Quasi-simultaneous ultraviolet optical and infrared observations of the BL Lacertae object PKS 0048-09

Details Quasi-simultaneous ultraviolet optical and infrared observations of the BL Lacertae object PKS 0048-09 Quasi-simultaneous ultraviolet optical and infrared observations of the BL Lacertae object PKS 0048-09

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335..122f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 335, Dec. 1, 1988, p. 122-125.

Astronomy and Astrophysics

Astronomy

16

Bl Lacertae Objects, Infrared Sources (Astronomy), Ultraviolet Astronomy, Active Galactic Nuclei, Iue, Visible Spectrum

Scientific paper

This paper reports on quasi-simultaneous UV, optical, and IR observations of the BL Lac object PKS 0048-09, carried out on January 7-9, 1987, when the object was in a moderately high optical state. The data were used to derive a detailed energy distribution from about 10 to the 14th to about 2.5 x 10 to the 15th Hz. A comparison of observations obtained on January 7-9, 1987, with observations on September 12, 1986, pertaining to a lower state of the source, indicates spectral hardening with increasing intensity on time scales of months.

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