Optical and infrared monitoring of SWIFT J1753.3-0127
We report preliminary optical/infrared photometry and spectroscopy of the SWIFT J1753.3-0127 transient (ATEL #546, #549) obtained at Fred Whipple Observatory...
Optical and near-infrared spectroscopy of the black hole transient 4U 1543-47 during its 2021 ultra-luminous state
We present simultaneous optical and near-infrared spectra obtained during the 2021 outburst of the black hole transient 4U 1543-47. The X-ray hardness-intensity...
Following the recent report of a possible radio counterpart to the X-ray transient IGR J17098-3628 (ATEL #490), we re-investigated our Magellan I-band exposures...
Optical ID of CXOM31 J004253.1+411422, a bright Black Hole X-ray Nova in M31
We report the likely optical ID of the bright transient recently discovered in M31, CXOM31 J004253.1+411422 (Henze et al, ATEL #2356). With a peak X-ray...
Optical Observations of GX 339-4 in Outburst with the Faulkes Telescope South
Further to ATel #2455 (see also ATels #2380, #2384) detailing recent INTEGRAL observations of the 2010 outburst of the black hole candidate transient source GX...
Optical observations of the X-ray Transient XTE J1118+480
Time resolved (40-sec resolution, ~6-hours per night), R-band photometry of the outbursting black hole candidate XTE J1118+480 (ATEL #383) was obtained with the...
Optical Outburst of the Halo Black Hole X-ray Transient XTE J1118+480
We report the discovery of a new outburst of the black hole X-ray transient XTE J1118+480 (IAUC #7418, ATEL#64, #67). Observations carried out with the 0.8m...
Optical photometry and polarimetry of GX 339-4 during its outburst rise
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...