[Aavso-photometry] TrES-1 exoplanet transit observation started at CBA Belgium Observatory - ingress successfuly measured

[Tonny Vanmunster]

Dear colleagues,

I have started a time-series photometry session on a transit of exoplanet
TrES-1 earlier tonight (2004 Sep 1, at 19h34m UT), under very good sky
conditions. TrES-1 is a very recently discovered exoplanet (see
http://skyandtelescope.com/news/article_1330_1.asp and
http://arxiv.org/PS_cache/astro-ph/pdf/0408/0408421.pdf for more details),
that has not yet been observed by amateurs before.

I'm using a 0.35-m f/6.3 telescope with an unfiltered ST-7XME CCD camera, at
CBA Belgium Observatory. An intermediate light curve analysis of the
acquired data (up till 22h10m UT) very well shows the ingress, which seems
to have started very close to the predicted time of 21h13m UT. A fading by
approx. 0.02 mag is clearly visible in the "raw" light curve (that is, even
without stacking and/or averaging images).

I will continue to measure the transit all night long - given the very good
weather conditions, and spend time tomorrow in the final analysis of the
results. I will keep you informed about the outcome and will present results
on my website as well.

Best regards,
Tonny

PS : Telescope 2 at CBA Belgium Observatory meanwhile is doing CCD
photometry on V1315 Aql, a CBA target.


Tonny Vanmunster
CBA Belgium Observatory
http://www.cbabelgium.com
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PERANSO : The Final Frontier of Period Analysis Software
http://www.peranso.com
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