We have investigated different scenarios for the origin of the binary millisecond pulsar PSR J1911-5958A in NGC6752, the most distant pulsar discovered from the core of a globular cluster to date. The hypothesis that it results from a truly primordial binary born in the halo calls for accretion-induced collapse and negligible recoil speed at the moment of neutron star formation. Scattering or e...

We present a new survey for pulsars in the error boxes of the low-latitude EGRET sources 3EG J1027−5817, 3EG J1800−2338 and 3EG J1810−1032. Although all of these sources have been covered by previous pulsar surveys, the recent discovery of the young, energetic pulsar PSR J1410−6132 at 6.7 GHz has shown that pulsars of this type can be hidden from low frequency surveys. Using an observing freque...

We report the detection of pulsed X-ray emission (4.9σ) from the binary millisecond pulsar PSR J0218+4232 in a 100 ks ROSAT HRI observation. The pulse profile shows a sharp main pulse and an indication for a second weaker pulse at ∼ 0.47 phase separation. The pulsed fraction is 37±13%. PSR J0218+4232 was several times in the field of view of the high-energy γ-ray telescope EGRET and a source po...

The Penalized Signal Regression (PSR) approach to multivariate calibration (MVC) assumes a smooth vector of coefficients for weighting a spectrum to predict the unknown concentration of a chemical component. B-splines and roughness penalties, based on differences, are used to estimate the coefficients. In this paper, we extend PSR to incorporate a covariate like temperature. A smooth surface on...

In this paper we devise and assess a method for optimizing the execution of encapsulated operations (possibly with side-eeects) based on the precomputation of the page answer (i.e., the set of referenced pages). For (important) parameter combinations, (1) the page answer, (2) the reference frequency of pages, (3) and the ordering of the page answer according to the rst reference of a page durin...

We present deep XMM-Newton EPIC spectroscopic and timing X-ray observations of the nearby solitary radio millisecond pulsar, PSR J0030+0451. Its emission spectrum in the 0.1–10 keV range is found to be remarkably similar to that of the nearest and best studied millisecond pulsar, PSR J0437–4715, being well described by a predominantly thermal two-temperature model plus a faint hard tail evident...

In this work I briefly review some of the effects of hyperons on the properties of neutron and proto-neutron stars. In particular, I revise the problem of the strong softening of the EoS, and the consequent reduction of the maximum mass, induced by the presence of hyperons, a puzzle which has become more intringuing and difficult to solve because of the recent measurements of the unusually high...

We report a large spin-up glitch in PSR J1846−0258 which coincided with the onset of magnetar-like behavior on 2006 May 31. We show that the pulsar experienced an unusually large glitch recovery, with a recovery fraction of Q = 5.9 ± 0.3, resulting in a net decrease of the pulse frequency. Such a glitch recovery has never before been observed in a rotation-powered pulsar, however, similar but s...

With medications that improve cognition and advances in knowledge of successful rehabilitative approaches, adults with psychiatric disabilities are increasingly able to pursue desired personal and career goals in their communities. This article focuses on supported education (SEd)-one of the newest psychosocial rehabilitation (PSR) models for adults with mental illness. The mission, principles,...

We present the results of precision timing observations of the binary millisecond pulsar PSR J1640+2224. Combining the pulse arrival time measurements made with the Effelsberg 100-m radio telescope and the Arecibo 305-m radio telescope, we have extended the existing timing model of the pulsar to search for a presence of the effect of a general-relativistic Shapiro delay in the data. At the curr...