Tecnical details
- At present, the IACOB spectroscopic database includes spectra gathered with two different instruments:
- the FIES spectrograph (Telting et al. 2014) attached to the 2.56-m Nordic Optical Telescope, and
- the HERMES spectrograph (Rasking et al. 2011) attached to the 1.2-m Mercator telescope.
- Observations started in November 2008 and have continued regularly since then (last update May 2020).
- Both instruments provide a complete wavelenght coverage between 3800 and 7000 A (9000 A for the case of all HERMES spectra and those NOT spectra obtained since May 2017).
- The associated resolving power (R) of the spectra is 25000/46000/65000 (FIES) and 85000 (HERMES).
- By default, all spectra in the IACOB spectroscopic database are reduced using the corresponding available pipelines (FIEStool and HERMES-DRS, respectively).
- All spectra are made available in fits format. Each file includes:
- the original header plus some extra entries at the end of the header indincated in the form I-EXTRA_KEYWORD
- the original waveleght calibrated, blaze corrected and merged spectrum (as provided by the corresponding pipelines)
- a normalized spectrum (using own routines developed in IDL)
- The spectra are not corrected from barycentric velocity; however, a homogeneously computed barycentric velocity can be found in the header (keyword I-VBAR)
Information on Data Releases
DR1 (January 2015): This data release, which includes 681 FIES spectra of 87 stars compiled during 4+4 nights in November 2008 and November 2009, mainly refers to the spectroscopic time-series of a sample of 13 O9.5 - B8 Supergiants presented in
Simón-Díaz et al. (2010)
, and the spectra of 13 narrow line early-B dwarfs in the Orion OB1 star-forming region analyzed in Simón-Díaz et al.
(2010)
and
Nieva & Simón-Díaz (2011)
.
DR2 (June 2020): This data release includes 552 FIES and HERMES spectra for more than 240 late- and mid-B stars with luminosity classes V (dwarfs), IV (subgiants) and III (giants) observed in the framework of the IACOB project between January 2010 and May 2020. Part of these observations were considered for the investigation of the macroturbulent broadening in the whole O and B star domain, presented in Simón-Díaz et al.
(2017;
see also Godart et al.
2017
and Grassitelli et al.
2015
).
DR3 (envisaged for Spring 2021): This data release will include the best S/N spectra of all stars considered for the PhD thesis work of G. Holgado (
Spectroscopic and physical characterization of the Galactic O-type stars targeted by the IACOB and OWN surveys
– ULL/IAC, Spain, Jan. 2019). More information about the complete dataset utilized by G. Holgado in his PhD thesis – comprising 2900 FIES, HERMES and FEROS spectra of 415 Galactic O-type stars –, as well as some results obtained up to date from its scientific exploitation can be found in Holgado et al. (
2018
,
2020
).
2566 Stars
16986 Spectra