SNDICE: a direct illumination calibration experiment at CFHT

Juramy-Gilles, Claire; Barrelet, E.; Schahmanèche, K.; Bailly, P.; Bertoli, W.; Evrard, C.; Ghislain, Patrick; Guimard, A.; Huppert, J.-F.; Imbault, Daniele; LaPorte, Daniel D.; Lebbolo, H.; Repain, P.; Sefri, R.; Vallereau, A.; Vincent, D.; Antilogus, P.; Astier, P.; Guy, J.; Pain, R.; Regnault, Nicolas; Attapatu, R.; Benedict, Tom; Barrick, Gregory; Cuillandre, J. C.; Gajadhar, Sarah; Ho, Kevin; Salmon, Derrick

doi:10.1117/12.789051

Cited by 3 publications

(2 citation statements)

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“…For the specific case of the MegaPrime instrument on CFHT, direct evidence for these internal reflections is provided in [237]; [224] evaluates to about 10% or more their contribution to twilight images. This justifies proposing a different artificial light source setup in [237,238]. The most recent results presenting calibration from an artificial source [239] are encouraging but do not yet outperform the stellar approach.…”

Section: Instrumental Calibration From Calibrated Laboratory Sourcesmentioning

confidence: 99%

“…However, reflections on the numerous optical surfaces in front of wide-field imagers (typically at least three lenses, one filter and the cold chamber window) contribute to the image obtained with a flat-field screen, but not to star photometry. For the specific case of the MegaPrime instrument on CFHT, direct evidence for these internal reflections is provided in [237]; [224] evaluates about 10% or more of their contribution to twilight images. This justifies proposing a different artificial light source setup in [237,238].…”

Section: Instrumental Calibration From Calibrated Laboratory Sourcesmentioning

confidence: 99%

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The expansion of the universe observed with supernovae

Astier

2012

Rep. Prog. Phys.

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Over the last 20 years, supernovae have become a key tool to constrain the expansion history of the Universe through the construction of Hubble diagrams, using luminosity distances to supernovae belonging to the 'Ia' subtype. This technique was key for the discovery that the expansion of the Universe is now accelerating. We review the principle and difficulties of the measurements, the classification and diversity of supernovae, and the physics of explosion. We discuss the systematic uncertainties affecting the cosmological conclusions with some emphasis on photometric calibration. We describe the major supernova cosmology surveys, the presented analyses and their conclusions, together with the present status of the field. We conclude on the expectations for the near future.

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