Bibcode
DOI
Worrall, D. M.; Rodriguez-Espinosa, J. M.; Wisniewski, W. Z.; Miller, H. R.; Bruhweiler, F. C.; Aller, M. F.; Aller, H. D.
Referencia bibliográfica
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 303, April 15, 1986, p. 589-595. Research supported by the Georgia State University.
Fecha de publicación:
4
1986
Revista
Número de citas
29
Número de citas referidas
29
Descripción
Multifrequency observations are presented of three BL Lac objects,
including the first UV measurements of 0912 + 297 and 1219 + 285. An
eight day optical flare was measured from 0422 = 004 in which a doubling
in visual flux density was noted; other sources displayed smaller daily
fluctuations. The 5-15 GHz radio flux from these three objects remained
constant for two months, although the 15-20 GHz emission from 0912 + 297
varied slightly over a period of a month. Constraints which are provided
by these and other Bl Lac data are discussed for inhomogeneous
relativistically beamed jet models. It is concluded that a tapered jet
model is in good agreement with the data for each source and that
additional emission regions are not required.