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7 papers · 1 filter
New water masers in Seyfert and FIR bright galaxies. II
P. Castangia, A. Tarchi, C. Henkel +1
Recently, a relationship between the water maser detection rate and far infrared (FIR) flux density has been found as a result of a 22 GHz maser survey in a sample comprised of nor…
Swift follow-up of the gigantic TeV outburst of PKS 2155-304 in 2006
L. Foschini, G. Ghisellini, F. Tavecchio +12
At the end of July 2006, the blazar PKS 2155-304 (z=0.116) underwent a strong outburst observed at TeV energies by HESS (up to 17 Crab flux level at E > 200 GeV). The Swift satelli…
How to improve the High Frequency capabilities of SRT
T. Pisanu, M. Morsiani, C. Pernechele +2
The SRT (Sardinia Radio Telescope) is a general purpose, fully steerable, active surface equipped, 64 meters antenna, which is in an advanced construction state near Cagliari (Sard…
Applications of precision astrometry to studies of massive YSOs
M. J. Rioja, L. Moscadelli, R. Cesaroni
We present VLBI observations of the HO maser emission towards a selection of massive young stellar objects (YSOs). In one of these sources, IRAS20126+4104, the measured proper…
A multi-wavelength study of the starburst galaxy NGC 7673
Paola Castangia, Anna Pasquali, Piero Benvenuti
HST/WFPC2 images resolved NGC 7673 into a large number of star clusters. Among these, 31 fall inside the IUE large aperture, which was used to acquire an integrated ultraviolet spe…
Is NGC 6752 Hosting a Single or a Binary Black Hole?
Monica Colpi, Michela Mapelli, Andrea Possenti
The five millisecond pulsars that inhabit NGC 6752 display locations or accelerations remarkably different with respect to all other pulsars known in globular clusters. This may re…