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Simultaneous intensive photometry and high resolution spectroscopy of delta Scuti stars IV. An improved picture of the pulsational behaviour of X Caeli
Luciano Mantegazza, Filippo M. Zerbi, Alberto Sacchi
The delta Scuti star X Caeli has been the target of a simultaneous photometric (14 consecutive nights) and spectroscopic campaign (8 consecutive nigths). From the analysis of light…
Variable stars in nearby galaxies. II. Population I and II Cepheids in Field A of IC 1613
E. Antonello, L. Mantegazza, D. Fugazza +1
The light curves of Cepheids and other variable stars in Field A of IC 1613, obtained with a CCD and no filter ( photometry), have been analyzed. It is possible to separate fir…
Variable stars in nearby galaxies. I. Search for Cepheids in Field A of IC 1613
E. Antonello, L. Mantegazza, D. Fugazza +2
The first results are presented of a four-year program dedicated to the CCD observations of Cepheids in the nearby galaxy IC 1613. Since the program was carried out with a relative…
Optical observations of the black hole candidate XTE J1550-564 during the Sep/Oct 1998 outburst
C. Sanchez-Fernandez, A. J. Castro-Tirado, H. W. Duerbeck +11
We report here optical observations during the September/October 1998 outburst of the black hole candidate XTE J1550-564. CCD photometry was obtained for the optical counterpart wi…
Line profile analysis of the Delta Scuti star HD2724=BB Phe: mode identification and amplitude variations
Luciano Mantegazza, Ennio Poretti
The line profile variations of the Delta Scuti star HD 2724=BB Phe were studied on the basis of new 189 high-resolution spectrograms covering 52 hours of observations on a baseline…