Toruń Centre for Astronomy
Nicolaus Copernicus University

Atlas of extinction curves derived from ultraviolet spectra of the TD-1 satellite

Papaj Jacek, Krelowski Jacek, Wegner Walter

The collection of 166 extinction curves derived from the published low-resolution spectra acquired with the aid of the spectrometer on board the TD-1 satellite is presented. The observed variety of extinction laws is apparently due to the varied physical parameters of interstellar clouds; for example, the bright stars, included in the sample of TD-1 material, are very likely to be obscured by single clouds (interstellar or circumstellar). The system of standards constructed with the aid of a special procedure allowing the possible effects of spectral mismatch to be avoided and making possible the derivation of extinction curves even in cases of very small E(B-V)S, was applied. The curves are presented in the form of plots, normalized to E(B-V) = 1.

Interstellar Extinction, Td-1 Satellite, Ultraviolet Spectra, Cosmic Dust, Interstellar Matter, Spaceborne Astronomy