61 citations · 343 across the 21 of their papers we have counts for
21 papers
An Investigation of Be/X-ray Pulsars with OGLE-III Data
P. C. Schmidtke, A. P. Cowley, A. Udalski
We have studied five seasons of OGLE-III data for eight SMC Be/X-ray pulsars for which no other survey data were available. We have determined orbital periods for four of these bin…
Photometric Variability of Be/X-ray-Pulsar Binaries in the SMC
P. C. Schmidtke, A. P. Cowley
We have studied the photometric variability of ten SMC Be/X-ray pulsars using MACHO and OGLE-II data. For some of these systems we have found periodic behavior, including orbital o…
X-ray Pulsations in the Supersoft X-ray Binary CAL 83
P. C. Schmidtke, A. P. Cowley
X-ray data reveal that the supersoft X-ray binary CAL 83 exhibits 38.4 minute pulsations at some epochs. These X-ray variations are similar to those found in some novae and are lik…
Photometric Periodicities of Be/X-ray Pulsars in the Small Magellanic Cloud
P. C. Schmidtke, A. P. Cowley
Analysis of the longterm photometric variability of 7 Be/X-ray-pulsar systems in the Small Magellanic Cloud has been carried out. We find a variety of types of variability are pres…
FUSE Observations of RX J0513.9-6951
J. B. Hutchings, A. P. Cowley, R. Mann +2
FUSE observations were obtained in July 2003 during 1.2 cycles of the 0.76-day binary orbit of RX J0513.9-6951. Radial velocity measurements of the broad O VI emission profile show…
A Revised Ephemeris and FUSE Observations of the Supersoft X-ray Source CAL 83
P. C. Schmidtke, A. P. Cowley, J. B. Hutchings +2
A new ephemeris has been determined for the supersoft X-ray binary CAL 83 using MACHO photometry. With an improved orbital period of 1.047568 days, it is now possible to phase toge…