5 papers · 1 filter
A multiwavelength investigation of the massive eclipsing binary Cyg OB2 #5
N. Linder, G. Rauw, J. Manfroid +5
The properties of the early-type binary Cyg OB2 #5 have been debated for many years and spectroscopic and photometric investigations yielded conflicting results. We have attempted…
Stellar evolution in real time: Period variations in galactic RR Lyr stars
E. Poretti, J. F. Le Borgne, J. Vandenbroere +6
The times of maximum brightness collected in the GEOS RR Lyr database allowed us to trace the period variations of a sample of 123 galactic RRab variables. These data span a time b…
Stellar evolution through the ages: period variations in galactic RRab stars as derived from the GEOS database and TAROT telescopes
J. F. Le Borgne, A. Paschke, J. Vandenbroere +6
The theory of stellar evolution can be more closely tested if we have the opportunity to measure new quantities. Nowadays, observations of galactic RR Lyr stars are available on a…
Continuous optical monitoring during the prompt emission of GRB 060111B
Alain Klotz, Bruce Gendre, Giulia Stratta +5
We present the time-resolved optical emission of GRB 060111B during its prompt phase, measured with the TAROT robotic observatory. This is the first time that the optical emission…
Early re-brightening of the afterglow of GRB 050525a
A. Klotz, M. Boer, J. L. Atteia +4
We present time resolved optical data acquired by the TAROT automated observatory on the afterglow of GRB 050525a from 6 to 136 minutes after the GRB. We evidence a rapid re-bright…