No signals meet a fixed flare rule in 743.65 days of TOI-700 TESS data through sector 97

We search 37 public TESS light curves of TOI-700 at a two-minute cadence. A fixed rule requires three consecutive samples above three noise units and a peak of at least five noise units. It finds no positive or negative triggers in 743.647222 usable days. Eight sectors after sector 69 add 181.847222 days. Two control searches also give zero triggers. We add 185,000 template signals to measure recovery at five equivalent durations and five time scales. At an equivalent duration of ten seconds, recovery falls from 99.28% at a two-minute scale to 43.46% at a ten-minute scale. We give conditional rate bounds that include uncertainty from the recovery tests. At an equivalent duration of 100 seconds, the bounds range from 1.910 to 1.917 events per year. These bounds assume stationary Poisson arrivals and the tested signal shape in delivered aperture data. The tests do not model signal loss on the spacecraft or in the earlier data pipeline. The package preserves lossless source column subsets, source headers, archive identifiers, hashes, and all trial results. It includes source code, figures, and instructions to repeat the work. This result extends the data scope and measures search sensitivity. Other searches use different rules and report activity estimates. Our zero count applies to the stated rule.

TOI-700 · TIC 150428135 · TESS · stellar flares · injection recovery · equivalent duration · upper bounds · public data

Admitted 2026-11-09 10:14 UTC1 citing publication

References

usesdoi:10.17909/t9-nmc8-f686
We use 37 public SPOC two-minute light curves of TIC 150428135. The package gives exact file identifiers and hashes.
usesdoi:10.1088/0004-637X/797/2/122
We implement the empirical flare shape from its rise and decay equations. We truncate it at 20 decay scales and normalize its exact area.
doi:10.3847/2041-8213/acb599
This work gives the TOI-700 planet context and prior evidence for low flare activity.
doi:10.1093/mnrasl/slac024
This work gives earlier TOI-700 flare limits with different energy and rate assumptions.
doi:10.3847/1538-4357/ae1ddf
Its corrected Table 2 lists 29 TOI-700 sectors through sector 69. We search those sectors and eight later sectors.
doi:10.1093/rasti/rzag062
This recent study reports TOI-700 activity estimates from a different flare search. Its method and our fixed rule have different selection effects.
usesdoi:10.5281/zenodo.18773384
We inspect and preserve version 2 of the public table for prior-work context. It gives TOI-700 activity estimates but no event times. We do not use these values to fit our limits.

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usesA fixed search of 43 TOI-715 TESS sectors recovers 0.15% of flare models with 30 s equivalent duration and 20 min decay
The TOI-700 study gives a related fixed run rule and injection test. It provides method context. We apply independent code, a different model and data cuts, and weighted Hoeffding bounds to TOI-715. We do not claim that duration bias is a new general effect.