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Eight new MSPs in NGC 6440 and NGC 6441
Paulo C. C. Freire, Scott M. Ransom, Steve Begin +4
We report the discovery of five new millisecond pulsars in the globular cluster NGC 6440 and three new ones in NGC 6441; each cluster has one previously known pulsar. Four of the n…
A Deep Chandra Survey of the Globular Cluster 47 Tucanae: Catalog of Point Sources
C. O. Heinke, J. E. Grindlay, P. D. Edmonds +5
We have detected 300 X-ray sources within the half-mass radius (2.79') of the globular cluster 47 Tucanae in a deep (281 ks) Chandra exposure. We perform photometry and simple spec…
Long-term variations in the pulse emission from PSR J0737-3039B
M. Burgay, A. Possenti, R. N. Manchester +12
Analysis of 20 months of observations at the Parkes radio telescope shows secular changes in the pulsed emission from J0737-3039B, the 2.77 s pulsar of the double-pulsar system. Pu…
The Mean Pulse Profile of PSR J0737-3039A
R N Manchester, M Kramer, A Possenti +12
General relativity predicts that the spin axes of the pulsars in the double-pulsar system (PSR J0737-3039A/B) will precess rapidly, in general leading to a change in the observed p…
The Double Pulsar System J0737-3039: Modulation of the radio emission from B by radiation from A
M. A. McLaughlin, M. Kramer, A. G. Lyne +9
We have analyzed single pulses from PSR J0737-3039B, the 2.8-s pulsar in the recently discovered double pulsar system, using data taken with the Green Bank Telescope at 820 and 140…
The double pulsar -- A new testbed for relativistic gravity
M. Kramer, A. G. Lyne, M. Burgay +9
The first ever double pulsar, discovered by our team a few months ago, consists of two pulsars, one with period of 22 ms and the other with a period of 2.7 s. This binary system wi…
A Double-Pulsar System - A Rare Laboratory for Relativistic Gravity and Plasma Physics
A. G. Lyne, M. Burgay, M. Kramer +9
The clock-like properties of pulsars moving in the gravitational fields of their unseen neutron-star companions have allowed unique tests of general relativity and provided evidenc…
Detection of ionized gas in the globular cluster 47 Tucanae
P. C. Freire, M. Kramer, A. G. Lyne +3
We report the detection of ionized intracluster gas in the globular cluster 47 Tucanae. Pulsars in this cluster with a negative period derivative, which must lie in the distant hal…
Timing the millisecond pulsars in 47 Tucanae
P. C. Freire, F. Camilo, D. R. Lorimer +3
In the last 10 years 20 millisecond pulsars have been discovered in the globular cluster 47 Tucanae. Hitherto, only 3 of these had published timing solutions. Here we improve upon…