Quasi-periodic flux variations in pulsar 1A 0535+262 are accompanied by synchronized cyclotron line energy oscillations, providing evidence for rapid geometric reconfiguration of the accretion column in the radiation-pressure-dominated regime.
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18 Pith papers cite this work, alongside 261 external citations. Polarity classification is still indexing.
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A soft-spectrum PULX candidate is reported in Cen A but XMM-SAS randomisation during data reduction renders the marginal 1.27 Hz pulsation detection unreliable across repeated reductions.
First IXPE polarization measurement of GX 340+0 in normal branch yields PD 1.22±0.25% and PA 38±6°, consistent with origin in blackbody or Comptonized emission, with radio flux lower than in horizontal branch.
A long thermonuclear burst from MAXI J0911–655 was followed ~1 day later by an X-ray flare, which the authors attribute to the burst triggering a thermal-viscous disk instability.
Candidate 1.97 keV absorption line in HLX 2SXPS J111416.1+481833 interpreted as proton CRSF implying B ~ 4e14 G for a neutron star accretor.
Swift J1727.8-1613 shows a positive correlation between energy-dependent time lag and X-ray polarization degree in a type-C QPO, which may require additional emission processes.
The highly broadened Fe K line in Her X-1 is resolved for the first time and is shown to vary with the neutron star rotation phase and 35-day precession cycle, supporting an accretion-column origin.
Candidate mHz QPOs detected in GX 3+1 at 7-15 mHz with 0.51-1.41% rms, one surviving global significance, occurring at higher luminosities than in other NS LMXBs.
Discovery and multiwavelength follow-up of EP J175257.3-351923, classified as a candidate black hole LMXB based on its 250-day FRED outburst, persistent hard state, truncated disk spectrum with ~217 keV cutoff, and flux ratios.
EP J174942.2-384834 is classified as a very faint X-ray transient black hole candidate based on its hard X-ray spectra, optical/UV brightening correlated with X-rays, and lack of radio emission.
New EP-FXT data on the 2024 outburst of magnetar 1E 1841-045 shows energy-dependent multi-peaked pulses, spectral hardening, BB temperature-pulse intensity correlations, and effective separation from supernova remnant emission.
An MCMC-based period search method recovers previously reported candidate periods in FRB 20201124A observations.
EP260321a is identified as the faintest shock breakout X-ray transient associated with broad-lined Ic supernova SN 2026gzf, interpreted as originating from a mildly relativistic weak outflow choked inside the progenitor star.
Multi-wavelength data from SDSS J1430+2303 are interpreted as evidence that radiation pressure instabilities drive a shrinking unstable accretion-disk zone, based on timing analysis, weak soft excess, and SED-derived black-hole parameters.
A recurring 0.03 Hz radio QPO was detected in the 2025 flare of GRS 1915+105 at >5.9 sigma in one epoch, identical across S- and X-bands and prior years, indicating an intrinsic accretion-jet timescale.
Black hole spin constraints for Cyg X-1 from XRISM Resolve data are strongly model-dependent, ranging from a*~0.99 with relxill to a*~0 with relxillCp or reflkerrD.
Wideband observations show M28A giant pulses differ from FRB 20200120E bursts in duration, luminosity, timing statistics, and spectral structure, yielding no strong evidence for a direct link.
The paper reports on the Astropy v5.0 release, project updates, ecosystem connections, and challenges facing the community-oriented open-source astronomy software effort.
citing papers explorer
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Rapid quasi-periodic reconfiguration of the accretion column in pulsar 1A 0535+262
Quasi-periodic flux variations in pulsar 1A 0535+262 are accompanied by synchronized cyclotron line energy oscillations, providing evidence for rapid geometric reconfiguration of the accretion column in the radiation-pressure-dominated regime.
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Significant or Not? The Impact of Randomisation During Data Reduction on Confirming a New Pulsating Ultraluminous X-ray Source Candidate in Centaurus A
A soft-spectrum PULX candidate is reported in Cen A but XMM-SAS randomisation during data reduction renders the marginal 1.27 Hz pulsation detection unreliable across repeated reductions.
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X-ray and Radio Campaign of the Z-source GX 340+0 II: the X-ray polarization in the normal branch
First IXPE polarization measurement of GX 340+0 in normal branch yields PD 1.22±0.25% and PA 38±6°, consistent with origin in blackbody or Comptonized emission, with radio flux lower than in horizontal branch.
