STARSFLUX: an all-sky catalogue of absolute spectro-photometric calibrators from 0.3 to 30 μm

@misc{rosas2026starsflux,
  title = {{STARSFLUX: an all-sky catalogue of absolute spectro-photometric calibrators from 0.3 to 30 $μ$m}},
  author = {Violeta Gámez Rosas and Michiel Hogerheijde and Roy van Boekel and Jozsef Varga and Walter Jaffe and Alexis Matter and Peter H. Hauschildt and Leonard Burtscher and James Leftley and Bruno Lopez and Florentin Millour and Romain G. Petrov and Harikumar N},
  howpublished = {arXiv},
  year = {2026},
  month = jul,
  doi = {10.48550/arxiv.2607.11730},
  eprint = {2607.11730},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2607.11730},
}

TY  - UNPB
TI  - STARSFLUX: an all-sky catalogue of absolute spectro-photometric calibrators from 0.3 to 30 μm
AU  - Violeta Gámez Rosas
AU  - Michiel Hogerheijde
AU  - Roy van Boekel
AU  - Jozsef Varga
AU  - Walter Jaffe
AU  - Alexis Matter
AU  - Peter H. Hauschildt
AU  - Leonard Burtscher
AU  - James Leftley
AU  - Bruno Lopez
AU  - Florentin Millour
AU  - Romain G. Petrov
AU  - Harikumar N
PY  - 2026
DA  - 2026/07/13
PB  - arXiv
DO  - 10.48550/arxiv.2607.11730
UR  - https://arxiv.org/abs/2607.11730
AB  - Obtaining accurate fluxes for faint sources from the ground at near- and mid-infrared wavelengths is challenging because of rapidly varying atmospheric absorption, and is often limited by the lack of a nearby spectro-photometric calibrator. We present the STellar Absolute Reference Spectroscopic Flux Library (STARSFLUX), an all-sky catalogue of 64,484 calibrator spectra spanning 0.3--30 μm, based on the Mid-infrared stellar Diameters and Fluxes compilation Catalogue (MDFC). STARSFLUX combines Gaia DR3 stellar parameters, multi-band photometry from space- and ground-based surveys, and synthetic NewEra PHOENIX atmosphere models. For each star, we fit the observed SED with an interpolated model spectrum, angular diameter, and extinction to produce an absolutely flux-calibrated spectrum. The derived angular diameters can also be used to calibrate interferometric observations. We validate the catalogue using three independent tests. First, STARSFLUX angular radii agree closely with Gaia DR3 radii, with a median |ΔR|/R_Gaia,DR3 ≃ 4.8 per cent. Second, integrated L-band (2.8--4.2 μm) fluxes for 12 stars in common with the Cohen infrared standards agree with Cohen values with a mean absolute percentage difference of 4.7 ± 2.6 per cent. Third, comparison with Gaia DR3 BP/RP spectra shows that the near-UV/visible/near-IR absolute spectro-photometric fluxes agree to approximately 3 per cent. The FITS spectra are available at https://home.strw.leidenuniv.nl/~gamez/ and will be submitted to VizieR.
ER  -