Joint Program candidates with other missions

In accordance with memoranda of understanding, XRISM and complementary missions offer joint programs.

Target Target position Joint Partner Observatory (JPO) Approval [1] XRISM Time
(ks)
JPO Time
(ks)
ToO PI (PPI) Co-PI Notes
RA Dec
HER X-1 254.45754 35.34236 IXPE IXPE Cycle 3
(2026Feb01-2027Mar31)
45 750 Y HERMAN MARSHALL IXPE approved list
4U 1254-69 194.40500 -69.28861 XMM-Newton
NuSTAR
XMM-Newton Cycle 25
(2026May-2027Apr)
29 29 N MARIA DIAZ-TRIGO XMM approved list

[1] Provided are the mission or facility that accepts the joint program and its cycle for which the program is approved.