161 citations · 1.2k across the 28 of their papers we have counts for
27 papers
Modular Light Sources for Microscopy and Beyond (ModLight)
Graham M Gibson, Robert Archibald, Mark Main +1
Delivering light to an object is one of the key steps in any imaging exercise. Tools such as LEDs and lasers are available to achieve this. These components are integrated into sys…
Network Security Modeling using NetFlow Data: Detecting Botnet attacks in IP Traffic
Ganesh Subramaniam, Huan Chen, Ravi Varadhan +1
Cybersecurity, security monitoring of malicious events in IP traffic, is an important field largely unexplored by statisticians. Computer scientists have made significant contribut…
Two new outbursts and transient hard X-rays from 1E 1048.15937
R. F. Archibald, P. Scholz, V. M. Kaspi +2
Since its discovery, 1E 1048.15937 has been one of the most active magnetars, both in terms of radiative outbursts, and changes to its spin properties. Here we report on a conti…
X-ray timing studies of the low-field magnetar CXOU J164710.2-455216
Hongjun An, Robert Archibald
We report results of X-ray timing analyses for the low-field magnetar CXOU~J164710.2455216 which exhibited multiple outbursts. We use data taken with NICER, NuSTAR, Chandra, and…
The 2016 outburst of PSR J1119-6127: cooling & a spin-down dominated glitch
R. F. Archibald, V. M. Kaspi, S. P. Tendulkar +1
We report on the aftermath of a magnetar outburst from the young, high-magnetic-field radio pulsar PSR J1119-6127 that occurred on 2016 July 27. We present the results of a monitor…
Revival of the magnetar PSR J1622-4950: observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR
F. Camilo, P. Scholz, M. Serylak +205
New radio (MeerKAT and Parkes) and X-ray (XMM-Newton, Swift, Chandra, and NuSTAR) observations of PSR J1622-4950 indicate that the magnetar, in a quiescent state since at least ear…
Magnetar-like X-ray bursts suppress pulsar radio emission
R. F. Archibald, M. Burgay, M. Lyutikov +9
Rotation-powered pulsars and magnetars are two different observational manifestations of neutron stars: rotation powered pulsars are rapidly spinning objects that are mostly observ…
The glitches and rotational history of the highly energetic young pulsar PSR J05376910
Robert D. Ferdman, Robert F. Archibald, Konstantinos N. Gourgouliatos +1
We present a timing and glitch analysis of the young X-ray pulsar PSR J05376910, located within the Large Magellanic Cloud, using 13 years of data from the now decommissioned Ro…
Swift observations of two outbursts from the magnetar 4U 0142+61
R. F. Archibald, V. M. Kaspi, P. Scholz +3
4U 0142+61 is one of a small class of persistently bright magnetars. Here we report on a monitoring campaign of 4U 0142+61 from 2011 July 26 - 2016 June 12 using the Swift X-ray Te…
A Magnetar-like Outburst from a High-B Radio Pulsar
R. F. Archibald, V. M. Kaspi, S. P. Tendulkar +1
Radio pulsars are believed to have their emission powered by the loss of rotational kinetic energy. By contrast, magnetars show intense X-ray and gamma-ray radiation whose luminosi…
A High Braking Index for a Pulsar
R. F. Archibald, E. V. Gotthelf, R. D. Ferdman +8
We present a phase-coherent timing solution for PSR J1640-4631, a young 206 ms pulsar using X-ray timing observations taken with NuSTAR. Over this timing campaign, we have measured…
The NuSTAR view of the non-thermal emission from PSR J0437-4715
Sebastien Guillot, Victoria M. Kaspi, Robert F. Archibald +11
We present a hard X-ray NuSTAR observation of PSR J0437-4715, the nearest millisecond pulsar. The known pulsations at the apparent pulse period ~5.76 ms are detected at energies up…
