HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.

ASCA IAU Circulars

Circ. #: 5993

Source: Markarian 421

Comments: Energy flux from the GIS showed Mkn 421 about 2 times brighter than when observed with EXOSAT in 1984. Photon index of 2.5.

Authors: T. Takahashi, M Tashiro, T. Kamae, K. Makishima, T. Kii, F. Makino, T. Ohashi, F. Takahara, N. Y. Yamasaki, R. Hartman, G. Madejski, R. C. Lamb, and T. C. Weekes

next Proceed to the next article Return to the previous article

contents Select another article