Publications (48)
Accretion geometry of the neutron star low mass X-ray binary Cyg X-2 from X-ray polarization measurements
R. Farinelli, S. Fabiani, J. Poutanen +92
We report spectro-polarimetric results of an observational campaign of the bright neutron star low-mass X-ray binary Cyg X-2 simultaneously observed by IXPE, NICER and INTEGRAL. Co…
IXPE Observations of the Blazar Mrk 501 in 2022: A Multiwavelength View
L. Lisalda, E. Gau, H. Krawczynski +157
The blazar Markarian 501 (Mrk 501) was observed on three occasions over a 4-month period between 2022 March and 2022 July with the Imaging X-ray Polarimetry Explorer (IXPE). In thi…
Evidence of an Energetic Magnetar Powering 1LHAASO J05004454
J. A. J. Alford, J. D. Gelfand, M. Abdelmaguid +1
We investigate the origin of unidentified, extended TeV source 1LHAASO J05004454, considering three possible origins: cosmic rays interacting with a molecular cloud (MC), partic…
Discovery of TeV Gamma-ray Emission from CTA 1 by VERITAS
E. Aliu, S. Archambault, T. Arlen +88
We report the discovery of TeV gamma-ray emission coincident with the shell-type radio supernova remnant (SNR) CTA 1 using the VERITAS gamma-ray observatory. The source, VER J0006+…
Extended X-ray emission around RRAT J1819-1458
A. Camero-Arranz, N. Rea, M. A. McLaughlin +9
We present new imaging and spectral analysis of the recently discovered extended X-ray emission around the high-magnetic-field rotating radio transient RRAT J1819-1458. We used two…
A new wideband radio polarization observation of the Supernova Remnant G315.42.3
X. Chen, X. Sun, J. F. Kaczmarek +3
The supernova remnant (SNR) G315.42.3 (MSH 1463 or RCW 86) exhibits strong emission across the electromagnetic spectrum. Radio polarization observations probe magnetic fields…
Shockingly Bright Warm Carbon Monoxide Molecular Features in the Supernova Remnant Cassiopeia A Revealed by JWST
J. Rho, S. -H. Park, R. Arendt +36
We present JWST NIRCam (F356W and F444W filters) and MIRI (F770W) images and NIRSpec- IFU spectroscopy of the young supernova remnant Cassiopeia A (Cas A). We obtained the data as…
Investigating the Structure of Vela X
P. Slane, I. Lovchinsky, C. Kolb +9
Vela X is the prototypical example of a pulsar wind nebula whose morphology and detailed structure have been affected by the interaction with the reverse shock of its host supernov…
Dust destruction in non-radiative shocks
H. Zhu, P. Slane, J. Raymond +1
Supernova remnant (SNR) shock waves are the main place where interstellar dust grains are destroyed. However, the dust destruction efficiency in non-radiative shocks is still not w…
X-ray polarimetry of X-ray pulsar X Persei: another orthogonal rotator?
