CGRO, Radio and Optical Observations of the Quasar NRAO 140

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

We report on Compton Gamma Ray Observatory (CGRO), radio and optical observations of the radio-loud, superluminal quasar NRAO 140. The source is not detected (at a significance of greater than 3 sigma) by any of the CGRO instruments OSSE, Comptel and EGRET. Radio observations simultaneous to the OSSE observation and optical monitoring over three-monthly intervals show no signs of extraordinary behaviour when compared to previous observations. We demonstrate that the CGRO non-detections do not require a spectral break at hard X-rays, but can be explained by a steep spectrum in the MeV range comparable to that of 3C273.
to appear in A&AS, Proc. of 3rd Compton Symposium, A&A Latex

Keywords

Astrophysics

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/10653

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/astro-ph/9609002
 http://arxiv.org/abs/astro-ph/9609002

Collections

arXiv