The Gaia grid of spectro-photometric standard stars

N. Sanna; E. Pancino; G. Altavilla; S. Marinoni; M. Rainer

doi:10.1117/12.2560520

13 December 2020 The Gaia grid of spectro-photometric standard stars

N. Sanna, E. Pancino, G. Altavilla, S. Marinoni, M. Rainer

Proceedings Volume 11449, Observatory Operations: Strategies, Processes, and Systems VIII; 114492O (2020) https://doi.org/10.1117/12.2560520
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

We describe the preliminary results of a ground-based observing campaign aimed at building a grid of approximately 200 spectro-photometric standard stars (SPSS), with an internal ≅1% accuracy (and sub-percent precision), tied to CALSPEC Vega and Sirius systems within ≅1%, for the absolute flux calibration of data gathered by Gaia, the European Space Agency (ESA) astrometric mission. The criteria for the selection and a list of candidates are presented, together with a description of the survey's strategy and the adopted data analysis methods. All candidates were also monitored for constancy (within ±5 mmag, approximately). The present version of the grid contains about half of the final sample, it has already reached the target accuracy but the precision will substantially improve with future releases. It will be used to calibrate the Gaia (E)DR3 release of spectra and photometry.

Citation Download Citation

N. Sanna, E. Pancino, G. Altavilla, S. Marinoni, and M. Rainer "The Gaia grid of spectro-photometric standard stars", Proc. SPIE 11449, Observatory Operations: Strategies, Processes, and Systems VIII, 114492O (13 December 2020); https://doi.org/10.1117/12.2560520

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