Sentences with phrase «candidates were false positives»

Not exact matches

Re: Lincoln, of course a system that filters out definitely - bad candidates will also filter out some possibly - good ones, i.e. have false positives.

The standard approach has been to take additional observations for each candidate to rule out possible false positive scenarios, or to detect the planet with a second technique.

But an alternative is to make statistical calculations for the probability of false positives among these thousands of exoplanet candidates.

The Vespa technique works by comparing the details of a transiting planet signal — specifically its duration, depth and shape — against simulated planetary and false positive signals to indicate the type of signal the candidate most likely is.

«We know small planets are common, so if Kepler sees a small - looking planet candidate and it passes the strict internal vetting, it's more likely to be a planet than a false positive because it's hard to mimic that signal with anything else.»

The data on the numerous candidates are somewhat preliminary and require validation, but a new analysis by a pair of astrophysicists at the California Institute of Technology suggests that the percentage of false positives among Kepler's candidate planets may be less than 10 percent.

Classifications of the type of false positive (indicated by the lower lines in Fig. 2) could be derived only for candidates resolved from follow - up observations.

The high - amplitude region of depths over 5 % is not covered by candidates in the follow - up program, because the eclipse depth as such identifies these cases as false positives in planet finding, excluding them automatically from follow - up observations.

Because of these false positives, a sequence of tests - as originally outlined by Alonso et al. (2004)- is employed, beginning with detailed revisions of the detection light - curves, and continuing for surviving candidates with follow - up observations, to either reject them from the list of planetary candidates or to verify their planetary nature.

False positives in the multi - planet systems are identified and removed, leaving behind a residual population of candidate multi-planet transiting systems expected to have a false - positive rate less thanFalse positives in the multi - planet systems are identified and removed, leaving behind a residual population of candidate multi-planet transiting systems expected to have a false - positive rate less thanfalse - positive rate less than 1 %.

Abstract: The Kepler mission has revolutionized our understanding of exoplanets, but some of the planet candidates identified by Kepler may actually be astrophysical false positives or planets whose transit depths are diluted by the presence of another star.

Adaptive optics images made with ARIES at the MMT of 87 Kepler Objects of Interest place limits on the presence of fainter stars in or near the Kepler... ▽ More The Kepler mission has revolutionized our understanding of exoplanets, but some of the planet candidates identified by Kepler may actually be astrophysical false positives or planets whose transit depths are diluted by the presence of another star.

Comparing single - planet candidate KOIs to multi-planet candidate KOIs, we find an observed false positive fraction due to contamination of 16 % and 2.4 % respectively, bolstering the existing evidence that multi-planet KOIs are significantly less likely to be false positives.

Nearly five thousand periodic transit - like signals are vetted against astrophysical and instrumental false positives yielding 1,091 viable new planet candidates, bringing the total count up to over 2,300.

These observations are dedicated to estimating the false positive rate (FPR) amongst the Kepler candidates.

Binary stars provide the primary source of false positives among Kepler planet candidates, implying that false positives should be nearly randomly - distributed among Kepler targets.

A suite of diagnostic tests is performed on all candidates to aid in discrimination between genuine transiting planets and instrumental or astrophysical false positives.

A promising exoplanet candidate w... ▽ More As is the case for all techniques involved in the research for exoplanets, direct imaging has to take into account the probability of so - called astrophysical false positives, which are phenomena that mimic the signature of objects we are seeking.

The sample number was progressively reduced to 129 KOIs on 125 target stars, by removing already known false positives, stars too faint to be observed by SOPHIE, and candidates with orbits of more than 400 days, to insure that at least 3 transits could be observed.

The Kepler science team has long predicted that the «false positive» rate for these very large radii planets would be high — a projected 30 - 40 percent rate for candidates larger than Jupiter versus less than 10 percent false positive rate for candidates smaller than Jupiter.

Before we can use James Webb to really observe candidate exoplanets and study their atmospheres, we first need to confirm the planets are real — that what we think are planets are not false positives caused, for instance, by stellar activity.