NICER observation list: Target ID 566501

Stellar-mass black holes in X-ray transients undergo months-long outbursts during which they explore wide-ranging accretion rates and spectral-timing states. Following transitioning to the thermal/soft state, the black hole undergoes a protracted thermal decline. The pristine thermal/soft state contains only minor contribution from the nonthermal components; most of the emission comes from the thermal accretion disk continuum. Accordingly, this state is the gold-standard for spin measurements via X-ray continuum fitting. We request 10x2ks observations during the thermal phase of the outburst, to monitor a bright black-hole transient in decline, in order to determine its spin. We request up to two triggers over the next cycle, for a maximum of 40ks.