The data-reduction software for GIRAFFE, the VLT medium resolution multi-object fiber-fed spectrograph

被引：46

作者：

Blecha, A ^{[1
]}

Cayatte, V ^{[1
]}

North, P ^{[1
]}

Royer, F ^{[1
]}

Simond, G ^{[1
]}

机构：

[1] Observ Geneva, CH-1290 Sauverny, Switzerland

来源：

OPTICAL AND IR TELESCOPE INSTRUMENTATION AND DETECTORS, PTS 1 AND 2 | 2000年 / 4008卷

关键词：

multi-object spectroscopy; data-reduction; fiber-fed spectroscopy; simultaneous calibration; radial velocity;

D O I：

10.1117/12.395507

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A brief overview is given of the Data-Reduction Software (DRS) being developed at Geneva and Paris Observatories for the fiber-fed multi-object GIRAFFE spectrograph - part of the VLT FLAMES facility. The specific aspects of each of three modes (MEDUSA: single-fiber/object, IFU: 20 fibers/object, ARGUS: all fibers on one object) is presented and discussed. The localization and the extraction are described in more details, the original features are outlined and the critical issue addressed. We discuss the problem of the PSF variation across the surface of the detector and the impact on the sky subtraction. The strategy of the real-time data quality assessment using the simultaneous calibration exposure is described. Some aspect of the DRS implementation and the VLT environment are discussed. The dirty prototype of the DRS under Matlab including the crude instrument simulator is discussed and some experiments measuring the expected accuracy of radial-velocity are shown.

引用

页码：467 / 474

页数：8