With the aim of taking full advantage of the complementarity of ESA's high-energy observing facilities, both project teams have agreed to establish an environment for those scientific programmes that require observations with both the XMM-Newton and the INTEGRAL observatory to achieve outstanding and competitive results.
By agreement with the INTEGRAL Project, the XMM-Newton Project may award up to 300 ks of INTEGRAL observing time. Similarly, the INTEGRAL Project may award up to 300 ks of XMM-Newton time. The time will be awarded only for highly ranked proposals. The only criterion above and beyond the usual review criteria is that both sets of data are required to meet the scientific objectives of the proposal.
The allocated INTEGRAL time should not exceed the allocated XMM-Newton INTEGRAL time. The minimum time per Integral pointing is 1.8 ks, i.e. a minimum of 13 ks for a Hexagonal (7 pointings) and 45 ks for a 5x5 (25 pointings). Other Integral observing modes can not be proposed through this joint program. No observations with a reaction time of less than 5 working days from an unknown triggering date will be considered for this cooperative programme. It is the responsibility of the PI to inform both observatories immediately if the trigger criterion is fulfilled.
It is the proposers' responsibility to provide a full and comprehensive scientific and technical justification for the requested observing time on both facilities. The ESA science operations teams for XMM-Newton and INTEGRAL will perform feasibility checks of the proposals. They each reserve the right to reject any observation determined to be unfeasible for any reason.
Apart from the above, both missions' general policies and procedures currently in force for the final selection of the proposals, the allocation of observing time, the execution of the observations and the data rights remain unchanged.
Scientists can apply for the joint programme in the ``Observation Form'' of the XMM-Newton RPS. For each observation the PI has to specify the required observing time for both observatories. The ``Comment'' field should be used to define the Integral instrument modes (Hexagonal or 5x5) and scheduling constraints.