Search Publications

Radio to X-ray energy distribution of BL Lacertae objects.

Giommi, P.; Micol, A.; Ansari, S. G.

We present multifrequency spectra of a large number of radio and X-ray selected BL Lacertae objects constructed using non-simultaneous archival data. The data were obtained using the European Space Information System (ESIS) and are from several radio and optical catalogues, the IRAS Faint Source Catalogue, the Einstein and the EXOSAT databases. Th…

The EXOSAT GSPC iron line catalog.

Parmar, A. N.; White, N. E.; Taylor, B. G. +3 more

We report on the global properties of the Fe feature seen in the 6-7keV spectra of X-ray sources observed with the EXOSAT Gas Scintillation Proportional Counter (GSPC). Of a total of 431 spectra extracted from the EXOSAT archive, 205 required the addition of a Gaussian emission line to the continuum spectrum in order to obtain satisfactory fits. T…