Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...407l...1k&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 407, no. 1, p. L1-L4.
Astronomy and Astrophysics
Astronomy
5
Blazars, Space Observations (From Earth), Stellar Magnitude, Stellar Spectra, Variable Stars, Astronomical Photometry, Astronomical Polarimetry, Infrared Astronomy, Polarized Electromagnetic Radiation, Spectral Energy Distribution
Scientific paper
We present V-band CCD photometry, UBVRI photopolarimetry, and near simultaneous JHK photometry of 3C 345 during a renewed outburst in spring of 1992, which reached maximum at the end of April. The observations also show a large and variable polarization. There are very large variations in the position angle, unlike in previously published photopolarimetry of this object. Both the visible and the infrared magnitudes are amongst the brightest that have ever been measured in this object, whilst the continuum spectral energy distribution shows that excess in V which has been observed on some, but not all previous occasions. No convincing evidence is seen of rapid infrared variations on time scales of less than 2 hr.
de Diego Jose A.
Kidger Mark R.
Okyudo Masami
Sillanpää Aimo
Takalo Leo Olavi
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