Results 21 to 30 of about 952 (99)

SGR 0418+5729: a low-magnetic-field magnetar

, 2011
Soft gamma-ray repeaters and anomalous X-ray pulsars are a small (but growing) group of X-ray sources characterized by the emission of short bursts and by a large variability in their persistent flux. They are believed to be magnetars, i.e. neutron stars
A., Tiengo, Alberto, Pellizzoni, Andrea, Possenti, C., Kouveliotou, D., Go\u308tz, E., Go\u308g\u306u\u308s\u327, G. L., Israel, L., Stella, Marta, Burgay, N., Rea, Nicolo\u300, D\u2019Amico, P., Esposito, Paolo, Esposito, S., Mereghetti, S., Zane, Turolla, Roberto   +15 more
core   +1 more source

Long term Arecibo monitoring of the water megamaser in MG J0414+0534

, 2012
We monitored the 22 GHz maser line in the lensed quasar MG J0414+0534 at z=2.64 with the 300-m Arecibo telescope for almost two years to detect possible additional maser components and to measure a potential velocity drift of the lines.
Alan L. Roy, Andreas Brunthaler, C. M. Violette Impellizzeri, Castangia, Christian Henkel, John P. McKean, Olaf Wucknitz, Paola Castangia   +7 more
core   +1 more source

The first deep X-ray and optical observations of the closest isolated radio pulsar

, 2011
With a distance of 170 pc, PSR J2144-3933 is the closest isolated radio pulsar currently known. It is also the slowest and least energetic radio pulsar; indeed, its radio emission is difficult to account for with standard pulsar models, since its ...
De Luca, A., Esposito, P., Mereghetti, S., Mignani, R., Pellizzoni, A., Tiengo, A.   +5 more
core   +1 more source

Subarcsecond location of IGR J17480-2446 with Rossi XTE [PDF]

, 2012
On 2010 October 13, the X-ray astronomical satellite Rossi XTE, during the observation of the newly discovered accretion powered X-ray pulsar IGR J17480--2446, detected a lunar occultation of the source. From knowledge of lunar topography and Earth, Moon,
Araki, Bevington, Bordas, Bradt, Feroci, Folkner, Harrison, Heinke, Jahoda, Patruno, Pooley, Strohmayer, Strohmayer, Testa, Testa, Williams   +15 more
core   +2 more sources

Caratterizzazione tipologica dei rapporti tra fenomeni di desertificazione ed acque superficiali e sotterranee, osservati e studiati in Sardegna [PDF]

, 2004
This study has been carried out within a broader research project, RIADE, concerned with the characterization of the types of relationships existing between desertification processes and surfaceand groundwater observed and investigated in Objective 1 ...
Barbieri, Giulio, Barbieri, Manuela, Cambuli, Paolo, Ghiglieri, Giorgio, Vernier, Antonio, Vigo, Angelo   +5 more
core  

AGILE detection of GeV gamma-ray emission from the SNR W28

, 2010
Supernova remnants (SNRs) are believed to be the main sources of Galactic cosmic rays. Molecular clouds associated with SNRs can produce gamma-ray emission through the interaction of accelerated particles with the concentrated gas.
A. Argan, A. Bulgarelli, A. Giuliani, A. Kawamura, A. Morselli, A. Ohama, A. Pellizzoni, A. Rappoldi, A. Trois, A. W. Chen, A. Zambra, Aharonian, Aharonian, Arikawa, C. Labanti, C. Pittori, D. Zanello, Dubner, E. Costa, E. Del Monte, E. Moretti, E. Striani, E. Vallazza, F. A. Aharonian, F. D'Ammando, F. Fuschino, F. Gianotti, F. Lazzarotto, F. Longo, F. Perotti, F. Verrecchia, Frail, G. Barbiellini, G. De Paris, G. Di Cocco, G. Pucella, Gabici, Giuliani, Giuliani, Green, H. Sano, Hartman, I. Donnarumma, K. Torii, L. Pacciani, L. Salotti, M. Cardillo, M. Feroci, M. Fiorini, M. Galli, M. Marisaldi, M. Pilia, M. Prest, M. Rapisarda, M. Tavani, M. Trifoglio, Mattox, Mizuno, N. Furukawa, P. A. Caraveo, P. Giommi, P. Lipari, P. Picozza, P. Santolamazza, P. Soffitta, P. W. Cattaneo, Pittori, S. Colafrancesco, S. Mereghetti, S. Sabatini, S. Vercellone, T. Froysland, Tavani, V. Cocco, V. Vittorini, Y. Evangelista, Y. Fukui, Y. Lapshov   +77 more
core   +1 more source

