IUE observations of the BL Lac object AO 0235+164

Details IUE observations of the BL Lac object AO 0235+164 IUE observations of the BL Lac object AO 0235+164

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.201..801s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 201, Dec. 1982, p. 801-805.

Astronomy and Astrophysics

Astronomy

18

Bl Lacertae Objects, Ultraviolet Astronomy, Absorption Spectra, Centimeter Waves, Iue, Lyman Alpha Radiation, Lyman Spectra, Spin Temperature

Scientific paper

AO 0235+164 was observed with IUE during its February 1979 outburst. The object was detected in both the short and long wavelength cameras. Hydrogen Lyman-alpha absorption in the z = 0.524 system is detected with equivalent width of 62 + or - 28 A (1-sigma error). From this and previous 21-cm data, the spin temperature of the absorbing material is found to be 140 +160 -70 K.

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