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Semaine de l'Astrophysique Française (SF2A 2007), Grenoble : France (2007)
The Supernovae Integral Field Spectrograph: keys to high-precision spectro-photometry
C. Buton1, Y. Copin1, E. Gangler1, G. Smadja1, E. Pecontal2, G. Rigaudier2, P. Antilogus3, S. Bailey3, R. Pain3, R. Pereira3, C. Wu3, G. Aldering, C. Aragon, S. Bongard, M. Childress, S. Loken, P. Nugent, S. Perlmutter, K. Runge, R.C. Thomas, B.A. Weaver, C. Baltay, A. Bauer, D. Rabinowitz, R. Scalzo

The Supernovae Integral Field Spectrograph: keys to a better spectro-photometry The Nearby Supernova Factory aims at discovering and observing a sample of type Ia supernovae through the dedicated Supernovae Integral Field Spectrograph, currently in operation since 2004 on Mauna-Kea UH telescope. To reach the targeted spectro-photometric accuracy, attention has been focused on various aspects of the calibration procedure, including: estimate of the night photometricity, derivation of the mean atmospheric extinction over the extended optical domain (320-1000 nm), its modeling in terms of physical components (Rayleigh and aerosol scatterings, ozone absorption and telluric lines) and its variability within a given night. Point-source extraction from the IFS datacube also requires a detailed knowledge of the atmospheric-induced point spread function (PSF). The overall accuracy of the calibration chain is estimated on reference flux standard stars.
1 :  IPNL - Institut de Physique Nucléaire de Lyon
2 :  CRAL - Centre de Recherche Astrophysique de Lyon
3 :  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique
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