I use a version of the above as the principle naval energy weapons IMTU. A coilgun accelerates a miniature casaba warhead downrange. This detonates once at a "safe" distance from the muzzle (although detonation usually still occurs close enough to bathe the firing ship in substantial heat as well as radiation).

If your target is on a predictable vector and you've got a coilgun big enough to fire warheads gyroscopic or thruster-based gymbaling, you can set such warheads with a longer detonation delay and potentially hide your own position. The target automatically knows where the warhead detonated, but if the charge is pointed off-axis from the firing vector and also considerably down-range, then it's anyone's guess what the vector of the firing ship might be.

NOTE: I'm well aware of the impossibility of practical stealth in the vacuum of space in a hard-science game. BUT if heat could be somehow captured (such as by some variation on a Langston Field) and then radiated away in a narrow cone, you *could* hide (for limited values of "hide").