D. A. H. Buckley
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View article: What determines the γ-ray luminosities of classical novae?
What determines the γ-ray luminosities of classical novae? Open
Classical novae in the Milky Way have now been well-established as high-energy GeV γ-ray sources. In novae with main-sequence companions, this emission is believed to result from shocks internal to the nova ejecta, as a later fast wind col…
View article: OPTICAM reveals hints of cyclotron emission from the intermediate polar V709 Cas
OPTICAM reveals hints of cyclotron emission from the intermediate polar V709 Cas Open
Magnetic cataclysmic variables of the intermediate polar (IP) subclass display a wide range of variability across different wavelengths. In late 2024 October/early November, the IP V709 Cas was observed over 10 nights by the OPtical TIming…
View article: The PRime-focus Infrared Microlensing Experiment (PRIME): First Results
The PRime-focus Infrared Microlensing Experiment (PRIME): First Results Open
We present the description of the instruments and the first results of the PRime-focus Infrared Microlensing Experiment (PRIME). PRIME is the first dedicated near-infrared (NIR) microlensing survey telescope, and is located at the South Af…
View article: <i>TESS</i> and ground-based observations of WZ Sge-type dwarf novae in outburst
<i>TESS</i> and ground-based observations of WZ Sge-type dwarf novae in outburst Open
Dwarf nova (DN) superoutbursts are accompanied by superhumps, which change their periods and profiles over a superoutburst. We present the TESS and ground-based observations of nine WZ Sge-type DNe and candidates in superoutburst. In TCP J…
View article: Discovering Cataclysmic Variables from the Rubin Observatory LSST
Discovering Cataclysmic Variables from the Rubin Observatory LSST Open
The Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) will provide a windfall of new transients and variable sources. Here we have performed mock observation simulations to understand LSST’s expected detection rates for ca…
View article: Detection of spin-modulated circular polarization and radial velocity variations in the long-period Intermediate Polar 1RXS J080114.6–462324
Detection of spin-modulated circular polarization and radial velocity variations in the long-period Intermediate Polar 1RXS J080114.6–462324 Open
We present a comprehensive photometric, spectroscopic, and polarimetric study of the intermediate polar (IP) 1RXS J080114.6–462324, using observations from the South African Astronomical Observatory 1.0m and 1.9m telescopes and the Souther…
View article: Phase-resolved spectroscopic observations of the magnetic cataclysmic binary EF Eridani: revealing complex magnetic accretion during a high state
Phase-resolved spectroscopic observations of the magnetic cataclysmic binary EF Eridani: revealing complex magnetic accretion during a high state Open
We present high-resolution, phase-resolved spectroscopic observations of the polar EF Eri, obtained with SALT and the SAAO 1.9-m telescope during its recent emergence from a three-decade-long low state. The average spectrum shows strong em…
View article: Phase-resolved spectroscopic observations of the magnetic cataclysmic binary EF Eridani: Revealing complex magnetic accretion during a high state
Phase-resolved spectroscopic observations of the magnetic cataclysmic binary EF Eridani: Revealing complex magnetic accretion during a high state Open
We present high-resolution, phase-resolved spectroscopic observations of the polar EF Eri, obtained with SALT and the SAAO 1.9-m telescope during its recent emergence from a three-decade-long low state. The average spectrum shows strong em…
View article: Infrared Synchrotron Emission in the Soft State of GX 339-4 and the Mid-Infrared/X-ray Luminosity Plane of Black Hole X-ray Binaries
