[burtonator2011]

this has an easy solution.

1. Build a Dyson sphere around the sun.

2. Capture all the mass in the solar system to build a giant freaking laser.

3. Use the energy to from the Dyson sphere to power the laser.

4. Melt your entire civilization.

[nerfhammer]

If it's a super-earth it probably has an iron core. We should be able to use magnets to crash it into the sun. The impact event will be hard to miss. We'll know where it is for sure then. This is a lot less work than building a Dyson sphere.