STIS Hα and Hβ low-resolution (dashed, blue) and medium-resolution (gray lines) observations (labeled with medium-resolution grating/central wavelength in Å). Because of uncertainty in the flux calibration, the medium-resolution data are normalized to the low-resolution flux. The flux around Hβ in the top plot is multiplied by a factor of 0.35. The red lines in the upper two plots are the medium-resolution (R ≈ 6000) spectra degraded to the low resolution (R ≈ 500) and agree with the low resolution (blue dash) within the uncertainty of the R = 500 resolution. The lower two plots are shifted down by 0.035 and 0.07 × 10-13 flux units, respectively. In the lowest plot, the model is overplotted in red after smoothing to the medium resolution. While the model Hα absorption is somewhat too weak, the central emission agrees with the observation within the uncertainty of the resolution (insert).
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.