Published February 1990
| Version v1
Journal article
Ginga observations of quasi-periodic oscillations in type II bursts from the Rapid Burster
- 1. Institute of Physical and Chemical Research, Wako (Japan)
- 2. Institute of Space and Astronautical Science, Sagamihara (Japan)
Description
During Ginga observations of the Rapid Burster in August 1988, strong quasi-periodic oscillations (QPOs) were detected in its X-ray intensity. The QPOs had centroid frequencies of 5 and 2 Hz during type II X-ray bursts which lasted for 10 and 30 s, respectively. The presence of the QPOs is correlated with the time scale-invariant burst profile. They are very strong during the initial peak in the burst, absent in the second peak, and strong again at the onset of the third peak. From an analysis of the X-ray spectrum as observed during the maxima and minima of the oscillations, it is found that the oscillations can be described by changes of the temperature of a blackbody emitter of constant apparent area. 47 refs
Additional details
Publishing Information
- Journal Title
- Astrophysical Journal
- Journal Volume
- 350
- Series
- Astrophys. J.
- Journal Page Range
- 395-407
- ISSN
- 0004-637X
- CODEN
- ASJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21055650
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- COSMIC X-RAY BURSTS; COSMIC X-RAY SOURCES; OSCILLATIONS; SPLINE FUNCTIONS; STARS; STELLAR RADIATION; X RADIATION; X-RAY SPECTRA
- Descriptors DEC
- COSMIC RADIATION; COSMIC RAY SOURCES; ELECTROMAGNETIC RADIATION; FUNCTIONS; IONIZING RADIATIONS; PRIMARY COSMIC RADIATION; RADIATIONS; SPECTRA