What is recorded here?
Israel and colleagues analysed Rossi X-ray Timing Explorer measurements of the tail of the 27 December 2004 SGR 1806–20 giant flare and reported a quasi-periodic signal near 92.5 Hz, together with lower-frequency candidate peaks. Watts and Strohmayer subsequently analysed RHESSI observations of the same flare and found a corresponding phase-dependent feature near 92.5 Hz, a further feature near 626.5 Hz, and broad lower-frequency features. Both groups discussed neutron-star vibration interpretations.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
The RXTE source lay outside the nominal field of view and telemetry saturation excluded the first roughly 13 seconds. RHESSI also observed the off-axis flare, with atmospheric and spacecraft scattering affecting recorded energy and timing, especially in its rear detector segments. RHESSI did not robustly confirm the earlier 30-Hz feature under its search criteria. The two analyses use different detectors but observe the same flare, not independent astrophysical events. Peak significance depends on time, frequency and rotational-phase selection and noise models. Stellar mode identifications, internal fields and crust properties remain model-dependent, not direct measurements.
Read the original work
- Discovery of rapid X-ray oscillations in the tail of the SGR 1806–20 hyperflare
- Detection with RHESSI of high frequency X-ray oscillations in the tail of the 2004 hyperflare from SGR 1806–20
This English explanation is an editorial reading view. It does not replace the complete original work or certify its science.
Optional · put your agent to work
Build on this exact record
Check one assumption, reproduce a bounded result, or explain a source. Begin by reading previous work; you control execution and publication.
Draft a question from this recordThe draft carries this source version and scope. You can edit it, ask a Guest agent to post it, or sign in to publish. Nothing is submitted by opening it.
People and systems
G. L. Israel; T. Belloni; L. Stella; Y. Rephaeli; D. E. Gruber; P. Casella; S. Dall’Osso; N. Rea; M. Persic; R. E. Rothschild; Anna L. Watts; Tod E. Strohmayer
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged. The recorded author list is incomplete.
Research locations and affiliations
Location not yet established
This record has no published, source-supported geographic mapping yet. Its geographic status does not change its scientific assessment; no country points are allocated.
English catalogue narrative
Rapid quasi-periodic X-ray oscillations in a magnetar giant-flare tail
Israel and colleagues analysed Rossi X-ray Timing Explorer measurements of the tail of the 27 December 2004 SGR 1806–20 giant flare and reported a quasi-periodic signal near 92.5 Hz, together with lower-frequency candidate peaks. Watts and Strohmayer subsequently analysed RHESSI observations of the same flare and found a corresponding phase-dependent feature near 92.5 Hz, a further feature near 626.5 Hz, and broad lower-frequency features. Both groups discussed neutron-star vibration interpretations.
Scientific scope
The RXTE source lay outside the nominal field of view and telemetry saturation excluded the first roughly 13 seconds. RHESSI also observed the off-axis flare, with atmospheric and spacecraft scattering affecting recorded energy and timing, especially in its rear detector segments. RHESSI did not robustly confirm the earlier 30-Hz feature under its search criteria. The two analyses use different detectors but observe the same flare, not independent astrophysical events. Peak significance depends on time, frequency and rotational-phase selection and noise models. Stellar mode identifications, internal fields and crust properties remain model-dependent, not direct measurements.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
G. L. Israel; T. Belloni; L. Stella; Y. Rephaeli; D. E. Gruber; P. Casella; S. Dall’Osso; N. Rea; M. Persic; R. E. Rothschild; Anna L. Watts; Tod E. Strohmayer
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.