A. A. Mushtukov, S. S. Tsygankov, J. Poutanen +103
X Persei is a persistent low-luminosity X-ray pulsar of period of 835 s in a Be binary system. The field strength at the neutron star surface is not known precisely, but indi…
Precise Localization of the Soft Gamma Repeater SGR 1627-41 and the Anomalous X-ray Pulsar AXP 1E1841-045 with Chandra
S. Wachter, S. Patel, C. Kouveliotou +7
We present precise localizations of AXP 1E1841-045 and SGR 1627-41 with Chandra. We obtained new infrared observations of SGR 1627-41 and reanalyzed archival observations of AXP 1E…
Cosmic Ray Acceleration at the Forward Shock in Tycho's Supernova Remnant: Evidence from Chandra X-ray Observations
J. S. Warren, J. P. Hughes, C. Badenes +7
We present evidence for cosmic ray acceleration at the forward shock in Tycho's supernova remnant (SNR) from three X-ray observables: (1) the proximity of the contact discontinuity…
Searching for the pulsar in G18.95-1.1: Discovery of an X-ray point source and associated synchrotron nebula with Chandra
R. Tuellmann, P. P. Plucinsky, T. J. Gaetz +4
Using the Chandra X-ray Observatory, we have pinpointed the location of a faint X-ray point source (CXOUJ182913.1-125113) and an associated diffuse nebula in the composite supernov…
The extended X-ray emission around RRAT J1819-1458
A. Camero-Arranz, N. Rea, N. Bucciantini +9
We present new imaging and spectral analysis of the recently discovered extended X-ray emission around the high magnetic field rotating radio transient RRAT J1819-1458. We used two…
The geometry of the hot corona in MCG-05-23-16 constrained by X-ray polarimetry
D. Tagliacozzo, A. Marinucci, F. Ursini +105
We report on the second observation of the radio-quiet active galactic nucleus (AGN) MCG-05-23-16 performed with the Imaging X-ray Polarimetry Explorer (IXPE). The observation star…
Gamma-ray observations of Tycho's SNR with VERITAS and Fermi
VERITAS Collaboration, S. Archambault, A. Archer +64
High-energy gamma-ray emission from supernova remnants (SNRs) has provided a unique perspective for studies of Galactic cosmic-ray acceleration. Tycho's SNR is a particularly good…
A CR-hydro-NEI Model of the Structure and Broadband Emission from Tycho's SNR
P. Slane, S. -H. Lee, D. C. Ellison +5
Tycho's supernova remnant (SNR) is well-established as a source of particle acceleration to very high energies. Constraints from numerous studies indicate that the observed gamma-r…
The X-ray polarisation of the Seyfert 1 galaxy IC 4329A
A. Ingram, M. Ewing, A. Marinucci +105
We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy IC 4329A. The Imaging X-ray Polarimetry Explorer (IXPE) observed the source for ~500 ks, supported by…
High Resolution X-ray Observations of the Pulsar Wind Nebula Associated with the Gamma-ray Source HESSJ1640-465
A. Lemiere, P. Slane, B. M. Gaensler +1
We present a Chandra X-ray observation of the very high energy -ray source HESSJ1640-465. We identify a point source surrounded by a diffuse emission that fills the extended…
The Infrared Detection of the Pulsar Wind Nebula in the Galactic Supernova Remnant 3C 58
P. Slane, D. J. Helfand, S. P. Reynolds +3
We present infrared observations of 3C 58 with the Spitzer Space Telescope and the Canada-France-Hawaii Telescope. Using the IRAC camera, we have imaged the entire source resulting…
Magnetic Field Structure of the Crab Pulsar Wind Nebula Revealed with IXPE
T. Mizuno, H. Ohno, E. Watanabe +5
We report a detailed study of the magnetic-field structure of the Crab pulsar wind nebula, using the X-ray polarization data in 2--8~keV obtained with the Imaging X-ray Polarimetry…
IXPE observation confirms a high spin in the accreting black hole 4U 1957+115
L. Marra, M. Brigitte, N. Rodriguez Cavero +113
We present the results of the first X-ray polarimetric observation of the low-mass X-ray binary 4U 1957+115, performed with the Imaging X-ray Polarimetry Explorer in May 2023. The…