Swift monitoring of the new accreting millisecond X-ray pulsar IGRJ17511-3057 in outburst [PDF]

, 2009
A new accreting millisecond X-ray pulsar, IGR J17511-3057, was discovered in outburst on 2009 September 12 during the INTEGRAL Galactic bulge monitoring programme.
Bozzo, E., Campana, S., Falanga, M., Ferrigno, C., Kennea, J. A., Papitto, A.   +5 more
core   +1 more source

The flaring blazars of the first 1.5 years of the AGILE mission

, 2010
We report the AGILE gamma-ray observations and the results of the multiwavelength campaigns on seven flaring blazars detected by the mission: During two multiwavelength campaigns, we observed gamma-ray activity from two Flat Spectrum Radio Quasars of the
Antonelli, L. A., Argan, A., Barbiellini, G., Boffelli, F., Bulgarelli, A., Caraveo, P., Cattaneo, P. W., Chen, A. W., Cocco, V., Colafrancesco, S., Costa, E., D'Ammando, F., De Paris, G., Del Monte, E., Di Cocco, G., Donnarumma, I., Evangelista, Y., Feroci, M., Ferrari, A., Fiorini, M., Froysland, T., Fuschino, F., Galli, M., Gianotti, F., Giommi, P., Giuliani, A., Labanti, C., Lapshov, I., Lazzarotto, F., Lipari, P., Longo, F., Marisaldi, M., Mastropietro, M., Mereghetti, S., Morelli, E., Moretti, E., Morselli, A., Pacciani, L., Pellizzoni, A., Perotti, F., Piano, G., Picozza, P., Pilia, M., Pittori, C., Porrovecchio, G., Prest, M., Pucella, G., Rapisarda, M., Rappoldi, A., Rubini, A., Sabatini, S., Salotti, L., Santolamazza, P., Soffitta, P., Tavani, M., Trifoglio, M., Trois, A., Vallazza, E., Vercellone, S., Verrecchia, F., Vittorini, V., Zambra, A., Zanello, D.   +62 more
core   +1 more source

Timing of Millisecond Pulsars in NGC 6752: Evidence for a High Mass-to-Light Ratio in the Cluster Core [PDF]

, 2002
Using pulse timing observations we have obtained precise parameters, including positions with about 20 mas accuracy, of five millisecond pulsars in NGC 6752.
A. G. Lyne, A. Possenti, Becker W., F. Camilo, Ferraro F. R., J. Sarkissian, Kuijken K., L. Fici, N. D’Amico, R. N. Manchester, Shklovskii I. S., Standish E. M.   +11 more
core   +2 more sources

Formation Pumping of Molecular Hydrogen in Dark Clouds

, 2010
Many theoretical and laboratory studies predict H2 to be formed in highly excited ro-vibrational states. The consequent relaxation of excited levels via a cascade of infrared transitions might be observable in emission from suitable interstellar regions.
Abgrall, Abgrall, Abgrall, Casu, Cesare Cecchi-Pestellini, Congiu, Dalgarno, Duley, Duley, Farahjabeen Islam, Fitzpatrick, Flower, Flower, Flower, Gough, Parneix, Serena Viti, Silvia Casu, Takahashi, Takahashi, Takahashi, Tiné, Williams, Wolniewicz, Zecho   +24 more
core   +1 more source