The 2008 May burst activation of SGR 1627-41 (2008)
Esposito, P., Israel, G. L., Zane, S., Senziani, F., Starling, R. L. C., Rea, N., ...
In May 2008 the soft gamma-ray repeater SGR 1627-41 resumed its bursting activity after nearly a decade of quiescence. After detection of a bright burst, Swift pointed its X-ray telescope in the...
An extremely luminous X-ray outburst at the birth of a supernova (2008)
Soderberg, A. M., Berger, E., Page, K. L., Schady, P., Parrent, J., Pooley, D., ...
Massive stars end their short lives in spectacular explosions, supernovae, that synthesize new elements and drive galaxy evolution. Throughout history supernovae were discovered chiefly through their...
The very soft X-ray spectrum of the Double Pulsar System J0737-3039 (2008)
Possenti, A., Rea, N., McLaughlin, M. A., Camilo, F., Kramer, M., Burgay, M., ...
We present the results of an 80 ks Chandra ACIS-S observation of the double pulsar system J0737-3039. Furthermore, we report on spectral, spatial and timing analysis of the combined X-ray...
An extremely luminous X-ray outburst at the birth of a supernova (2008)
Soderberg, A. M., Berger, E., Page, K. L., Schady, P., Parrent, J., Pooley, D., ...
Adaptive optics near-infrared observations of magnetars (2007)
Testa, V., Rea, N., Mignani, R. P., Israel, G. L., Perna, R., Chaty, S., ...
. We report on near-infrared (IR) observations of the three anomalous X-ray pulsars XTE J1810-197, 1RXS J1708-4009, 1E 1841-045 and the soft gamma-ray repeater SGR 1900+14, taken with the ESO-VLT,...
The first Suzaku observation of SGR 1806-20 (2007)
Esposito, P., Tiengo, A., Zane, S., Turolla, R., Mereghetti, S., Gotz, D., ...
The soft gamma-ray repeater SGR 1806-20 has been attracting a lot of attention owing to the fact that in December 2004 it emitted the most powerful giant flare ever observed. Here we present the...
Hard X-ray variability of Magnetar's Tails observed with INTEGRAL (2007)
Gotz, D., Mereghetti, S., Hurley, K., Esposito, P., Gotthelf, E. V., Israel, G. L., ...
Magnetar's persistent emission above 10 keV was recently discovered thanks to the imaging capabilities of the IBIS coded mask telescope on board the INTEGRAL satellite. The only two sources that show...
Esposito, P., Mereghetti, S., Tiengo, A., Zane, S., Turolla, R., Gotz, D., ...
In December 2004, the soft gamma-ray repeater SGR 1806-20 emitted the most powerful giant flare ever observed. This probably involved a large-scale rearrangement of the magnetosphere leading to...
Gotz, D., Rea, N., Israel, G. L., Zane, S., Esposito, P., Gotthelf, E. V., ...
We report on a multi-band high-energy observing campaign aimed at studying the long term spectral variability of the Anomalous X-ray Pulsar (AXP) 1RXS J170849.0-400910, one of the magnetar...
McLaughlin, M. A., Rea, N., Gaensler, B. M., Chatterjee, S., Camilo, F., Kramer, M., ...
PSR J1819-1458 is a rotating radio transient (RRAT) source with an inferred surface dipole magnetic field strength of 5e13 G and a 4.26-s spin period. We present XMM-Newton observations of the X-ray...
Very deep X-ray observations of the Anomalous X-ray Pulsar 4U 0142+614 (2007)
Rea, N., Nichelli, E., Israel, G. L., Perna, R., Oosterbroek, T., Parmar, A. N., ...
We report on two new XMM-Newton observations of the Anomalous X-ray Pulsar (AXP) 4U 0142+614 performed in March and July 2004, collecting the most accurate spectrum for this source to date....
Linking the X-ray timing and spectral properties of the glitching AXP 1RXS J170849-400910 (2007)
Israel, G. L., Gotz, D., Zane, S., Dall'osso, S., Rea, N., Stella, L.
Previous studies of the X-ray flux and spectral properties of 1RXS J170849-400910 showed hints of a possible correlation with the spin glitches that occurred in 1999 and 2001. However, due to the...
VLT/NACO observations of the High-Magnetic field radio pulsar PSR J1119-6127 (2007)
Mignani, R. P., Perna, R., Rea, N., Israel, G. L., Mereghetti, S., Curto, G. Lo
Recent radio observations have unveiled the existence of a number of radio pulsars with spin-down derived magnetic fields in the magnetar range. However, their observational properties appears to be...
