The Radio Sky on Short Timescales with LOFAR: Pulsars and Fast Transients (2009)
Hessels, J. W. T., Stappers, B. W., Van Leeuwen, J.
LOFAR, the "low-frequency array", will be one of the first in a new generation of radio telescopes and Square Kilometer Array (SKA) pathfinders that are highly flexible in capability because they are...
The Observed Spin Distributions of Millisecond Radio and X-ray Pulsars (2009)
We consider the currently observed spin distributions of various types of neutron stars, including isolated and binary radio millisecond pulsars in the Galactic plane and globular cluster system as...
The observed spin distributions of millisecond radio and X-ray pulsars (2009)
We consider the currently observed spin distributions of various types of neutron stars, including isolated and binary radio millisecond pulsars in the Galactic plane and globular cluster system as...
The full spectrum Galactic terrarium: MHz to TeV observations of various critters (2009)
Roberts, M.S.E., Brogan, C., Ransom, S., Lyutikov, M., Oña Wilhelmi, E. De, Djannati-Ataï, A., ...
Multi-wavelength studies at radio, infrared, optical, X-ray, and TeV wavelengths have discovered probable counterparts to many Galactic sources of GeV emission detected by EGRET. These include pulsar...
Low frequency observations of millisecond pulsars with the WSRT (2009)
Stappers, B.W., Karappusamy, R., Hessels, J.W.T.
With LOFAR beginning operation in 2008 there is huge potential for studying pulsars with high signal to noise at low frequencies. We present results of observations made with the Westerbork Synthesis...
Arecibo pulsar survey using ALFA: probing radio pulsar intermittency and transients (2009)
Deneva, J. S., Cordes, J. M., McLaughlin, M. A., Nice, D. J., Lorimer, D. R., Crawford, F., ...
We present radio transient search algorithms, results, and statistics from the ongoing Arecibo Pulsar ALFA (PALFA) survey of the Galactic plane. We have discovered seven objects through a search for...
Arecibo pulsar survey using ALFA: probing radio pulsar intermittency and transients (2009)
Deneva, J. S., Cordes, J. M., McLaughlin, M. A., Nice, D. J., Lorimer, D. R., Crawford, F., ...
We present radio transient search algorithms, results, and statistics from the ongoing Arecibo Pulsar ALFA (PALFA) survey of the Galactic plane. We have discovered seven objects through a search for...
Arecibo Pulsar Survey Using ALFA. III. Probing Radio Pulsar Intermittency and Transients (2008)
Deneva, J. S., Cordes, J. M., McLaughlin, M. A., Nice, D. J., Lorimer, D. R., Crawford, F., ...
We present radio transient search algorithms, results, and statistics from the ongoing Arecibo Pulsar ALFA (PALFA) Survey of the Galactic plane. We have discovered seven objects by detecting isolated...
The Full Spectrum Galactic Terrarium: MHz to TeV Observations of Various Critters (2008)
Roberts, Mallory S. E., Brogan, C., Ransom, S., Lyutikov, M., Wilhelmi, E. De Oña, Djannati-Ataï, A., ...
Multi-wavelength studies at radio, infrared, optical, X-ray, and TeV wavelengths have discovered probable counterparts to many Galactic sources of GeV emission detected by EGRET. These include pulsar...
Chandra X-Ray Observatory Observations of the Globular Cluster M71 (2008)
Elsner, R. F., Heinke, C. O., Cohn, H. N., Lugger, P. M., Maxwell, J. E., Stairs, I. H., ...
We observed the nearby, low-density globular cluster M71 (NGC 6838) with the Chandra X-ray Observatory to study its faint X-ray populations. Five X-ray sources were found inside the cluster core...
Hessels, J. W. T., Nice, D. J., Gaensler, B. M., Kaspi, V. M., Lorimer, D. R., Champion, D. J., ...
We present the discovery of the Vela-like radio pulsar J1856+0245 in the Arecibo PALFA survey. PSR J1856+0245 has a spin period of 81ms, a characteristic age of 21kyr, and a spin-down luminosity Edot...
An Eccentric Binary Millisecond Pulsar in the Galactic Plane (2008)
Champion, D. J., Ransom, S. M., Lazarus, P., Camilo, F., Bassa, C., Kaspi, V. M., ...
Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+0327, a radio pulsar...
Chandra X-ray Observatory observations of the globular cluster M71 (2008)
Elsner, R.F., Heinke, C.O., Cohn, H.N., Lugger, P.M., Maxwell, J.E., Stairs, I.H., ...
We observe the nearby, low-density globular cluster M71 (NGC 6838) with the Chandra X-Ray Observatory to study its faint X-ray populations. Five X-ray sources are found inside the cluster core...
A search for single radio pulses and bursts from southern AXPs (2008)
Crawford, F., Hessels, J.W.T., Kaspi, V.M.
