The first outburst of the new magnetar candidate SGR 0501+4516 (2009)
Rea, Nanda, Israel, GianLuca, Turolla, Roberto, Esposito, Paolo, Mereghetti, Sandro, Gotz, Diego, ...
We report here on the outburst onset and evolution of the new Soft Gamma Repeater SGR 0501+4516. We monitored the new SGR with XMM-Newton starting on 2008 August 23, one day after the source became...
Campana, Sergio, Stella, Luigi, Israel, Gianluca, D'Avanzo, Paolo
We present X-ray observations of the transient accretion-powered millisecond pulsar IGR J00291+5934 during quiescence. IGR J00291+5934 is the first source among accretion powered millisecond pulsars...
Kaur, Ramanpreet, Wijnands, Rudy, Patruno, Alessandro, Testa, Vincenzo, Israel, GianLuca, Degenaar, Nathalie, ...
We present results from our Chandra and XMM-Newton observations of two low-luminosity X-ray pulsators SAX J1324.4-6200 and SAX J1452.8-5949 which have spin-periods of 172 s and 437 s respectively....
Optical emission from GRB 050709: a short/hard GRB in a star forming galaxy (2007)
Covino, Stefano, Malesani, Daniele, Israel, GianLuca, D'Avanzo, Paolo, Antonelli, L. Angelo, Chincarini, Guido, ...
We present optical observations of the short/hard gamma-ray burst GRB 050709, the first such event with an identified optical counterpart. The object is coincident with a weak X-ray source and is...
Transient Phenomena in Anomalous X-ray Pulsars (2007)
Israel, GianLuca, Bernardini, Federico, Burgay, Marta, Rea, Nanda, Possenti, Andrea, Dall'Osso, Simone, ...
In 2003 a previously unpulsed Einstein and ROSAT source cataloged as soft and dim (Lx of few 10^33 ergs) thermal emitting object, namely XTE J1810-197, was identified as the first unambiguous...
Negueruela, Ignacio, Marco, Amparo, Israel, GianLuca, Bernabeu, Guillem
(Abridged) The open cluster NGC 1893, illuminating the HII region IC410, contains a moderately large population of O-type stars and is one of the youngest clusters observable in the optical range. We...
Spectral modelling of the high energy emission of the magnetar 4U 0142+614 (2007)
Rea, Nanda, Turolla, Roberto, Zane, Silvia, Tramacere, Andrea, Stella, Luigi, Israel, Gianluca, ...
We present an empirical spectral modelling of the high energy emission of the anomalous X-ray pulsar 4U 0142+614, based on simultaneous Swift and INTEGRAL observations from X to gamma-ray energies....
Chaty, Sylvain, Mignani, Roberto, Israel, Gianluca
We had reported in Chaty, Mignani, Israel (2002) on the near-infrared (NIR) identification of a possible counterpart to the black hole candidate XTE J1908+094 obtained with the ESO/NTT. Here, we...
Chaty, Sylvain, Mignani, Roberto, Israel, Gianluca
We had reported in Chaty, Mignani, Israel (2002) on the near-infrared (NIR) identification of a possible counterpart to the black hole candidate XTE J1908+094 obtained with the ESO/NTT. Here, we...
Chaty, Sylvain, Mignani, Roberto P., Israel, Gianluca
We had reported in Chaty, Mignani, Israel (2002) on the near-infrared (NIR) identification of a possible counterpart to the black hole candidate XTE J1908+094 obtained with the ESO/NTT. Here, we...
Gravitational Radiation from Newborn Magnetars (2005)
Stella, Luigi, Dall'Osso, Simone, Israel, GianLuca, Vecchio, Alberto
There is growing evidence that two classes of high-energy sources, the Soft Gamma Repeaters and the Anomalous X-ray Pulsars contain slowly spinning ``magnetars'', i.e. neutron stars whose emission is...
Israel, GianLuca, Covino, Stefano, Mignani, Roberto, Stella, Luigi, Marconi, Gianni, Testa, Vincenzo, ...
The sky region including the Chandra position of SGR 1806-20 was monitored in the IR band during 2004, following its increased high energy bursting activity. Observations were performed using...
