The GALANTE Photometric System

Abstract

This paper describes the characterization of the GALANTE photometric system, a seven intermediate- and narrow-band filter system with a wavelength coverage from 3000 $\mathring{A}$ to 9000 $\mathring{A}$ . We describe the photometric system presenting the full sensitivity curve as a product of the filter sensitivity, CCD, telescope mirror, and atmospheric transmission curves, as well as some first- and second-order moments of this sensitivity function. The GALANTE photometric system is composed of four filters from the J-PLUS photometric system, a twelve broad-to-narrow filter system, and three exclusive filters, specifically designed to measure the physical parameters of stars such as effective temperature $T_{\mathrm{eff}}$, $\log (g)$, metallicity, colour excess $E(4405-5495)$, and extinction type $R_{5495}$. Two libraries, the Next Generation Spectral Library (NGSL) and the one presented in Maíz Apellániz & Weiler (2018), have been used to determine the transformation equations between the Sloan Digital Sky Survey ($\text{SDSS}$) $\text{ugriz}$ photometry and the GALANTE photometric system. We will use this transformation to calibrate the zero points of GALANTE images. To this end, a preliminary photometric calibration of GALANTE has been made based on two different $\text{griz}$ libraries ($\text{SDSS}$ DR12 and ATLAS All-Sky Stellar Reference Catalog, hereinafter $\text{RefCat2}$). A comparison between both zero points is performed leading us to the choice of $\text{RefCat2}$ as the base catalogue for this calibration, and applied to a field in the Cyg OB2 association.

Accepted in MNRAS

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Cited by in corpus (8)

• OB associations and their origins
• The Alma catalog of OB stars. II. A cross-match with Gaia DR2 and an updated map of the solar neighbourhood
• J-PLUS: photometric calibration of large area multi-filter surveys with stellar and white dwarf loci
• The Villafranca catalog of Galactic OB groups: I. Systems with O2-O3.5 stars
• Galactic extinction laws: I. A global NIR analysis with 2MASS photometry
• Galactic extinction laws: II. Hidden in plain sight, a new interstellar absorption band at 7700 Å broader than any known DIB
• The Alma catalogue of OB stars. III. A cross-match with Gaia DR3 and an extension based on new spectral classifications
• The GALANTE photometric survey of the northern Galactic plane: Project description and pipeline