CCD B & V Photometry of the Young, Active, Late-type Star PZ Telescopii

Details CCD B & V Photometry of the Young, Active, Late-type Star PZ Telescopii CCD B & V Photometry of the Young, Active, Late-type Star PZ Telescopii

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pz.....27....1i&link_type=abstract

Peremennye Zvezdy, vol.27, no. 1.

Computer Science

4

Scientific paper

We present new CCD B and V photometry, obtained at the Brightwater Observatory in June and July 2006, of PZ Telescopii (HD 174429), a young, rapidly rotating late-type star with an active chromosphere. The CCD data were collected with a short focal-length telescope, giving a field of view near 0.80 x 0.55 deg, so target and comparison stars could be observed simultaneously. A periodogram analysis of the PZ Tel data returned a value of 0.94 d, consistent with earlier photometry. We found the amplitude of variation was ~0.06 mag in B and V, with evidence for a small colour variation of between 0.01 and 0.02 mag, the star being redder when fainter. From a comparison with previously published photometry we find that the amplitude of V-light variation is amongst the smallest ever observed. There is an indication that there was a maximum in the long-term brightness level near V=8.28 around the year 2000, with the current data being several hundredths of a magnitude fainter.

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