NICER observation list: Target ID 673902

We have recently identified a candidate transitional millisecond pulsar (tMSP) in the globular cluster Terzan 6. This source, X2, usually has luminosities between 2.5e33 and 6e34 erg/s. However, RXTE monitoring of the cluster suggests that in rare instances the source enters an outburst state (>1e36 erg/s). During one of these outburst states indications for the presence of X-ray pulsations were seen in a very short RXTE observation. Here we propose a NICER monitoring program of Terzan 6 to catch X2 in an outburst state and confirm the presence of pulsations. We request 114 (0.5 ks) observations with a cadence of 2 days. Although the chances of catching an outburst are small (20% in Cycle 5), identification of X2 as a tMSP would add a valuable new member to a very small class of sources.