The JEM-X Signal Multiplexing Systems are large HURA codes "written" in a pure tungsten plate 0.5 mm thick. 24.247 hexagonal pixels (25% open) are spread over a...

We report on optical photometry and spectroscopy of the black hole X-ray transient Swift J1910.2-0546/MAXI J1910-057 (Krimm at al. ATel #4139, Usui et al. ATel...

The authors report preliminary results on the optical properties (morphology, surface-brightness profiles, surface-brightness/size relationships, ellipticities...

GX 339-4 is currently brightening at X-ray, UV, optical and radio frequencies (ATel #1945, #1954, #1960). Our monitoring campaign with the Faulkes Telescope...

We report optical photometry and spectroscopy of the candidate optical/NIR counterpart (ATEL #526, #533) to the millisecond X-ray pulsar HETE J1900.1-2455 (ATEL...

We performed BVRi imaging of the Neutron Star X-ray Binary MAXI J1647-227 (Negoro et al., ATEL #4175; Kennea et al., ATEL #4178, #4192) with the 2.5 m Nordic...

In ATel #1599; Krimm et al. report a gradual brightening and softening of SWIFT J1753.5-0127's X-ray emission, using the SWIFT satellite on June 30, 2008. We...

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The linear optical polarimetry was obtained during several observing runs at the CASLEO in San Juan, Argentina, during 2003-2007. The Torino five-channel...