X-ray polarimetry and spectroscopy of the neutron star low-mass X-ray binary GX 9+9: an in-depth study with IXPE and NuSTAR
F. Ursini, R. Farinelli, A. Gnarini +101
We report on a comprehensive analysis of simultaneous X-ray polarimetric and spectral data of the bright atoll source GX 9+9 with the Imaging X-ray Polarimetry Explorer (IXPE) and…
Submillimetre observations of RX J1856.5--3754
B. Posselt, K. Schreyer, R. Perna +3
We report on submillimetre bolometer observations of the isolated neutron star RX J1856.5--3754 using the LABOCA bolometer array on the Atacama Pathfinder Experiment (APEX) Telesco…
Nonthermal X-Ray Emission from G266.2-1.2 (RX J0852.0-4622)
P. Slane, J. P. Hughes, R. J. Edgar +3
The newly discovered supernova remnant G266.2-1.2 (RX J0852.0-4622), along the line of sight to the Vela SNR, was observed with ASCA for 120 ks. We find that the X-ray spectrum is…
Discovery of VHE -ray emission from the SNR G54.1+0.3
V. A. Acciari, E. Aliu, T. Arlen +79
We report the discovery of very high energy gamma-ray emission from the direction of the SNR G54.1+0.3 using the VERITAS ground-based gamma-ray observatory. The TeV signal has an o…
Exploring the Small Scale Structure of N103B
K. T. Lewis, D. N. Burrows, J. A. Nousek +3
We present the preliminary results of a 40.8 ks Chandra ACIS observation of the young supernova remnant (SNR) N103B located in the Large Magellanic Cloud. The image reveals structu…
A pulsar-atmosphere model for PSR 0656+14
D. A. Lloyd, R. Perna, P. Slane +2
We present a pulsar-atmosphere (PA) model for modulated thermal X-ray emission from cooling magnetized neutron stars. The model synthesizes the spectral properties of detailed stel…
X-ray Fading and Expansion in the "Miniature Supernova Remnant" of GK Persei
D. Takei, J. J. Drake, H. Yamaguchi +3
We report on a second epoch of Chandra X-ray imaging spectroscopy of the spatially-resolved old nova remnant GK Persei. An ACIS-S3 observation of 97.4 ks was conducted in November…
Fermi Detection of the Pulsar Wind Nebula HESS J1640-465
P. Slane, D. Castro, S. Funk +4
We present observations of HESS J1640-465 with the Fermi-LAT. The source is detected with high confidence as an emitter of high-energy gamma-rays. The spectrum lacks any evidence f…
Discovery of TeV Gamma Ray Emission from Tycho's Supernova Remnant
V. A. Acciari, E. Aliu, T. Arlen +82
We report the discovery of TeV gamma-ray emission from the Type Ia supernova remnant (SNR) G120.1+1.4, known as Tycho's supernova remnant. Observations performed in the period 2008…
Enhanced abundances in three large-diameter mixed-morphology supernova remnants
J. Lazendic, P. Slane
We present an X-ray study of three mixed-morphology supernova remnants (SNRs), HB 21, CTB 1 and HB 3, using archival ASCA and ROSAT data. These data are complemented by archival Ch…
X-ray polarization measurement of the gold standard of radio-quiet active galactic nuclei : NGC 1068
F. Marin, A. Marinucci, M. Laurenti +102
We used the Imaging X-ray Polarimetry Explorer (IXPE) satellite to measure, for the first time, the 2-8 keV polarization of NGC 1068. We pointed IXPE for a net exposure time of 1.1…
Polarization constraints on the X-ray corona in Seyfert Galaxies: MCG-05-23-16
A. Marinucci, F. Muleri, M. DovÄiak +97
We report on the first observation of a radio-quiet Active Galactic Nucleus (AGN) using polarized X-rays: the Seyfert 1.9 galaxy MCG-05-23-16. This source was pointed with the Imag…
Uncovering the geometry of the hot X-ray corona in the Seyfert galaxy NGC4151 with IXPE
V. E. Gianolli, D. E. Kim, S. Bianchi +106
We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy NGC4151. The source has been observed with the Imaging X-ray Polarimetry Explorer (IXPE) for 700 ks,…
A polarized view of the young Pulsar Wind Nebula 3C 58 with IXPE
