Free Access

Table 1

Galactic absorption line measurements.

Ion Transition RGS1 1st RGS2 1st LETG/HRC-S LETG/ACIS-S
name λ0a (Å) EW (mÅ)b N σ c EW (mÅ)b N σ c EW (mÅ)b N σ c EW (mÅ)b N σ c

Ne ix 1s–2p 13.447 n/c 5.1 ± 1.5 3.4 8.0 ± 2.1 3.9 2.0 n/d
O vii 1s–3b 18.628 4.7 ± 1.5 3.2 3.0 ± 1.5 d 2.0d 2.6 ± 1.9 1.3 4.6 ± 1.5 3.0
O viii 1s–2p 18.967 9.0 ± 1.7 5.2 5.5 ± 1.6 5.7 7.8 ± 2.4 3.3 5.3 ± 1.7 3.2
18.972
O vii 1s–2p 21.602 15.4 ± 1.5 10.1 n/c 11.3 ± 2.6 4.3 10.0 ± 1.7 6.0
O v 1s–2p 22.370 3.0 ± 1.5 2.0 n/c 3.7 ± 2.3 1.6 1.1 n/d
O iv 1s–2p 2S 22.571 7.0 ± 2.8 2.5 n/c 8.2 ± 3.1 2.6 4.2 n/d
1s–2p 2P 22.741
1s–2p 2D 22.777
O i 1s–2p 23.510 17.3 ± 3.3 5.2 9.0 ± 2.0 4.5
23.511
N vi 1s–2p 28.788 4.5 ± 2.0d 2.3d 3.1 ± 1.6 1.9 5.0 ± 2.4 2.1 3.2 n/d
N i 1s–2p 31.286 10.6 ± 2.9 3.6 6.1 n/d
C vi 1s–2p 33.734 7.7 ± 2.6d 2.9d 8.8 ± 2.0 4.3 3.6 ± 2.6 1.4 6.1 n/d
33.740

Notes.

(b)

Equivalent width and total 1σ uncertainties (i.e. statistical uncertainties and systematic 1 mÅ) for detected lines. For the non-detections (n/d), the upper 1σ limit is given; n/c means that the line is not covered by the instrument.

(c)

Significance of the line detection in terms of 1σ uncertainty.

(d)

The problematic single channel has been omitted when deriving the values.

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.