NuSTAR ToO and DDT observation requests will in general not be considered for events or sources that could have been predicted and proposed for in General Observer (GO) programs. This restriction is being adopted as a result of guidance from NASA's 2019 Senior Review.
In particular, requests for observations of the following types of sources and events require special justification describing why the requested observation type could not have been proposed as a GO target:
We encourage the community to propose to the various peer reviewed GO programs for NuSTAR ToO observations. Observations of all selected GO ToO observations automatically have the highest priority for scheduling.
|Active ToO/DDT observations|
|GRS 1915+105||25 ks coordianted with Chandra and NICER observations||PI Neilsen|
|V4641 Sgr||5x20 ks coordinated with 5x10 ks NICER observations for joint NICER / NuSTAR GO program 7113||PI Neilsen|
|GX 339-4||3x20 ks coordinated with NICER for NICER GO program 4152||PI Sridhar|
|4U 1820+30||3 x 20 ks coordinated with NICER for the NICER GO ToO program 4163||PI Homan|
Please review the NuSTAR schedules for details of upcoming observations and the table of approved ToO programs from the NuSTAR GO program and joint GO programs with Chandra, XMM-Newton, INTEGRAL, and the Neil Gehrels Swift Observatory.