X-Shooting ULLYSES: Massive Stars at low metallicity II. DR1: Advanced optical data products for the Magellanic Clouds
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| author | Sana, H. Tramper, F. Abdul-Masih, M. Blomme, R. Dsilva, K. Maravelias, G. Martins, L. Mehner, A. Wofford, A. Banyard, G. Barbosa, C. L. Bestenlehner, J. Hawcroft, C. Hillier, D. John Todt, H. Larkin, C. J. K. Mahy, L. Najarro, F. Ramachandran, V. Ramirez-Tannus, M. C. Rubio-Diez, M. M. Sander, A. A. C. Shenar, T. Vink, J. S. Backs, F. Brands, S. A. Crowther, P. Decin, L. de Koter, A. Hamann, W. -R. Kehrig, C. Kuiper, R. Oskinova, L. Pauli, D. Sundqvist, J. Verhamme, O. collaboration, the XSHOOT-U |
| author_facet | Sana, H. Tramper, F. Abdul-Masih, M. Blomme, R. Dsilva, K. Maravelias, G. Martins, L. Mehner, A. Wofford, A. Banyard, G. Barbosa, C. L. Bestenlehner, J. Hawcroft, C. Hillier, D. John Todt, H. Larkin, C. J. K. Mahy, L. Najarro, F. Ramachandran, V. Ramirez-Tannus, M. C. Rubio-Diez, M. M. Sander, A. A. C. Shenar, T. Vink, J. S. Backs, F. Brands, S. A. Crowther, P. Decin, L. de Koter, A. Hamann, W. -R. Kehrig, C. Kuiper, R. Oskinova, L. Pauli, D. Sundqvist, J. Verhamme, O. collaboration, the XSHOOT-U |
| contents | Using the medium resolution spectrograph X-shooter, spectra of 235 OB and Wolf-Rayet (WR) stars in sub-solar metallicity environments have been secured. [...]This second paper focuses on the optical observations of 232 Magellanic Clouds targets. It describes the uniform reduction of the UVB (300 - 560 nm) and VIS (550 - 1020 nm) XShootU data as well as the preparation of advanced data products [...] . The data reduction of the raw data is based on the ESO CPL X-shooter pipeline. We paid particular attention to the determination of the response curves [...] We implemented slit-loss correction, absolute flux calibration, (semi-)automatic rectification to the continuum, and a correction for telluric lines. The spectra of individual epochs were corrected for the barycentric motion, re-sampled and co-added, and the spectra from the two arms were merged into a single flux calibrated spectrum covering the entire optical range with maximum signal-to-noise ratio. [...] We provide three types of data products: (i) two-dimensional spectra for each UVB and VIS exposure; (ii) one-dimensional UVB and VIS spectra before and after response-correction, as well as after applying various processing, including absolute flux calibration, telluric removal, normalisation and barycentric correction; and (iii) co-added flux-calibrated and rectified spectra over the full optical range, for which all available XShootU exposures were combined. For many of the targets, the final signal-to-noise ratio per resolution element is above 200 in both the UVB and the VIS co-added spectra. The reduced data and advanced scientific data products will be made available to the community upon publication of this paper. [...] |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16987 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | X-Shooting ULLYSES: Massive Stars at low metallicity II. DR1: Advanced optical data products for the Magellanic Clouds Sana, H. Tramper, F. Abdul-Masih, M. Blomme, R. Dsilva, K. Maravelias, G. Martins, L. Mehner, A. Wofford, A. Banyard, G. Barbosa, C. L. Bestenlehner, J. Hawcroft, C. Hillier, D. John Todt, H. Larkin, C. J. K. Mahy, L. Najarro, F. Ramachandran, V. Ramirez-Tannus, M. C. Rubio-Diez, M. M. Sander, A. A. C. Shenar, T. Vink, J. S. Backs, F. Brands, S. A. Crowther, P. Decin, L. de Koter, A. Hamann, W. -R. Kehrig, C. Kuiper, R. Oskinova, L. Pauli, D. Sundqvist, J. Verhamme, O. collaboration, the XSHOOT-U Solar and Stellar Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics Using the medium resolution spectrograph X-shooter, spectra of 235 OB and Wolf-Rayet (WR) stars in sub-solar metallicity environments have been secured. [...]This second paper focuses on the optical observations of 232 Magellanic Clouds targets. It describes the uniform reduction of the UVB (300 - 560 nm) and VIS (550 - 1020 nm) XShootU data as well as the preparation of advanced data products [...] . The data reduction of the raw data is based on the ESO CPL X-shooter pipeline. We paid particular attention to the determination of the response curves [...] We implemented slit-loss correction, absolute flux calibration, (semi-)automatic rectification to the continuum, and a correction for telluric lines. The spectra of individual epochs were corrected for the barycentric motion, re-sampled and co-added, and the spectra from the two arms were merged into a single flux calibrated spectrum covering the entire optical range with maximum signal-to-noise ratio. [...] We provide three types of data products: (i) two-dimensional spectra for each UVB and VIS exposure; (ii) one-dimensional UVB and VIS spectra before and after response-correction, as well as after applying various processing, including absolute flux calibration, telluric removal, normalisation and barycentric correction; and (iii) co-added flux-calibrated and rectified spectra over the full optical range, for which all available XShootU exposures were combined. For many of the targets, the final signal-to-noise ratio per resolution element is above 200 in both the UVB and the VIS co-added spectra. The reduced data and advanced scientific data products will be made available to the community upon publication of this paper. [...] |
| title | X-Shooting ULLYSES: Massive Stars at low metallicity II. DR1: Advanced optical data products for the Magellanic Clouds |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2402.16987 |