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Limits to the Cas A Ti Line Flux and Constraints on the Ejecta Energy and the Compact Source
R. E. Rothschild, R. E. Lingenfelter
Two long observations of Cas A supernova remnant were made by the \emph{Rossi X-ray Timing Explorer} in 1996 and 1997 to search for hard X-ray line emission at 67.9 and 78.4 keV fr…
Highlights of RXTE Studies of Compact Objects after ~5 Years
H. Bradt, R. Rothschild, J. Swank
Observations with the Rossi X-ray Timing Explorer (RXTE) have led to fundamental progress in the study of compact objects, in particular neutron stars and black holes. In this pape…
X-Ray Observations of XTE J1550-564 During the Decay of the 2000 Outburst - II. Timing
Emrah Kalemci, John A. Tomsick, R. E. Rothschild +2
We investigate the timing behavior of XTE J1550-564 with the Rossi X-ray Timing Explorer (RXTE) as the source made a transition to the hard state during the decay of the 2000 outbu…
RXTE monitoring of Centaurus A
S. Benlloch, R. E. Rothschild, J. Wilms +3
We report on the analysis from ~110 ks of X-ray observations of Centaurus A carried out with the Proportional Counter Array (PCA) and the High Energy X-ray Timing Experiment (HEXTE…
Does Pulsar B1757--24 Have a Fallback Disk?
D. Marsden, R. E. Lingenfelter, R. E. Rothschild
Radio pulsars are thought to spin-down primarily due to torque from magnetic dipole radiation (MDR) emitted by the time-varying stellar magnetic field as the star rotates. This ass…
Structure of the Circumnuclear Region of Seyfert 2 Galaxies Revealed by RXTE Hard X-ray Observations of NGC 4945
G. M. Madejski, P. T. Zycki, C. Done +4
We report the Rossi X-ray Timing Explorer observations of the heavily absorbed Seyfert 2 galaxy NGC 4945, which confirm the large column density of the absorber, corresponding to t…
Magnetic Field Limits on SGRs
R. E. Rothschild, D. Marsden, R. E. Lingenfelter
We measure the period and spin-down rate for SGR 1900+14 during the quiescient period two years before the recent interval of renewed burst activity. We find that the spin-down rat…
Is SGR 1900+14 a Magnetar?
D. Marsden, R. E. Rothschild, R. E. Lingenfelter
We present RXTE observations of the soft gamma--ray repeater SGR 1900+14 taken September 4-18, 1996, nearly 2 years before the 1998 active period of the source. The pulsar period (…
Discovery of a Third Harmonic Cyclotron Resonance Scattering Feature in the X-ray Spectrum of 4U 0115+63
W. A. Heindl, W. Coburn, D. E. Gruber +5
We have discovered a third harmonic cyclotron resonance scattering feature (CRSF) in observations of the recent outburst of 4U 0115+63 with the Rossi X-ray Timing Explorer (RXTE).…
Observation of Cen A by the Rossi X-ray Timing Explorer
R. E. Rothschild, D. L. Band, P. R. Blanco +13
The Rossi X-ray Timing Explorer made a short (10 ks) observation of the radio galaxy Centaurus A on 14 August 1996. Analysis of the combined 2.5-240 keV spectrum has revealed a hea…
Discovery of a New 89 Second X-ray Pulsar XTE J1906+09
D. Marsden, D. E. Gruber, W. A. Heindl +2
We report on the discovery of a new pulsating X-ray source during Rossi X-ray Timing Explorer observations of a low galactic latitude field centered at RA (J2000) = 19 hr 05 m 43 s…
RXTE Absolute Timing Results for the Pulsars B1821-24 and B1509-58
A. H. Rots, K. Jahoda, D. J. Macomb +9
Observations with the Rossi X-ray Timing Explorer and the Jodrell Bank, Parkes, and Green Bank telescopes have enabled us to determine the time delay between radio and X-ray pulses…
HEXTE Observations of SGR 1806-20 During Outburst
D. Marsden, R. E. Rothschild, C. Kouveliotou +2
We discuss observations of the soft gamma repeater SGR 1806-20 during the RXTE Target of Opportunity observations made in November 1996. During the ~50 ksec RXTE observation, HEXTE…
The X-ray Spectrum of the Plerionic System PSR B1509-58/MSH 15-52
D. Marsden, P. R. Blanco, D. E. Gruber +7
We present the results of observations of the PSR B150958/MSH 1552 system in X-rays ( keV) by the Rossi X-ray Timing Explorer. The spectra of the peak of the pulsed co…
X-ray Variability of Cygnus X-1 In Its Soft State
W. Cui, S. N. Zhang, K. Jahoda +4
We reported previously that for Cyg X-1 there is a settling period following the transition from hard to soft state (astro-ph/9610071). During the transiton, The low energy spectru…