193 citations · 1.9k across the 43 of their papers we have counts for
18 papers · 1 filter
A Pathfinder Instrument for Precision Radial Velocities in the Near-Infrared
L. W. Ramsey, J. Barnes, S. L. Redman +5
We have designed and tested an in-plane echelle spectrograph configured to investigate precision radial velocities from ground-based near-infrared observations. The spectrograph op…
A HET search for planets around evolved stars
Andrzej Niedzielski, Alex Wolszczan
We present our ongoing survey of ~1000 GK-giants with the 9.2-m Hobby-Eberly Telescope in search for planets around evolved stars. The stars selected for this survey are brighter t…
A Massive Neutron Star in the Globular Cluster M5
Paulo C. C. Freire, Alex Wolszczan, Maureen van den Berg +1
We report the results of 19 years of Arecibo timing for two pulsars in the globular cluster NGC 5904 (M5), PSR B1516+02A (M5A) and PSR B1516+02B (M5B). This has resulted in the mea…
X-ray emission from the planet pulsar B1257+12
G. G. Pavlov, O. Kargaltsev, G. P. Garmire +1
We report the detection of the millisecond pulsar B1257+12 with the Chandra X-ray Observatory. In a 20 ks exposure we detected 25 photons from the pulsar, with energies between 0.4…
Spitzer/MIPS Limits on Asteroidal Dust in the Pulsar Planetary System PSR B1257+1
G. Bryden, C. A. Beichman, G. H. Rieke +5
With the MIPS camera on Spitzer, we have searched for far-infrared emission from dust in the planetary system orbiting pulsar PSR 1257+12. With accuracies of 0.05 mJy at 24 um and…
Shapiro delay in the PSR J1640+2224 binary system
O. Loehmer, W. Lewandowski, A. Wolszczan +1
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-…
A Search for Cold Dust around Neutron Stars
O. Loehmer, A. Wolszczan, R. Wielebinski
We present observations of nine radio pulsars using the Heinrich-Hertz-Telescope at λ0.87mm and the IRAM 30-m telescope at λ1.2mm in search for a cold dust around these sources. Fi…
Long term stability and dynamical environment of the PSR 1257+12 planetary system
Krzysztof Gozdziewski, Maciej Konacki, Alex Wolszczan
We study the long-term dynamics of the PSR 1257+12 planetary system. Using the recently determined accurate initial condition by Konacki & Wolszczan (2003) who derived the orbital…
Arecibo Timing and Single Pulse Observations of 18 Pulsars
W. Lewandowski, A. Wolszczan, G. Feiler +2
We present new results of timing and single pulse measurements for 18 radio pulsars discovered in 1993 - 1997 by the Penn State/NRL declination-strip survey conducted with the 305-…
Proper motion, age and initial spin period of PSR J0538+2817 in S147
M. Kramer, A. G. Lyne, G. Hobbs +4
We present results of timing observations of the 143-ms pulsar J0538+2817 that provide a proper motion measurement which clearly associates the pulsar with the supernova remnant S1…
Masses and orbital inclinations of planets in the PSR B1257+12 system
Maciej Konacki, Alex Wolszczan
We present measurements of the true masses and orbital inclinations of the two Earth-mass planets in the PSR B1257+12 system, based on the analysis of their mutual gravitational pe…
Studies of the Relativistic Binary Pulsar PSR B1534+12: I. Timing Analysis
I. H. Stairs, S. E. Thorsett, J. H. Taylor +1
We have continued our long term study of the double-neutron-star binary pulsar PSR B1534+12, using new instrumentation to make very high precision measurements at the Arecibo Obser…
Interstellar Scintillation Velocities of a Relativistic Binary PSR B1534+12 and Three Other Millisecond Pulsars
Slavko Bogdanov, Malgorzata Pruszynska, Wojciech Lewandowski +1
We present interstellar scintillation velocity measurements for four millisecond pulsars obtained from long-term monitoring observations with the Arecibo radio telescope at 430 MHz…
Improved timing formula for the PSR B1257+12 planetary system
Maciej Konacki, Andrzej J. Maciejewski, Alex Wolszczan
We present a new analysis of the dynamics of the planetary system around the pulsar B1257+12. A semi-analytical theory of perturbation between terrestrial-mass planets B and C is d…
Frequency decomposition of astrometric signature of planetary systems
Maciej Konacki, Andrzej J. Maciejewski, Alex Wolszczan
We present theoretical analysis of the astrometric searches for extrasolar planets with the Space Interferometry Mission (SIM). Particularly, we derive a model for the future measu…
Resonance in PSR B1257+12 Planetary System
Maciej Konacki, Andrzej J. Maciejewski, Alex Wolszczan
In this paper we present a new method that can be used for analysis of time of arrival of a pulsar pulses (TOAs). It is designated especially to detect quasi-periodic variations of…
Measurement of Relativistic Orbital Decay in the PSR B1534+12 Binary System
I. H. Stairs, Z. Arzoumanian, F. Camilo +5
We have made timing observations of binary pulsar PSR B1534+12 with radio telescopes at Arecibo, Green Bank, and Jodrell Bank. By combining our new observations with data collected…
Pulse Arrival-Times from Binary Pulsars with Rotating Black Hole Companions
Pablo Laguna, Alex Wolszczan
We present a study of the gravitational time delay of arrival of signals from binary pulsar systems with rotating black hole companions. In particular, we investigate the strength…