9 August 2016 Calibrating the SNfactory Integral Field Spectrograph (SNIFS) with SCALA
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The SNIFS CALibration Apparatus (SCALA), a device to calibrate the Supernova Integral Field Spectrograph on the University Hawaii 2.2m telescope, was developed and installed in Spring 2014. SCALA produces an artificial planet with a diameter of 1° and a constant surface brightness. The wavelength of the beam can be tuned between 3200 Å and 10000 Å and has a bandwidth of 35 Å. The amount of light injected into the telescope is monitored with NIST calibrated photodiodes. SCALA was upgraded in 2015 with a mask installed at the entrance pupil of the UH88 telescope, ensuring that the illumination of the telescope by stars is similar to that of SCALA. With this setup, a first calibration run was performed in conjunction with the spectrophotometric observations of standard stars. We present first estimates for the expected systematic uncertainties of the in-situ calibration and discuss the results of tests that examine the influence of stray light produced in the optics.
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Daniel Küsters, Daniel Küsters, Simona Lombardo, Simona Lombardo, Marek Kowalski, Marek Kowalski, Greg Aldering, Greg Aldering, Jakob Nordin, Jakob Nordin, Mickael Rigault, Mickael Rigault, "Calibrating the SNfactory Integral Field Spectrograph (SNIFS) with SCALA", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99084V (9 August 2016); doi: 10.1117/12.2232902; https://doi.org/10.1117/12.2232902


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