-
Long thermonuclear burst driven thermal-viscous instability of accretion disk: triggering an outburst-like X-ray flare
A long thermonuclear burst from MAXI J0911–655 was followed ~1 day later by an X-ray flare, which the authors attribute to the burst triggering a thermal-viscous disk instability.
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Discovery of a Candidate 2 keV Cyclotron Resonance Scattering Feature in the HLX NGC 3583 X-1
Candidate 1.97 keV absorption line in HLX 2SXPS J111416.1+481833 interpreted as proton CRSF implying B ~ 4e14 G for a neutron star accretor.
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Bridging X-ray Polarization with Timing & Spectroscopic Parameters of a galactic black hole: Swift J1727.8-1613
Swift J1727.8-1613 shows a positive correlation between energy-dependent time lag and X-ray polarization degree in a type-C QPO, which may require additional emission processes.
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XRISM/Resolve observations of Hercules X-1: a pulsating, highly broadened Fe K emission line from the neutron star accretion column
The highly broadened Fe K line in Her X-1 is resolved for the first time and is shown to vary with the neutron star rotation phase and 35-day precession cycle, supporting an accretion-column origin.
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Evidence for Millihertz Oscillations in the bright atoll source GX 3+1
Candidate mHz QPOs detected in GX 3+1 at 7-15 mHz with 0.51-1.41% rms, one surviving global significance, occurring at higher luminosities than in other NS LMXBs.
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Discovery of EP J175257.3-351923 as a Candidate Black Hole Low-Mass X-ray Binary
Discovery and multiwavelength follow-up of EP J175257.3-351923, classified as a candidate black hole LMXB based on its 250-day FRED outburst, persistent hard state, truncated disk spectrum with ~217 keV cutoff, and flux ratios.
-
Multi-wavelength outburst activity from EP J174942.2-384834: a very faint X-ray transient discovered by Einstein Probe
EP J174942.2-384834 is classified as a very faint X-ray transient black hole candidate based on its hard X-ray spectra, optical/UV brightening correlated with X-rays, and lack of radio emission.
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Resolving the 2024 Outburst of Magnetar 1E 1841-045 from its host Supernova Remnant with EP-FXT
New EP-FXT data on the 2024 outburst of magnetar 1E 1841-045 shows energy-dependent multi-peaked pulses, spectral hardening, BB temperature-pulse intensity correlations, and effective separation from supernova remnant emission.
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Revisiting the Reported Period of FRB 20201124A Using MCMC Methods
An MCMC-based period search method recovers previously reported candidate periods in FRB 20201124A observations.
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EP260321a/SN 2026gzf: The Faintest Shock Breakout Associated with a Broad-Lined Supernova
EP260321a is identified as the faintest shock breakout X-ray transient associated with broad-lined Ic supernova SN 2026gzf, interpreted as originating from a mildly relativistic weak outflow choked inside the progenitor star.
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Radiation Pressure Instability in the "turn-on" Changing-Look AGN SDSS J1430+2303
Multi-wavelength data from SDSS J1430+2303 are interpreted as evidence that radiation pressure instabilities drive a shrinking unstable accretion-disk zone, based on timing analysis, weak soft excess, and SED-derived black-hole parameters.
-
A 0.03 Hz Radio Quasi-periodic Oscillation During the 2025 Flare of GRS 1915+105
A recurring 0.03 Hz radio QPO was detected in the 2025 flare of GRS 1915+105 at >5.9 sigma in one epoch, identical across S- and X-bands and prior years, indicating an intrinsic accretion-jet timescale.
-
Model dependence of XRISM black-hole spin constraints in Cyg X-1
Black hole spin constraints for Cyg X-1 from XRISM Resolve data are strongly model-dependent, ranging from a*~0.99 with relxill to a*~0 with relxillCp or reflkerrD.
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Searching for links between energetic millisecond pulsars and repeating fast radio bursts
Wideband observations show M28A giant pulses differ from FRB 20200120E bursts in duration, luminosity, timing statistics, and spectral structure, yielding no strong evidence for a direct link.
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The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
The paper reports on the Astropy v5.0 release, project updates, ecosystem connections, and challenges facing the community-oriented open-source astronomy software effort.