Over 1300 new periodic signals detected in the first year of $it{TESS}$ with the ${tt weirddetector}$. (arXiv:2009.10232v2 [astro-ph.EP] UPDATED)

Over 1300 new periodic signals detected in the first year of $it{TESS}$ with the ${tt weirddetector}$. (arXiv:2009.10232v2 [astro-ph.EP] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Chakraborty_J/0/1/0/all/0/1">Joheen Chakraborty</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wheeler_A/0/1/0/all/0/1">Adam Wheeler</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kipping_D/0/1/0/all/0/1">David Kipping</a>

We apply the ${tt weirddetector}$, a nonparametric signal detection
algorithm based on phase dispersion minimization, in a search for low
duty-cycle periodic signals in the Transiting Exoplanet Survey Satellite (${it
TESS}$) photometry. Our approach, in contrast to commonly used model-based
approaches specifically for flagging transits, eclipsing binaries, or other
similarly periodic events, makes minimal assumptions about the shape of a
periodic signal, with the goal of finding “weird” signals of unexpected or
arbitrary shape. In total, 248,301 ${it TESS}$ sources from the first-year
Southern sky survey are run through the ${tt weirddetector}$, of which we
manually inspect the top 21,500 for periodicity. To minimize false-positives,
we here only report on the upper decile in terms of signal score, a sample for
which we obtain 97% recall of ${it TESS}$ eclipsing binaries and 62% of the
TOIs. In our sample, we find 1333 previously unreported periodic signals, for
which we make a first-pass assignment that 176 are ultra-short periods ($<0.3$
d), 1102 are likely eclipsing binaries, 32 appear planet-like, and 23 are
miscellaneous signals.

We apply the ${tt weirddetector}$, a nonparametric signal detection
algorithm based on phase dispersion minimization, in a search for low
duty-cycle periodic signals in the Transiting Exoplanet Survey Satellite (${it
TESS}$) photometry. Our approach, in contrast to commonly used model-based
approaches specifically for flagging transits, eclipsing binaries, or other
similarly periodic events, makes minimal assumptions about the shape of a
periodic signal, with the goal of finding “weird” signals of unexpected or
arbitrary shape. In total, 248,301 ${it TESS}$ sources from the first-year
Southern sky survey are run through the ${tt weirddetector}$, of which we
manually inspect the top 21,500 for periodicity. To minimize false-positives,
we here only report on the upper decile in terms of signal score, a sample for
which we obtain 97% recall of ${it TESS}$ eclipsing binaries and 62% of the
TOIs. In our sample, we find 1333 previously unreported periodic signals, for
which we make a first-pass assignment that 176 are ultra-short periods ($<0.3$
d), 1102 are likely eclipsing binaries, 32 appear planet-like, and 23 are
miscellaneous signals.

http://arxiv.org/icons/sfx.gif