... Printed in the U.S.A. HIGHLY IONIZED POTASSIUM LINES IN SOLAR X-RAY SPECTRA AND THE ABUNDANCE OF POTASSIUM J. Sylwester1 , B. Sylwester1 , K. J. H. Phillips2 , and V. D. Kuznetsov3 2 Space Research Centre, Polish Academy of ... Troitsk, Moscow, Russia; kvd@izmiran.ru Received 2009 December 5; accepted 2010 January 6; published 2010 January 21 1 ABSTRACT The abundance of potassium is derived from X-ray lines observed during flares by the ...

... 84, No. 12, pp. 1110?1134. i Optical Observations of Gamma-Ray Bursts, the Discovery of Supernovae 2005bv, 2005 , and 2006ak, and Searches for Transients Using the MASTER Robotic Telescope V. M. Lipunov1 , V. G. Kornilov1 , A. V. Krylov1 , N. V. Tyurina1, A. A. Belinskii1 , E. S. Gorbovskoi2 ... , Moscow, Russia Received April 24, 2007; in final form, Abstract--We present the results of observations obtained using the MASTER robotic telescope in 2005 ? ... 2005?2006 . ... SWIFT GRB. ...

... C Cette focale fournit en effet un grossissement intermИdiaire sur bon nombre de tИlescopes d'amateur (lire encadrИ "Comment bien choisir son oculaire", p. 82). ... 78 Ciel & Espace FиVRIER 2011 Rubrique rИalisИe par Jean-Luc Dauvergne champ au banc d'essai Photos : J.-L. Dauvergne Le principe de ce comparatif Les oculaires sont des objets optiques complexes, constituИs de nombreuses lentilles. ... Son champ est trХs large avec des images aussi nettes dans les coins que sur un Nagler. ...

. Authors . Problem . Method . Advises . Contact Analysis of an accuracy of CCD asteroid observations carried out by professional and amateur astronomers . An accuracy estimation of CCD asteroid observations contained in the Minor Planet Center Database and carried out in the years 1999 - 2006 is realized. About 20 millions individual positions of the Numbered and Unnumbered Minor Planets were tested by means of calculations of (O-C) residuals to derive "mean error of a single observation" for more than 400