The atmosphere of HD 209458b seen with ESPRESSO - No detectable planetary absorptions at high resolution

Free Access

Table 2

Observing log of the HD 209458b transit observations.

Night	Telescope	Date of	Start	End	Airmass^(a)	T_exp	N_obs	S∕N ^(b)
		observation	[UT]	[UT]	change	[s]		Na I order
1	VLT-UT3	2019-07-20	03:43	09:30	2.23–1.38–1.89	175	89	122-261
2	VLT-UT3	2019-09-11	00:35	06:06	2.00–1.38–1.93	175	85	132-228

Notes. ^(a) Airmass change during the observation. ^(b)Minimum and maximum S/N for each night, calculated in the Na I echelle order.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.