A data reduction package for multiple object spectroscopy

Details A data reduction package for multiple object spectroscopy A data reduction package for multiple object spectroscopy

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986spie..627..693h&link_type=abstract

IN: Instrumentation in astronomy VI; Proceedings of the Meeting, Tucson, AZ, Mar. 4-8, 1986. Part 2 (A87-36376 15-35). Bellingha

Physics

Optics

7

Astronomical Spectroscopy, Automation, Calibrating, Charge Coupled Devices, Data Reduction, Fiber Optics, Galactic Clusters, Image Processing, Red Shift, Wavelengths

Scientific paper

Experience with fiber-optic spectrometers has demonstrated improvements in observing efficiency for clusters of 30 or more objects that must in turn be matched by data reduction capability increases. The Medusa Automatic Reduction System reduces data generated by multiobject spectrometers in the form of two-dimensional images containing 44 to 66 individual spectra, using both software and hardware improvements to efficiently extract the one-dimensional spectra. Attention is given to the ridge-finding algorithm for automatic location of the spectra in the CCD frame. A simultaneous extraction of calibration frames allows an automatic wavelength calibration routine to determine dispersion curves, and both line measurements and cross-correlation techniques are used to determine galaxy redshifts.

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