Published January 1990
| Version v1
Journal article
Nonthermal X-ray emission from 3C 273 - The core of a knotty problem?
- 1. CNR, Istituto di Astrofisica Spaziale, Frascati (Italy)
- 2. Southampton Univ. (England)
Description
The quasar 3C 273 was observed in the hard X-ray region of the spectrum (15-300 keV) during a stratospheric balloon flight on July 15, 1987. The emitted photon spectrum is well described by a single power law of photon index -1.61 which corresponds to a hard (20-200 keV) X-ray luminosity of 0.8 x 10 to the 47th ergs/s. This flux is consistent with the 1978/1979 HEAO 1 and AIT/MPI measurements and about a factor of three below the high state measured in 1981 (AIT/MPI). The implications of these results with respect to the location of the production site and mechanism are discussed. 26 refs
Additional details
Publishing Information
- Journal Title
- Astrophysical Journal
- Journal Volume
- 349
- Series
- Astrophys. J.
- Journal Page Range
- 41-44
- ISSN
- 0004-637X
- CODEN
- ASJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21055588
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- EMISSION SPECTRA; HARD X RADIATION; QUASARS; RADIATION FLUX; SPECTROSCOPY; TELESCOPES; X-RAY SPECTRA
- Descriptors DEC
- COSMIC RADIO SOURCES; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; RADIATIONS; SPECTRA; X RADIATION