Photonic passbands and zero points for the Strömgren uvby system

Michael S. Bessell

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Photonic passbands have been derived for the uvby standard system by convolving the original filter passbands of Strömgren and Perry with atmospheric extinction and the QE of a cooled 1P21 photomultiplier tube. Using these new passbands, synthetic photometry was calculated for all the stars in the extensive NGSL and MILES spectrophotometric libraries and compared with the homogenized b - y, m 1, and c 1 indices in the Hauck-Mermilliod 1998 catalog and the derived u -v and v - b colors. Excellent agreement between observed and synthetic photometry was achieved with regression slopes near unity. Slightly better fits were obtained by considering stars with b-y < 0:5 and b -y > 0:5, separately. It is recommended that these new passbands be used together with the provided transformation equations to generate synthetic photometry from model atmosphere fluxes and observed spectrophotometry. Synthetic photometry was also carried out using the natural system of the four-channel spectrograph photometers and those of Cousins and Eggen in order to explore the systematic differences that could be expected between their instrumental systems and the standard system.

    Original languageEnglish
    Pages (from-to)1442-1450
    Number of pages9
    JournalPublications of the Astronomical Society of the Pacific
    Volume123
    Issue number910
    DOIs
    Publication statusPublished - Dec 2011

    Fingerprint

    Dive into the research topics of 'Photonic passbands and zero points for the Strömgren uvby system'. Together they form a unique fingerprint.

    Cite this