Rea, N., Torres, M. A. P., Jonker, P. G., Mignani, R., Zane, S., Burgay, M., ...
We report on X-ray, optical, infrared and radio observations of the X-ray dim isolated neutron star (XDINS) 1RXS J214303.7+065419 (also known as RBS 1774). The X-ray observation was performed with...
Swift and Chandra confirm the intensity-hardness correlation of the AXP 1RXS J170849.0-400910 (2006)
Campana, S., Rea, N., Israel, G. L., Turolla, R., Zane, S.
Convincing evidence for long-term variations in the emission properties of the anomalous X-ray pulsar 1RXS J170849.0-400910 has been gathered in the last few years. In particular, and following the...
The first multi-wavelength campaign of AXP 4U 0142+61 from radio to hard X-rays (2006)
Hartog, P. R. Den, Kuiper, L., Hermsen, W., Rea, N., Durant, M., Stappers, B., ...
For the first time a quasi-simultaneous multi-wavelength campaign has been performed on an Anomalous X-ray Pulsar from the radio to the hard X-ray band. 4U 0142+61 was an INTEGRAL target for 1 Ms in...
On the nature of the intermittent pulsar PSR B1931+24 (2006)
Rea, N., Kramer, M., Stella, L., Jonker, P., Bassa, C., Groot, P., ...
PSR B1931+24 is the first intermittent radio pulsar discovered to date, characterized by a 0.8 s pulsation which turns on and off quasi-periodically every ~35 days, with a duty cycle of ~10%. We...
Rea, N., Israel, G. L., Oosterbroek, T., Campana, S., Zane, S., Turolla, R., ...
We report here on X-ray and IR observations of the Anomalous X-ray Pulsar 1RXS J170849-400910. First, we report on new XMM-Newton, Swift-XRT and Chandra observations of this AXP, which confirm the...
Our distorted view of magnetars: application of the Resonant Cyclotron Scattering model (2006)
Rea, N., Zane, S., Lyutikov, M., Turolla, R.
The X-ray spectra of the magnetar candidates are customarily fitted with an empirical, two component model: an absorbed blackbody and a power-law. However, the physical interpretation of these two...
Chandra Smells a RRAT: X-ray Detection of a Rotating Radio Transient (2006)
Gaensler, B. M., McLaughlin, M., Reynolds, S., Borkowski, K., Rea, N., Possenti, A., ...
"Rotating RAdio Transients" (RRATs) are a newly discovered astronomical phenomenon, characterised by occasional brief radio bursts, with average intervals between bursts ranging from minutes to...
Studies of Neutron Stars at Optical/IR Wavelengths (2006)
Mignani, R. P., Bagnulo, S., De Luca, A., Israel, G. L., Curto, G. Lo, Motch, C., ...
In the last years, optical studies of Isolated Neutron Stars (INSs) have expanded from the more classical rotation-powered ones to other categories, like the Anomalous X-ray Pulsars (AXPs) and the...
Search for radio pulsations in four Anomalous X-ray Pulsars and discovery of two new pulsars (2006)
Burgay, M., Rea, N., Israel, G. L., Possenti, A., Burderi, L., Di Salvo, T., ...
We report on observations of four southern Anomalous X-ray Pulsars, (1RXS J170849.0-400910, 1E 1048.1-5937, 1E 1841-045 and AX J1845-0258), obtained at 1.4 GHz using the Parkes radio telescope. Radio...
Constraints on Galactic Intermediate Mass Black Holes (2006)
Mapelli, M., Ferrara, A., Rea, N.
Intermediate Mass Black Holes (IMBHs; 10^1.3-5 M_sun) are thought to form as relics of Population III stars or from the runaway collapse of stars in young clusters; their number and very existence...
Zane, S., Rea, N., Israel, G.L., Tiengo, A., Mereghetti, S., Stella, L., ...
We report the results of XMM-Newton observations of the two anomalous X-ray pulsars 1RXS J170849.0-400910 and 1E 1048.1-5937. We discuss their long term evolution and the existence of correlations...
Discovery of the X-ray Counterpart to the Rotating Radio Transient J1819--1458 (2005)
Reynolds, S. P., Borkowski, K. J., Gaensler, B. M., Rea, N., McLaughlin, M., Possenti, A., ...
