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Title: High energy x-ray observations of BL Lacertae objects

Abstract

BL Lac objects are of considerable current interest both because they were recently realized to be a new class of objects and because they were found to be similar in many significant respects to QSOs and Seyfert Galaxies. Since at least one model for the X-ray emission predicts a flattening of the X-ray spectrum above a few keV, several of these sources were studied using the high energy scintillation telescopes on OSO-8 and Ariel-5. With the possible exception of Markaryan 421, only upper limits were obtained for the X-ray emission in the energy ranges 25-60 and 60-130 keV, these results thus imposing constraints on any spectral breaks.

Authors:
; ; ; ;
Publication Date:
Research Org.:
National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center
OSTI Identifier:
5637212
Report Number(s):
N-79-20943
TRN: 80-003652
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMIC X-RAY SOURCES; X-RAY SPECTRA; ARIEL SATELLITES; EMISSION SPECTRA; ORBITING SOLAR OBSERVATORIES; QUASARS; SEYFERT GALAXIES; TELESCOPES; COSMIC RADIO SOURCES; COSMIC RAY SOURCES; GALAXIES; SATELLITES; SPECTRA; 640103* - Astrophysics & Cosmology- Quasi-Stellar, Radio, & X-Ray Sources- (-1987)

Citation Formats

Coe, M.J., Dennis, B.R., Dolan, J.F., Crannell, C.J., and Frost, K.J. High energy x-ray observations of BL Lacertae objects. United States: N. p., 1979. Web.
Coe, M.J., Dennis, B.R., Dolan, J.F., Crannell, C.J., & Frost, K.J. High energy x-ray observations of BL Lacertae objects. United States.
Coe, M.J., Dennis, B.R., Dolan, J.F., Crannell, C.J., and Frost, K.J. Thu . "High energy x-ray observations of BL Lacertae objects". United States.
@article{osti_5637212,
title = {High energy x-ray observations of BL Lacertae objects},
author = {Coe, M.J. and Dennis, B.R. and Dolan, J.F. and Crannell, C.J. and Frost, K.J.},
abstractNote = {BL Lac objects are of considerable current interest both because they were recently realized to be a new class of objects and because they were found to be similar in many significant respects to QSOs and Seyfert Galaxies. Since at least one model for the X-ray emission predicts a flattening of the X-ray spectrum above a few keV, several of these sources were studied using the high energy scintillation telescopes on OSO-8 and Ariel-5. With the possible exception of Markaryan 421, only upper limits were obtained for the X-ray emission in the energy ranges 25-60 and 60-130 keV, these results thus imposing constraints on any spectral breaks.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {2}
}

Technical Report:
Other availability
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