As the KELT followup up network has grown larger and demonstrates its potential, we have started adding new types of targets to the target list. They fall into several categories, and some of them involve different observing requirements than regular KELT transit targets. Here is a partial list of them:
Warm Jupiters - These are a set of transiting Jupiters from the K2 mission that have been selected by Avi Shporer as a class of "Warm Jupiters" that can be used to probe certain properties of giant planets including various theories for inflated planets. These Warm Jupiters generally fall well on the other side of the regime from the highly insolated Hot Jupiters that dominate the studies of inflated planets. Avi has selected 11 Warm Jupiters from K2, and we want to get followup photometry from KELT, mainly to confirm and refine the ephemerides of these systems, since the K2 campaigns did not last too long. These targets have V-mags of 10 to 15, periods ranging from 10-60 days, transit durations from 2.5 to 7.5 hours, and depths from 2-40 mmag. These will generally be hard to observe, although still tractable. And even partial transits will be useful for refining the ephemeris. These objects are listed with the name prefix "K2WJ".
Kepler EBs - These are particular EBs discovered by Kepler that are of interest for dynamical purposes. Either they have eclipse timing variations (ETVs) due to third bodies in the system, or they have circumbinary planets. On the transit finder, they are listed with the prefix "Kepler-EB" or "KOI". These targets normally have deep eclipses (much larger than 1%) but are also very long, in many cases much longer than a typical observing night. For these cases, follow the following guidelines:
Observing just an ingress or egress is fine, but make sure to get at least 30 minutes baseline data.
You can observe just the bottom of the eclipse. The important thing to to capture an inflection point so that we can get good timing of the event.
Less worry about photometric precision. RMS of 1-2% should be fine.
Some objects are faint. Make sure your observing cadence is better than 10 minutes.
KELT M-dwarf EBs - These targets are eclipsing binaries with M dwarf companions wherein the primary star is more luminous -- i.e. B/A/F/G dwarfs -- and more massive. The target names are denoted by the prefixes "KEBC" (northern EBs), "KEBS" (southern EBs), "KEBJ" (north-south joint field EBs), and "HTR-" (EBs provided by the HAT survey). For these targets, we recommend following these guidelines:
If no previous observations have pinned down the ingress/egress, then partial transits are useful, so long as there's sufficient data outside the predicted transit (~30 minutes or so). This is particularly true for the very long duration events. Some of the ephemerides are quite old -- particularly for the HAT EBs -- so reconnaissance observations are particularly useful for those. Partials will likely not be included in the final analyses.
If the timing has been confirmed, then high-precision, full transits are the most helpful in the final analyses. Precision is key, so filters that provide the highest signal-to-noise (likely i' or I) are preferred; however, bluer filters (V/g') can be useful for improving the precision on the effective temperature via the limb darkening, while redder (z') filters can improve the precision on the primary stellar density inferred from the ingress/egress duration.
Otherwise, standard transit reporting procedures apply.
After 14 years of observations, 17 years since the project conception, 26 planets discovered, and dozens of papers, the KELT transit search is ending. This transition has been long-expected, since the NASA TESS mission has revolutionized the discovery of transiting exoplanets. We will continue observations by both KELT telescopes for as long as practical, since there is so much more science to be done outside of transit discovery. Thank you to everyone who supported the KELT project!... Read More
We are honored to have received the Award of Distinction at the 25th Annual Communicator Awards from the Academy of Interactive and Visual Arts for this website, together with our web design partners at 3twenty9 Design, LLC.... Read More
(Phys.org)—An international team of astronomers reports the discovery of a new "hot Jupiter" exoplanet with a short orbital period of just three and a half days. The newly detected giant planet, designated KELT-20b, circles a rapidly rotating star known as HD 185603 (or KELT-20). The finding was presented in a paper published July 5 on arXiv.org.... Read More
Scientists have discovered a giant ringed gas planet which is likely caused by a mysterious stellar eclipse. The planet has 50 times mass of Jupiter and it is surrounded by a ring of dust. According to researchers from the University of Warwick, this planet is hurtling around a star more than 1000 light years away from Earth.... Read More