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Searching for small-scale diffuse emission around SGR 1806-20
D. Viganò, N. Rea, P. Esposito +6
Diffuse radio emission was detected around the soft gamma-ray repeater SGR 1806-20, after its 2004 powerful giant flare. We study the possible extended X-ray emission at small scal…
Three new X-ray emitting sdO stars discovered with Chandra
N. La Palombara, P. Esposito, S. Mereghetti +1
X-ray observations of sdO stars are a useful tool to investigate their properties, but so far only two sdO stars were detected at X-rays. We observed a complete flux-limited sample…
The X-ray emission of the high mass X-ray binary IGR J17200-3116
P. Esposito, G. L. Israel, L. Sidoli +3
The source IGR J17200-3116 was discovered in the hard X-ray band by INTEGRAL. A periodic X-ray modulation at ~326 s was detected in its Swift light curves by our group (and subsequ…
Constraints on the winds of hot subdwarf stars from X-ray observations of two sdB binaries with compact companions: CD -30 11223 and PG 1232-136
S. Mereghetti, N. La Palombara, P. Esposito +5
Little observational data are available on the weak stellar winds of hot subdwarf stars of B spectral type (sdB). Close binary systems composed of an sdB star and a compact object…