We present the discovery of the first X-ray counterpart to a Rotating RAdio Transient (RRAT) source. RRAT J1819--1458 is a relatively highly magnetized (B $\sim 5\times10^{13}$ G) member of a new...
Tiengo, A., Esposito, P., Mereghetti, S., Rea, N., Stella, L., Israel, G. L., ...
XMM-Newton observed the soft gamma repeater SGR 1806-20 about two months after its 2004 December 27 giant flare. A comparison with the previous observations taken with the same instrument in...
Post-glitch variability in the Anomalous X-ray Pulsar 1RXS J170849.0-400910 (2005)
Rea, N., Oosterbroek, T., Zane, S., Turolla, R., Mendez, M., Israel, G. L., ...
We report on the first XMM-Newton observation of the Anomalous X-ray Pulsar 1RXS J170849.0-400910. The source was observed in 2003 August and was found at a flux level a factor of about two lower...
Rea, N., Tiengo, A., Mereghetti, S., Israel, G. L., Zane, S., Turolla, R., ...
We report on the results of a ~30 ks Chandra pointing of the soft gamma-ray repeater SGR 1806-20, the first X-ray observation with high spectral resolution performed after the 2004 December 27 Giant...
Tiengo, A., Mereghetti, S., Turolla, R., Zane, S., Rea, N., Stella, L., ...
We report the results of a recent (July 2004) XMM-Newton Target of Opportunity observation of the Anomalous X-ray pulsar 1E 1048.1-5937, together with a detailed re-analysis of previous observations...
Mereghetti, S., Tiengo, A., Esposito, P., Gotz, D., Stella, L., Israel, G. L., ...
The low energy (
Post-glitch variability in the anomalous X-ray pulsar 1RXS J170849.0-400910 (2005)
Rea, N., Oosterbroek, T., Zane, S., Turolla, R., Méndez, M., Israel, G. L., ...
Optical and IR observations of SAX J1808.4-3658 in outburst (2005)
Rea, N., Testa, V., Israel, G.L., Antonelli, A., Jonker, P.G., Méndez, R.M., ...
We report on optical and infrared observations of the currently active transient millisecond pulsar SAXJ1808.4-3658 (see ATEL #505, #506, #507, #511, #513), performed with REM (Rapid Eye Mount), a...
Post-glitch variability in the anomalous X-ray pulsar 1RXSJ170849.0-400910 (2005)
Rea, N., Oosterbroek, T., Zane, S., Turolla, R., Méndez, R.M., Israel, G.L., ...
Here we report on the first XMM-Newton observation of the anomalous X-ray pulsar 1RXSJ170849.0-400910. The source was observed in 2003 August, and was found at a flux level factor of about 2 lower...
Infrared and X-ray variability of the transient Anomalous X-ray Pulsar XTE J1810-197 (2004)
Rea, N., Testa, V., Israel, G. L., Mereghetti, S., Perna, R., Stella, L., ...
We report on observations aimed at searching for flux variations from the proposed IR counterpart of the Anomalous X-ray Pulsar XTE J1810-197. These data, obtained in March 2004 with the adaptive...
Semantic Event Detection in Sports through (2004)
In this paper we investigate the retrieval of semantic events that occur in broadcast sports footage. We do so by considering the spatio-temporal behaviour of an object in the footage as being the...
Semantic Event Detection in Sports through (2004)
In this paper we investigate the retrieval of semantic events that occur in broadcast sports footage. We do so by considering the spatio-temporal behaviour of an object in the footage as being the...
Content Based analysis for video from Snooker (2004)
This paper presents three new tools appropriate for content analysis of sports, applied to footage from snooker broadcasts in particular.
Pronounced long term flux variability of the Anomalous X-ray Pulsar 1E1048.1-5937 (2004)
Mereghetti, S., Tiengo, A., Stella, L., Israel, G. L., Rea, N., Zane, S., ...
We present XMM-Newton and Chandra observations of 1E1048.1-5937, being the first to show evidence for a significant variation in the X-ray luminosity of this Anomalous X-ray Pulsar (AXP). While...
Israel, G. L., Rea, N., Mangano, V., Testa, V., Perna, R., Hummel, W., ...
We report the accurate sub-arcsec X-ray position of the new Anomalous X-ray Pulsar (AXP) XTE J1810-197, derived with a Chndra-HRC Target of Opportunity observation carried out in November 2003. We...