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The X-shooter Spectral Library (XSL): Data Release 3



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Sánchez Blázquez, P. and otros, ... (2022) The X-shooter Spectral Library (XSL): Data Release 3. Astronomy & Astrophysics, 660 . ISSN 0004-6361

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Official URL: http://dx.doi.org/10.1051/0004-6361/202142388


We present the third data release (DR3) of the X-shooter Spectral Library (XSL). This moderate-to-high resolution, near-ultraviolet-to-near-infrared (350-2480 nm, R similar to 10 000) spectral library is composed of 830 stellar spectra of 683 stars. DR3 improves upon the previous data release by providing the combined de-reddened spectra of the three X-shooter segments over the full 350-2480 nm wavelength range. It also includes additional 20 M-dwarf spectra from the ESO archive. We provide detailed comparisons between this library and Gaia EDR3, MILES, NGSL, CaT library, and (E-)IRTF. The normalised rms deviation is better than D = 0.05 or 5% for the majority of spectra in common between MILES (144 spectra of 180), NGSL (112/116), and (E-)IRTF (55/77) libraries. Comparing synthetic colours of those spectra reveals only negligible offsets and small rms scatter, such as the median offset(rms) 0.001 +/- 0.040 mag in the (box1 - box2) colour of the UVB arm, -0.004 +/- 0.028 mag in (box3 - box4) of the VIS arm, and -0.001 +/- 0.045 mag in (box2 - box3) colour between the UVB and VIS arms, when comparing stars in common with MILES. We also find an excellent agreement between the Gaia published (BP - RP) colours and those measured from the XSL DR3 spectra, with a zero median offset and an rms scatter of 0.037 mag for 449 non-variable stars. The unmatched characteristics of this library, which combine a relatively high resolution, a large number of stars, and an extended wavelength coverage, will help us to bridge the gap between the optical and the near-IR studies of intermediate and old stellar populations, and to probe low-mass stellar systems.

Item Type:Article
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© ESO 2022. Artículo firmado por 15 autores. A.A. acknowledges funding from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme (grant agreement No. 834148). R.F.P. acknowledges financial support from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 721463 to the SUNDIAL ITN network. A.V. and J.F-B acknowledge support through the RAVET project by the grant PID2019-107427GB-C32 from the Spanish Ministry of Science, Innovation and Universities (MCIU), and through the IAC project TRACES which is partially supported through the state budget and the regional budget of the Consejería de Economía, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community. P.C. acknowledges support from Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) under grant 310041/2018-0 and from Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) process number 2018/05392-8. P.S-B. acknowledges the financial support from the Spanish National Plan for Scientific and Technical Research and Innovation, through the grant PID2019107427GB-C31. L.M. thanks FAPESP (grant 2018/26381-4) and CNPQ (grant 306359/2018-9) for partial funding of this research.

Uncontrolled Keywords:Infrared caii triplet; Newton-telescope library; Absorption-line spectra; Empirical calibration; Stellar library; Carbon stars; Mu-m; Magellanic clouds; Milky; Distributions
Subjects:Sciences > Physics > Astrophysics
ID Code:74901
Deposited On:05 Oct 2022 06:41
Last Modified:05 Oct 2022 08:12

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