Pith. sign in

REVIEW 3 cited by

A rapid change in X-ray variability and a jet ejection in the black hole transient MAXI J1820+070

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2003.01012 v1 pith:KJR5HXXG submitted 2020-03-02 astro-ph.HE

Jeroen Homan , Joe Bright , Sara E. Motta , Diego Altamirano , Zaven Arzoumanian , Arkadip Basak , Tomaso M. Belloni , Edward M. Cackett
show 8 more authors
Rob Fender Keith C. Gendreau Erin Kara Dheeraj R. Pasham Ronald A. Remillard James F. Steiner Abigail L. Stevens Phil Uttley
This is my paper · ORCID
classification astro-ph.HE
keywords x-rayblackholeradiostateflarej1820launch
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

We present Neutron Star Interior Composition Explorer X-ray and Arcminute Microkelvin Imager Large Array radio observations of a rapid hard-to-soft state transition in the black hole X-ray transient MAXI J1820+070. During the transition from the hard state to the soft state a switch between two particular types of quasiperiodic oscillations (QPOs) was seen in the X-ray power density spectra, from type-C to type-B, along with a drop in the strength of the broadband X-ray variability and a brief flare in the 7-12 keV band. Soon after this switch (~1.5-2.5 hr) a strong radio flare was observed that corresponded to the launch of superluminal ejecta. Although hints of a connection between QPO transitions and radio flares have been seen in other black hole X-ray transients, our observations constitute the strongest observational evidence to date for a link between the appearance of type-B QPOs and the launch of discrete jet ejections.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The emergence of X-ray emission lines during relativistic radio-jet formation in the changing-look active galactic nucleus 1ES 1927+654

    astro-ph.HE 2026-07 conditional novelty 6.0 of 10

    X-ray emission lines and a broad iron feature emerged in changing-look AGN 1ES 1927+654 concurrently with radio-jet formation and declining ionized outflows from 2022 to 2025.

  2. Spectro-temporal Investigation of Quasi-periodic Oscillations From Black Hole X-ray Binary 4U 1630-472 Using $\textit{NICER}$

    astro-ph.HE 2025-01 conditional novelty 5.0 of 10

    Type-C QPOs in the 2021 outburst of 4U 1630-472 show a strong photon index versus frequency correlation and a significant Q-factor break at about 2.31 Hz.

  3. Rapid Response Triggering for Radio Transients with the SKA Observatory

    astro-ph.IM 2026-07 accept novelty 3.0 of 10

    SKA-Low and SKA-Mid should implement automated rapid-response triggering on external and internal alerts to enable early radio observations of diverse transients.

Pith tools