On the optical variability of the QSO PKS 2128-123

Details On the optical variability of the QSO PKS 2128-123 On the optical variability of the QSO PKS 2128-123

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90...39m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, Jan. 1985, p. 39-42.

Astronomy and Astrophysics

Astronomy

7

Astronomical Photometry, Quasars, Variability, Continuous Spectra, Extragalactic Radio Sources, Infrared Astronomy, Ubv Spectra

Scientific paper

Although the QSO PKS 2128 - 123 appears as highly variable in the I band, with Delta-I of up to 1.69 mag, it is a moderate amplitude variable object in the other bands of the present UBVRI observations. Excluding these I fluxes, the average continuum is well fitted by a power law when the Balmer continuum contribution, which enters the V band, has been removed. The variability parameter of only about 1 day implies a very compact source for the continuum.

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