Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· On-line Data
· References in the article
· Citations to the Article (119) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (2)
· NED Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Simultaneous Multiwavelength Spectrum and Variability of 3C 279 from 10 9 to 10 24 Hz
Authors:
Hartman, R. C.; Webb, J. R.; Marscher, A. P.; Travis, J. P.; Dermer, C. D.; Aller, H. D.; Aller, M. F.; Balonek, T. J.; Bennett, K.; Bloom, S. D.; Fujimoto, R.; Hermsen, W.; Hughes, P.; Jenkins, P.; Kii, T.; Kurfess, J. D.; Makino, F.; Mattox, J. R.; von Montigny, C.; Ohashi, T.; Robson, I.; Ryan, J.; Sadun, A.; Schoenfelder, V.; Smith, A. G.; Teraesranta, H.; Tornikoski, M.; Turner, M. J. L.
Publication:
Astrophysical Journal v.461, p.698 (ApJ Homepage)
Publication Date:
04/1996
Origin:
APJ; NED
Astronomy Keywords:
INFRARED: GALAXIES, GAMMA RAYS: OBSERVATIONS, GALAXIES: QUASARS: INDIVIDUAL ALPHANUMERIC: 3C 279, X-RAYS: GALAXIES
DOI:
10.1086/177095
Bibliographic Code:
1996ApJ...461..698H

Abstract

Data from a number of monitoring programs have been combined with data from the Compton Gamma Ray Observatory and the Ginga X-ray satellite to construct a spectrum covering nearly 15 decades in frequency during or near the time of the 3C 279 gamma-ray flare observed by EGRET in 1991 June. A much less complete spectrum is presented for 1991 October. Light curves from early 1991 to mid-1992 are presented for radio, millimeter, submillimeter, infrared, optical, and gamma-rays. Although the temporal coverage is incomplete, the only evidence for correlation in variability between the gamma-rays and lower frequencies is a flare in the optical R-band that peaks within ~1 day of the maximum in the gamma-ray light curve. The variability shows higher relative amplitude in gamma-rays than in the R band. We present spectral fits to the overall multi-wave band spectrum averaged over the 1991 June flare corresponding to two models: (i) synchrotron self-Compton (SSC) emission from a relativistic jet and (ii) inverse Compton scattering of seed photons originating external to the jet (ECS) by the synchrotron-emitting relativistic electrons in the jet. Either model can fit the observed spectra satisfactorily. The higher amplitude of the gamma-ray variations is as predicted by the SSC model and can be accommodated within the ECS model if the flare is caused by a temporary change in the bulk Lorentz factor of the gamma-ray-emitting plasma.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints