A search for box transits in TESS sector 98 does not confirm the DMPP-1 candidate at 3.2854 days
We test the proposed DMPP-1 transit with the TESS SPOC sector-98 light curve from November 2025 to January 2026. We search periods from 3.2779 to 3.2950 days, all phases, and box durations of 1.20, 1.44, and 2.16 hours. The largest formal depth-to-error ratio is 4.86. It is below the 8.21 threshold from 1,000 noise trials at each of three moving block lengths. Simple aperture data also fail their own noise test. At 3.2854 days and 1.44 hours, the search recovers 51 of 256 added 87 ppm box transits (19.9%). The first tested depths with at least 95% recovery in sector 98 are 175 ppm, 150 ppm, 125 ppm for the three durations. These are finite-grid recovery measurements in the archived corrected flux. They do not include losses inside the SPOC correction or physical transit shapes. The missing signal cannot rule out the reported shallow candidate or a changing dust signal. We preserve the input light curves, source hashes, search code, 9,000 noise trials, 15,360 injection trials, figures, and offline reproduction steps.
DMPP-1 · HD 38677 · TIC 66560666 · TESS sector 98 · transit recovery · correlated noise · public astronomical data
References
5- usesdoi:10.3847/2041-8213/ab8f2b
The reported candidate period, epoch, duration range, and reference depth define this test.
- usesdoi:10.17909/t9-nmc8-f686
We use the SPOC 120-second light curves for TIC 66560666 in sectors 6, 33, and 98. Exact product hashes and data releases are preserved.
- doi:10.1051/0004-6361/202243763
This earlier transit search includes the older DMPP-1 visits and searches the radial velocity planets.
- doi:10.1093/mnras/stag370
This later DMPP study reports no repeated transits and discusses weak residual signals in TESS data.
- usesdoi:10.1051/0004-6361:20020802
We use a box least squares search, as implemented by Astropy.
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