Titre du document

BL Lac identified as a Radio Source

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Nom du Corpus

AstroConcepts

Auteur(s)
  • JOHN L. SCHMITT
Affiliation(s)
  • David Dunlap Observatory, University of Toronto, Richmond Hill, Ontario, Canada.
Résumé

I WISH to draw attention to the fact that a new position (1950 = 22h 00m 38s.9 0s.7, 1950 = 42 02 099) and optical identification1 of the radio source VRO 42.22.01 (ref. 2) determined with the Algonquin Radio Observatory 150 ft. telescope places it coincident with the irregular variable star BL Lac. BL Lac was discovered by Hoffmeister3, and varies from the thirteenth to sixteenth magnitude with fluctuations of large fractions of a magnitude in a few days4. A finding chart is published by Hoffmeister5; the position of the variable in the chart by Semakin4 seems to be slightly in error. Examination of a glass copy of the National Geographic Society and Palomar Observatory Sky Survey at the Dunlap Observatory shows marginal nebulosity about the star. The optical properties of this object combined with its radio polarization and unusual microwave spectrum1 make it outstandingly interesting.

Langue(s) du document
Indéterminé
Année de publication
1968
Revue

Nature

Éditeur
Nature
Type de publication
journal
Type de document
other
Présence de XML structuré
Oui
Version de PDF
1.4
Score de qualité du texte
3.757
Nom du concept
  • Beta Lacertae object
Catégories Science-Metrix
  • 1 - general ; 2 - general science & technology ; 3 - general science & technology
Catégories Inist
  • 1 - sciences appliquees, technologies et medecines ; 2 - sciences biologiques et medicales ; 3 - sciences medicales ; 4 - pathologie osteoarticulaire
Catégories Scopus
  • 1 - General ; 2 - Multidisciplinary ; 3 - Multidisciplinary
Catégories WoS
  • 1 - science ; 2 - multidisciplinary sciences
Identifiant ISTEX
D3720D843CBCA644FC89A0D23C199A43C7635DBB
ark:/67375/GT4-ZW3NGRJ0-1
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