N. Bucciantini, J. Wong, R. W. Romani +11
Pulsar Wind nebulae (PWNe), are among the most efficient particle accelerators in the Universe, however understanding the physical conditions and the magnetic geometry in their inn…
Supernova Remnants Interacting with Molecular Clouds: X-ray and Gamma-ray Signatures
P. Slane, A. Bykov, D. C. Ellison +2
The giant molecular clouds (MCs) found in the Milky Way and similar galaxies play a crucial role in the evolution of these systems. The supernova explosions that mark the death of…
Galactic Compact Objects Section of the White Paper on the Status and Future of Ground-based TeV Gamma-ray Astronomy
P. Kaaret, A. A. Abdo, J. Arons +22
This is a report on the findings of the Galactic compact objects working group for the white paper on the status and future of TeV gamma-ray astronomy. The white paper is an APS co…
Mapping the circumnuclear regions of the Circinus galaxy with the Imaging X-ray Polarimetry Explorer
F. Ursini, A. Marinucci, G. Matt +94
We report on the Imaging X-ray Polarimetry Explorer (IXPE) observation of the closest and X-ray brightest Compton-thick active galactic nucleus (AGN), the Circinus galaxy. We find…
Inverse Compton X-ray Emission from Supernovae with Compact Progenitors: Application to SN2011fe
R. Margutti, A. M. Soderberg, L. Chomiuk +35
We present a generalized analytic formalism for the inverse Compton X-ray emission from hydrogen-poor supernovae and apply this framework to SN2011fe using Swift-XRT, UVOT and Chan…
VERITAS: Very LArge Energetic Radiation Imaging Telescope Array System
T. C. Weekes, C. Akerlof, S. Biller +37
A next generation atmospheric Cherenkov observatory is described based on the Whipple Observatory -ray telescope. A total of nine such imaging telescopes will be deployed in an…
Infrared imaging and polarimetric observations of the pulsar wind nebula in SNR G21.5-0.9
A. Zajczyk, Y. A. Gallant, P. Slane +6
We present infrared observations of the supernova remnant G21.5-0.9 with the Very Large Telescope, the Canada-France-Hawaii Telescope and the Spitzer Space Telescope. Using the VLT…
X-ray observations of the compact central object in supernova remnant G347.3-0.5
J. Lazendic, P. Slane, B. Gaensler +4
We present Chandra, XMM-Newton and RXTE observations of 1WGA J1713.4-3949, a compact source at the center of the galactic supernova remnant (SNR) G347.3-0.5. The X-ray spectrum of…
The Proper Motion of PSR J0205+6449 in 3C 58
M. F. Bietenholz, V. Kondratiev, S. Ransom +3
We report on sensitive phase-referenced and gated 1.4-GHz VLBI radio observations of the pulsar PSR J0205+6449 in the young pulsar-wind nebula 3C 58, made in 2007 and 2010. We empl…
Section on Supernova remnants and cosmic rays of the White Paper on the Status and Future of Ground-based Gamma-ray Astronomy
M. Pohl, A. Abdo, A. Atoyan +19
This is a report on the findings of the SNR/cosmic-ray working group for the white paper on the status and future of ground-based gamma-ray astronomy. The white paper is an APS com…
An ASCA Study of the High Luminosity SNR G349.7+0.2
P. Slane, Y. Chen, J. S. Lazendic +1
We present ASCA observations of supernova remnant (SNR) G349.7+0.2. The remnant has an irregular shell morphology and is interacting with a molecular cloud, evident from the presen…
The Curious Case of the "Heartworm" Nebula
W. D. Cotton, F. Camilo, W. Becker +9
The curious Galactic features near G357.20.2 were observed with the MeerKAT radio interferometer array in the UHF and L bands (0.56--1.68 GHz). There are two possibly related fe…
Observations of X-rays and Thermal Dust Emission from the Supernova Remnant Kes 75
T. D. Morton, P. Slane, K. J. Borkowski +4
We present Spitzer Space Telescope and Chandra X-ray Observatory observations of the composite Galactic supernova remnant Kes 75 (G29.7-0.3). We use the detected flux at 24 microns…