Published May 15, 1987
| Version v1
Journal article
Quasi-periodic oscillations in the X-ray flux of GX 3+1 (4U 1744-26)
- 1. Massachusetts Inst. of Tech., Cambridge (USA). Dept. of Physics
- 2. Massachusetts Inst. of Tech., Cambridge (USA). Center for Space Research
- 3. Amsterdam Univ. (Netherlands). Astronomical Inst.
- 4. Max Planck-Institut fuer Extraterrestrische Physik, Garching (Germany, F.R.)
Description
GX 3 + 1, one of the brightest X-ray sources, was observed with EXOSAT in 1985 for 8.5 hr on March 24-25, and for 16 hr on September 4. During both observations the flux levels varied by about 20 per cent. The mean flux in September was about 8 per cent lower than in March. Throughout the March 24-25 observations, low-frequency noise (LFN) was observed below roughly 10 Hz, but no quasi-periodic oscillations (QPO) were detected. During the September 4 observations, LFN was again detected throughout, but this time QPO were also detected during an approximately 3.3-hr period. (author)
Additional details
Publishing Information
- Journal Title
- Mon. Not. R. Astron. Soc.
- Journal Volume
- 226
- Journal Issue
- 2
- Series
- Mon. Not. R. Astron. Soc.
- Journal Page Range
- 383-394
- ISSN
- 0035-8711
- CODEN
- MNRAA
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 18084230
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- COSMIC X-RAY SOURCES; EXPERIMENTAL DATA; OSCILLATIONS; RADIATION FLUX; TIME DEPENDENCE; VARIATIONS; X RADIATION
- Descriptors DEC
- COSMIC RAY SOURCES; DATA; ELECTROMAGNETIC RADIATION; INFORMATION; IONIZING RADIATIONS; NUMERICAL DATA; RADIATIONS