Bibcode
Franco, M. L.; Crivellari, L.; Molaro, P.; Vladilo, G.; Ramella, M.; Morossi, C.; Allocchio, C.; Beckman, J. E.
Referencia bibliográfica
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 58, Dec. 1984, p. 693-704.
Fecha de publicación:
12
1984
Número de citas
12
Número de citas referidas
11
Descripción
Using a radically new suite of data extraction routines, IUEARM, high
resolution IUE spectra of six F and G stars, taken at regular intervals
since 1978 are analysed. The salient features of the new routines are:
reduction of interorder scattering via two-dimensional deconvolution of
the echelle spectrograph image plane, with high frequency filtering, to
reduce the effects of the instrument function; enhanced spectral
resolution by data extraction using a small pseudo-slit; improved
"ripple correction" yielding mutually consistent inter-order overlap
regions; and an improved absolute calibration. Rigorous limits, twice as
precise as any previously available, are set on weak spectral features,
and on possible variability of the h and k chromospheric emission cores
in the G stars. The authors show how the interstellar Mg II components
of the stars can be abstracted and used to examine a sector of the local
interstellar medium.