NICER observation list: Target ID 254103


Over the past few years, very successful campaigns on several Galactic black hole (BH) X-ray binaries have revealed tantalising sub-second variations arising in the first acceleration zone at the base of a compact, relativistic jet. But what drives these variations, and are they really as stable as they sometimes appear? We propose anticipated ToO observations of up to 2 hard state outbursts with NICER, strictly simultaneous with ground-based optical/infrared timing. We will probe rapid, sub-second photometric variations and search for inter-band time delays to disentangle the jet/disc/coronal components using spectral-timing, create spectral energy distributions, and probe these systems on theory-critical, unprecedented scales.
Obsid RA DEC l b Start End Exposure Number of
Number of
Status of
Date of
2541030101 284.646 -8.238 26.389 -5.324 58641.0787 58641.1720 2423.0 52 3 VALIDATED 58645.6 58655