Infrared Synchrotron Emission in the Soft State of GX 339-4 and the Mid-Infrared/X-ray Luminosity Plane of Black Hole X-ray Binaries Open
Progress in understanding the growth of accreting black holes remains hampered by a lack of sensitive coordinated multiwavelength observations. In particular, the mid-infrared (MIR) regime remains ill-explored except for jet-dominant state…
View article: A Sibling of AR Scorpii: SDSS J230641.47+244055.8 and the Observational Blueprint of White Dwarf Pulsars
A Sibling of AR Scorpii: SDSS J230641.47+244055.8 and the Observational Blueprint of White Dwarf Pulsars Open
Radio pulsating white dwarf (WD) systems, known as WD pulsars, are binary systems where the rapidly spinning WD interacts with a low-mass companion, producing pulsed non-thermal emission observed across the entire electromagnetic spectrum.…
View article: Discovering Cataclysmic Variables from the Rubin Observatory LSST
Discovering Cataclysmic Variables from the Rubin Observatory LSST Open
The Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) will provide a windfall of new transients and variable sources. Here we have performed mock observation simulations to understand LSST's expected detection rates for ca…
View article: Multiwavelength study of extreme variability in LEDA 1154204: A changing-look event in a type 1.9 Seyfert
Multiwavelength study of extreme variability in LEDA 1154204: A changing-look event in a type 1.9 Seyfert Open
Context. Multiwavelength studies of transients in actively accreting supermassive black holes have revealed that large-amplitude variability is frequently linked to significant changes in the optical spectra. This phenomenon is known as a …
View article: The Prime Focus Infrared Microlensing Experiment (PRIME): First Results
The Prime Focus Infrared Microlensing Experiment (PRIME): First Results Open
We present the description of the instruments and the first results of the PRime-focus Infrared Microlensing Experiment (PRIME). PRIME is the first dedicated near-infrared (NIR) microlensing survey telescope located at the South African As…
View article: A new way to find symbiotic stars: accretion disc detection with continuum survey photometry
A new way to find symbiotic stars: accretion disc detection with continuum survey photometry Open
Symbiotic stars are binaries in which a cool and evolved star of luminosity class I–III accretes onto a smaller companion. However, direct accretion signatures like disc flickering and boundary layer X-rays are typically outshone or suppre…
View article: A new Bowen fluorescence flare and extreme coronal line emitter discovered by SRG/eROSITA
A new Bowen fluorescence flare and extreme coronal line emitter discovered by SRG/eROSITA Open
The nuclear X-ray transient eRASSt J012026.5-292727 (J012026 hereafter) was discovered in the second SRG/eROSITA all-sky survey (eRASS2). The source appeared more than one order of magnitude brighter than the eRASS1 upper limits (peak eRAS…
View article: ASKAP J144834−685644: a newly discovered long period radio transient detected from radio to X-rays
ASKAP J144834−685644: a newly discovered long period radio transient detected from radio to X-rays Open
Long-period radio transients (LPTs) are an emerging group of radio transients that show periodic polarized radio bursts with periods varying from a few minutes to a few hours. Fewer than a dozen LPTs have been detected so far, and their or…
View article: A low mass, binary-stripped envelope for the Type IIb SN 2024abfo
A low mass, binary-stripped envelope for the Type IIb SN 2024abfo Open
Type IIb supernovae (SNe) are a transitional subclass of stripped-envelope SNe showing hydrogen lines in their spectra that gradually weaken and give way to helium lines reminiscent of SNe Ib, which is indicative of stripping through stell…
View article: Does paternal alcohol consumption affect the severity of traits of fetal alcohol spectrum disorders?
