Click on the image for larger version
This image shows the calibration target for the Chemistry and Camera (ChemCam) instrument on NASA's Curiosity rover. The calibration target is one square and a group of nine circles that look dark in the black-and-white image. The calibration target set can be seen in the middle left in this image, to the right of the rover's power source. The materials used in these circles are the types of materials scientists anticipated they might encounter on Mars. The square is a titanium alloy with a painted edge.
Figure 1 is an annotated version indicating where the target is.
The ChemCam instrument will be firing a series of powerful, but invisible, laser pulses at a target rock or soil. It is located on the rover's mast, near the Navigation camera that took this image. A telescopic camera known as the remote micro-imager will show the context of the spots hit with the laser.
This image was taken by the right-side Navigation camera on Aug. 16, 2012.
JPL manages the Mars Science Laboratory/Curiosity for NASA's Science Mission Directorate in Washington. The rover was designed, developed and assembled at JPL, a division of the California Institute of Technology in Pasadena.