We present a total of 48 minutes of observations of the nearby, bright millisecond pulsar PSR J0437[4715 taken at the Parkes Observatory in Australia. The data were obtained at a central radio frequency of 1380 MHz using a high-speed tape recorder that permitted coherent Nyquist sampling of 50 MHz of bandwidth in each of two polarizations. Using the high time resolution available from this volt...

While observations of many high-precision radio pulsars order $\lesssim1~\mu$s across the sky are needed for detection and characterization a stochastic background low-frequency gravitational waves (GWs), sensitivity to single sources GWs requires even higher timing precision. The Argentine Institute Radio Astronomy (IAR; Instituto Argentino de Radioastronom\'ia) has begun brightest-known milli...

This thesis reports on the recent results of a continuing, high-precision pulsar timing project, currently focused on the nearby, binary millisecond pulsar, PSR J0437−4715. Pulse arrival time analysis has yielded a remarkable series of constraints on the physical parameters of this system and evidence for the distortion of space-time as predicted by the General Theory of Relativity. Owing to th...

The instability in one of the components of the radio integrated profile (IP) of the millisecond pulsar PSR J0437−4715 is correlated with the occurrence of the spiky emission in that component. It is speculated that the instability in other components is also due to the spiky emission. This might have important implications for interpreting the individual components of the IP as independent bea...

We present spectra of pulsed gamma-ray emission expected from millisecond pulsars within the framework of polar-cap models. The spectra are a superposition of three components due to curvature (CR), synchrotron (SR), and Compton upscattering (ICS) processes. The CR component dominates below 100GeV and the ICS component exhibits a peak at∼ 1TeV. The CR component should be observable from J0437-4...

Guava is one of the most important commercial fruit crop in Bangladesh due to its high nutrient value, good taste and high health benefits. This study was conducted to investigate the flowering, fruiting behavior and nutritional quality of guava genotype suitable for coastal region of Bangladesh. Fifteen genotypes (PG 01 to PG 15) having satisfactory growth were selected for this study. One bra...

Aims. We studied the turbulence spectrum of the local interstellar plasma in the direction of PSR J0437−4715, on the basis of our observations and those reported earlier by others. Methods. We combine these data to form a structure function for the variations of phase along the line of sight to the pulsar. For observations that did not report them, we infer modulation indices from a theoretical...