Does paternal alcohol consumption affect the severity of traits of fetal alcohol spectrum disorders? Open
Background Animal models suggest that paternal alcohol consumption may influence offspring traits, yet few human studies exist. Methods Data from population‐based studies of fetal alcohol spectrum disorders (FASD) among first‐grade student…
View article: XMM-Newton follow-up of two eROSITA X-ray binary candidates
XMM-Newton follow-up of two eROSITA X-ray binary candidates Open
We report on the follow-up observations with XMM- Newton of two X-ray binary candidates identified in the first eROSITA all-sky survey data (eRASS1), 1eRASS J061330.8 $$+$$ 160440 and 1eRASS J161201.9−464622. Based on the obtained results,…
View article: NuSTAR Broadband X-Ray Observation of EF Eri Following its Reawakening into a High Accretion State
NuSTAR Broadband X-Ray Observation of EF Eri Following its Reawakening into a High Accretion State Open
We present the first NuSTAR X-ray observation of EF Eri, a well-known polar system. The NuSTAR observation was conducted in conjunction with NICER shortly after EF Eri entered a high accretion state following an unprecedented period of low…
View article: Evaluation of commercially available produce antimicrobial washes to improve the quality and microbial safety of fresh produce
Evaluation of commercially available produce antimicrobial washes to improve the quality and microbial safety of fresh produce Open
Despite ongoing efforts to mitigate foodborne pathogen contamination, outbreaks associated with the consumption of fresh produce persist. This research evaluated the efficacy of three sanitizers in reducing various microorganisms on the su…
View article: The stellar population in the SARAO MeerKAT Galactic Plane Survey
The stellar population in the SARAO MeerKAT Galactic Plane Survey Open
We report on optically selected stellar candidates of SARAO MeerKAT 1.3 GHz radio continuum survey sources of the Galactic plane. Stellar counterparts to radio sources are selected by cross-matching the MeerKAT source positions with Gaia D…
View article: MeerKAT discovery of a hyperactive repeating fast radio burst source
MeerKAT discovery of a hyperactive repeating fast radio burst source Open
We present the discovery and localization of a repeating fast radio burst (FRB) source from the MeerTRAP project, a commensal fast radio transient search programme using the MeerKAT telescope. FRB 20240619D was first discovered on 2024 Jun…
View article: A targeted search for binary white dwarf pulsars using <i>Gaia</i> and WISE
A targeted search for binary white dwarf pulsars using <i>Gaia</i> and WISE Open
After its discovery in 2016, the white dwarf binary AR Scorpii (AR Sco) remained for several years the only white dwarf system to show pulsed radio emission associated with a fast-spinning white dwarf. The evolutionary origin and the emiss…
View article: A targeted search for binary white dwarf pulsars using Gaia and WISE
A targeted search for binary white dwarf pulsars using Gaia and WISE Open
After its discovery in 2016, the white dwarf binary AR Scorpii (AR Sco) remained for several years the only white dwarf system to show pulsed radio emission associated with a fast-spinning white dwarf. The evolutionary origin and the emiss…
View article: Detection of the White Dwarf Spin of the Long-orbital Period Magnetic Cataclysmic Variable V1082 Sgr
Detection of the White Dwarf Spin of the Long-orbital Period Magnetic Cataclysmic Variable V1082 Sgr Open
We report on the discovery of circular polarization modulated with a period of 1.943 ± 0.002 hr in the cataclysmic variable V1082 Sgr. These findings unambiguously reveal the rotation of a magnetic white dwarf and establish its intermediat…
View article: Detection of an Orphan X-Ray Flare from a Blazar Candidate EP240709a with the Einstein Probe
Detection of an Orphan X-Ray Flare from a Blazar Candidate EP240709a with the Einstein Probe Open
Blazars are often observed to flare across multiple wavelengths. Orphan flares from blazars have only been detected a few times, providing an opportunity to understand the structure of the jet in the accreting system. We report a remarkabl…
View article: A lasting legacy
A lasting legacy Open
Ingrid Pelisoli, Boris Gänsicke and colleagues celebrate the legacy of Tom Marsh, both in his wide-ranging research and as a driving force behind the 21 successful years of astronomy at the University of Warwick
View article: DW Cnc: a micronova with a negative superhump and a flickering spin
DW Cnc: a micronova with a negative superhump and a flickering spin Open
Magnetic accreting white dwarfs in cataclysmic variables have been known to show bursts driven by different physical mechanisms; however, the burst occurrence is much rarer than in their non-magnetic counterparts. DW Cnc is a well-studied …