Comments

    The JK-based mag's differ from the discovery paper's reported mag's by ~0.8 mag. I'll do an all-sky calibration when this field is observable.

Basic Data

    RA = 23:39:05.8, Decl = +42:27:58
    Season = September 21
    B = 10.88, V = 10.54, R ~ 10.3, I ~ 10.0, B-V = 0.34 (preliminary mag's), J = 9.228, K = 9.313
    HJDo = 4035.67575 ± 0.00028 & P = 3.852985 ± 0.000005 days (as listed in Schneider's Extrasolar Planets Encyclopaedia)
    HJDo = 4035.67575 (56) & P = 3.8529906 (14) days (as solved for using entries in AXA database)
    Depth = 9.8 ± 0.8 (R,C-band) & 11.0 ± 0.3 mmag (z-band)
    Length = 3.43 ± 0.05 (R,C-band) & 3.51 ± 0.04 hr
    Fp = 0.29 ± 0.05, F2 = 0.79 ± 0.10
    b = 0.60 +- 0.03

Summary of Amateur Observations

Light Curves

9820SG21

9720SG2

Occasionally systematic variations by two observers of the same transit will coincide to produce what might otherwise be identified as a real brightening or fading. This may be an example. However, it is also possible that at 05.6 UT the exoplanet passed in front of a star spot (aka, sunspot) and at 06.3 it passed in front of a bright area on the star. If only we had a third set of observations!

 
8a28FCN1

8a28GBL1


Professional Light Curves

Here's the discovery paper light curve.


Discovery paper LC. My analysis gives D = 10.1

Finder Charts

FOV = 30 x 20 'arc.

References

Discovery paper by Noyes et al, 2008 (arXiv version): http://lanl.arxiv.org/abs/0710.2894

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WebMaster: Bruce L. Gary.  Nothing on this web page is copyrighted. This site opened:  October 16, 2007.  Last Update:  2009.08.25