swart, G., Swat, A., Swiegers, J., Tiheli, T., Vaisanen, P., Whittaker, W., Van Wyk, F.

“…We describe briefly the properties of the recently completed Southern African Large Telescope (SALT), along with its first light imager SALTICAM. Using this…”
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Lower Lateral Cartilages: An Anatomic and Morphological Study in Noses of Black Southern Africans by McIntosh, Cameron N D, van Wyk, F Carl, Joubert, Gina, Seedat, Riaz Y

“…The anatomy of the nose of different ethnic groups has been widely researched in order to facilitate a better understanding of the individual nose as a…”
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A search for previously unrecognized metal-poor subdwarfs in the Hipparcos astrometric catalogue by Reid, I. Neill, van Wyk, F., Marang, F., Roberts, G., Kilkenny, D., Mahoney, S.

“…We have identified 317 stars included in the Hipparcos astrometric catalogue that have parallaxes measured to a precision of better than 15 per cent, and the…”
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Frequency variability in the rapidly oscillating Ap star HR 3831: three more years of monitoring by Kurtz, D. W., van Wyk, F., Roberts, G., Marang, F., Handler, G., Medupe, R., Kilkenny, D.

“…We present 147 h of high-speed photometric observations of HR 3831 obtained on 125 nights in 1993, 1994, 1995 and 1996. In an ongoing programme, we monitor the…”
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Asteroseismology of Hybrid Pulsators Made Possible: Simultaneous MOST Space Photometry and Ground-Based Spectroscopy of γ Peg by Handler, G, Matthews, J. M, Eaton, J. A, Daszyńska-Daszkiewicz, J, Kuschnig, R, Lehmann, H, Rodríguez, E, Pamyatnykh, A. A, Zdravkov, T, Lenz, P, Costa, V, Díaz-Fraile, D, Sota, A, Kwiatkowski, T, Schwarzenberg-Czerny, A, Borczyk, W, Dimitrov, W, Fagas, M, Kamiński, K, Rożek, A, van Wyk, F, Pollard, K. R, Kilmartin, P. M, Weiss, W. W, Guenther, D. B, Moffat, A. F. J, Rucinski, S. M, Sasselov, D. D, Walker, G. A. H

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Asteroseismic analysis of the roAp star α Circini: 84 d of high-precision photometry from the WIRE satellite by Bruntt, H., Kurtz, D. W., Cunha, M. S., Brandão, I. M., Handler, G., Bedding, T. R., Medupe, T., Buzasi, D. L., Mashigo, D., Zhang, I., Van Wyk, F.

“…We present a detailed study of the pulsation of α Circini, the brightest of the rapidly oscillating Ap stars. We have obtained 84 d of high-precision…”
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DISCOVERY OF MORE CHANGING LOOK EVENTS IN NGC 1566 by Oknyansky, V. L., Winkler, H., Tsygankov, S. S., Lipunov, V. M., Gorbovskoy, E. S., Van Wyk, F., Buckley, D.A. H., Tyurina, N. V.

“…We summarize a study of optical, UV and X-ray light curves of the nearby changing look active galactic nucleus in the galaxy NGC 1566 obtained with the Neil…”
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