Rapid variations and a very deep minimum in the light curve of 3C 345

Details Rapid variations and a very deep minimum in the light curve of 3C 345 Rapid variations and a very deep minimum in the light curve of 3C 345

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227l..25k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 2, Jan. 1990, p. L25-L28.

Astronomy and Astrophysics

Astrophysics

20

Light Curve, Stellar Spectrophotometry, Variable Stars, Charge Coupled Devices, Emission Spectra, Faint Objects, Stellar Flares, Stellar Magnitude

Scientific paper

This paper reports CCD photometry of 3C345 taken in the summer of 1988 and spring of 1989 which show this object declining to the faintest magnitude yet recorded in B, of 18.32. A full light curve is presented, as well as an intraday and a three-week continuous light curve. Rapid CCD photometry at this faint level reveals the presence of a rapid fade in the light curve which, if real, is probably the fastest variation ever seen in this object in terms of magnitudes per hour. The existence of intraday variability in 3C 345 is now no longer in doubt.

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