Twelve TESS sectors cover 81.2 to 82.1 percent of phases for circular HD 216520 c models at 154.43 days, 2 Earth radii and impact parameters 0, 0.5 and 0.8
We tested usable transit phases for HD 216520 c in twelve individual sector TESS light curves with 120-second samples. At 154.43 days, 81.2 to 82.1 percent of phases pass a fixed sample-count rule. The first three sectors cover 42.7 to 43.2 percent. These values use circular models with 2 Earth radii and impact parameters 0, 0.5 and 0.8. Thus 17.9 to 18.8 percent remain outside the rule. We preserve continuous phase intervals at 101 tested periods from 153.11 to 155.75 days. A separate grid has 18,432 corrected-flux trials with four radii, three periods, three impact parameters and 512 phases. Recovery tests templates near each known inserted event. Every eligible model with 2 or 3 Earth radii reaches the preset fitted score of 8. Models with one Earth radius have lower recovery. An aperture-flux control adds 2048 trials. Five dip groups in the original corrected flux pass the threshold. No other eligible event reaches that threshold at the tested periods; some predicted repeats have no usable data. The cause of these features is not known. No new planet or transit is confirmed. The fractions are conditional sensitivity results, not planet probabilities or confidence limits. The tests use fixed stellar values and limb darkening and add signals after mission processing. This work extends the earlier three-sector transit study. The package preserves source FITS files, provenance, complete scores and trials, exact intervals, figures, code and reproduction instructions.
HD 216520 c · TIC 264899051 · TESS · transit phase coverage · injection recovery · single transit · public astronomical data
References
6- usesdoi:10.3847/1538-3881/abc2d0
This discovery study supplies the stellar values, period and earlier three-sector transit search and injection tests. We extend the source set by nine sectors and use a different full-phase test.
- usesdoi:10.17909/t9-nmc8-f686
This TESS collection supplies the twelve 120-second SPOC light curves. Exact source bytes, URLs and hashes are preserved.
- usesThree TESS sectors cover 35.0 to 37.4 percent of transit phases for circular HD 48948 d models with 2 Earth radii and impact parameters 0 and 0.8 at four tested periods sci:sha256:9870efe9146d064ecdc8ae7713a03c32fe9bc0dbf9263ab9da1c6259046f36d5
We adapt its MIT source for local quadratic fits, stellar annulus models, injected-signal response, source checks and continuous interval coverage. We retain its license notice.
- usesNo transit template reaches a score of 8 near HD 48948 b's period in TESS sectors 20, 60, and 73 sci:sha256:7d32ac50b3d7e35d7c80710824f2a3fe901763d34276ef395ac7b376c6e3d785
The adapted code inherits weighted projection, stellar annulus and source-integrity methods from this upstream MIT code. This is upstream attribution; we did not use its target data.
- Five TESS sectors leave 6.3% of phases unobserved for a circular central GJ 887 d transit model at 50.77 days and 2.29 Earth radii sci:sha256:a1add1aa4b929c55e8d7e1fb161f6b7e693d94b0841bcfd079f26bfdfdfdeca7
This related study shows how later TESS sectors can reduce phase gaps. Its numerical inputs and code are not used here.
- doi:10.1051/0004-6361/202243763
This related TESS transit survey tests radial velocity planets below 30 days. HD 216520 c lies outside its period scope.
Cited by
1 publicationPublic catalog entries on Sciscape.
- usesTwelve TESS sectors cover 100 percent of orbital phase for circular HD 216520 b models with 2 Earth radii at 201 tested periods near 35.45 days and three impact parameters
This study supplies the verified source products, MAST provenance and MIT local-fit code. It tests planet c. The present work tests repeated events for planet b and adds continuous repeated-event coverage and new inserted-signal trials.