UV and X-ray pulse amplitude variability in the transitional millisecond pulsar PSR J1023+0038

The Stochastic X-ray Variability of the Accreting Millisecond Pulsar

In this work I report on the stochastic X-ray variability of the 340 Hz accreting millisecond pulsar MAXI J0911–655. Analyzing pointed observations of the XMM-Newton and NuSTAR observatories I find that the source shows broad band-limited stochastic variability in the 0.01− 10 Hz range, with a total fractional variability of ∼ 24% rms in the 0.4− 3 keV energy band, which increases to ∼ 40% rms ...

Chandra and Rxte Studies of the X-ray/γ-ray Millisecond Pulsar Psr J0218+4232

We report on high-resolution spatial and timing observations of the millisecond pulsar PSR J0218+4232 performed with the Chandra X-ray Observatory (CXO) and the Rossi X-ray Timing Explorer (RXTE). With these observations we were able to study a) the possible spatial extent at X-ray energies of the DC source coincident with PSR J0218+4232 in detail (CXO), b) the relative phasing between the X-ra...

Pulsed X-ray Emission from The Fastest Millisecond Pulsar PSR B1937+21 with ASCA

We have detected pulsed X-ray emission from the fastest millisecond pulsar known, PSR B1937+21 (P =1.558 msec), with ASCA. The pulsar is detected as a point source above ∼ 1.7 keV, with no indication of nebulosity. The source flux in the 2–10 keV band is found to be f = (3.7 ± 0.6) × 10 erg s cm, which implies an isotropic luminosity of Lx = 4πD f ∼ (5.7 ± 1.0) × 10 (D/3.6 kpc) erg s, where D i...

Detection of pulsed X-ray emission from the binary millisecond pulsar PSR J0218+4232

We report the detection of pulsed X-ray emission from the binary millisecond pulsar PSR J0218+4232 in a 100 ks ROSAT HRI observation. The lightcurve deviates from a flat distribution at a ∼ 4.8σ level, showing a sharp main pulse with a duty cycle of ∼ 0.15 (350μs), compatible with smearing due to the scatter in the ROSAT clock calibration. The intrinsic width can be smaller than 100μs. There is...

Discovery of the First Accretion-powered Millisecond X-ray Pulsar