Three of 33 entries in a frozen TESS table lack notes on large period differences with Gaia DR3 SB1 solutions
We compare public TESS eclipse data with Gaia DR3 spectroscopic periods. We select all 33 entries marked Gaia SB1 in a frozen Table 3 of the TESS Ten Thousand Catalog. Unique Gaia matches are within 0.85 arcsec. Twenty-eight catalog periods agree within 0.041 percent. Five differ by more than 1 percent. Two entries already have period notes. The other three are TIC 71396049, TIC 72454940, and TIC 456893511. Fits to repeated eclipses in two sectors per source give mean recurrence periods of 0.878192, 1.323150, and 3.241822 days. These means assume the catalog cycle counts between sectors. The Gaia periods are longer by factors of 56.31, 10.20, and 7.91. Raw aperture flux confirms the events. TIC 71396049 is Gaia DR3 1110185721018656384, candidate 23 in a published neutron star search. An independent sector 20 pixel product shows primary and secondary eclipse loss near the bright target image. The fitted image shifts are 0.041 and 0.060 pixel. These results require a check of the relation between the short eclipse period and the longer spectroscopic period before a companion mass is inferred. They do not exclude a longer orbit, an unresolved source, or a neutron star in a multiple system. The original catalog discovered the eclipsing binaries. This work supplies the period audit, new event fits, an image check, and a six-sector timing test. At the fixed Gaia period for TIC 71396049, a descriptive timing fit improves scatter after a mean-period correction and sector offsets. A timing period near half the Gaia period fits almost as well. This result needs an orbit and eclipse-shape model. The package preserves data, source requests, code, figures, and reproduction steps.
TESS · Gaia DR3 · eclipsing binaries · spectroscopic binaries · period comparison · neutron star candidates · TIC 71396049 · TIC 72454940 · TIC 456893511 · reproducible astronomy
References
9- usesThe TESS Ten Thousand Catalog lists NGTS-23 b at about twice its planet period sci:sha256:33d4a7304b709c59a3770098ea5e8c092a895afb0f01cbcfa09c8846c2fea153
This prior SCI audit identified the TESS Ten Thousand tables as a useful source for period checks. Its saved Table 3 guided the first sample selection. We use a direct CDS snapshot for the final analysis.
- usesdoi:10.3847/1538-4365/ade2d8
Kostov and colleagues discovered the eclipsing binaries and supplied the catalog periods, eclipse epochs, durations, and notes used to define this sample.
- usesdoi:10.26093/cds/vizier/bb-8q-1j
The frozen CDS Table 3 defines the 33-source sample. The complete table and byte guide are preserved.
- usesdoi:10.17909/t9-r086-e880
The TESS Quick Look Pipeline data supply the public light curves.
- usesdoi:10.3847/2515-5172/ac2ef0
This paper describes the extended-mission Quick Look Pipeline light curves.
- usesdoi:10.1051/0004-6361/202243940
Gaia DR3 supplies source positions, neighbor data, and spectroscopic orbit values.
- doi:10.1051/0004-6361/202450600
This paper describes the Gaia DR3 SB1 processing chain.
- doi:10.3847/1538-4357/acf5e4
Schmelz and colleagues list Gaia DR3 1110185721018656384 as neutron star candidate 23. The present image and period checks constrain the interpretation of that source.
- doi:10.1093/mnras/stad909
Jayasinghe and colleagues used eclipsing binaries to test Gaia DR3 spectroscopic periods and compact object candidates. That prior work establishes the broader method.
Cited by
5 publicationsPublic catalog entries on Sciscape.
- TESS shows too few eclipses at the Gaia DR3 SB1 periods of 13-80 MJ companions of FGK dwarfs: at least 27% of these orbits at 0.5-20 d are not real (95%, stellar-control calibration)
A related comparison of TESS periods with Gaia DR3 SB1 periods.
- Fewer than 10 % of Gaia DR3 SB1 orbits with m2min < 0.08 Msun are real: TESS shows 14 transits where 404 are expected (P ≤ 16 d) and 65 ellipsoidal signals where 922 are expected (r = 1)
Earlier comparison of TESS eclipse periods with Gaia SB1 periods.
- usesA sine model leaves less scatter than a delay model for 267 TIC 71396049 eclipse times with Gaia and TRES data
We use six frozen QLP products, the inner ephemeris table, and parent timing values for a comparison. We fit new event times and test delay models.
- Tested sine models show over 96 percent reduction of the 7.5-day amplitude in final QLP data for TIC 12189121 in TESS sector 92
This study supplies method context for comparisons of Gaia and TESS periods. Its three flagged targets differ from ours.
- supportsGaia DR3 SB1 orbits predict eclipse times with errors 1.45 times too small and 2.8% gross outliers, in a test with 1582 Gaia and 416 TESS eclipsing binaries of period mostly below 10 d
That work compares TESS Ten Thousand Catalog periods with Gaia DR3 SB1 periods for 33 entries. We use the same TESS catalogue in a larger timing test and also find period mismatches.