Discovery of Rapid X-ray Oscillations in the Tail of the SGR 1806-20 Hyperflare (2005)
Israel, GianLuca, Belloni, Tomaso, Stella, Luigi, Rephaeli, Yoel, Gruber, Duane, Casella, Pier Giorgio, ...
We have discovered rapid Quasi Periodic Oscillations (QPOs) in RXTE/PCA measurements of the pulsating tail of the 27th December 2004 giant flare of SGR 1806-20. QPOs at about 92.5Hz are detected in a...
Chaty, Sylvain, Mignani, Roberto, Israel, Gianluca
We had reported in Chaty, Mignani, Israel (2002) on the near-infrared (NIR) identification of a possible counterpart to the black hole candidate XTE J1908+094 obtained with the ESO/NTT. Here, we...
Chaty, Sylvain, Mignani, Roberto, Israel, Gianluca
We had reported in Chaty, Mignani, Israel (2002) on the near-infrared (NIR) identification of a possible counterpart to the black hole candidate XTE J1908+094 obtained with the ESO/NTT. Here, we...
Unveiling the multi-wavelength phenomenology of Anomalous X-ray Pulsars (2003)
Israel, GianLuca, Stella, Luigi, Covino, Stefano, Campana, Sergio, Angelini, Lorella, Mignani, Roberto, ...
During 2002-2003 the number of IR-identified counterparts to the Anomalous X-ray Pulsars (AXPs) has grown to four (4U0142+614, 2E2259+584, 1E 1048-59 and 1RXS J170849-400910) out of the six assessed...
Unveiling the nature of the 321s Orbital Period X-ray source RX J0806.3+1527 (2003)
Israel, GianLuca, Stella, Luigi, Covino, Stefano, Campana, Sergio, Marconi, Gianni, Mauche, Christopher W., ...
A nearly simultaneous X-ray/optical (Chandra and VLT) observational campaign of RX J0806.3+1527 has been carried out during November 2001. These observations allowed us to phase the X-ray and optical...
The Be/X-ray transient KS 1947+300 (2002)
Negueruela, Ignacio, Israel, GianLuca, Marco, Amparo, Norton, Andrew J., Speziali, Roberto
We present optical spectroscopy and optical and infrared photometry of the counterpart to the transient X-ray source KS 1947+300. The counterpart is shown to be a moderately reddened V=14.2...
Covino, Stefano, Negueruela, Ignacio, Campana, Sergio, Israel, Gianluca, Polcaro, Francesco, Stella, Luigi, ...
We report on the discovery and confirmation of the optical counterparts of the two transient X-ray pulsars, RXJ0052.1-7319 and XTEJ0111.2-7317. In the narrow (~3" radius) X-ray error circle of...
Israel, GianLuca, Negueruela, Ignacio, Campana, Sergio, Covino, Stefano, Di Paola, Andrea, Maxwell, Diana H., ...
We report on the identification of the optical/IR counterpart of the 29.5-s transient X-ray pulsar GS 1843+009. We re-analysed an archival ROSAT HRI observation of GS 1843+009, obtaining a new...
Evidence for an ~80 day periodicity in the X-ray transient pulsar XTE J1946+274 (1999)
Campana, Sergio, Israel, Gianluca, Stella, Luigi
We report evidence for an ~ 80 d periodicity in the X-ray flux of the hard transient pulsar XTE J1946+274. The 1.3-12 keV light curve obtained with the RossiXTE All Sky Monitor shows five regularly...
Further evidence that 1RXS J170849.0-400910 is an Anomalous X-ray pulsar (1999)
Israel, GianLuca, Covino, Stefano, Stella, Luigi, Campana, Sergio, Mereghetti, Sandro
We report the results of two ROSAT HRI observations of the recently discovered 11s X-ray pulsar 1RXS J170849.0-400910. A refined position with a smaller error radius (10" uncertainty) and a new spin...
BeppoSAX and ASCA observations of the Galactic Bulge source 1E1743.1-2843 (1999)
Cremonesi, Davide I., Mereghetti, Sandro, Sidoli, Lara, Israel, GianLuca
We report the results of BeppoSAX and ASCA observations of the X-ray source 1E1743.1-2843, located in the region of the galactic center, performed between 1993 and 1998. Observations spanning almost...