Context : The burst-only source Swift J1749.4 - 2807Â was discovered in a high X-ray-active state , while during an INTEGRAL observations of the Galactic bulge on 2010 April 10 .
Pulsations at 518 Hz were discovered in the RXTE data , confirming previous suggestions of possible associations between burst-only sources and accreting millisecond X-ray pulsars .
The subsequent discovery of X-ray eclipses made Swift J1749.4 - 2807 the first eclipsing accreting millisecond X-ray pulsar .

Aims : We obtain additional information on Swift J1749.4 - 2807Â and other burst-only sources .

Methods : We report on the results of a monitoring campaign on the source , carried out for about two weeks with the Swift , Â INTEGRAL , Â and RXTE Â satellites .

Results : The observations showed that the X-ray spectrum ( energy range 0.5–40 keV ) of Swift J1749.4 - 2807Â during the entire event was accurately modeled by an absorbed power-law model ( N _ { H } \simeq 3 \times 10 ^ { 22 } Â cm ^ { -2 } , \Gamma \simeq 1.7 ) .
X-ray eclipses were also detected in the Swift  data and provides a clear evidence of a dust-scattering halo located along the line of sight to the source .
Only one type-I X-ray burst was observed throughout the two-weeks long monitoring .
The X-ray flux of Swift J1749.4 - 2807Â decayed below the detection threshold of Swift /XRT about 11Â days after the discovery , in a exponential fashion ( e-folding time of \tau =12 ^ { +7 } _ { -3 } Â days ) .

Conclusions : We compare the properties of the outburst observed from Swift J1749.4 - 2807Â with those of the previously known millisecond X-ray pulsars and other transient low mass X-ray binaries .