TESS PRF fits place two of six fixed 2026 events within 3 arcsec of HIP 67522 for all 18 baselines
This work tests the sources of six fixed 2026 HIP 67522 brightness events. SCI publication fa2981aa-730d-4905-9173-6d65f34b7100 supplies the event intervals. Public TESS images from sectors 101 and 102 are fitted with the official pixel response function (PRF). Each fit includes a background plane and a local star-field reference. The test uses 18 time baselines per event. Only events 2 and 3 have positive amplitudes and positions within 3 arcsec of HIP 67522 for all 18 baselines. Other events have large position changes or some fits with zero amplitude. A second test measures each peak against the light before the event. This test was added after image inspection. Event 2 has a short-test offset of 0.77 arcsec and a conditional 95% noise scatter of 3.24 arcsec. The short test gives weaker source constraints for event 3. Residual blocks, added sources, and nearby-time controls test noise and fit recovery. These tests use the adopted PRF. They do not include an independent calibration of flare color. A fit with zero amplitude has no measured position. The package includes the exact TESS cuts, input hashes, source code, fit outputs, figures, and reproduction steps. The results do not establish a planet cause or a probability for the physical host star.
HIP 67522 · TESS · difference images · source location · stellar flares · pixel response function · baseline sensitivity · reproducible research
References
10- usesSix strong flare candidates occur outside phases 0 to 0.2 in 2026 TESS data for HIP 67522 sci:sha256:bf1c730b9dcd41376092526c79e225edda341f51c2eac90c56ef15e74341814d
This work uses all six new 2026 event intervals from its event table, with no new event search. It adds pixel source fits and controls.
- doi:10.1038/s41586-025-09236-z
Earlier TESS and CHEOPS flare-phase results motivate source checks for later HIP 67522 events. This work does not repeat that phase test.
- doi:10.3847/1538-4357/ae6446
Its separate flare search shows why sample and baseline choices matter for phase tests.
- doi:10.48550/arXiv.2606.18045
Earlier-sector observations show strong rotational light changes. They motivate the time-baseline checks here.
- doi:10.48550/arXiv.2609.35979
This earlier transit-timing study used TESS sectors 101 and 102. The data have been studied before; this work adds source fits for six fixed event intervals.
- usesdoi:10.1086/671767
The source tests use the established difference-image PRF method and a local reference position.
- doi:10.1093/mnras/stad3286
This TESS centroid study gives context for host-source tests. This work does not use its host probability model.
- usesdoi:10.1051/0004-6361/202243940
Gaia DR3 positions and proper motions define reference-field components and known positions for added-source tests. The catalog input is fetched externally.
- doi:10.1051/0004-6361/201629272
This work credits the Gaia mission and DPAC data processing.
- usesdoi:10.1117/1.JATIS.1.1.014003
This work uses public TESS target pixel data from MAST.
Cited by
7 publicationsPublic catalog entries on Sciscape.
- usesTESS reference fits put DS Tuc A transits nearer B in 13 of 235 eligible tests
The MIT PRF software and local source-fitting workflow originate in this study and its cited software. They are inherited through the source package.
- usesTwo rotation harmonics give the lowest gap prediction error among 13 models in two HIP 67522 TESS sectors
Spatial evidence for the 2026 event, specifically event 2. No source fit is repeated here.
- One fixed group raises the orbital scan tail for the 12 TESS flares of HIP 67522
Its catalog record describes a source-position test of later 2026 events. The preserved prior-work search records include that abstract. Those events are outside this study.
- A 5-second light integral cut retains duration bias for model flares in five HIP 67522 TESS sectors
Its pixel source fits limit physical interpretation of the six prior strong aperture events. We perform no new source fit.
- usesTransit-referenced TESS fits place two of eight DS Tuc events nearer B for all 24 tested models
It supplied the MIT PRF code and informed the local difference-image workflow. This study adds a transit reference and DS Tuc measurements.
- A trigger with two samples changes the HIP 67522 phase count from zero of seven to three of eleven at a 0.3% peak cut in TESS sectors 101 and 102
This source study limits physical interpretation of the shared aperture events.
- Three of twelve selected HIP 67522 aperture pulses occur at orbital phases 0 to 0.2 in TESS sectors 101 and 102
This source study gives image-position limits for the six shared events. Our qualitative images do not replace its source tests.