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September 12th, 2007

Image Source.

It’s not looking good for transits by HD 17156 b. Ron Bissinger of Pleasanton, California obtained a block of photometric data that covered a significant chunk of the transit window. His time series lasts from JD 2454353.68 through 2452353.88, and shows no hint of an event:

His observations were taken just after the peak of the transit midpoint histogram:

No word yet on whether anyone in Europe or the eastern US were able to observe during the first half of the window. If you got data, let me know.

Also, the Gliese 176 window has opened up. If you’ve got a telescope, a CCD, and a free evening, you know what to do!

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  1. September 12th, 2007 at 15:47 | #1

    Dear Greg,

    As your satellite image was indicating, Belgian skies were completely clouded on Sep 10/11th, so I had no chance to do photometry on HD 17156 b.

    Best regards,
    Tonny Vanmunster

  2. greg
    September 13th, 2007 at 21:14 | #2

    Hi Tonny,

    Thanks for the update! Hopefully the window can be closed up sometime this season…


  3. Jose Manuel
    September 14th, 2007 at 19:16 | #3

    Hi Greg,

    I observed HD17156 in the transit window. Unfortunately the night was windy,
    affecting the small telescope so the photometry is not so clear as we would wish. Anybody else observed?

    It’s possible that I have a central transit. I can show you some plots if you want.
    I will try to observe again on december 3 (I think that is my next opportunity).


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