TESS sectors 14 and 40 place the main 8.9077-day eclipse away from TIC 219095763
We test the source position of the main eclipse near the planet candidate TIC 219095763. A complete 1:1 timing screen compares 181 newly listed entries from the Lastovka et al. ULTRASAT-field catalog with 1,376 threshold crossing events. The screen gives 16 distinct pairs that involve 20 new candidate stars within 120 arcseconds. These flags do not measure a false-positive rate. We select one case for a TESS image test. Six eclipse windows in sectors 14 and 40 give fitted positions 52.65 and 51.24 arcseconds from TIC 219095763, using the cutout sky maps. The nearest catalog star is TIC 219095759, at offsets of 2.05 and 0.66 arcsecond. Its catalog false-positive entry has the same 8.9077-day period and a much deeper eclipse. All 54 time-window and image-region fits keep the source 50.90 to 52.74 arcseconds from the candidate. Use of the candidate's own ephemeris gives the same source region. Thus the main loss of light in these two sectors is off the candidate. The images do not exclude a smaller transit on the candidate or uniquely resolve the physical eclipse source among close stars. A requested sector 26 cutout has only detector calibration columns and is excluded before source fitting. The package includes the input tables and cutouts, data provenance, code, all measured results, figures, and reproduction instructions.
TESS · ULTRASAT · eclipse source · difference imaging · ephemeris matching · detector coverage · TIC 219095763
References
7- usesdoi:10.48550/arXiv.2610.28518
We use its published candidate and event parameters and test the source position for one of its candidates. We do not assess its validated planets.
- usesdoi:10.5281/zenodo.23504163
The unchanged candidate and TCE tables supply the complete timing screen and the two tested ephemerides.
- usesCatalog light loss estimates agree within a factor of 1.2 for 41 of 50 TOI pairs matched near BJD 2460000 sci:sha256:c649ef53d8c7493c75c894ce7b14411564d02c45946456d238999a95f1cf6979
We adapt its finite-window phase-drift score to the ULTRASAT-field tables and add a pixel source test.
- uses85 T16 candidate pairs more than two arcminutes apart pass a timing test on the same detector with nominal sector windows sci:sha256:04d423654f2bfe3bf78b34f02e0ec186a491348c1f33d4aee78c3f8bd35c809b
Its tests show why a timing match alone is not a source position. We use that distinction in an independent catalog and image audit.
- usesdoi:10.1088/0004-6256/147/5/119
Ephemeris matching is the established basis of the catalog screen.
- usesdoi:10.1086/671767
Difference images provide the established source-location method. Our descriptive Gaussian is not its calibrated pixel response model.
- usesdoi:10.3847/1538-3881/ab3467
We use local TESS Input Catalog positions, magnitudes, and proper motions from the preserved MAST cone response.
Cited by
2 publicationsPublic catalog entries on Sciscape.
- usesImage fits in TESS sectors 14 and 40 place two light losses closest to TIC 219752664 and TIC 356014480
We adapt its MIT table reader and image utilities, and build on its catalog timing screen. We add source-position tests for two different fields.
- usesTESS sectors 14, 21 and 41 place the main 3.13-day light loss near TIC 142374123
We use its published timing-match ledger to select this pair. We add image positions for TIC 142374122 and TIC 142374123 in three TESS sectors.