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X-ray emission from hot subdwarfs with compact companions
Sandro Mereghetti, Nicola La Palombara, Paolo Esposito +1
We review the X-ray observations of hot subdwarf stars. While no X-ray emission has been detected yet from binaries containing B-type subdwarfs, interesting results have been obtai…
The magnetar candidate AX J1818.8-1559
S. Mereghetti, P. Esposito, A. Tiengo +3
In October 2007 a hard X-ray burst was detected by the INTEGRAL satellite from a direction consistent with the position of AX J1818.8-1559, an X-ray source at low Galactic latitude…
The XMM-Newton survey of the Small Magellanic Cloud
F. Haberl, R. Sturm, J. Ballet +13
Although numerous archival XMM-Newton observations existed towards the Small Magellanic Cloud (SMC) before 2009, only a fraction of the whole galaxy was covered. Between May 2009 a…
Optical and X-ray observations of candidate isolated neutron stars in the G315.4-2.3 SNR
R. P. Mignani, A. Tiengo, A. De Luca
G315.4-2.3 is a young Galactic supernova remnant (SNR), whose identification as the remains of a Type-II supernova (SN) explosion has been debated for a long time. In particular, r…
A study of the long term variability of RX J1856.5-3754 with XMM-Newton
S. Mereghetti, N. Sartore, A. Tiengo +3
We report on a detailed spectral analysis of all the available XMM-Newton data of RX J1856.5-3754, the brightest and most extensively observed nearby, thermally emitting neutron st…
Discovery of a compact companion to the hot subdwarf star BD+37 442
N. La Palombara, S. Mereghetti, A. Tiengo +1
We report the results of the first X-ray observation of the luminous and helium-rich O-type subdwarf BD+37 442, carried out with the XMM-Newton satellite in August 2011. X-ray emis…
A new low magnetic field magnetar: the 2011 outburst of Swift J1822.3-1606
N. Rea, G. L. Israel, P. Esposito +20
We report on the long term X-ray monitoring with Swift, RXTE, Suzaku, Chandra and XMM-Newton of the outburst of the newly discovered magnetar Swift J1822.3-1606 (SGR 1822-1606), fr…
Spectral monitoring of RX J1856.5-3754 with XMM-Newton. Analysis of EPIC-pn data
N. Sartore, A. Tiengo, S. Mereghetti +3
Using a large set of XMM-Newton observations we searched for long term spectral and flux variability of the isolated neutron star RX J1856.5-3754 in the time interval from April 20…