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The Sedentary Survey of Extreme High Energy Peaked BL Lacs. II. The Catalog and Spectral Properties
P. Giommi, S. Piranomonte, M. Perri +1
The multi-frequency `Sedentary Survey' is a deep, statistically complete, radio flux limited sample comprising 150 BL Lacertae objects distinguished by their extremely high X-ray t…
INTEGRAL observations of the field of the BL Lacertae object S5~0716+714
E. Pian, L. Foschini, V. Beckmann
We have performed observations of the blazar S5 0716+714 with INTEGRAL on 2-6 April 2004. In the first months of 2004, the source had increased steadily in optical brightness and h…
The Swift Gamma-Ray Burst Mission
N. Gehrels, G Chincarini, P. Giommi +12
The Swift mission, scheduled for launch in early 2004, is a multiwavelength observatory for gamma-ray burst (GRB) astronomy. It is the first-of-its-kind autonomous rapid-slewing sa…
Log-parabolic spectra and particle acceleration in blazars - II: The BeppoSAX wide band X-ray spectra of Mkn 501
E. Massaro, M. Perri, P. Giommi +2
We present the results of a spectral and temporal study of the complete set of BeppoSAX NFI (11) and WFC (71) observations of the BL Lac object Mkn 501. The WFC 2-28 keV data, repo…
Chandra Observations of the X-ray Environs of SN 1998bw/GRB 980425
C. Kouveliotou, S. E. Woosley, S. K. Patel +8
(Abrigded) We report X-ray studies of the environs of SN 1998bw and GRB 980425 using the Chandra X-Ray Observatory 1281 days after the GRB. Combining our observation of the superno…