Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3672....1n&link_type=abstract
The Astronomer's Telegram, #3672
Physics
Optical, Agn, Blazar
Scientific paper
Prompted by the ATel #3670 we observed the blazar 4C +27.08 with the TACOR telescope of the Department of Physics at La Sapienza University on 2011-10-06 UT 21:30, under a veiled sky. An Apogee U2 CCD camera was used with a standard R (Cousins) filter. About 80 images of 30s exposure each were taken, in sequences of 20 images with slightly different sky pointing, to ensure that possible hot pixels do not fall always on the same star.
Nesci Roberto
Sclavi Silvia
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