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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz

IMPACT FACTOR 2018: 0.350

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ICV 2017: 121.03

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Volume 12, Issue 4


Correction of UBV Photometry for Emission Lines

A. Skopal
Published Online: 2017-02-08 | DOI: https://doi.org/10.1515/astro-2017-0088


We investigate the effect on U,B,V magnitudes of the removal of emission lines from the spectra of some symbiotic stars and novae during their nebular phases. We approach this problem by the precise reconstruction of the composite UV/optical continuum and the line spectrum. The corrections ΔU, ΔB and ΔV are determined from the ratio of fluxes with and without emission lines. We demonstrate the effect for symbiotic nova V1016 Cyg during its nebular phase. We find that about 68%, 78% and 66% of the observed flux in the U, B and V filters is radiated in the emission lines. The effect should be taken into account before using the observed color indices of emission-line objects for diagnosis of their radiation in the continuum.

Keywords: techniques; photometric; stars; emission line; stars; binaries; symbiotic


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About the article

Received: 2003-10-15

Published Online: 2017-02-08

Published in Print: 2003-12-01

Citation Information: Open Astronomy, Volume 12, Issue 4, Pages 604–609, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0088.

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© 2017. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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