Published July 1, 1982
| Version v1
Journal article
Evidence for 200 second variability in the x-ray flux of the quasar 1525+227
Creators
- 1. Department of Physics and Astronomy, Rutgers University
Description
Sixteen hundred seconds of Einstein Observatory IPC data for 1525+227, a bright, nearby (m/sub v/ = 16.4, z = 0.253) quasar show significant intensity fluctuations on a time scale of 200 seconds. Similar fluctuations were not detected 13 months later during a follow-up 12,500 second observation. Interpretation of the time variations requires H0> or =100 km s-1 Mpc-1 to obtain even marginal consistency with standard isotropic emission models. An alternative interpretation invokes anisotropic emission probably due to the presence of relativistic motions with associated beaming effects
Additional details
Publishing Information
- Journal Title
- Astrophys. J., Lett. Ed.
- Journal Volume
- 258
- Journal Issue
- 1
- Series
- Astrophys. J., Lett. Ed.
- Journal Page Range
- L1-L5
- ISSN
- 0571-7248
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 14730395
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- COSMIC X-RAY SOURCES; EMISSION; FLUCTUATIONS; PHOTONS; QUASARS; X RADIATION; X-RAY SPECTRA
- Descriptors DEC
- COSMIC RADIO SOURCES; COSMIC RAY SOURCES; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; IONIZING RADIATIONS; MASSLESS PARTICLES; RADIATIONS; SPECTRA; VARIATIONS