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The first orbital period of a very bright and fast Nova in M31: M31N 2013-01b
Martino Marelli, Domitilla De Martino, Sandro Mereghetti +5
We present the first X-ray and UV/optical observations of a very bright and fast nova in the disc of M31, M31N 2013-01b. The nova reached a peak magnitude 15 mag and decayed…
The two tails of PSR J2055+2539 as seen by Chandra: analysis of the nebular morphology and pulsar proper motion
Martino Marelli, Andrea Tiengo, Andrea De Luca +4
We analyzed two Chandra observations of PSR J2055+2539 (for a total integration time of 130 ks) in order to measure its proper motion and study its two elongated nebular feat…
A new Ultraluminous X-ray source in the galaxy NGC 5907
F. Pintore, A. Belfiore, G. Novara +14
We report on the serendipitous discovery of a new transient in NGC 5907, at a peak luminosity of 6.4x10^{39} erg/s. The source was undetected in previous 2012 Chandra observations…
EXTraS discovery of a peculiar flaring X-ray source in the Galactic globular cluster NGC 6540
Sandro Mereghetti, Andrea De Luca, David Salvetti +7
We report the discovery of a flaring X-ray source in the globular cluster NGC 6540, obtained during the EXTraS project devoted to a systematic search for variability in archival da…
Observations of one young and three middle-aged -ray pulsars with the Gran Telescopio Canarias
R. P. Mignani, V. Testa, N. Rea +4
We used the 10.4m Gran Telescopio Canarias to search for the optical counterparts to four isolated -ray pulsars, all detected in the X-rays by either \xmm\ or \chan\ but not yet…