38 citations · 90 across the 7 of their papers we have counts for
7 papers
Transient behavior of three SU UMa-type dwarf novae; AR Pic, QW Ser and V521 Peg
Hélène Szegedi, Philip A. Charles, Pieter J. Meintjes +1
Changes in the supercycle lengths of some SU UMa-type dwarf novae have been detected by other studies, and indicate that the mass transfer rates noticeably decrease over time. We i…
Prolonged sub-luminous state of the new transitional pulsar candidate CXOU J110926.4-650224
Francesco Coti Zelati, Alessandro Papitto, Domitilla de Martino +12
We report on a multi-wavelength study of the unclassified X-ray source CXOU J110926.4-650224 (J1109). We identified the optical counterpart as a blue star with a magnitude of $\sim…
Optical observations of "hot" novae returning to quiescence
P. Zemko, S. Ciroi, M. Orio +10
We have monitored the return to quiescence of novae previously observed in outburst as supersoft X-ray sources, with optical photometry of the intermediate polar (IP) V4743 Sgr and…
CXO J004318.8+412016, a steady supersoft X-ray source in M 31
M. Orio, G. J. M. Luna, R. Kotulla +14
We obtained an optical spectrum of a star we identify as the optical counterpart of the M31 Chandra source CXO J004318.8+412016, because of prominent emission lines of the Balmer s…
An eLIMA model for the 67 s X-ray periodicity in CAL 83
A. Odendaal, P. J. Meintjes
Supersoft X-ray sources (SSSs) are characterized by their low effective temperatures and high X-ray luminosities. The soft X-ray emission can be explained by hydrogen nuclear burni…
Optical spectroscopy of PSR B1259-63/LS 2883 during the 2014 periastron passage with the Southern African Large Telescope
B. van Soelen, P. Väisänen, A. Odendaal +3
The gamma-ray binary system PSR B1259-63/LS 2883 went through periastron in May 2014. We report on the optical spectroscopic monitoring of the system from 33 d before to 78 d after…
Optical and X-ray Properties of CAL 83: I. Quasi-periodic Optical and Supersoft Variability
A. F. Rajoelimanana, P. A. Charles, P. J. Meintjes +2
We have studied the long-term (~ years) temporal variability of the prototype supersoft X-ray source (SSS) CAL 83 in the LMC, using data from the MACHO and OGLE projects. The CAL 8…