Visual Phased Curve Drop of Kepler's Moon- sized Planet Transiting KIC 8478994

 

Phased curve of Moon-sized planet transiting KIC 8478994 by Kian Jek

troyw

 

AKO see's it, but just barely.
http://www.extrasolar.us/AKO/AKOimage.php?period=13.3673&KID=8478994&fixMin=2244231.5&fixMax=2244331.5

TTVs are also present it seems.

7 days ago

troyw

 

Should also be noted that this small fry was not picked up by the TCE.

7 days ago

mschwamb (science team) in response to troyw

troyw:
Should also be noted that this small fry was not picked up by the TCE.

Tom cites the Batalha candidates paper when discussing all three detections and they're listed as KOIs in the Feb 2012 candidate release. TCE doesn't catch everything in multiplanet systems and particularly with how small the transit signal with other frequent transit signals in the light curve, it that may not be so surprising. I know that for each KOI pwhere a transit has been detected they fit the transits remove them from the light curve and then search the light curve for additional transit signals with a BLS periodogram. i presume that's how they found the small guy.
~Meg

6 days ago

mschwamb (science team)

In case you want to look at the light curve data we have on the site - the star's id is SPH21167068
Cheers,
~Meg

about 1 hour ago

kianjin

This was an interesting one to test out one's power of observation, and the 39 and 21-day transits are quite readily apparent.




On the other hand, if I didn't know what the period of planet b, there is just no way it could have been picked up using the NEA periodogram service. Presumably the Kepler team has more sophisticated tools.


The transit can barely be picked out here - no surprise as it's just 36ppm, and Kepler's sensitivity threshold is 30ppm!

You can follow this planet at Planet Hunters forum Talk thread here.