MEGASTAR: MEGARA-GTC Stellar Spectral Library
Abstract
MEGARA is an optical integral field and multi-object fiber-based spectrograph for the GTC, commissioned at the telescope in 2017 and in operation as a common user instrument since 2018. MEGASTAR is an instrument-oriented empirical library from MEGARA HR star data, crucial for the correct interpretation of the stellar content in the observations. HR spectra have R∼20000 in the spectral intervals 6420 - 6790 Å (HR-R) and 8370 - 8885 Å, (HR-I). The pilot project was presented in SEA-2018 based on commissioning observations. Since then, we have been awarded filler-type Open Time in 2018B, 2019A, 2019B and 2020A, observed and reduced more than 1000 spectra, created a database and published the first paper (García-Vargas et al. 2020). The advantage of using MEGARA IFU is to obtain a stellar library with homogeneous spectral resolution regardless seeing conditions or alignment errors between the target and the entrance focal plane (slit), which is a problem in other atlases, especially at such high spectral resolution. We are about to submit the second paper (Carrasco et al. 2020) with the results of the Release 1.0 of MEGARA-GTC spectral library, a set of 838 spectra from 414 stars obtained with the granted time in the first three semesters that become public to the community. We describe the project and, in particular, the imminent launch of the release 1.0 and the public database.
- Publication:
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XIV.0 Scientific Meeting (virtual) of the Spanish Astronomical Society
- Pub Date:
- July 2020
- Bibcode:
- 2020sea..confE.140G