The goal of the observing programme 0113.C-2186(A), PI A. Stavros, is to better understand the Low-Ionization Structures (LISs) commonly found in Planetary nebulae (PNe). This project uses X-shooter to obtain the first UV-to-NIR spectra from a sample of 12 LISs with different shapes and types in 9 PNe with a variety of morphologies, ages and stellar parameters.
First Data Release of the X-SHOOTER Survey of Low-Ionization Structures in Planetary Nebulae
Published: 14 Oct 2026
Observations were carried out with spectral resolving powers of R ≈ 3600, 5000, and 4300. Both long and short exposures were acquired to provide high signal-to-noise spectra while avoiding saturation of the brightest nebular emission lines. Observations were conducted on the nights of 28-29 June (East LIS) and 6-7 July (West LIS) of 2024. Further details on the observations, data reduction, and analysis are provided in the accompanying release documenation.
The released spectra are wavelength- and flux-calibrated and are intended for the spectroscopic study of the physical and chemical properties of the LISs of NGC 7009. They are available via the Archive Science Portal or Programmatically.
The DOI associated to this Phase3 data collection is doi.org/10.18727/archive/116.