Optical measurements during increased gamma-ray activity in 3C 454.3

Details Optical measurements during increased gamma-ray activity in 3C 454.3 Optical measurements during increased gamma-ray activity in 3C 454.3

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2535....1s&link_type=abstract

The Astronomer's Telegram, #2535

Astronomy and Astrophysics

Astronomy

1

Optical, Gamma Ray, Agn, Quasars

Scientific paper

Observations obtained with the Steward Observatory 2.3m Bok Telescope show 3C 454.3 to be optically bright and highly linear polarized during a period of increased gamma-ray activity (ATel #2534). Differential spectrophotometry yield a V-band magnitude of 15.02 ± 0.02 and an R-band (Kron-Cousins bandpass) magnitude of 14.53 ± 0.01 on 2010 April 5, 12:10 UT. Spectropolarimetry of 3C 454.3 with the SPOL instrument find an average linear polarization of 9.85 ± 0.17% at a position angle of 23.0 ± 0.5 degrees over a 5000-7000 Angstrom spectral bin.

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