Also looking at the pictures of the carbon ceramic brake rotor material it appears to be an almost ideal black body. It should have a very high emissivity. Unlike a shinny steel rotor.
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 4th Gen disc brake fbody rear end.