Re-brightening of XMMSL1 J171900.4-353217

We continued our Swift-XRT monitoring of the new very-faint X-ray source XMMSL1 J171900.4-353217 [ATel #2607, #2656]. Two new observations were obtained on Jun 14th and 29th and we fitted both observations with an absorbed powerlaw model, keeping the hydrogen column density constant to the value 3.4E22 cm-2 (see ATel #2627). The resulting photon index is 2.16+/-0.28 and 2.11+/-0.14 respectively and the absorbed (unabsorbed) flux in 2-10 keV range is 1.67E-11 (2.3E-11) ergs cm-2 s-1 and 5.12E-11 (7E-11) respectively. For a distance of 8 kpc, the unabsorbed flux during Jun 14th observation translates into a luminosity of 1.76E35 erg s-1 and during the Jun 29th observation to 5.36E35 ergs s-1.