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A Chandra observation of the old open cluster M67
Maureen van den Berg, Gianpiero Tagliaferri, Tomaso Belloni +1
We present the results of a 47-ks Chandra-ACIS observation of the old open cluster M67. We detected 25 proper-motion cluster members (including ten new sources) and 12 sources (all…
BeppoSAX Observations of 1-Jy BL Lacertae Objects - II
P. Padovani, L. Costamante, P. Giommi +3
We present new BeppoSAX LECS and MECS observations, covering the energy range 0.1 - 10 keV (observer's frame), of four BL Lacertae objects selected from the 1 Jy sample. All source…
Wide band X-ray and optical observations of the BL Lac object 1ES 1959+650 in high state
G. Tagliaferri, M. Ravasio, G. Ghisellini +5
The blazar 1ES 1959+650 was observed twice by BeppoSAX in September 2001 simultaneously with optical observations. We report here the X-ray data together with the optical, R_C magn…
SIMBOL-X : a new generation hard X-ray telescope
P. Ferrando, M. Arnaud, B. Cordier +17
SIMBOL-X is a hard X-ray mission, operating in the 0.5-70 keV range, which is proposed by a consortium of European laboratories for a launch around 2010. Relying on two spacecraft…
Coordinated Multiwavelength Observations of BL Lacertae in 2000
M. Boettcher
BL Lacertae was the target of an extensive multiwavelength monitoring campaign in the second half of 2000. Simultaneous or quasi-simultaneous observations were taken at radio (UMRA…
BeppoSAX and multiwavelength observations of BL Lacertae in 2000
M. Ravasio, G. Tagliaferri, G. Ghisellini +3
We present two BeppoSAX observations of BL Lac (2200+420) as part of a multiwavelength campaign performed in 2000. The source was in different states of activity: in June, the X-ra…