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Publications of the Astronomical Society of Australia Publications of the Astronomical Society of Australia Society
Publications of the Astronomical Society of Australia
RESEARCH ARTICLE

Optical to Far-IR Observations of 3C 446

K.J. Leech, R. Saxton, P. Barr, M. Santos-Lleo, E. Jiminez-Bailon, R. Diaz, K. Ghosh and S. Soundararajapervmal

Publications of the Astronomical Society of Australia 19(1) 152 - 154
Published: 30 April 2002

Abstract

The OVV blazar 3C 446 was monitored over seven months in 1997 with ground based telescopes and instruments on ESA's Infrared Space Observatory (ISO). The aim was to try to detect variations in the IR and see if these were correlated with optical variations. The object varied in the optical and near-IR during this period, but did not vary in the far-IR. Despite being a factor of ten weaker than in 1983, the optical-IR SED exhibited the same slope. The new far-IR observations from ISO allow us to determine the location of the turnover in the spectrum, caused by synchrotron self-absorption. It occurs just longwards of 100 μm.

Keywords: BL Lacertae objects: individual ( 3C 446) — infrared: galaxies

https://doi.org/10.1071/AS01110

© ASA 2002

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