The young exoplanetary system TOI-4562: Confirming the presence of a third body in the system

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Volume 690 (October 2024)

A&A, 690 (2024) L7

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Table 1.

Midtransit instances for TOI-4562 b.

Cycle	Observed	Observatory	(O − C)_HEI23	Calculated	TTV
	BJD [days]		[min]	BJD [days]	[min]
0	$2, 458, 456 . 87916_{- 0.00099}^{+ 0.00112}$ $2,458,456.87916^{+0.00112}_{-0.00099}$	TESS	+10.7712	2, 458, 456.900401	−30.7440
1	$2, 458, 681 . 98020_{- 0.00088}^{+ 0.00092}$ $2,458,681.98020^{+0.00092}_{-0.00088}$	TESS	−13.3776	2, 458, 682.006969	−38.4624
3	$2, 459, 132 . 21623_{- 0.00111}^{+ 0.00110}$ $2,459,132.21623^{+0.00110}_{-0.00111}$	TESS	−12.7872	2, 459, 132.220105	−5.0112
4	$2, 459, 357 . 34510_{- 0.00095}^{+ 0.00096}$ $2,459,357.34510^{+0.00096}_{-0.00095}$	TESS	+3.1392	2, 459, 357.326673	+27.3456
5	$2, 459, 582 . 46321_{- 0.00142}^{+ 0.00142}$ $2,459,582.46321^{+0.00142}_{-0.00142}$	LCOGT*	+3.5712	2, 459, 582.433241	+44.2080
7	$2, 460, 032 . 64015_{- 0.00111}^{+ 0.00113}$ $2,460,032.64015^{+0.00113}_{-0.00111}$	TESS	−80.9280	2, 460, 032.646377	−7.4304
8	$2, 460, 257 . 73350_{- 0.00385}^{+ 0.00369}$ $2,460,257.73350^{+0.00369}_{-0.00385}$	OPD/LNA	−116.1504	2, 460, 257.752945	−26.2224

Notes. The cycles are numbered according to T₀(BJD) = 2458456 days. The second column shows the observed midtransits for TOI-4562 b for the seven cycles used in our analysis. For the LCOGT observations, the midtransit is from HEI23. The remaining midtransits are calculated using a multiple-transit simultaneous-fit procedure (see Section 4). Column four presents the O − C according to the HEI23 ephemeris, while columns five and six present the calculated midtransit and the respective TTVs with respect to the ephemeris obtained in this work.

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