We observed four southern AXPs in 1999 near 1400 MHz with the Parkes 64-m radio telescope to search for periodic radio emission. No Fourier candidates were discovered in the initial analysis, but the...
An eccentric binary millisecond pulsar in the Galactic plane (2008)
Champion, D.J., Ransom, S.M., Lazarus, P., Camilo, F., Bassa, C., Kaspi, V.M., ...
Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+ 0327, a radio pulsar...
The discovery of an eccentric millisecond pulsar in the Galactic plane (2008)
Champion, D.J., Ransom, S.M., Lazarus, P., Camilo, F., Kaspi, V.M., Nice, D.J., ...
The evolution of binary systems is governed by their orbital properties and the stellar density of the local environment. Studies of neutron stars in binary star systems offer unique insights into...
Hessels, J.W.T., Nice, D.J., Gaensler, B.M., Kaspi, V.M., Lorimer, D.R., Champion, D.J., ...
We present the discovery of the Vela-like radio pulsar J1856+0245 in the Arecibo PALFA survey. PSR J1856+0245 has a spin period of 81 ms, a characteristic age of 21 kyr, and a spin-down luminosity...
Eight new millisecond pulsars in NGC 6440 and NGC 6441 (2008)
Freire, P.C.C., Ransom, S.M., Bégin, S., Stairs, I.H., Hessels, J.W.T., Frey, L.H., ...
Motivated by the recent discovery of 30 new millisecond pulsars in Terzan 5, made using the Green Bank Telescope's S-band receiver and the Pulsar Spigot spectrometer, we have set out to use the same...
The GBT350 survey of the Northern Galactic Plane for radio pulsars and transients (2008)
Hessels, J.W.T., Ransom, S.M., Kaspi, V.M., Roberts, M.S.E., Champion, D.J., Stappers, B.W.
Using the Green Bank Telescope (GBT) and Pulsar Spigot at 350 MHz, we have surveyed the Northern Galactic Plane for pulsars and radio transients. This survey covers roughly 1000 square degrees of sky...
A massive neutron star in the globular cluster M5 (2008)
Freire, P.C.C., Wolszczan, A., Berg, M. Van Den, Hessels, J.W.T.
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 measurement of the...
Eight new MSPs in NGC 6440 and NGC 6441 (2008)
Freire, P.C.C., Ransom, S.M., Bégin, S., Stairs, I.H., Hessels, J.W.T., Frey, L.H., ...
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 new pulsars are...
Low Frequency Observations of Millisecond Pulsars with the WSRT (2007)
Stappers, B. W., Karuppusamy, R., Hessels, J. W. T.
With LOFAR beginning operation in 2008 there is huge potential for studying pulsars with high signal to noise at low frequencies. We present results of observations made with the Westerbork Synthesis...
A Search for Single Radio Pulses and Bursts from Southern AXPs (2007)
Crawford, F., Hessels, J. W. T., Kaspi, V. M.
We observed four southern AXPs in 1999 near 1400 MHz with the Parkes 64-m radio telescope to search for periodic radio emission. No Fourier candidates were discovered in the initial analysis, but the...
The GBT350 Survey of the Northern Galactic Plane for Radio Pulsars and Transients (2007)
Hessels, J. W. T., Ransom, S. M., Kaspi, V. M., Roberts, M. S. E., Champion, D. J., Stappers, B. W.
Using the Green Bank Telescope (GBT) and Pulsar Spigot at 350MHz, we have surveyed the Northern Galactic Plane for pulsars and radio transients. This survey covers roughly 1000 square degrees of sky...
Hessels, J. W. T., Stappers, B. W., Rutledge, R. E., Fox, D. B., Shevchuk, A. H.
The ROSAT X-ray source 1RXS J141256.0+792204 has recently been identified as a likely compact object whose properties suggest it could be a very nearby radio millisecond pulsar at d = 80 - 260pc. We...
A 1.4-GHz Arecibo Survey for Pulsars in Globular Clusters (2007)
Hessels, J. W. T., Ransom, S. M., Stairs, I. H., Kaspi, V. M., Freire, P. C. C.
We have surveyed all 22 known Galactic globular clusters observable with the Arecibo radio telescope and within 70kpc of the Sun for radio pulsations at ~1.4GHz. Data were taken with the Wideband...
Hessels, J.W.T., Stappers, B.W.
We have searched for coherent radio pulsations from the new 182- Hz X-ray pulsar SWIFT J1756.9-2508 (ATel #1105, #1107, #1108, #1111, #1114, #1117, #1128) with the Westerbork Synthesis Radio...
Hessels, J.W.T., Stappers, B.W., Rutledge, R.E., Fox, D.B., Shevchuk, A.H.
Context: The ROSAT X-ray source 1RXS J141256.0+792204 has recently been identified as a likely compact object whose properties suggest it could be a very nearby radio millisecond pulsar at d = 80-260...
