Published December 1, 1986
| Version v1
Journal article
EXOSAT observations of the Seyfert galaxy NGC 7469; rapid hard X-ray variability and a soft X-ray excess
Description
The results of a series of EXOSAT observations of the Seyfert 1 (and starburst) galaxy NGC 7469 performed in 1984 July are presented. During one observation, hard X-ray variability by a factor 2 within 5 hr was found, while the soft X-ray intensity remained constant. In addition the spectral data indicate an excess of soft X-ray emission over that expected from extrapolation of the hard X-ray continuum. There is no evidence for any variability of this soft excess. (author)
Additional details
Publishing Information
- Journal Title
- Mon. Not. R. Astron. Soc.
- Journal Volume
- 223
- Journal Issue
- 3
- Series
- Mon. Not. R. Astron. Soc.
- Journal Page Range
- 29P-35P
- ISSN
- 0035-8711
- CODEN
- MNRAA
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 18067266
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- EXPERIMENTAL DATA; HARD X RADIATION; LUMINOSITY; SEYFERT GALAXIES; SOFT X RADIATION; VARIATIONS; X RADIATION
- Descriptors DEC
- DATA; ELECTROMAGNETIC RADIATION; GALAXIES; INFORMATION; IONIZING RADIATIONS; NUMERICAL DATA; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS