The two reported TESS dips of HD 11506 match the target image under local motion models
We tested the source of two reported brightness dips of HD 11506 in TESS sectors 30 and 107. A prior study linked these dips to a possible 25.896-day planet signal but left the source uncertain. We fit a fixed 3.23-hour dip together with local time and pointing terms in public two-minute pixel data. A model based on the measured target image places the lost light 0.034 and 0.032 pixel from the target image. The nearest resolved Gaia DR3 source is 0.770 and 0.751 pixel away. The target gives a lower spatial error score than this source in both sectors. All 16 tested model settings per sector that include motion terms retain the target match. An archived TESS pixel response model gives the same source interpretation. Conditional residual tests give 95th-percentile position scatter radii of 0.134 to 0.143 pixel and 0.087 to 0.097 pixel. Artificial target and neighbor signals are separated in all 13 accepted control windows. These finite controls overlap and do not give source probabilities. The result assumes a linear pixel response and local image models. It supports the target over this resolved source, but does not confirm a planet or exclude an unresolved star or an instrumental cause. The package preserves lossless data extracts, source hashes, code, all tests, figures, and reproduction instructions.
HD 11506 · TIC 266680498 · TESS · transit source · difference image · pixel response function · motion · Gaia DR3 · reproducible research
References
6- usesTESS sector 107 shows second transits of two single-transit CTOIs; the 9 Earth-radius candidate TIC 60479865 has 39 possible periods, 95 % of the probability at 27.6-89.9 d (eccentric orbit prior) sci:sha256:a6d530eab04d82adc993e269c473e0c7b72b9406517b56375d81d2bc60018ea1
We use its two event times and 3.23-hour duration for HD 11506. We add a source test with public pixel data.
- Public velocities support a 25.896-day signal in HD 11506 under a two-planet model with a trend and independent noise sci:sha256:301130a5ac782afab5dd67e9f62edaf0853da5bd1d13d17dfcdc8fdb066bb619
Its conditional 25.896-day velocity signal motivates the source test. We do not use or fit its velocity data.
- usesTESS difference images with motion terms support TOI-1892 over its nearest Gaia neighbor for three 29.35 d dips sci:sha256:3d83f7f5e483dd3c0dff43706c8ffa484b2e0bc53e3e9db2bfdab3bb789020df
Its source tests with local motion terms inform the method and limits. We wrote new code and test different events.
- usesdoi:10.1086/671767
This work describes established difference-image and source-fit methods and their limits.
- usesdoi:10.1117/12.2233418
We use public TESS SPOC target pixel and light curve products.
- usesdoi:10.1051/0004-6361/202243940
We use Gaia DR3 positions and proper motions to locate the nearest resolved source.
Cited by
3 publicationsPublic catalog entries on Sciscape.
- usesA finite noise mixture supports a 25.896-day HD 11506 signal in 207 public velocities under a local orbit model
Its image tests give context for the two reported TESS dips. We do not repeat those tests.
- Coherent noise at 25.896 days lowers twice the log likelihood gain from 41.05 to 21.80 in a test of 207 HD 11506 velocities
This image test supplies source context for the two dips. It does not identify the cause of the RV signal.
- Public HD 11506 velocities support a fixed 25.896-day shape under four tested noise settings
Its image tests favor the target over the nearest resolved Gaia source under local motion models. We use this context but no pixel data or fitted source measurements.