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Dátum: 2004-09-04 08:27:04
Feladó: Kereszty Zsolt
Tárgy: RE: ma este exobolygo-atvonulas: Final reduction of TrES-1 transit observations
Koszonjuk az infot!

De kutya legyek, ha ki tudok errol nyomozni egy tranzit
atmenet idopontot, esetleg Laci Te tudod?

Kereszty Zsolt
-------------------------------
Corona Borealis Observatory
Hungary, Gyorujbarat
WEB: http://kereszty.csillagaszat.hu
E-mail: cbo@axelero.hu

-----Original Message-----
From: listserv@mcse.hu [mailto:listserv@mcse.hu]On Behalf Of
CSILLAGKEP-l: Laszlo Kiss
Sent: Saturday, September 04, 2004 2:48 AM
To: cbo@axelero.hu
Subject: Fwd: ma este exobolygo-atvonulas: Final reduction of TrES-1
transit observations


Sziasztok,

CCD-sek, lassuk, ki a legeny a gaton...

Ksl

----------  Forwarded Message  ----------

Subject: [vsnet-obs 50760] Final reduction of TrES-1 transit observations
Date: Saturday 04 September 2004 10:29
From: "Tonny Vanmunster"
To: "cba-news"
Cc: "Aavso-Photometry" , "vsnet-obs"

Dear colleagues,

I herewith include updated information on my transit observations of
exoplanet TrES-1, dd September 1st, 2004. The article featured on the
Sky&Telescope website shows a picture of my raw (unprocessed) transit
light curve, that was based on a single comparison star.

Meanwhile, I have used the technique of ensemble photometry (using 7
comparison stars) to increase the accuracy of my observations. This has
resulted in a better photometric light curve, which is reproduced on my
web site (www.cbabelgium.com). Each data point or bin is the average
value of 5 subsequent CCD measurements. Also shown is the standard
deviation per bin. Overall, I obtained a photometric accuracy of 0.003
mag.

Based on the improved data, I furthermore derive :

- magnitude drop : 0.025 mag
- time of ingress (heliocentric) : 2004, Sep 1 at 21h23m UT +/- 2 min
(about 10 min later than the transitsearch ephemeris)
- time of egress (heliocentric) : 2004, Sep 1 at 23h50m UT +/- 3 min
(about 4 min later than predicted)
- duration central transit : 147 min (published value : 152 min)

Tomorrow brings another opportunity over Europe to observe a transit of
TrES-1. It would be interesting to learn about follow-up observations,
and to see if the above statements regarding ingress/egress time
differences are confirmed.

Best regards,
Tonny

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

  

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