Deep Searches for Radio Pulsations and Bursts from Four Southern Anomalous X-Ray Pulsars (2007)
Crawford, F., Hessels, J.W.T., Kaspi, V.M.
We have searched for persistent radio pulsations, bright single pulses, and bursts from four southern anomalous X-ray pulsars (AXPs). Deep observations were conducted at 1.4 GHz in 1999 July and...
A Survey of 56 Mid-latitude EGRET Error Boxes for Radio Pulsars (2006)
Crawford, F., Roberts, M. S. E., Hessels, J. W. T., Ransom, S. M., Livingstone, M., Tam, C. R., ...
We have conducted a radio pulsar survey of 56 unidentified gamma-ray sources from the 3rd EGRET catalog which are at intermediate Galactic latitudes (5 deg. < |b| < 73 deg.). For each source, four...
Arecibo and the ALFA Pulsar Survey (2006)
Van Leeuwen, J., Cordes, J. M., Lorimer, D. R., Freire, P. C. C., Camilo, F., Stairs, I. H., ...
The recently started Arecibo L-band Feed Array (ALFA) pulsar survey aims to find ~1000 new pulsars. Due to its high time and frequency resolution the survey is especially sensitive to millisecond...
Arecibo and the ALFA Pulsar Survey (2006)
Leeuwen, J. Van, Cordes, J.M., Lorimer, D.R., Freire, P.C.C., Camilo, F., Stairs, I.H., ...
The recently started Arecibo L-band Feed Array (ALFA) pulsar survey aims to find ¿ 1000 new pulsars. Due to its high time and frequency resolution the survey is especially sensitive to millisecond...
New Pulsars in the Globular Cluster M28 (2006)
Stairs, I.H., Begin, S., Ransom, S.M., Freire, P.C.C., Hessels, J.W.T., Katz, J., ...
We have discovered ten new pulsars in recent observations of the globular cluster M28 (NGC6626) with the Green Bank Telescope. M28 is now the globular cluster with the third largest population of...
Arecibo Pulsar Survey Using ALFA. II. The Young, Highly Relativistic Binary Pulsar J1906+0746 (2006)
Lorimer, D.R., Stairs, I.H., Cordes, J.M., Camilo, F., Faulkner, A.J., ...
We report the discovery of PSR J1906+0746, a young 144 ms pulsar in a highly relativistic 3.98 hr orbit with an eccentricity of 0.085 and expected gravitational wave coalescence time of ~300 Myr. The...
Deep Searches for Radio Pulses and Bursts from AXPs (2006)
Crawford, F., Hessels, J.W.T., Kaspi, V.M.
We report on deep searches for radio emission from four Southern anomalous X-ray pulsars (AXPs). Observations were conducted near 1400 MHz in July and August 1999 with the center beam of the...
The young, highly relativistic binary pulsar J1906+0746 (2005)
Lorimer, D. R., Stairs, I. H., Freire, P. C. C., Cordes, J. M., Camilo, F., Faulkner, A. J., ...
We report the discovery of PSR J1906+0746, a young 144-ms pulsar in a highly relativistic 3.98-hr orbit with an eccentricity of 0.085 and expected gravitational wave coalescence time of 300 Myr. The...
Arecibo Pulsar Survey Using ALFA. I. Survey Strategy and First Discoveries (2005)
Cordes, J. M., Freire, P. C. C., Lorimer, D. R., Camilo, F., Champion, D. J., Nice, D. J., ...
We report results from the initial stage of a long-term pulsar survey of the Galactic plane using the Arecibo L-band Feed Array (ALFA), a seven-beam receiver operating at 1.4 GHz with 0.3 GHz...
Discovery of 10 pulsars in an Arecibo drift-scan survey (2005)
Lorimer, D. R., Xilouris, K. M., Fruchter, A. S., Stairs, I. H., Camilo, F., Vazquez, A. M., ...
We present the results of a 430-MHz survey for pulsars conducted during the upgrade to the 305-m Arecibo radio telescope. Our survey covered a total of 1147 square degrees of sky using a drift-scan...
Observations of PSR J2021+3651 and its X-ray Pulsar Wind Nebula G75.2+0.1 (2004)
Hessels, J. W. T., Roberts, M. S. E., Ransom, S. M., Kaspi, V. M., Romani, R. W., ...
We present results from X-ray and radio observations of the recently discovered young Vela-like pulsar PSR J2021+3651, which is coincident with the EGRET gamma-ray source GeV 2020+3658. A 19.0-ks...
Recent Globular Cluster Searches with Arecibo and the Green Bank Telescope (2002)
Ransom, S. M., Hessels, J. W. T., Stairs, I. H., Kaspi, V. M., Backer, D. C., Greenhill, L. J., ...
We report the discovery of seven new millisecond pulsars during 20 cm searches of 19 globular clusters using the recently upgraded Arecibo Telescope and the new Green Bank Telescope (GBT). Five of...