NuSTAR Observations of Magnetar 1E 1048.1-5937
C. Yang, R. F. Archibald, J. K. Vogel +5
We report on simultaneous NuSTAR and XMM-Newton observations of the magnetar 1E 1048.15937 obtained in July 2013, along with Rossi X-ray Timing Explorer (RXTE) data for the same…
On the braking index of the unusual high-B rotation-powered pulsar PSR J1846-0258
R. F. Archibald, V. M. Kaspi, A. P. Beardmore +2
PSR J1846-0258 is an object which straddles the boundary between magnetars and rotation powered pulsars. Though behaving for many years as a rotation-powered pulsar, in 2006, it ex…
Deep NuSTAR and Swift Monitoring Observations of the Magnetar 1E 1841-045
Hongjun An, Robert F. Archibald, Romain Hascoet +15
We report on a 350-ks NuSTAR observation of the magnetar 1E 1841-045 taken in 2013 September. During the observation, NuSTAR detected six bursts of short duration, with …
Repeated, Delayed Torque Variations Following X-ray Flux Enhancements in the Magnetar 1E1048.15937
R. F. Archibald, V. M. Kaspi, C. -Y. Ng +4
We report on two years of flux and spin evolution monitoring of 1E 1048.15937, a 6.5-s X-ray pulsar identified as a magnetar. Using {\it Swift} XRT data, we observed an X-ray ou…
Green Bank Telescope and Swift X-ray Telescope Observations of the Galactic Center Radio Magnetar SGR J1745-2900
Ryan S. Lynch, Robert F. Archibald, Victoria M. Kaspi +1
We present results from eight months of Green Bank Telescope 8.7-GHz observations and nearly 18 months Swift X-ray telescope observations of the radio magnetar SGR J1745-2900, whic…
NuSTAR Observations of the Magnetar 1E 2259+586
Julia K. Vogel, Romain Hascoet, Victoria M. Kaspi +15
We report on new broad band spectral and temporal observations of the magnetar 1E 2259+586, which is located in the supernova remnant CTB 109. Our data were obtained simultaneously…
NuSTAR observations of X-ray bursts from the magnetar 1E 1048.1-5937
Hongjun An, Victoria M. Kaspi, Andrei M. Beloborodov +13
We report the detection of eight bright X-ray bursts from the 6.5-s magnetar 1E 1048.1-5937, during a 2013 July observation campaign with the Nuclear Spectroscopic Telescope Array…
Timing and Flux Evolution of the Galactic Center Magnetar SGR J1745-2900
V. M. Kaspi, R. F. Archibald, V. Bhalerao +19
We present the X-ray timing and spectral evolution of the Galactic Center magnetar SGR J1745-2900 for the first ~4 months post-discovery using data obtained with the Nuclear Spectr…
NuSTAR results and future plans for magnetar and rotation-powered pulsar observations
Hongjun An, Victoria M. Kaspi, Robert Archibald +27
The Nuclear Spectroscopic Telescope Array (NuSTAR) is the first focusing hard X-ray mission in orbit and operates in the 3-79 keV range. NuSTAR's sensitivity is roughly two orders…
On the X-ray variability of magnetar 1RXS J170849.0-400910
P. Scholz, R. F. Archibald, V. M. Kaspi +4
We present a long-term X-ray flux and spectral analysis for 1RXS J170849.0-400910 using Swift/XRT spanning over 8 years from 2005-2013. We also analyze two observations from Chandr…
NuSTAR observations of magnetar 1E 1841-045
Hongjun An, Romain Hascoet, Victoria M. Kaspi +18
We report new spectral and temporal observations of the magnetar 1E 1841-045 in the Kes 73 supernova remnant obtained with the Nuclear Spectroscopic Telescope Array (NuSTAR). Combi…
An Anti-Glitch in a Magnetar
R. F. Archibald, V. M. Kaspi, C. -Y. Ng +6
Magnetars are neutron stars showing dramatic X-ray and soft -ray outbursting behaviour that is thought to be powered by intense internal magnetic fields. Like conventional young…