No event passes a fixed flare search in 37 TOI-700 TESS sectors
We test the public 120 s TESS aperture flux of TOI-700 (TIC 150428135) in 37 sectors. The search covers 755.77 nominal days after quality and edge cuts. It includes 177.78 days in eight sectors beyond the 29-sector list in a 2025 study. No event passes the positive search or the negative control. The search requires three consecutive samples above three robust noise scales. A peak must also reach five scales. We add 100,000 artificial two-sided exponential events before the baseline fit. We test 25 pairs of peak amplitude and decay time. For a 5% aperture peak and a 10 min decay, the search recovers 99.7% of trials. The rate limit is 1.79 events per year. For four shapes with the same equivalent duration of 6.6 s, recovery ranges from 0.5% to 96.6%. The limits have at least 95% pointwise confidence under a constant Poisson rate for isolated events in processed flux. We assume independent event selection. The limits include simulation error. The tests do not measure signal loss in upstream TESS processing or constrain ultraviolet radiation. The package contains lossless source columns, source hashes, all trial results, code, and figures.
TOI-700 · TESS · stellar flares · injection recovery · rate limits · public data
References
5- usesdoi:10.1093/mnrasl/slac024
This study supplies prior work on artificial events and flare-rate limits for TESS planet hosts.
- supportsdoi:10.3847/2041-8213/acb599
The result extends the reported low optical flare activity of TOI-700 to more data with an explicit selection model.
- usesdoi:10.3847/1538-4357/ae1ddf
The corrected version gives the 29-sector TOI-700 list used to define the comparison epoch.
- doi:10.1093/rasti/rzag062
This related study uses a different flare search and energy model to estimate effects on transit visits.
- usesdoi:10.1093/biomet/26.4.404
We use the exact binomial lower confidence bound for artificial-event recovery.
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesTests of 37 TESS sectors do not detect a 1,010.56-day transit time wave in TOI-700 d or e
This earlier TOI-700 study is the source of the data collection on which the reused manifest is based.
- usesMasks 1.5 transit durations wide erase aligned box transits at 74.846914 days in 37 TOI-700 TESS sectors
We reuse exact TIME, SAP_FLUX, SAP_FLUX_ERR, and QUALITY columns from its 37 TESS sectors. We preserve its source manifest and check all reused rows against the original MAST FITS files. This work uses a new row selection and a new information calculation.
- A fixed TESS search gives an AU Mic event rate ratio of 1.21 for 2025 versus 2018–2020 under a Poisson model
This prior study tests a TESS flare search with specified injected shapes on a different star. We do not reuse its code or data.
- usesFixed central transit fits to 22 TOI-700 TESS events show no consistent extra signal at either aligned 74.846914-day clock
This work is the earlier source of the 37-sector TOI-700 source list and four native columns. We downloaded all original products, checked all reused values, and added corrected flux and error.