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Title:
Flux Calibration and Extinction Properties from the Nearby Supernova Factory
Authors:
Buton, Clement; Aldering, G.; Antilogus, P.; Aragon, C.; Bailey, S.; Baltay, C.; Bongard, S.; Childress, M.; Copin, Y.; Gangler, E.; Jerke, J.; Loken, S.; Nugent, P.; Pain, R.; Pecontal, E.; Pereira, R.; Perlmutter, S.; Rabinovitz, D.; Rigaudier, G.; Ripoche, P.; Runge, K.; Scalzo, R.; Smadja, G.; Swift, H.; Tao, C.; Thomas, R. C.; Wu, C.
Affiliation:
AA(Institut de Physique Nucleaire de Lyon, France), AB(Lawrence Berkeley National Laboratory), AC(Laboratoire de Physique Nucleaire et des Hautes Energies, France), AD(Lawrence Berkeley National Laboratory), AE(Laboratoire de Physique Nucleaire et des Hautes Energies, France), AF(Yale University), AG(Laboratoire de Physique Nucleaire et des Hautes Energies, France), AH(Lawrence Berkeley National Laboratory), AI(Institut de Physique Nucleaire de Lyon, France), AJ(Institut de Physique Nucleaire de Lyon, France), AK(Yale University), AL(Lawrence Berkeley National Laboratory), AM(Lawrence Berkeley National Laboratory), AN(Laboratoire de Physique Nucleaire et des Hautes Energies, France), AO(Centre de Recherche Astrophysique de Lyon, France), AP(Laboratoire de Physique Nucleaire et des Hautes Energies, France), AQ(Lawrence Berkeley National Laboratory), AR(Yale University), AS(Centre de Recherche Astrophysique de Lyon, France), AT(Laboratoire de Physique Nucleaire et des Hautes Energies, France), AU(Lawrence Berkeley National Laboratory), AV(Yale University), AW(Institut de Physique Nucleaire de Lyon, France), AX(Lawrence Berkeley National Laboratory), AY(Institut de Physique Nucleaire de Lyon, France), AZ(Lawrence Berkeley National Laboratory), BA(Laboratoire de Physique Nucleaire et des Hautes Energies, France)
Publication:
American Astronomical Society, AAS Meeting #213, #489.04; Bulletin of the American Astronomical Society, Vol. 41, p.464
Publication Date:
01/2009
Origin:
AAS
Bibliographic Code:
2009AAS...21348904B

Abstract

The Nearby Supernova Factory has discovered and observed in detail a large sample of Type Ia supernovae using the dedicated Supernovae Integral Field Spectrograph (SNIFS). This custom-built spectrograph has been in operation since 2004 on the Univeristy of Hawaii 2.2-m telescope on Mauna Kea. To reach the targeted spectrophotometric accuracy, attention has been focused on several key aspects of the calibration procedure, including: estimating the nightly photometric quality, derivation of the nightly sky extinction over the extended optical domain (320-1000 nm), its modeling in terms of physical components (Rayleigh and aerosol scattering, ozone absorption and telluric lines) and its variability within a given night. For this purpose, an optimal algorithm has been implemented to analyze atmospheric conditions from approximately 2300 observations of spectrophotometric standard stars taken throughout the night over nearly 300 individual nights.
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