QLP depths are smaller than T16 depths at a 5.6962-day clock for nine TESS sector 1 targets
We test whether two public reductions give the same dip for a previously reported group of 12 TESS candidates with similar event times. Nine targets have sector 1 QLP v01 light curves at the tested URLs. We compare these with T16 on the same accepted exposures. The period is fixed at 5.6962 days. A local linear baseline gives the mean loss in a 2.641-hour box at three interior events. T16 TFA1 depths are 822 to 1348 parts per million (ppm), with a median of 1083 ppm. QLP KSPSAP depths are -313 to 135 ppm, with a median of 11 ppm. The median paired difference is 995 ppm. For each target, this difference exceeds all 206 differences at valid shifted control clocks. The controls overlap and do not give a formal false-alarm probability. QLP depths are also small before its final spline correction and in two other apertures. The difference remains with each target's catalog clock and duration. Image cutouts for two faint targets without QLP do not give a decisive test because of noise and nearby light. The result establishes a dependence on data reduction for the nine listed targets. It does not locate the cause or confirm or reject planets. The package contains source data, provenance, code, numerical checks, results, and figures.
TESS · T16 · QLP · planet candidates · transit depth · image subtraction · photometry · reproducible research
References
9- uses85 T16 candidate pairs more than two arcminutes apart pass a timing test on the same detector with nominal sector windows sci:sha256:04d423654f2bfe3bf78b34f02e0ec186a491348c1f33d4aee78c3f8bd35c809b
We use its 12-target sector 1 group, reference clock, group list, source table, six T16 files, and MIT FITS reader. We add QLP comparisons for nine group members, six further T16 curves, and two image cutouts.
- usesdoi:10.3847/1538-4365/ae5b6c
The revision 3 T16 table gives the candidate identifiers, coordinates, periods, epochs, and durations.
- usesdoi:10.1088/1538-3873/adad42
Describes the T16 light curves, image subtraction, catalog reference flux, apertures, and trend corrections.
- usesdoi:10.17909/8nxx-tw70
MAST T16 data collection supplies the twelve T16 source light curves.
- usesdoi:10.17909/t9-r086-e880
MAST QLP data collection supplies the nine QLP v01 source light curves.
- doi:10.3847/2515-5172/abca2e
- doi:10.3847/2515-5172/abca2d
- T16 TESS Year 1 catalog model depths are smaller than TOI depths (median ratio 1.21, 904 signals) and published planet depths (1.29, 168 planets), and the ratio increases with transit duration sci:sha256:3554451e64acfc9e8e4ad4cba99fae612113c6c140b6da92668292c55a818162
Related work compares T16 catalog model depths with TOI and published planet depths. Our fixed-clock comparison tests different reductions in one selected timing group.
- usesdoi:10.3847/1538-3881/ab3467
Describes the revised TESS Input Catalog. A MAST TIC query supplies positions and TESS magnitudes for the neighbor check at TIC 348959182.
Cited by
2 publicationsPublic catalog entries on Sciscape.
- TESS sectors 1-107 show no new transit of 659 RV planets in their RV-predicted windows; the same search finds 24 of 28 known transiting RV planets; the HD 44219 eclipses come from a neighbour star
- usesA background term based on geometric area cancels 89 to 103 percent of the three-event T16 loss in TIC 308453016 in sector 1
We use its fixed 5.6962-day clock and three interior event windows. Its QLP comparison and two faint image checks motivate this new background-column test in all 12 targets.