4 papers
Near-infrared detection and optical follow-up of the GRB990705 afterglow
N. Masetti
Optical and near-infrared observations of the GRB990705 error box were carried out with ESO telescopes at La Silla and Paranal in Chile and with the NOAO SPIREX 0.6-meter telescope…
The rotation speed of the companion star in V395 Car (=2S0921--630)
T. Shahbaz, E. Kuulkers, P. A. Charles +3
We have obtained high resolution optical spectroscopy of the accretion disc corona source 2S0921--630 (=V395 Car) that constrains the spectral type of the companion star to be most…
The quiescence optical light curve of Nova Scorpii 1994 (=GRO J1655-40)
Frank van der Hooft, Martin Heemskerk, Frank Alberts +1
We report on extensive V, R, and i band photometry of the black-hole candidate Nova Sco 1994 (GRO J1655-40) obtained during March 1996, when the source was close to its quiescent p…
1100 Days of BATSE Observations of Cygnus X-1
D. J. Crary, C. Kouveliotou, J. van Paradijs +8
We have examined the power spectral behavior of Cygnus X-1 using approximately 1100 days of BATSE data. These data have been searched for correlations between different power spect…