Calibrating the SNfactory Integral Field Spectrograph (SNIFS) with SCALA

被引：4
|
作者：
Kuesters, Daniel [1 ]
Lombardo, Simona [1 ]
Kowalski, Marek [1 ]
Aldering, Greg [2 ]
Nordin, Jacob [1 ]
Rigault, Mickael [1 ]
机构：
[1] Humboldt Univ, Inst Phys, Newtonstr 15, Berlin, Germany
[2] Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA USA
来源：
GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY VI | 2016年 / 9908卷
关键词：
Cosmology; SNe Ia; Calibration; Spectrophotometry; Integralfield spectroscopy;
D O I：
10.1117/12.2232902
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 degrees and a constant surface brightness. The wavelength of the beam can be tuned between 3200 angstrom and 10000 angstrom and has a bandwidth of 35 angstrom. 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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页数：11
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