577 citations · 4.5k across the 78 of their papers we have counts for
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How rapidly do neutron stars spin at birth?
Roberto Soria, Rosalba Perna, David Pooley +1
We have studied the X-ray properties of ageing historical core-collapse supernovae in nearby galaxies, using archival data from Chandra, XMM-Newton and Swift. We found possible evi…
Tools for Dissecting Supernova Remnants Observed with Chandra: Methods and Application to the Galactic Remnant W49B
Laura A. Lopez, Enrico Ramirez-Ruiz, David A. Pooley +1
We introduce methods to quantify the X-ray morphologies of supernova remnants observed with the Chandra X-ray Telescope. These include a power-ratio technique to measure morphologi…
X-ray and optical observations of M55 and NGC 6366: evidence for primordial binaries
C. G. Bassa, D. Pooley, F. Verbunt +3
We present Chandra X-ray Observatory ACIS-S3 X-ray imaging observations and VLT/FORS2 and Hubble Space Telescope optical observations of two low-density Galactic globular clusters;…
The Long-Term Variability of the X-Ray Sources in NGC 6946 and NGC 4485/4490
Joel K. Fridriksson, Jeroen Homan, Walter H. G. Lewin +2
We analyze data from five Chandra observations of the spiral galaxy NGC 6946 and from three Chandra observations of the irregular/spiral interacting galaxy pair NGC 4485/4490, with…
Late-time observations of SN2006gy: Still Going Strong
Nathan Smith, Ryan J. Foley, Joshua S. Bloom +9
Owing to its extremely high luminosity and long duration, SN2006gy radiated more energy in visual light than any other known SN. Two hypotheses to explain its high luminosity -- th…
How rapidly do neutron stars spin at birth? Constraints from archival X-ray observations of extragalactic supernovae
Rosalba Perna, Roberto Soria, Dave Pooley +1
Traditionally, studies aimed at inferring the distribution of birth periods of neutron stars are based on radio surveys. Here we propose an independent method to constrain the puls…
Observational evidence for the origin of X-ray sources in globular clusters
Frank Verbunt, Dave Pooley, Cees Bassa
Low-mass X-ray binaries, recycled pulsars, cataclysmic variables and magnetically active binaries are observed as X-ray sources in globular clusters. We discuss the classification…
Type IIP Supernova SN 2004et: A Multi-Wavelength Study in X-Ray, Optical and Radio
Kuntal Misra, Dave Pooley, Poonam Chandra +4
We present X-ray, broad band optical and low frequency radio observations of the bright type IIP supernova SN 2004et. The \cxo observed the supernova at three epochs, and the optic…
Exciting the Magnetosphere of the Magnetar CXOU J164710.2-455216 in Westerlund 1
M. P. Muno, B. M. Gaensler, J. S. Clark +4
We describe XMM-Newton observations taken 4.3 days prior to and 1.5 days subsequent to two remarkable events that were detected with Swift on 2006 September 21 from the candidate m…
X-Ray, UV, and Optical Observations of Supernova 2006bp with Swift: Detection of Early X-Ray Emission
S. Immler, P. J. Brown, P. Milne +21
We present results on the X-ray and optical/UV emission from the type IIP SN 2006bp and the interaction of the SN shock with its environment, obtained with the X-Ray Telescope (XRT…
SN 2006gy: Discovery of the most luminous supernova ever recorded, powered by the death of an extremely massive star like Eta Carinae
Nathan Smith, Weidong Li, Ryan J. Foley +8
(abridged) We report our discovery and observations of the peculiar Type IIn supernova SN2006gy in NGC1260, revealing that it reached a peak magnitude of -22, making it the most lu…
Faint X-ray Sources in the Globular Cluster Terzan 5
C. O. Heinke, R. Wijnands, H. N. Cohn +4
We report our analysis of a Chandra X-ray observation of the rich globular cluster Terzan 5, in which we detect 50 sources to a limiting 1.0-6 keV X-ray luminosity of 3*10^{31} erg…
X-rays from the Globular Cluster G1: Intermediate Mass Black Hole or Low Mass X-ray Binary?
David Pooley, Saul Rappaport
The globular cluster G1 (Mayall II) in M31 is the most massive (~10^7 M_sun) stellar cluster in the Local Group, and it has the highest central velocity dispersion (~28 km/s). It h…
GRB 050408: An Atypical Gamma-Ray Burst as a Probe of an Atypical Galactic Environment
R. J. Foley, D. A. Perley, D. Pooley +14
The bright GRB 050408 was localized by HETE-II near local midnight, enabling an impressive ground-based followup effort as well as space-based followup from Swift. The Swift data f…
A Chandra X-ray observation of the globular cluster Terzan 1
E. M. Cackett, R. Wijnands, C. O. Heinke +6
We present a 19 ks Chandra ACIS-S observation of the globular cluster Terzan 1. Fourteen sources are detected within 1.4 arcmin of the cluster center with 2 of these sources predic…
A Neutron Star with a Massive Progenitor in Westerlund 1
M. P. Muno, J. S. Clark, P. A. Crowther +9
We report the discovery of an X-ray pulsar in the young, massive Galactic star cluster Westerlund 1. We detected a coherent signal from the brightest X-ray source in the cluster, C…
Closing in on a Short-Hard Burst Progenitor: Constraints from Early-Time Optical Imaging and Spectroscopy of a Possible Host Galaxy of GRB 050509b
J. S. Bloom, J. X. Prochaska, D. Pooley +25
The localization of the short-duration, hard-spectrum GRB 050509b was a watershed event. Thanks to the nearly immediate relay of the GRB position by Swift, we began imaging the GRB…
Late-time X-Ray, UV and Optical Monitoring of Supernova 1979C
Stefan Immler, Robert A. Fesen, Schuyler D. Van Dyk +8
We present results from observations of SN 1979C with XMM-Newton in X-rays and in the UV, archival X-ray and HST data, and follow-up ground-based optical imaging. The XMM-Newton MO…
X-ray variability during the quiescent state of the neutron-star X-ray transient in the globular cluster NGC 6440
Edward M. Cackett, Rudy Wijnands, Craig O. Heinke +6
The globular cluster NGC 6440 is known to harbor a bright neutron-star X-ray transient. We observed the globular cluster with Chandra on two occasions when the bright transient was…
The hard quiescent spectrum of the neutron-star X-ray transient EXO 1745-248 in the globular cluster Terzan 5
Rudy Wijnands, Craig O. Heinke, David Pooley +5
We present a Chandra observation of the globular cluster Terzan 5 during times when the neutron-star X-ray transient EXO 1745-248 located in this cluster was in its quiescent state…
Dynamical Formation of Close Binary Systems in Globular Clusters
D. Pooley, W. H. G. Lewin, S. F. Anderson +11
We know from observations that globular clusters are very efficient catalysts in forming unusual short-period binary systems or their offspring, such as low-mass X-ray binaries (LM…
A dozen colliding wind X-ray binaries in the star cluster R136 in the 30Doradus region
Simon Portegies Zwart, Dave Pooley, Walter Lewin
We analyzed archival Chandra X-ray observations of the central portion of the 30 Doradus region in the Large Magellanic Cloud. The image contains 20 X-ray point sources with lumino…
X-ray, Optical, and Radio Observations of the Type II Supernovae 1999em and 1998S
D. Pooley, W. H. G. Lewin, D. W. Fox +12
Observations of the Type II-P (plateau) Supernova (SN) 1999em and Type IIn (narrow emission line) SN 1998S have enabled estimation of the profile of the SN ejecta, the structure of…