The SAURON project - XX. The Spitzer [3.6] - [4.5] colour in early-type galaxies: colours, colour gradients and inverted scaling relations by Peletier, R, Kutdemir, E, van der Wolk, G, Falcon-Barroso, J, Bacon, R, Bureau, M, Cappellari, M, Davies, R, de Zeeuw, P, Emsellem, E, Krajnovic, D, Kuntschner, H, McDermid, R, Sarzi, M, Scott, N, Shapiro, K, van den Bosch, R, van de Ven, G