Amateur Kepler Observatory Identifies 15 Possible TTV Planet Candidates

Planet Hunters forum Talk member troyw has developed a novel program for analyzing Kepler light curves called the Amateur Kepler Observatory (AKO). Here is his introductory comment:

"AKO is web based software continually developed for viewing data from the Kepler Space Telescope. AKO is currently limited to long cadence data. AKO reads the data entered into its database and sorts that data in a specific way. The data is sorted into rows and columns, and each data point is represented by a grey colored box, usually 3 pixels by 3 pixels, on a dynamically generated image."

More detailed information here.

Troy has created a new thread on the Planet Hunters Science board called " Planetary Transit Timing Variation (TTV). The black horizontal lines are indications of a planet transit. One of the unique aspects of AKO is looking for Transit Timing Variations (TTVs) in the Kepler data for exoplanets. This is performed by stacking multiple quarters of the star's light curves.

troyw

15 potential TTV candidates, some of which I have posted elsewhere. KOI and KID numbers are as follows for this set:

KOI 374 KID 8686097
KOI 1162 KID 10528068
KOI 1245 KID 6693640
KOI 1273 KID 8806072
KOI 1412 KID 8950853
KOI 1831 KID 11601584
KOI 1914 KID 8426567
KOI 1934 KID 4242147
KOI 2037 KID 9634821
KOI 2062 KID 6774880
KOI 2094 KID 8505920
KOI 2125 KID 9405595
KOI 2166 KID 4370527
KOI 2291 KID 8410415
KOI 2351 KID 1872821

4 days ago

troyw

KOI 1582.01 KID 4918309

4 days ago

robert gagliano

Well done troyw. It would be very useful to have a comprehensive alphanumeric list of all TTVs (KIDs, KOIs, ect) found with AKO by everyone posted on this thread for crosschecking and updating. The TTVs currently are posted in multiple different threads. It's impossible to keep track. It would be nice to have one thread as "TTV Central".

4 days ago

troyw

Yeah, that's sort of the idea, although I'd rather keep stellar TTVs separate from the planetary ones. I'll make another thread when I get the time for the stellar TTV candidates.

3 days ago

planetsam

Don't forget KOI 868 - KID 6867155

Known Eclipsing Binary with Unknown Third Body KID 11519226

Planet Hunters forum Talk member troyw has identified transit timing variations (TTVs) in a known eclipsing binary star system KID 11519226 using his Amateur Kepler Obvservatory (AKO) program. The TTVs indicate a third orbiting body associated with this system.

troyw:

This star system shows TTVs for both the primary and secondary sets of transits. The published period is 22.1745d, but the data started being collected during a prominent swing in the TTVs, throwing off the period slightly. A more accurate period looks like 22.162d.
image link




Note the change in the black horizontal line indicating the TTVs.

Kian Jek:

Nice find, Troy! The profile of the TTVs for the primary and the secondary eclipses are not quite the inverse of each other, as the curve-fits are slightly different in the O-C plot:




You can follow this eclipsing star system with an unknown third orbiting body here.

Amateur Kepler Observatory (AKO) at Planet Hunters

Planet Hunters forum Talk member troyw has developed a novel program for analyzing Kepler light curves called the Amateur Kepler Observatory (AKO). Here is his introductory comment:

"AKO is web based software continually developed for viewing data from the Kepler Space Telescope. AKO is currently limited to long cadence data. AKO reads the data entered into its database and sorts that data in a specific way. The data is sorted into rows and columns, and each data point is represented by a grey colored box, usually 3 pixels by 3 pixels, on a dynamically generated image."

More detailed information here.

Troy has a thread on the Planet Hunters Science board called "AKO possible discoveries". Here is an example of an AKO graph  for KID 11853878 / KOI 1833 - two possible planet additions.
referenced here.

The black horizontal lines are indications of a planet transit. One of the unique aspects of AKO is looking for Transit Timing Variations (TTVs) in the Kepler data for exoplanets. This is performed by stacking multiple quarters of the star's light curves.