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astro-ph.SR · Solar and Stellar Astrophysicsastro-ph.EP · Earth and Planetary Astrophysicsastro-ph.IM · Instrumentation and Methods for Astrophysics

A fixed search of 43 TOI-715 TESS sectors recovers 0.15% of flare models with 30 s equivalent duration and 20 min decay

We test flare recovery in 43 public 120 s TESS SPOC light curves of TOI-715. The first 24 sectors and 19 later sectors give 730.22 usable days after fixed quality, transit, gap, and edge cuts. A fixed rule needs three consecutive residuals above three noise units and a peak above five noise units. It finds zero positive runs and zero negative runs. We test 86,000 added signals with exact 120 s exposure integration. Each model has a 2 min linear rise and an exponential decay. A primary grid tests four peak fractions and four decay times. A secondary grid holds equivalent duration at 30 s. At that equal signal, exposure-weighted recovery is 76.49%, 90.51%, 27.52%, and 0.15% for decay times of 2, 5, 10, and 20 min. Pointwise 95% weighted Hoeffding intervals are 88.36%-92.67% at 5 min and 0%-2.30% at 20 min. The two data groups show the same broad recovery pattern. Under a stationary Poisson model for isolated signals in delivered data, the 10% peak model with 10 min decay has a conditional 95% rate upper bound of 1.887 events per year. The 30 s model with 20 min decay gives no finite bound from this procedure. The trials hold quality flags fixed and do not measure signal loss in the spacecraft or upstream pipeline. The zero count cannot establish a low rate for every flare shape. The package supplies a lossless public input subset, exact source checks, all trial records, code, figures, plans, and reproduction instructions.

TOI-715 · TIC 271971130 · TESS · stellar flares · signal recovery · equivalent duration · public astronomical data · reproducible research

Admitted 3 citing publications

References

7
  1. usesTen TESS sectors from December 2024 to January 2026 do not show the second TOI-715 signal at its reported times sci:sha256:f0c29ddadd3b341dc88e27dcf895accbe1d092efa5809e55380fd4149f98345b

    We reuse the lossless subset of 43 public TOI-715 light curves, selected headers, and source records. We verified the signed publication and checked all source files independently. The flare code and results are new.

  2. usesdoi:10.17909/t9-nmc8-f686

    We use 43 NASA TESS SPOC light curves at a 120 s cadence for TIC 271971130. The package records exact names, archive URLs, and hashes.

  3. usesdoi:10.1093/mnras/stad1439

    We use reported periods and epochs for transit masks. The paper reports flares in the first 24 sectors. Our fixed rule has a different selection and does not test that event count.

  4. usesNo signals meet a fixed flare rule in 743.65 days of TOI-700 TESS data through sector 97 sci:sha256:0f27daee2ee393da8a76b6d4ecb9a861fc1f5385cee63c3007064737bbfe66b9

    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.

  5. doi:10.1051/0004-6361/202452489

    This study gives prior work on TESS flare morphology and catalog selection. Our contribution supplies recovery tests for a stated TOI-715 data set and rule.

  6. usesdoi:10.26093/cds/vizier.36940161

    We checked table 3 for TIC 271971130 and preserve the response with no data rows. This is a catalog match check, not evidence of no stellar flares.

  7. usesdoi:10.1080/01621459.1963.10500830

    We use the bounded-variable inequality to give conservative pointwise uncertainty for exposure-weighted recovery with unequal sector probabilities.

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