IGRJ17361-4441 is a hard transient recently observed by the INTEGRAL satellite. The source, close to the center of gravity of the globular cluster NGC 6388, quickly became the target of follow-up observations conducted by the Chandra, Swift/XRT and RXTE observatories. Here, we concentrate in particular on a set of observations conducted by the XMM-Newton satellite during two slews, to get the spectral information of the source and search for spectral variations. The spectral parameters determined by the recent XMM-Newton slew observations were compared to the previously known results. The maximum unabsorbed X-ray flux in the 0.5-10 keV band as detected by the XMM-Newton slew observations is ≃4.5 × 10-11 erg cm-2 s-1; i.e., it is consistent with that observed by the Swift/XRT satellite 15 days earlier. The spectrum seems to be marginally consistent (Γ ≃ 0.93 - 1.63) with what has been derived from the previous high-energy observations.
The XMM-Newton Slew view of IGRJ17361-4441: a transient in the globular cluster NGC 6388.
NUCITA, Achille;DE PAOLIS, Francesco;
2012-01-01
Abstract
IGRJ17361-4441 is a hard transient recently observed by the INTEGRAL satellite. The source, close to the center of gravity of the globular cluster NGC 6388, quickly became the target of follow-up observations conducted by the Chandra, Swift/XRT and RXTE observatories. Here, we concentrate in particular on a set of observations conducted by the XMM-Newton satellite during two slews, to get the spectral information of the source and search for spectral variations. The spectral parameters determined by the recent XMM-Newton slew observations were compared to the previously known results. The maximum unabsorbed X-ray flux in the 0.5-10 keV band as detected by the XMM-Newton slew observations is ≃4.5 × 10-11 erg cm-2 s-1; i.e., it is consistent with that observed by the Swift/XRT satellite 15 days earlier. The spectrum seems to be marginally consistent (Γ ≃ 0.93 - 1.63) with what has been derived from the previous high-energy observations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
